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Added Singleton class to inherit as needed

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This commit is contained in:
itdominator 2023-03-27 20:07:17 -05:00
parent 4b69622cc6
commit ca61d5348f
46 changed files with 6455 additions and 97 deletions
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20
plugins/git_clone/download.sh
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#!/bin/bash
# . CONFIG.sh
# set -o xtrace ## To debug scripts
# set -o errexit ## To exit on error
# set -o errunset ## To exit if a variable is referenced but not set
function main() {
cd "$(dirname "")"
echo "Working Dir: " $(pwd)
TARGETDIR="${1}"
LINK=`xclip -selection clipboard -o`
cd "${TARGETDIR}"
git clone "${LINK}"
}
main "$@";

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plugins/git_clone/pexpect/ANSI.py Normal file
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'''This implements an ANSI (VT100) terminal emulator as a subclass of screen.
PEXPECT LICENSE
This license is approved by the OSI and FSF as GPL-compatible.
http://opensource.org/licenses/isc-license.txt
Copyright (c) 2012, Noah Spurrier <noah@noah.org>
PERMISSION TO USE, COPY, MODIFY, AND/OR DISTRIBUTE THIS SOFTWARE FOR ANY
PURPOSE WITH OR WITHOUT FEE IS HEREBY GRANTED, PROVIDED THAT THE ABOVE
COPYRIGHT NOTICE AND THIS PERMISSION NOTICE APPEAR IN ALL COPIES.
THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
'''
# references:
# http://en.wikipedia.org/wiki/ANSI_escape_code
# http://www.retards.org/terminals/vt102.html
# http://vt100.net/docs/vt102-ug/contents.html
# http://vt100.net/docs/vt220-rm/
# http://www.termsys.demon.co.uk/vtansi.htm
from . import screen
from . import FSM
import string
#
# The 'Do.*' functions are helper functions for the ANSI class.
#
def DoEmit (fsm):
screen = fsm.memory[0]
screen.write_ch(fsm.input_symbol)
def DoStartNumber (fsm):
fsm.memory.append (fsm.input_symbol)
def DoBuildNumber (fsm):
ns = fsm.memory.pop()
ns = ns + fsm.input_symbol
fsm.memory.append (ns)
def DoBackOne (fsm):
screen = fsm.memory[0]
screen.cursor_back ()
def DoBack (fsm):
count = int(fsm.memory.pop())
screen = fsm.memory[0]
screen.cursor_back (count)
def DoDownOne (fsm):
screen = fsm.memory[0]
screen.cursor_down ()
def DoDown (fsm):
count = int(fsm.memory.pop())
screen = fsm.memory[0]
screen.cursor_down (count)
def DoForwardOne (fsm):
screen = fsm.memory[0]
screen.cursor_forward ()
def DoForward (fsm):
count = int(fsm.memory.pop())
screen = fsm.memory[0]
screen.cursor_forward (count)
def DoUpReverse (fsm):
screen = fsm.memory[0]
screen.cursor_up_reverse()
def DoUpOne (fsm):
screen = fsm.memory[0]
screen.cursor_up ()
def DoUp (fsm):
count = int(fsm.memory.pop())
screen = fsm.memory[0]
screen.cursor_up (count)
def DoHome (fsm):
c = int(fsm.memory.pop())
r = int(fsm.memory.pop())
screen = fsm.memory[0]
screen.cursor_home (r,c)
def DoHomeOrigin (fsm):
c = 1
r = 1
screen = fsm.memory[0]
screen.cursor_home (r,c)
def DoEraseDown (fsm):
screen = fsm.memory[0]
screen.erase_down()
def DoErase (fsm):
arg = int(fsm.memory.pop())
screen = fsm.memory[0]
if arg == 0:
screen.erase_down()
elif arg == 1:
screen.erase_up()
elif arg == 2:
screen.erase_screen()
def DoEraseEndOfLine (fsm):
screen = fsm.memory[0]
screen.erase_end_of_line()
def DoEraseLine (fsm):
arg = int(fsm.memory.pop())
screen = fsm.memory[0]
if arg == 0:
screen.erase_end_of_line()
elif arg == 1:
screen.erase_start_of_line()
elif arg == 2:
screen.erase_line()
def DoEnableScroll (fsm):
screen = fsm.memory[0]
screen.scroll_screen()
def DoCursorSave (fsm):
screen = fsm.memory[0]
screen.cursor_save_attrs()
def DoCursorRestore (fsm):
screen = fsm.memory[0]
screen.cursor_restore_attrs()
def DoScrollRegion (fsm):
screen = fsm.memory[0]
r2 = int(fsm.memory.pop())
r1 = int(fsm.memory.pop())
screen.scroll_screen_rows (r1,r2)
def DoMode (fsm):
screen = fsm.memory[0]
mode = fsm.memory.pop() # Should be 4
# screen.setReplaceMode ()
def DoLog (fsm):
screen = fsm.memory[0]
fsm.memory = [screen]
fout = open ('log', 'a')
fout.write (fsm.input_symbol + ',' + fsm.current_state + '\n')
fout.close()
class term (screen.screen):
'''This class is an abstract, generic terminal.
This does nothing. This is a placeholder that
provides a common base class for other terminals
such as an ANSI terminal. '''
def __init__ (self, r=24, c=80, *args, **kwargs):
screen.screen.__init__(self, r,c,*args,**kwargs)
class ANSI (term):
'''This class implements an ANSI (VT100) terminal.
It is a stream filter that recognizes ANSI terminal
escape sequences and maintains the state of a screen object. '''
def __init__ (self, r=24,c=80,*args,**kwargs):
term.__init__(self,r,c,*args,**kwargs)
#self.screen = screen (24,80)
self.state = FSM.FSM ('INIT',[self])
self.state.set_default_transition (DoLog, 'INIT')
self.state.add_transition_any ('INIT', DoEmit, 'INIT')
self.state.add_transition ('\x1b', 'INIT', None, 'ESC')
self.state.add_transition_any ('ESC', DoLog, 'INIT')
self.state.add_transition ('(', 'ESC', None, 'G0SCS')
self.state.add_transition (')', 'ESC', None, 'G1SCS')
self.state.add_transition_list ('AB012', 'G0SCS', None, 'INIT')
self.state.add_transition_list ('AB012', 'G1SCS', None, 'INIT')
self.state.add_transition ('7', 'ESC', DoCursorSave, 'INIT')
self.state.add_transition ('8', 'ESC', DoCursorRestore, 'INIT')
self.state.add_transition ('M', 'ESC', DoUpReverse, 'INIT')
self.state.add_transition ('>', 'ESC', DoUpReverse, 'INIT')
self.state.add_transition ('<', 'ESC', DoUpReverse, 'INIT')
self.state.add_transition ('=', 'ESC', None, 'INIT') # Selects application keypad.
self.state.add_transition ('#', 'ESC', None, 'GRAPHICS_POUND')
self.state.add_transition_any ('GRAPHICS_POUND', None, 'INIT')
self.state.add_transition ('[', 'ESC', None, 'ELB')
# ELB means Escape Left Bracket. That is ^[[
self.state.add_transition ('H', 'ELB', DoHomeOrigin, 'INIT')
self.state.add_transition ('D', 'ELB', DoBackOne, 'INIT')
self.state.add_transition ('B', 'ELB', DoDownOne, 'INIT')
self.state.add_transition ('C', 'ELB', DoForwardOne, 'INIT')
self.state.add_transition ('A', 'ELB', DoUpOne, 'INIT')
self.state.add_transition ('J', 'ELB', DoEraseDown, 'INIT')
self.state.add_transition ('K', 'ELB', DoEraseEndOfLine, 'INIT')
self.state.add_transition ('r', 'ELB', DoEnableScroll, 'INIT')
self.state.add_transition ('m', 'ELB', self.do_sgr, 'INIT')
self.state.add_transition ('?', 'ELB', None, 'MODECRAP')
self.state.add_transition_list (string.digits, 'ELB', DoStartNumber, 'NUMBER_1')
self.state.add_transition_list (string.digits, 'NUMBER_1', DoBuildNumber, 'NUMBER_1')
self.state.add_transition ('D', 'NUMBER_1', DoBack, 'INIT')
self.state.add_transition ('B', 'NUMBER_1', DoDown, 'INIT')
self.state.add_transition ('C', 'NUMBER_1', DoForward, 'INIT')
self.state.add_transition ('A', 'NUMBER_1', DoUp, 'INIT')
self.state.add_transition ('J', 'NUMBER_1', DoErase, 'INIT')
self.state.add_transition ('K', 'NUMBER_1', DoEraseLine, 'INIT')
self.state.add_transition ('l', 'NUMBER_1', DoMode, 'INIT')
### It gets worse... the 'm' code can have infinite number of
### number;number;number before it. I've never seen more than two,
### but the specs say it's allowed. crap!
self.state.add_transition ('m', 'NUMBER_1', self.do_sgr, 'INIT')
### LED control. Same implementation problem as 'm' code.
self.state.add_transition ('q', 'NUMBER_1', self.do_decsca, 'INIT')
# \E[?47h switch to alternate screen
# \E[?47l restores to normal screen from alternate screen.
self.state.add_transition_list (string.digits, 'MODECRAP', DoStartNumber, 'MODECRAP_NUM')
self.state.add_transition_list (string.digits, 'MODECRAP_NUM', DoBuildNumber, 'MODECRAP_NUM')
self.state.add_transition ('l', 'MODECRAP_NUM', self.do_modecrap, 'INIT')
self.state.add_transition ('h', 'MODECRAP_NUM', self.do_modecrap, 'INIT')
#RM Reset Mode Esc [ Ps l none
self.state.add_transition (';', 'NUMBER_1', None, 'SEMICOLON')
self.state.add_transition_any ('SEMICOLON', DoLog, 'INIT')
self.state.add_transition_list (string.digits, 'SEMICOLON', DoStartNumber, 'NUMBER_2')
self.state.add_transition_list (string.digits, 'NUMBER_2', DoBuildNumber, 'NUMBER_2')
self.state.add_transition_any ('NUMBER_2', DoLog, 'INIT')
self.state.add_transition ('H', 'NUMBER_2', DoHome, 'INIT')
self.state.add_transition ('f', 'NUMBER_2', DoHome, 'INIT')
self.state.add_transition ('r', 'NUMBER_2', DoScrollRegion, 'INIT')
### It gets worse... the 'm' code can have infinite number of
### number;number;number before it. I've never seen more than two,
### but the specs say it's allowed. crap!
self.state.add_transition ('m', 'NUMBER_2', self.do_sgr, 'INIT')
### LED control. Same problem as 'm' code.
self.state.add_transition ('q', 'NUMBER_2', self.do_decsca, 'INIT')
self.state.add_transition (';', 'NUMBER_2', None, 'SEMICOLON_X')
# Create a state for 'q' and 'm' which allows an infinite number of ignored numbers
self.state.add_transition_any ('SEMICOLON_X', DoLog, 'INIT')
self.state.add_transition_list (string.digits, 'SEMICOLON_X', DoStartNumber, 'NUMBER_X')
self.state.add_transition_list (string.digits, 'NUMBER_X', DoBuildNumber, 'NUMBER_X')
self.state.add_transition_any ('NUMBER_X', DoLog, 'INIT')
self.state.add_transition ('m', 'NUMBER_X', self.do_sgr, 'INIT')
self.state.add_transition ('q', 'NUMBER_X', self.do_decsca, 'INIT')
self.state.add_transition (';', 'NUMBER_X', None, 'SEMICOLON_X')
def process (self, c):
"""Process a single character. Called by :meth:`write`."""
if isinstance(c, bytes):
c = self._decode(c)
self.state.process(c)
def process_list (self, l):
self.write(l)
def write (self, s):
"""Process text, writing it to the virtual screen while handling
ANSI escape codes.
"""
if isinstance(s, bytes):
s = self._decode(s)
for c in s:
self.process(c)
def flush (self):
pass
def write_ch (self, ch):
'''This puts a character at the current cursor position. The cursor
position is moved forward with wrap-around, but no scrolling is done if
the cursor hits the lower-right corner of the screen. '''
if isinstance(ch, bytes):
ch = self._decode(ch)
#\r and \n both produce a call to cr() and lf(), respectively.
ch = ch[0]
if ch == u'\r':
self.cr()
return
if ch == u'\n':
self.crlf()
return
if ch == chr(screen.BS):
self.cursor_back()
return
self.put_abs(self.cur_r, self.cur_c, ch)
old_r = self.cur_r
old_c = self.cur_c
self.cursor_forward()
if old_c == self.cur_c:
self.cursor_down()
if old_r != self.cur_r:
self.cursor_home (self.cur_r, 1)
else:
self.scroll_up ()
self.cursor_home (self.cur_r, 1)
self.erase_line()
def do_sgr (self, fsm):
'''Select Graphic Rendition, e.g. color. '''
screen = fsm.memory[0]
fsm.memory = [screen]
def do_decsca (self, fsm):
'''Select character protection attribute. '''
screen = fsm.memory[0]
fsm.memory = [screen]
def do_modecrap (self, fsm):
'''Handler for \x1b[?<number>h and \x1b[?<number>l. If anyone
wanted to actually use these, they'd need to add more states to the
FSM rather than just improve or override this method. '''
screen = fsm.memory[0]
fsm.memory = [screen]

334
plugins/git_clone/pexpect/FSM.py Normal file
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#!/usr/bin/env python
'''This module implements a Finite State Machine (FSM). In addition to state
this FSM also maintains a user defined "memory". So this FSM can be used as a
Push-down Automata (PDA) since a PDA is a FSM + memory.
The following describes how the FSM works, but you will probably also need to
see the example function to understand how the FSM is used in practice.
You define an FSM by building tables of transitions. For a given input symbol
the process() method uses these tables to decide what action to call and what
the next state will be. The FSM has a table of transitions that associate:
(input_symbol, current_state) --> (action, next_state)
Where "action" is a function you define. The symbols and states can be any
objects. You use the add_transition() and add_transition_list() methods to add
to the transition table. The FSM also has a table of transitions that
associate:
(current_state) --> (action, next_state)
You use the add_transition_any() method to add to this transition table. The
FSM also has one default transition that is not associated with any specific
input_symbol or state. You use the set_default_transition() method to set the
default transition.
When an action function is called it is passed a reference to the FSM. The
action function may then access attributes of the FSM such as input_symbol,
current_state, or "memory". The "memory" attribute can be any object that you
want to pass along to the action functions. It is not used by the FSM itself.
For parsing you would typically pass a list to be used as a stack.
The processing sequence is as follows. The process() method is given an
input_symbol to process. The FSM will search the table of transitions that
associate:
(input_symbol, current_state) --> (action, next_state)
If the pair (input_symbol, current_state) is found then process() will call the
associated action function and then set the current state to the next_state.
If the FSM cannot find a match for (input_symbol, current_state) it will then
search the table of transitions that associate:
(current_state) --> (action, next_state)
If the current_state is found then the process() method will call the
associated action function and then set the current state to the next_state.
Notice that this table lacks an input_symbol. It lets you define transitions
for a current_state and ANY input_symbol. Hence, it is called the "any" table.
Remember, it is always checked after first searching the table for a specific
(input_symbol, current_state).
For the case where the FSM did not match either of the previous two cases the
FSM will try to use the default transition. If the default transition is
defined then the process() method will call the associated action function and
then set the current state to the next_state. This lets you define a default
transition as a catch-all case. You can think of it as an exception handler.
There can be only one default transition.
Finally, if none of the previous cases are defined for an input_symbol and
current_state then the FSM will raise an exception. This may be desirable, but
you can always prevent this just by defining a default transition.
Noah Spurrier 20020822
PEXPECT LICENSE
This license is approved by the OSI and FSF as GPL-compatible.
http://opensource.org/licenses/isc-license.txt
Copyright (c) 2012, Noah Spurrier <noah@noah.org>
PERMISSION TO USE, COPY, MODIFY, AND/OR DISTRIBUTE THIS SOFTWARE FOR ANY
PURPOSE WITH OR WITHOUT FEE IS HEREBY GRANTED, PROVIDED THAT THE ABOVE
COPYRIGHT NOTICE AND THIS PERMISSION NOTICE APPEAR IN ALL COPIES.
THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
'''
class ExceptionFSM(Exception):
'''This is the FSM Exception class.'''
def __init__(self, value):
self.value = value
def __str__(self):
return 'ExceptionFSM: ' + str(self.value)
class FSM:
'''This is a Finite State Machine (FSM).
'''
def __init__(self, initial_state, memory=None):
'''This creates the FSM. You set the initial state here. The "memory"
attribute is any object that you want to pass along to the action
functions. It is not used by the FSM. For parsing you would typically
pass a list to be used as a stack. '''
# Map (input_symbol, current_state) --> (action, next_state).
self.state_transitions = {}
# Map (current_state) --> (action, next_state).
self.state_transitions_any = {}
self.default_transition = None
self.input_symbol = None
self.initial_state = initial_state
self.current_state = self.initial_state
self.next_state = None
self.action = None
self.memory = memory
def reset (self):
'''This sets the current_state to the initial_state and sets
input_symbol to None. The initial state was set by the constructor
__init__(). '''
self.current_state = self.initial_state
self.input_symbol = None
def add_transition (self, input_symbol, state, action=None, next_state=None):
'''This adds a transition that associates:
(input_symbol, current_state) --> (action, next_state)
The action may be set to None in which case the process() method will
ignore the action and only set the next_state. The next_state may be
set to None in which case the current state will be unchanged.
You can also set transitions for a list of symbols by using
add_transition_list(). '''
if next_state is None:
next_state = state
self.state_transitions[(input_symbol, state)] = (action, next_state)
def add_transition_list (self, list_input_symbols, state, action=None, next_state=None):
'''This adds the same transition for a list of input symbols.
You can pass a list or a string. Note that it is handy to use
string.digits, string.whitespace, string.letters, etc. to add
transitions that match character classes.
The action may be set to None in which case the process() method will
ignore the action and only set the next_state. The next_state may be
set to None in which case the current state will be unchanged. '''
if next_state is None:
next_state = state
for input_symbol in list_input_symbols:
self.add_transition (input_symbol, state, action, next_state)
def add_transition_any (self, state, action=None, next_state=None):
'''This adds a transition that associates:
(current_state) --> (action, next_state)
That is, any input symbol will match the current state.
The process() method checks the "any" state associations after it first
checks for an exact match of (input_symbol, current_state).
The action may be set to None in which case the process() method will
ignore the action and only set the next_state. The next_state may be
set to None in which case the current state will be unchanged. '''
if next_state is None:
next_state = state
self.state_transitions_any [state] = (action, next_state)
def set_default_transition (self, action, next_state):
'''This sets the default transition. This defines an action and
next_state if the FSM cannot find the input symbol and the current
state in the transition list and if the FSM cannot find the
current_state in the transition_any list. This is useful as a final
fall-through state for catching errors and undefined states.
The default transition can be removed by setting the attribute
default_transition to None. '''
self.default_transition = (action, next_state)
def get_transition (self, input_symbol, state):
'''This returns (action, next state) given an input_symbol and state.
This does not modify the FSM state, so calling this method has no side
effects. Normally you do not call this method directly. It is called by
process().
The sequence of steps to check for a defined transition goes from the
most specific to the least specific.
1. Check state_transitions[] that match exactly the tuple,
(input_symbol, state)
2. Check state_transitions_any[] that match (state)
In other words, match a specific state and ANY input_symbol.
3. Check if the default_transition is defined.
This catches any input_symbol and any state.
This is a handler for errors, undefined states, or defaults.
4. No transition was defined. If we get here then raise an exception.
'''
if (input_symbol, state) in self.state_transitions:
return self.state_transitions[(input_symbol, state)]
elif state in self.state_transitions_any:
return self.state_transitions_any[state]
elif self.default_transition is not None:
return self.default_transition
else:
raise ExceptionFSM ('Transition is undefined: (%s, %s).' %
(str(input_symbol), str(state)) )
def process (self, input_symbol):
'''This is the main method that you call to process input. This may
cause the FSM to change state and call an action. This method calls
get_transition() to find the action and next_state associated with the
input_symbol and current_state. If the action is None then the action
is not called and only the current state is changed. This method
processes one complete input symbol. You can process a list of symbols
(or a string) by calling process_list(). '''
self.input_symbol = input_symbol
(self.action, self.next_state) = self.get_transition (self.input_symbol, self.current_state)
if self.action is not None:
self.action (self)
self.current_state = self.next_state
self.next_state = None
def process_list (self, input_symbols):
'''This takes a list and sends each element to process(). The list may
be a string or any iterable object. '''
for s in input_symbols:
self.process (s)
##############################################################################
# The following is an example that demonstrates the use of the FSM class to
# process an RPN expression. Run this module from the command line. You will
# get a prompt > for input. Enter an RPN Expression. Numbers may be integers.
# Operators are * / + - Use the = sign to evaluate and print the expression.
# For example:
#
# 167 3 2 2 * * * 1 - =
#
# will print:
#
# 2003
##############################################################################
import sys
import string
PY3 = (sys.version_info[0] >= 3)
#
# These define the actions.
# Note that "memory" is a list being used as a stack.
#
def BeginBuildNumber (fsm):
fsm.memory.append (fsm.input_symbol)
def BuildNumber (fsm):
s = fsm.memory.pop ()
s = s + fsm.input_symbol
fsm.memory.append (s)
def EndBuildNumber (fsm):
s = fsm.memory.pop ()
fsm.memory.append (int(s))
def DoOperator (fsm):
ar = fsm.memory.pop()
al = fsm.memory.pop()
if fsm.input_symbol == '+':
fsm.memory.append (al + ar)
elif fsm.input_symbol == '-':
fsm.memory.append (al - ar)
elif fsm.input_symbol == '*':
fsm.memory.append (al * ar)
elif fsm.input_symbol == '/':
fsm.memory.append (al / ar)
def DoEqual (fsm):
print(str(fsm.memory.pop()))
def Error (fsm):
print('That does not compute.')
print(str(fsm.input_symbol))
def main():
'''This is where the example starts and the FSM state transitions are
defined. Note that states are strings (such as 'INIT'). This is not
necessary, but it makes the example easier to read. '''
f = FSM ('INIT', [])
f.set_default_transition (Error, 'INIT')
f.add_transition_any ('INIT', None, 'INIT')
f.add_transition ('=', 'INIT', DoEqual, 'INIT')
f.add_transition_list (string.digits, 'INIT', BeginBuildNumber, 'BUILDING_NUMBER')
f.add_transition_list (string.digits, 'BUILDING_NUMBER', BuildNumber, 'BUILDING_NUMBER')
f.add_transition_list (string.whitespace, 'BUILDING_NUMBER', EndBuildNumber, 'INIT')
f.add_transition_list ('+-*/', 'INIT', DoOperator, 'INIT')
print()
print('Enter an RPN Expression.')
print('Numbers may be integers. Operators are * / + -')
print('Use the = sign to evaluate and print the expression.')
print('For example: ')
print(' 167 3 2 2 * * * 1 - =')
inputstr = (input if PY3 else raw_input)('> ') # analysis:ignore
f.process_list(inputstr)
if __name__ == '__main__':
main()

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plugins/git_clone/pexpect/LICENSE Normal file
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ISC LICENSE
This license is approved by the OSI and FSF as GPL-compatible.
http://opensource.org/licenses/isc-license.txt
Copyright (c) 2013-2014, Pexpect development team
Copyright (c) 2012, Noah Spurrier <noah@noah.org>
Permission to use, copy, modify, and/or distribute this software for any
purpose with or without fee is hereby granted, provided that the above
copyright notice and this permission notice appear in all copies.
THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

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'''Pexpect is a Python module for spawning child applications and controlling
them automatically. Pexpect can be used for automating interactive applications
such as ssh, ftp, passwd, telnet, etc. It can be used to a automate setup
scripts for duplicating software package installations on different servers. It
can be used for automated software testing. Pexpect is in the spirit of Don
Libes' Expect, but Pexpect is pure Python. Other Expect-like modules for Python
require TCL and Expect or require C extensions to be compiled. Pexpect does not
use C, Expect, or TCL extensions. It should work on any platform that supports
the standard Python pty module. The Pexpect interface focuses on ease of use so
that simple tasks are easy.
There are two main interfaces to the Pexpect system; these are the function,
run() and the class, spawn. The spawn class is more powerful. The run()
function is simpler than spawn, and is good for quickly calling program. When
you call the run() function it executes a given program and then returns the
output. This is a handy replacement for os.system().
For example::
pexpect.run('ls -la')
The spawn class is the more powerful interface to the Pexpect system. You can
use this to spawn a child program then interact with it by sending input and
expecting responses (waiting for patterns in the child's output).
For example::
child = pexpect.spawn('scp foo user@example.com:.')
child.expect('Password:')
child.sendline(mypassword)
This works even for commands that ask for passwords or other input outside of
the normal stdio streams. For example, ssh reads input directly from the TTY
device which bypasses stdin.
Credits: Noah Spurrier, Richard Holden, Marco Molteni, Kimberley Burchett,
Robert Stone, Hartmut Goebel, Chad Schroeder, Erick Tryzelaar, Dave Kirby, Ids
vander Molen, George Todd, Noel Taylor, Nicolas D. Cesar, Alexander Gattin,
Jacques-Etienne Baudoux, Geoffrey Marshall, Francisco Lourenco, Glen Mabey,
Karthik Gurusamy, Fernando Perez, Corey Minyard, Jon Cohen, Guillaume
Chazarain, Andrew Ryan, Nick Craig-Wood, Andrew Stone, Jorgen Grahn, John
Spiegel, Jan Grant, and Shane Kerr. Let me know if I forgot anyone.
Pexpect is free, open source, and all that good stuff.
http://pexpect.sourceforge.net/
PEXPECT LICENSE
This license is approved by the OSI and FSF as GPL-compatible.
http://opensource.org/licenses/isc-license.txt
Copyright (c) 2012, Noah Spurrier <noah@noah.org>
PERMISSION TO USE, COPY, MODIFY, AND/OR DISTRIBUTE THIS SOFTWARE FOR ANY
PURPOSE WITH OR WITHOUT FEE IS HEREBY GRANTED, PROVIDED THAT THE ABOVE
COPYRIGHT NOTICE AND THIS PERMISSION NOTICE APPEAR IN ALL COPIES.
THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
'''
import sys
PY3 = (sys.version_info[0] >= 3)
from .exceptions import ExceptionPexpect, EOF, TIMEOUT
from .utils import split_command_line, which, is_executable_file
from .expect import Expecter, searcher_re, searcher_string
if sys.platform != 'win32':
# On Unix, these are available at the top level for backwards compatibility
from .pty_spawn import spawn, spawnu
from .run import run, runu
__version__ = '4.8.0'
__revision__ = ''
__all__ = ['ExceptionPexpect', 'EOF', 'TIMEOUT', 'spawn', 'spawnu', 'run', 'runu',
'which', 'split_command_line', '__version__', '__revision__']
# vim: set shiftround expandtab tabstop=4 shiftwidth=4 ft=python autoindent :

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import asyncio
import errno
import signal
from pexpect import EOF
@asyncio.coroutine
def expect_async(expecter, timeout=None):
# First process data that was previously read - if it maches, we don't need
# async stuff.
idx = expecter.existing_data()
if idx is not None:
return idx
if not expecter.spawn.async_pw_transport:
pw = PatternWaiter()
pw.set_expecter(expecter)
transport, pw = yield from asyncio.get_event_loop()\
.connect_read_pipe(lambda: pw, expecter.spawn)
expecter.spawn.async_pw_transport = pw, transport
else:
pw, transport = expecter.spawn.async_pw_transport
pw.set_expecter(expecter)
transport.resume_reading()
try:
return (yield from asyncio.wait_for(pw.fut, timeout))
except asyncio.TimeoutError as e:
transport.pause_reading()
return expecter.timeout(e)
@asyncio.coroutine
def repl_run_command_async(repl, cmdlines, timeout=-1):
res = []
repl.child.sendline(cmdlines[0])
for line in cmdlines[1:]:
yield from repl._expect_prompt(timeout=timeout, async_=True)
res.append(repl.child.before)
repl.child.sendline(line)
# Command was fully submitted, now wait for the next prompt
prompt_idx = yield from repl._expect_prompt(timeout=timeout, async_=True)
if prompt_idx == 1:
# We got the continuation prompt - command was incomplete
repl.child.kill(signal.SIGINT)
yield from repl._expect_prompt(timeout=1, async_=True)
raise ValueError("Continuation prompt found - input was incomplete:")
return u''.join(res + [repl.child.before])
class PatternWaiter(asyncio.Protocol):
transport = None
def set_expecter(self, expecter):
self.expecter = expecter
self.fut = asyncio.Future()
def found(self, result):
if not self.fut.done():
self.fut.set_result(result)
self.transport.pause_reading()
def error(self, exc):
if not self.fut.done():
self.fut.set_exception(exc)
self.transport.pause_reading()
def connection_made(self, transport):
self.transport = transport
def data_received(self, data):
spawn = self.expecter.spawn
s = spawn._decoder.decode(data)
spawn._log(s, 'read')
if self.fut.done():
spawn._before.write(s)
spawn._buffer.write(s)
return
try:
index = self.expecter.new_data(s)
if index is not None:
# Found a match
self.found(index)
except Exception as e:
self.expecter.errored()
self.error(e)
def eof_received(self):
# N.B. If this gets called, async will close the pipe (the spawn object)
# for us
try:
self.expecter.spawn.flag_eof = True
index = self.expecter.eof()
except EOF as e:
self.error(e)
else:
self.found(index)
def connection_lost(self, exc):
if isinstance(exc, OSError) and exc.errno == errno.EIO:
# We may get here without eof_received being called, e.g on Linux
self.eof_received()
elif exc is not None:
self.error(exc)

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# Different platforms have different names for the systemwide bashrc
if [[ -f /etc/bashrc ]]; then
source /etc/bashrc
fi
if [[ -f /etc/bash.bashrc ]]; then
source /etc/bash.bashrc
fi
if [[ -f ~/.bashrc ]]; then
source ~/.bashrc
fi
# Reset PS1 so pexpect can find it
PS1="$"
# Unset PROMPT_COMMAND, so that it can't change PS1 to something unexpected.
unset PROMPT_COMMAND

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"""Exception classes used by Pexpect"""
import traceback
import sys
class ExceptionPexpect(Exception):
'''Base class for all exceptions raised by this module.
'''
def __init__(self, value):
super(ExceptionPexpect, self).__init__(value)
self.value = value
def __str__(self):
return str(self.value)
def get_trace(self):
'''This returns an abbreviated stack trace with lines that only concern
the caller. In other words, the stack trace inside the Pexpect module
is not included. '''
tblist = traceback.extract_tb(sys.exc_info()[2])
tblist = [item for item in tblist if ('pexpect/__init__' not in item[0])
and ('pexpect/expect' not in item[0])]
tblist = traceback.format_list(tblist)
return ''.join(tblist)
class EOF(ExceptionPexpect):
'''Raised when EOF is read from a child.
This usually means the child has exited.'''
class TIMEOUT(ExceptionPexpect):
'''Raised when a read time exceeds the timeout. '''

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import time
from .exceptions import EOF, TIMEOUT
class Expecter(object):
def __init__(self, spawn, searcher, searchwindowsize=-1):
self.spawn = spawn
self.searcher = searcher
# A value of -1 means to use the figure from spawn, which should
# be None or a positive number.
if searchwindowsize == -1:
searchwindowsize = spawn.searchwindowsize
self.searchwindowsize = searchwindowsize
self.lookback = None
if hasattr(searcher, 'longest_string'):
self.lookback = searcher.longest_string
def do_search(self, window, freshlen):
spawn = self.spawn
searcher = self.searcher
if freshlen > len(window):
freshlen = len(window)
index = searcher.search(window, freshlen, self.searchwindowsize)
if index >= 0:
spawn._buffer = spawn.buffer_type()
spawn._buffer.write(window[searcher.end:])
spawn.before = spawn._before.getvalue()[
0:-(len(window) - searcher.start)]
spawn._before = spawn.buffer_type()
spawn._before.write(window[searcher.end:])
spawn.after = window[searcher.start:searcher.end]
spawn.match = searcher.match
spawn.match_index = index
# Found a match
return index
elif self.searchwindowsize or self.lookback:
maintain = self.searchwindowsize or self.lookback
if spawn._buffer.tell() > maintain:
spawn._buffer = spawn.buffer_type()
spawn._buffer.write(window[-maintain:])
def existing_data(self):
# First call from a new call to expect_loop or expect_async.
# self.searchwindowsize may have changed.
# Treat all data as fresh.
spawn = self.spawn
before_len = spawn._before.tell()
buf_len = spawn._buffer.tell()
freshlen = before_len
if before_len > buf_len:
if not self.searchwindowsize:
spawn._buffer = spawn.buffer_type()
window = spawn._before.getvalue()
spawn._buffer.write(window)
elif buf_len < self.searchwindowsize:
spawn._buffer = spawn.buffer_type()
spawn._before.seek(
max(0, before_len - self.searchwindowsize))
window = spawn._before.read()
spawn._buffer.write(window)
else:
spawn._buffer.seek(max(0, buf_len - self.searchwindowsize))
window = spawn._buffer.read()
else:
if self.searchwindowsize:
spawn._buffer.seek(max(0, buf_len - self.searchwindowsize))
window = spawn._buffer.read()
else:
window = spawn._buffer.getvalue()
return self.do_search(window, freshlen)
def new_data(self, data):
# A subsequent call, after a call to existing_data.
spawn = self.spawn
freshlen = len(data)
spawn._before.write(data)
if not self.searchwindowsize:
if self.lookback:
# search lookback + new data.
old_len = spawn._buffer.tell()
spawn._buffer.write(data)
spawn._buffer.seek(max(0, old_len - self.lookback))
window = spawn._buffer.read()
else:
# copy the whole buffer (really slow for large datasets).
spawn._buffer.write(data)
window = spawn.buffer
else:
if len(data) >= self.searchwindowsize or not spawn._buffer.tell():
window = data[-self.searchwindowsize:]
spawn._buffer = spawn.buffer_type()
spawn._buffer.write(window[-self.searchwindowsize:])
else:
spawn._buffer.write(data)
new_len = spawn._buffer.tell()
spawn._buffer.seek(max(0, new_len - self.searchwindowsize))
window = spawn._buffer.read()
return self.do_search(window, freshlen)
def eof(self, err=None):
spawn = self.spawn
spawn.before = spawn._before.getvalue()
spawn._buffer = spawn.buffer_type()
spawn._before = spawn.buffer_type()
spawn.after = EOF
index = self.searcher.eof_index
if index >= 0:
spawn.match = EOF
spawn.match_index = index
return index
else:
spawn.match = None
spawn.match_index = None
msg = str(spawn)
msg += '\nsearcher: %s' % self.searcher
if err is not None:
msg = str(err) + '\n' + msg
exc = EOF(msg)
exc.__cause__ = None # in Python 3.x we can use "raise exc from None"
raise exc
def timeout(self, err=None):
spawn = self.spawn
spawn.before = spawn._before.getvalue()
spawn.after = TIMEOUT
index = self.searcher.timeout_index
if index >= 0:
spawn.match = TIMEOUT
spawn.match_index = index
return index
else:
spawn.match = None
spawn.match_index = None
msg = str(spawn)
msg += '\nsearcher: %s' % self.searcher
if err is not None:
msg = str(err) + '\n' + msg
exc = TIMEOUT(msg)
exc.__cause__ = None # in Python 3.x we can use "raise exc from None"
raise exc
def errored(self):
spawn = self.spawn
spawn.before = spawn._before.getvalue()
spawn.after = None
spawn.match = None
spawn.match_index = None
def expect_loop(self, timeout=-1):
"""Blocking expect"""
spawn = self.spawn
if timeout is not None:
end_time = time.time() + timeout
try:
idx = self.existing_data()
if idx is not None:
return idx
while True:
# No match at this point
if (timeout is not None) and (timeout < 0):
return self.timeout()
# Still have time left, so read more data
incoming = spawn.read_nonblocking(spawn.maxread, timeout)
if self.spawn.delayafterread is not None:
time.sleep(self.spawn.delayafterread)
idx = self.new_data(incoming)
# Keep reading until exception or return.
if idx is not None:
return idx
if timeout is not None:
timeout = end_time - time.time()
except EOF as e:
return self.eof(e)
except TIMEOUT as e:
return self.timeout(e)
except:
self.errored()
raise
class searcher_string(object):
'''This is a plain string search helper for the spawn.expect_any() method.
This helper class is for speed. For more powerful regex patterns
see the helper class, searcher_re.
Attributes:
eof_index - index of EOF, or -1
timeout_index - index of TIMEOUT, or -1
After a successful match by the search() method the following attributes
are available:
start - index into the buffer, first byte of match
end - index into the buffer, first byte after match
match - the matching string itself
'''
def __init__(self, strings):
'''This creates an instance of searcher_string. This argument 'strings'
may be a list; a sequence of strings; or the EOF or TIMEOUT types. '''
self.eof_index = -1
self.timeout_index = -1
self._strings = []
self.longest_string = 0
for n, s in enumerate(strings):
if s is EOF:
self.eof_index = n
continue
if s is TIMEOUT:
self.timeout_index = n
continue
self._strings.append((n, s))
if len(s) > self.longest_string:
self.longest_string = len(s)
def __str__(self):
'''This returns a human-readable string that represents the state of
the object.'''
ss = [(ns[0], ' %d: %r' % ns) for ns in self._strings]
ss.append((-1, 'searcher_string:'))
if self.eof_index >= 0:
ss.append((self.eof_index, ' %d: EOF' % self.eof_index))
if self.timeout_index >= 0:
ss.append((self.timeout_index,
' %d: TIMEOUT' % self.timeout_index))
ss.sort()
ss = list(zip(*ss))[1]
return '\n'.join(ss)
def search(self, buffer, freshlen, searchwindowsize=None):
'''This searches 'buffer' for the first occurrence of one of the search
strings. 'freshlen' must indicate the number of bytes at the end of
'buffer' which have not been searched before. It helps to avoid
searching the same, possibly big, buffer over and over again.
See class spawn for the 'searchwindowsize' argument.
If there is a match this returns the index of that string, and sets
'start', 'end' and 'match'. Otherwise, this returns -1. '''
first_match = None
# 'freshlen' helps a lot here. Further optimizations could
# possibly include:
#
# using something like the Boyer-Moore Fast String Searching
# Algorithm; pre-compiling the search through a list of
# strings into something that can scan the input once to
# search for all N strings; realize that if we search for
# ['bar', 'baz'] and the input is '...foo' we need not bother
# rescanning until we've read three more bytes.
#
# Sadly, I don't know enough about this interesting topic. /grahn
for index, s in self._strings:
if searchwindowsize is None:
# the match, if any, can only be in the fresh data,
# or at the very end of the old data
offset = -(freshlen + len(s))
else:
# better obey searchwindowsize
offset = -searchwindowsize
n = buffer.find(s, offset)
if n >= 0 and (first_match is None or n < first_match):
first_match = n
best_index, best_match = index, s
if first_match is None:
return -1
self.match = best_match
self.start = first_match
self.end = self.start + len(self.match)
return best_index
class searcher_re(object):
'''This is regular expression string search helper for the
spawn.expect_any() method. This helper class is for powerful
pattern matching. For speed, see the helper class, searcher_string.
Attributes:
eof_index - index of EOF, or -1
timeout_index - index of TIMEOUT, or -1
After a successful match by the search() method the following attributes
are available:
start - index into the buffer, first byte of match
end - index into the buffer, first byte after match
match - the re.match object returned by a successful re.search
'''
def __init__(self, patterns):
'''This creates an instance that searches for 'patterns' Where
'patterns' may be a list or other sequence of compiled regular
expressions, or the EOF or TIMEOUT types.'''
self.eof_index = -1
self.timeout_index = -1
self._searches = []
for n, s in enumerate(patterns):
if s is EOF:
self.eof_index = n
continue
if s is TIMEOUT:
self.timeout_index = n
continue
self._searches.append((n, s))
def __str__(self):
'''This returns a human-readable string that represents the state of
the object.'''
#ss = [(n, ' %d: re.compile("%s")' %
# (n, repr(s.pattern))) for n, s in self._searches]
ss = list()
for n, s in self._searches:
ss.append((n, ' %d: re.compile(%r)' % (n, s.pattern)))
ss.append((-1, 'searcher_re:'))
if self.eof_index >= 0:
ss.append((self.eof_index, ' %d: EOF' % self.eof_index))
if self.timeout_index >= 0:
ss.append((self.timeout_index, ' %d: TIMEOUT' %
self.timeout_index))
ss.sort()
ss = list(zip(*ss))[1]
return '\n'.join(ss)
def search(self, buffer, freshlen, searchwindowsize=None):
'''This searches 'buffer' for the first occurrence of one of the regular
expressions. 'freshlen' must indicate the number of bytes at the end of
'buffer' which have not been searched before.
See class spawn for the 'searchwindowsize' argument.
If there is a match this returns the index of that string, and sets
'start', 'end' and 'match'. Otherwise, returns -1.'''
first_match = None
# 'freshlen' doesn't help here -- we cannot predict the
# length of a match, and the re module provides no help.
if searchwindowsize is None:
searchstart = 0
else:
searchstart = max(0, len(buffer) - searchwindowsize)
for index, s in self._searches:
match = s.search(buffer, searchstart)
if match is None:
continue
n = match.start()
if first_match is None or n < first_match:
first_match = n
the_match = match
best_index = index
if first_match is None:
return -1
self.start = first_match
self.match = the_match
self.end = self.match.end()
return best_index

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'''This is like pexpect, but it will work with any file descriptor that you
pass it. You are responsible for opening and close the file descriptor.
This allows you to use Pexpect with sockets and named pipes (FIFOs).
PEXPECT LICENSE
This license is approved by the OSI and FSF as GPL-compatible.
http://opensource.org/licenses/isc-license.txt
Copyright (c) 2012, Noah Spurrier <noah@noah.org>
PERMISSION TO USE, COPY, MODIFY, AND/OR DISTRIBUTE THIS SOFTWARE FOR ANY
PURPOSE WITH OR WITHOUT FEE IS HEREBY GRANTED, PROVIDED THAT THE ABOVE
COPYRIGHT NOTICE AND THIS PERMISSION NOTICE APPEAR IN ALL COPIES.
THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
'''
from .spawnbase import SpawnBase
from .exceptions import ExceptionPexpect, TIMEOUT
from .utils import select_ignore_interrupts, poll_ignore_interrupts
import os
__all__ = ['fdspawn']
class fdspawn(SpawnBase):
'''This is like pexpect.spawn but allows you to supply your own open file
descriptor. For example, you could use it to read through a file looking
for patterns, or to control a modem or serial device. '''
def __init__ (self, fd, args=None, timeout=30, maxread=2000, searchwindowsize=None,
logfile=None, encoding=None, codec_errors='strict', use_poll=False):
'''This takes a file descriptor (an int) or an object that support the
fileno() method (returning an int). All Python file-like objects
support fileno(). '''
if type(fd) != type(0) and hasattr(fd, 'fileno'):
fd = fd.fileno()
if type(fd) != type(0):
raise ExceptionPexpect('The fd argument is not an int. If this is a command string then maybe you want to use pexpect.spawn.')
try: # make sure fd is a valid file descriptor
os.fstat(fd)
except OSError:
raise ExceptionPexpect('The fd argument is not a valid file descriptor.')
self.args = None
self.command = None
SpawnBase.__init__(self, timeout, maxread, searchwindowsize, logfile,
encoding=encoding, codec_errors=codec_errors)
self.child_fd = fd
self.own_fd = False
self.closed = False
self.name = '<file descriptor %d>' % fd
self.use_poll = use_poll
def close (self):
"""Close the file descriptor.
Calling this method a second time does nothing, but if the file
descriptor was closed elsewhere, :class:`OSError` will be raised.
"""
if self.child_fd == -1:
return
self.flush()
os.close(self.child_fd)
self.child_fd = -1
self.closed = True
def isalive (self):
'''This checks if the file descriptor is still valid. If :func:`os.fstat`
does not raise an exception then we assume it is alive. '''
if self.child_fd == -1:
return False
try:
os.fstat(self.child_fd)
return True
except:
return False
def terminate (self, force=False): # pragma: no cover
'''Deprecated and invalid. Just raises an exception.'''
raise ExceptionPexpect('This method is not valid for file descriptors.')
# These four methods are left around for backwards compatibility, but not
# documented as part of fdpexpect. You're encouraged to use os.write
# directly.
def send(self, s):
"Write to fd, return number of bytes written"
s = self._coerce_send_string(s)
self._log(s, 'send')
b = self._encoder.encode(s, final=False)
return os.write(self.child_fd, b)
def sendline(self, s):
"Write to fd with trailing newline, return number of bytes written"
s = self._coerce_send_string(s)
return self.send(s + self.linesep)
def write(self, s):
"Write to fd, return None"
self.send(s)
def writelines(self, sequence):
"Call self.write() for each item in sequence"
for s in sequence:
self.write(s)
def read_nonblocking(self, size=1, timeout=-1):
"""
Read from the file descriptor and return the result as a string.
The read_nonblocking method of :class:`SpawnBase` assumes that a call
to os.read will not block (timeout parameter is ignored). This is not
the case for POSIX file-like objects such as sockets and serial ports.
Use :func:`select.select`, timeout is implemented conditionally for
POSIX systems.
:param int size: Read at most *size* bytes.
:param int timeout: Wait timeout seconds for file descriptor to be
ready to read. When -1 (default), use self.timeout. When 0, poll.
:return: String containing the bytes read
"""
if os.name == 'posix':
if timeout == -1:
timeout = self.timeout
rlist = [self.child_fd]
wlist = []
xlist = []
if self.use_poll:
rlist = poll_ignore_interrupts(rlist, timeout)
else:
rlist, wlist, xlist = select_ignore_interrupts(
rlist, wlist, xlist, timeout
)
if self.child_fd not in rlist:
raise TIMEOUT('Timeout exceeded.')
return super(fdspawn, self).read_nonblocking(size)

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"""Provides an interface like pexpect.spawn interface using subprocess.Popen
"""
import os
import threading
import subprocess
import sys
import time
import signal
import shlex
try:
from queue import Queue, Empty # Python 3
except ImportError:
from Queue import Queue, Empty # Python 2
from .spawnbase import SpawnBase, PY3
from .exceptions import EOF
from .utils import string_types
class PopenSpawn(SpawnBase):
def __init__(self, cmd, timeout=30, maxread=2000, searchwindowsize=None,
logfile=None, cwd=None, env=None, encoding=None,
codec_errors='strict', preexec_fn=None):
super(PopenSpawn, self).__init__(timeout=timeout, maxread=maxread,
searchwindowsize=searchwindowsize, logfile=logfile,
encoding=encoding, codec_errors=codec_errors)
# Note that `SpawnBase` initializes `self.crlf` to `\r\n`
# because the default behaviour for a PTY is to convert
# incoming LF to `\r\n` (see the `onlcr` flag and
# https://stackoverflow.com/a/35887657/5397009). Here we set
# it to `os.linesep` because that is what the spawned
# application outputs by default and `popen` doesn't translate
# anything.
if encoding is None:
self.crlf = os.linesep.encode ("ascii")
else:
self.crlf = self.string_type (os.linesep)
kwargs = dict(bufsize=0, stdin=subprocess.PIPE,
stderr=subprocess.STDOUT, stdout=subprocess.PIPE,
cwd=cwd, preexec_fn=preexec_fn, env=env)
if sys.platform == 'win32':
startupinfo = subprocess.STARTUPINFO()
startupinfo.dwFlags |= subprocess.STARTF_USESHOWWINDOW
kwargs['startupinfo'] = startupinfo
kwargs['creationflags'] = subprocess.CREATE_NEW_PROCESS_GROUP
if isinstance(cmd, string_types) and sys.platform != 'win32':
cmd = shlex.split(cmd, posix=os.name == 'posix')
self.proc = subprocess.Popen(cmd, **kwargs)
self.pid = self.proc.pid
self.closed = False
self._buf = self.string_type()
self._read_queue = Queue()
self._read_thread = threading.Thread(target=self._read_incoming)
self._read_thread.setDaemon(True)
self._read_thread.start()
_read_reached_eof = False
def read_nonblocking(self, size, timeout):
buf = self._buf
if self._read_reached_eof:
# We have already finished reading. Use up any buffered data,
# then raise EOF
if buf:
self._buf = buf[size:]
return buf[:size]
else:
self.flag_eof = True
raise EOF('End Of File (EOF).')
if timeout == -1:
timeout = self.timeout
elif timeout is None:
timeout = 1e6
t0 = time.time()
while (time.time() - t0) < timeout and size and len(buf) < size:
try:
incoming = self._read_queue.get_nowait()
except Empty:
break
else:
if incoming is None:
self._read_reached_eof = True
break
buf += self._decoder.decode(incoming, final=False)
r, self._buf = buf[:size], buf[size:]
self._log(r, 'read')
return r
def _read_incoming(self):
"""Run in a thread to move output from a pipe to a queue."""
fileno = self.proc.stdout.fileno()
while 1:
buf = b''
try:
buf = os.read(fileno, 1024)
except OSError as e:
self._log(e, 'read')
if not buf:
# This indicates we have reached EOF
self._read_queue.put(None)
return
self._read_queue.put(buf)
def write(self, s):
'''This is similar to send() except that there is no return value.
'''
self.send(s)
def writelines(self, sequence):
'''This calls write() for each element in the sequence.
The sequence can be any iterable object producing strings, typically a
list of strings. This does not add line separators. There is no return
value.
'''
for s in sequence:
self.send(s)
def send(self, s):
'''Send data to the subprocess' stdin.
Returns the number of bytes written.
'''
s = self._coerce_send_string(s)
self._log(s, 'send')
b = self._encoder.encode(s, final=False)
if PY3:
return self.proc.stdin.write(b)
else:
# On Python 2, .write() returns None, so we return the length of
# bytes written ourselves. This assumes they all got written.
self.proc.stdin.write(b)
return len(b)
def sendline(self, s=''):
'''Wraps send(), sending string ``s`` to child process, with os.linesep
automatically appended. Returns number of bytes written. '''
n = self.send(s)
return n + self.send(self.linesep)
def wait(self):
'''Wait for the subprocess to finish.
Returns the exit code.
'''
status = self.proc.wait()
if status >= 0:
self.exitstatus = status
self.signalstatus = None
else:
self.exitstatus = None
self.signalstatus = -status
self.terminated = True
return status
def kill(self, sig):
'''Sends a Unix signal to the subprocess.
Use constants from the :mod:`signal` module to specify which signal.
'''
if sys.platform == 'win32':
if sig in [signal.SIGINT, signal.CTRL_C_EVENT]:
sig = signal.CTRL_C_EVENT
elif sig in [signal.SIGBREAK, signal.CTRL_BREAK_EVENT]:
sig = signal.CTRL_BREAK_EVENT
else:
sig = signal.SIGTERM
os.kill(self.proc.pid, sig)
def sendeof(self):
'''Closes the stdin pipe from the writing end.'''
self.proc.stdin.close()

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import os
import sys
import time
import pty
import tty
import errno
import signal
from contextlib import contextmanager
from .ptyprocess import ptyprocess
from .ptyprocess.ptyprocess import use_native_pty_fork
from .exceptions import ExceptionPexpect, EOF, TIMEOUT
from .spawnbase import SpawnBase
from .utils import (
which, split_command_line, select_ignore_interrupts, poll_ignore_interrupts
)
@contextmanager
def _wrap_ptyprocess_err():
"""Turn ptyprocess errors into our own ExceptionPexpect errors"""
try:
yield
except ptyprocess.PtyProcessError as e:
raise ExceptionPexpect(*e.args)
PY3 = (sys.version_info[0] >= 3)
class spawn(SpawnBase):
'''This is the main class interface for Pexpect. Use this class to start
and control child applications. '''
# This is purely informational now - changing it has no effect
use_native_pty_fork = use_native_pty_fork
def __init__(self, command, args=[], timeout=30, maxread=2000,
searchwindowsize=None, logfile=None, cwd=None, env=None,
ignore_sighup=False, echo=True, preexec_fn=None,
encoding=None, codec_errors='strict', dimensions=None,
use_poll=False):
'''This is the constructor. The command parameter may be a string that
includes a command and any arguments to the command. For example::
child = pexpect.spawn('/usr/bin/ftp')
child = pexpect.spawn('/usr/bin/ssh user@example.com')
child = pexpect.spawn('ls -latr /tmp')
You may also construct it with a list of arguments like so::
child = pexpect.spawn('/usr/bin/ftp', [])
child = pexpect.spawn('/usr/bin/ssh', ['user@example.com'])
child = pexpect.spawn('ls', ['-latr', '/tmp'])
After this the child application will be created and will be ready to
talk to. For normal use, see expect() and send() and sendline().
Remember that Pexpect does NOT interpret shell meta characters such as
redirect, pipe, or wild cards (``>``, ``|``, or ``*``). This is a
common mistake. If you want to run a command and pipe it through
another command then you must also start a shell. For example::
child = pexpect.spawn('/bin/bash -c "ls -l | grep LOG > logs.txt"')
child.expect(pexpect.EOF)
The second form of spawn (where you pass a list of arguments) is useful
in situations where you wish to spawn a command and pass it its own
argument list. This can make syntax more clear. For example, the
following is equivalent to the previous example::
shell_cmd = 'ls -l | grep LOG > logs.txt'
child = pexpect.spawn('/bin/bash', ['-c', shell_cmd])
child.expect(pexpect.EOF)
The maxread attribute sets the read buffer size. This is maximum number
of bytes that Pexpect will try to read from a TTY at one time. Setting
the maxread size to 1 will turn off buffering. Setting the maxread
value higher may help performance in cases where large amounts of
output are read back from the child. This feature is useful in
conjunction with searchwindowsize.
When the keyword argument *searchwindowsize* is None (default), the
full buffer is searched at each iteration of receiving incoming data.
The default number of bytes scanned at each iteration is very large
and may be reduced to collaterally reduce search cost. After
:meth:`~.expect` returns, the full buffer attribute remains up to
size *maxread* irrespective of *searchwindowsize* value.
When the keyword argument ``timeout`` is specified as a number,
(default: *30*), then :class:`TIMEOUT` will be raised after the value
specified has elapsed, in seconds, for any of the :meth:`~.expect`
family of method calls. When None, TIMEOUT will not be raised, and
:meth:`~.expect` may block indefinitely until match.
The logfile member turns on or off logging. All input and output will
be copied to the given file object. Set logfile to None to stop
logging. This is the default. Set logfile to sys.stdout to echo
everything to standard output. The logfile is flushed after each write.
Example log input and output to a file::
child = pexpect.spawn('some_command')
fout = open('mylog.txt','wb')
child.logfile = fout
Example log to stdout::
# In Python 2:
child = pexpect.spawn('some_command')
child.logfile = sys.stdout
# In Python 3, we'll use the ``encoding`` argument to decode data
# from the subprocess and handle it as unicode:
child = pexpect.spawn('some_command', encoding='utf-8')
child.logfile = sys.stdout
The logfile_read and logfile_send members can be used to separately log
the input from the child and output sent to the child. Sometimes you
don't want to see everything you write to the child. You only want to
log what the child sends back. For example::
child = pexpect.spawn('some_command')
child.logfile_read = sys.stdout
You will need to pass an encoding to spawn in the above code if you are
using Python 3.
To separately log output sent to the child use logfile_send::
child.logfile_send = fout
If ``ignore_sighup`` is True, the child process will ignore SIGHUP
signals. The default is False from Pexpect 4.0, meaning that SIGHUP
will be handled normally by the child.
The delaybeforesend helps overcome a weird behavior that many users
were experiencing. The typical problem was that a user would expect() a
"Password:" prompt and then immediately call sendline() to send the
password. The user would then see that their password was echoed back
to them. Passwords don't normally echo. The problem is caused by the
fact that most applications print out the "Password" prompt and then
turn off stdin echo, but if you send your password before the
application turned off echo, then you get your password echoed.
Normally this wouldn't be a problem when interacting with a human at a
real keyboard. If you introduce a slight delay just before writing then
this seems to clear up the problem. This was such a common problem for
many users that I decided that the default pexpect behavior should be
to sleep just before writing to the child application. 1/20th of a
second (50 ms) seems to be enough to clear up the problem. You can set
delaybeforesend to None to return to the old behavior.
Note that spawn is clever about finding commands on your path.
It uses the same logic that "which" uses to find executables.
If you wish to get the exit status of the child you must call the
close() method. The exit or signal status of the child will be stored
in self.exitstatus or self.signalstatus. If the child exited normally
then exitstatus will store the exit return code and signalstatus will
be None. If the child was terminated abnormally with a signal then
signalstatus will store the signal value and exitstatus will be None::
child = pexpect.spawn('some_command')
child.close()
print(child.exitstatus, child.signalstatus)
If you need more detail you can also read the self.status member which
stores the status returned by os.waitpid. You can interpret this using
os.WIFEXITED/os.WEXITSTATUS or os.WIFSIGNALED/os.TERMSIG.
The echo attribute may be set to False to disable echoing of input.
As a pseudo-terminal, all input echoed by the "keyboard" (send()
or sendline()) will be repeated to output. For many cases, it is
not desirable to have echo enabled, and it may be later disabled
using setecho(False) followed by waitnoecho(). However, for some
platforms such as Solaris, this is not possible, and should be
disabled immediately on spawn.
If preexec_fn is given, it will be called in the child process before
launching the given command. This is useful to e.g. reset inherited
signal handlers.
The dimensions attribute specifies the size of the pseudo-terminal as
seen by the subprocess, and is specified as a two-entry tuple (rows,
columns). If this is unspecified, the defaults in ptyprocess will apply.
The use_poll attribute enables using select.poll() over select.select()
for socket handling. This is handy if your system could have > 1024 fds
'''
super(spawn, self).__init__(timeout=timeout, maxread=maxread, searchwindowsize=searchwindowsize,
logfile=logfile, encoding=encoding, codec_errors=codec_errors)
self.STDIN_FILENO = pty.STDIN_FILENO
self.STDOUT_FILENO = pty.STDOUT_FILENO
self.STDERR_FILENO = pty.STDERR_FILENO
self.str_last_chars = 100
self.cwd = cwd
self.env = env
self.echo = echo
self.ignore_sighup = ignore_sighup
self.__irix_hack = sys.platform.lower().startswith('irix')
if command is None:
self.command = None
self.args = None
self.name = '<pexpect factory incomplete>'
else:
self._spawn(command, args, preexec_fn, dimensions)
self.use_poll = use_poll
def __str__(self):
'''This returns a human-readable string that represents the state of
the object. '''
s = []
s.append(repr(self))
s.append('command: ' + str(self.command))
s.append('args: %r' % (self.args,))
s.append('buffer (last %s chars): %r' % (self.str_last_chars,self.buffer[-self.str_last_chars:]))
s.append('before (last %s chars): %r' % (self.str_last_chars,self.before[-self.str_last_chars:] if self.before else ''))
s.append('after: %r' % (self.after,))
s.append('match: %r' % (self.match,))
s.append('match_index: ' + str(self.match_index))
s.append('exitstatus: ' + str(self.exitstatus))
if hasattr(self, 'ptyproc'):
s.append('flag_eof: ' + str(self.flag_eof))
s.append('pid: ' + str(self.pid))
s.append('child_fd: ' + str(self.child_fd))
s.append('closed: ' + str(self.closed))
s.append('timeout: ' + str(self.timeout))
s.append('delimiter: ' + str(self.delimiter))
s.append('logfile: ' + str(self.logfile))
s.append('logfile_read: ' + str(self.logfile_read))
s.append('logfile_send: ' + str(self.logfile_send))
s.append('maxread: ' + str(self.maxread))
s.append('ignorecase: ' + str(self.ignorecase))
s.append('searchwindowsize: ' + str(self.searchwindowsize))
s.append('delaybeforesend: ' + str(self.delaybeforesend))
s.append('delayafterclose: ' + str(self.delayafterclose))
s.append('delayafterterminate: ' + str(self.delayafterterminate))
return '\n'.join(s)
def _spawn(self, command, args=[], preexec_fn=None, dimensions=None):
'''This starts the given command in a child process. This does all the
fork/exec type of stuff for a pty. This is called by __init__. If args
is empty then command will be parsed (split on spaces) and args will be
set to parsed arguments. '''
# The pid and child_fd of this object get set by this method.
# Note that it is difficult for this method to fail.
# You cannot detect if the child process cannot start.
# So the only way you can tell if the child process started
# or not is to try to read from the file descriptor. If you get
# EOF immediately then it means that the child is already dead.
# That may not necessarily be bad because you may have spawned a child
# that performs some task; creates no stdout output; and then dies.
# If command is an int type then it may represent a file descriptor.
if isinstance(command, type(0)):
raise ExceptionPexpect('Command is an int type. ' +
'If this is a file descriptor then maybe you want to ' +
'use fdpexpect.fdspawn which takes an existing ' +
'file descriptor instead of a command string.')
if not isinstance(args, type([])):
raise TypeError('The argument, args, must be a list.')
if args == []:
self.args = split_command_line(command)
self.command = self.args[0]
else:
# Make a shallow copy of the args list.
self.args = args[:]
self.args.insert(0, command)
self.command = command
command_with_path = which(self.command, env=self.env)
if command_with_path is None:
raise ExceptionPexpect('The command was not found or was not ' +
'executable: %s.' % self.command)
self.command = command_with_path
self.args[0] = self.command
self.name = '<' + ' '.join(self.args) + '>'
assert self.pid is None, 'The pid member must be None.'
assert self.command is not None, 'The command member must not be None.'
kwargs = {'echo': self.echo, 'preexec_fn': preexec_fn}
if self.ignore_sighup:
def preexec_wrapper():
"Set SIGHUP to be ignored, then call the real preexec_fn"
signal.signal(signal.SIGHUP, signal.SIG_IGN)
if preexec_fn is not None:
preexec_fn()
kwargs['preexec_fn'] = preexec_wrapper
if dimensions is not None:
kwargs['dimensions'] = dimensions
if self.encoding is not None:
# Encode command line using the specified encoding
self.args = [a if isinstance(a, bytes) else a.encode(self.encoding)
for a in self.args]
self.ptyproc = self._spawnpty(self.args, env=self.env,
cwd=self.cwd, **kwargs)
self.pid = self.ptyproc.pid
self.child_fd = self.ptyproc.fd
self.terminated = False
self.closed = False
def _spawnpty(self, args, **kwargs):
'''Spawn a pty and return an instance of PtyProcess.'''
return ptyprocess.PtyProcess.spawn(args, **kwargs)
def close(self, force=True):
'''This closes the connection with the child application. Note that
calling close() more than once is valid. This emulates standard Python
behavior with files. Set force to True if you want to make sure that
the child is terminated (SIGKILL is sent if the child ignores SIGHUP
and SIGINT). '''
self.flush()
with _wrap_ptyprocess_err():
# PtyProcessError may be raised if it is not possible to terminate
# the child.
self.ptyproc.close(force=force)
self.isalive() # Update exit status from ptyproc
self.child_fd = -1
self.closed = True
def isatty(self):
'''This returns True if the file descriptor is open and connected to a
tty(-like) device, else False.
On SVR4-style platforms implementing streams, such as SunOS and HP-UX,
the child pty may not appear as a terminal device. This means
methods such as setecho(), setwinsize(), getwinsize() may raise an
IOError. '''
return os.isatty(self.child_fd)
def waitnoecho(self, timeout=-1):
'''This waits until the terminal ECHO flag is set False. This returns
True if the echo mode is off. This returns False if the ECHO flag was
not set False before the timeout. This can be used to detect when the
child is waiting for a password. Usually a child application will turn
off echo mode when it is waiting for the user to enter a password. For
example, instead of expecting the "password:" prompt you can wait for
the child to set ECHO off::
p = pexpect.spawn('ssh user@example.com')
p.waitnoecho()
p.sendline(mypassword)
If timeout==-1 then this method will use the value in self.timeout.
If timeout==None then this method to block until ECHO flag is False.
'''
if timeout == -1:
timeout = self.timeout
if timeout is not None:
end_time = time.time() + timeout
while True:
if not self.getecho():
return True
if timeout < 0 and timeout is not None:
return False
if timeout is not None:
timeout = end_time - time.time()
time.sleep(0.1)
def getecho(self):
'''This returns the terminal echo mode. This returns True if echo is
on or False if echo is off. Child applications that are expecting you
to enter a password often set ECHO False. See waitnoecho().
Not supported on platforms where ``isatty()`` returns False. '''
return self.ptyproc.getecho()
def setecho(self, state):
'''This sets the terminal echo mode on or off. Note that anything the
child sent before the echo will be lost, so you should be sure that
your input buffer is empty before you call setecho(). For example, the
following will work as expected::
p = pexpect.spawn('cat') # Echo is on by default.
p.sendline('1234') # We expect see this twice from the child...
p.expect(['1234']) # ... once from the tty echo...
p.expect(['1234']) # ... and again from cat itself.
p.setecho(False) # Turn off tty echo
p.sendline('abcd') # We will set this only once (echoed by cat).
p.sendline('wxyz') # We will set this only once (echoed by cat)
p.expect(['abcd'])
p.expect(['wxyz'])
The following WILL NOT WORK because the lines sent before the setecho
will be lost::
p = pexpect.spawn('cat')
p.sendline('1234')
p.setecho(False) # Turn off tty echo
p.sendline('abcd') # We will set this only once (echoed by cat).
p.sendline('wxyz') # We will set this only once (echoed by cat)
p.expect(['1234'])
p.expect(['1234'])
p.expect(['abcd'])
p.expect(['wxyz'])
Not supported on platforms where ``isatty()`` returns False.
'''
return self.ptyproc.setecho(state)
def read_nonblocking(self, size=1, timeout=-1):
'''This reads at most size characters from the child application. It
includes a timeout. If the read does not complete within the timeout
period then a TIMEOUT exception is raised. If the end of file is read
then an EOF exception will be raised. If a logfile is specified, a
copy is written to that log.
If timeout is None then the read may block indefinitely.
If timeout is -1 then the self.timeout value is used. If timeout is 0
then the child is polled and if there is no data immediately ready
then this will raise a TIMEOUT exception.
The timeout refers only to the amount of time to read at least one
character. This is not affected by the 'size' parameter, so if you call
read_nonblocking(size=100, timeout=30) and only one character is
available right away then one character will be returned immediately.
It will not wait for 30 seconds for another 99 characters to come in.
On the other hand, if there are bytes available to read immediately,
all those bytes will be read (up to the buffer size). So, if the
buffer size is 1 megabyte and there is 1 megabyte of data available
to read, the buffer will be filled, regardless of timeout.
This is a wrapper around os.read(). It uses select.select() or
select.poll() to implement the timeout. '''
if self.closed:
raise ValueError('I/O operation on closed file.')
if self.use_poll:
def select(timeout):
return poll_ignore_interrupts([self.child_fd], timeout)
else:
def select(timeout):
return select_ignore_interrupts([self.child_fd], [], [], timeout)[0]
# If there is data available to read right now, read as much as
# we can. We do this to increase performance if there are a lot
# of bytes to be read. This also avoids calling isalive() too
# often. See also:
# * https://github.com/pexpect/pexpect/pull/304
# * http://trac.sagemath.org/ticket/10295
if select(0):
try:
incoming = super(spawn, self).read_nonblocking(size)
except EOF:
# Maybe the child is dead: update some attributes in that case
self.isalive()
raise
while len(incoming) < size and select(0):
try:
incoming += super(spawn, self).read_nonblocking(size - len(incoming))
except EOF:
# Maybe the child is dead: update some attributes in that case
self.isalive()
# Don't raise EOF, just return what we read so far.
return incoming
return incoming
if timeout == -1:
timeout = self.timeout
if not self.isalive():
# The process is dead, but there may or may not be data
# available to read. Note that some systems such as Solaris
# do not give an EOF when the child dies. In fact, you can
# still try to read from the child_fd -- it will block
# forever or until TIMEOUT. For that reason, it's important
# to do this check before calling select() with timeout.
if select(0):
return super(spawn, self).read_nonblocking(size)
self.flag_eof = True
raise EOF('End Of File (EOF). Braindead platform.')
elif self.__irix_hack:
# Irix takes a long time before it realizes a child was terminated.
# Make sure that the timeout is at least 2 seconds.
# FIXME So does this mean Irix systems are forced to always have
# FIXME a 2 second delay when calling read_nonblocking? That sucks.
if timeout is not None and timeout < 2:
timeout = 2
# Because of the select(0) check above, we know that no data
# is available right now. But if a non-zero timeout is given
# (possibly timeout=None), we call select() with a timeout.
if (timeout != 0) and select(timeout):
return super(spawn, self).read_nonblocking(size)
if not self.isalive():
# Some platforms, such as Irix, will claim that their
# processes are alive; timeout on the select; and
# then finally admit that they are not alive.
self.flag_eof = True
raise EOF('End of File (EOF). Very slow platform.')
else:
raise TIMEOUT('Timeout exceeded.')
def write(self, s):
'''This is similar to send() except that there is no return value.
'''
self.send(s)
def writelines(self, sequence):
'''This calls write() for each element in the sequence. The sequence
can be any iterable object producing strings, typically a list of
strings. This does not add line separators. There is no return value.
'''
for s in sequence:
self.write(s)
def send(self, s):
'''Sends string ``s`` to the child process, returning the number of
bytes written. If a logfile is specified, a copy is written to that
log.
The default terminal input mode is canonical processing unless set
otherwise by the child process. This allows backspace and other line
processing to be performed prior to transmitting to the receiving
program. As this is buffered, there is a limited size of such buffer.
On Linux systems, this is 4096 (defined by N_TTY_BUF_SIZE). All
other systems honor the POSIX.1 definition PC_MAX_CANON -- 1024
on OSX, 256 on OpenSolaris, and 1920 on FreeBSD.
This value may be discovered using fpathconf(3)::
>>> from os import fpathconf
>>> print(fpathconf(0, 'PC_MAX_CANON'))
256
On such a system, only 256 bytes may be received per line. Any
subsequent bytes received will be discarded. BEL (``'\a'``) is then
sent to output if IMAXBEL (termios.h) is set by the tty driver.
This is usually enabled by default. Linux does not honor this as
an option -- it behaves as though it is always set on.
Canonical input processing may be disabled altogether by executing
a shell, then stty(1), before executing the final program::
>>> bash = pexpect.spawn('/bin/bash', echo=False)
>>> bash.sendline('stty -icanon')
>>> bash.sendline('base64')
>>> bash.sendline('x' * 5000)
'''
if self.delaybeforesend is not None:
time.sleep(self.delaybeforesend)
s = self._coerce_send_string(s)
self._log(s, 'send')
b = self._encoder.encode(s, final=False)
return os.write(self.child_fd, b)
def sendline(self, s=''):
'''Wraps send(), sending string ``s`` to child process, with
``os.linesep`` automatically appended. Returns number of bytes
written. Only a limited number of bytes may be sent for each
line in the default terminal mode, see docstring of :meth:`send`.
'''
s = self._coerce_send_string(s)
return self.send(s + self.linesep)
def _log_control(self, s):
"""Write control characters to the appropriate log files"""
if self.encoding is not None:
s = s.decode(self.encoding, 'replace')
self._log(s, 'send')
def sendcontrol(self, char):
'''Helper method that wraps send() with mnemonic access for sending control
character to the child (such as Ctrl-C or Ctrl-D). For example, to send
Ctrl-G (ASCII 7, bell, '\a')::
child.sendcontrol('g')
See also, sendintr() and sendeof().
'''
n, byte = self.ptyproc.sendcontrol(char)
self._log_control(byte)
return n
def sendeof(self):
'''This sends an EOF to the child. This sends a character which causes
the pending parent output buffer to be sent to the waiting child
program without waiting for end-of-line. If it is the first character
of the line, the read() in the user program returns 0, which signifies
end-of-file. This means to work as expected a sendeof() has to be
called at the beginning of a line. This method does not send a newline.
It is the responsibility of the caller to ensure the eof is sent at the
beginning of a line. '''
n, byte = self.ptyproc.sendeof()
self._log_control(byte)
def sendintr(self):
'''This sends a SIGINT to the child. It does not require
the SIGINT to be the first character on a line. '''
n, byte = self.ptyproc.sendintr()
self._log_control(byte)
@property
def flag_eof(self):
return self.ptyproc.flag_eof
@flag_eof.setter
def flag_eof(self, value):
self.ptyproc.flag_eof = value
def eof(self):
'''This returns True if the EOF exception was ever raised.
'''
return self.flag_eof
def terminate(self, force=False):
'''This forces a child process to terminate. It starts nicely with
SIGHUP and SIGINT. If "force" is True then moves onto SIGKILL. This
returns True if the child was terminated. This returns False if the
child could not be terminated. '''
if not self.isalive():
return True
try:
self.kill(signal.SIGHUP)
time.sleep(self.delayafterterminate)
if not self.isalive():
return True
self.kill(signal.SIGCONT)
time.sleep(self.delayafterterminate)
if not self.isalive():
return True
self.kill(signal.SIGINT)
time.sleep(self.delayafterterminate)
if not self.isalive():
return True
if force:
self.kill(signal.SIGKILL)
time.sleep(self.delayafterterminate)
if not self.isalive():
return True
else:
return False
return False
except OSError:
# I think there are kernel timing issues that sometimes cause
# this to happen. I think isalive() reports True, but the
# process is dead to the kernel.
# Make one last attempt to see if the kernel is up to date.
time.sleep(self.delayafterterminate)
if not self.isalive():
return True
else:
return False
def wait(self):
'''This waits until the child exits. This is a blocking call. This will
not read any data from the child, so this will block forever if the
child has unread output and has terminated. In other words, the child
may have printed output then called exit(), but, the child is
technically still alive until its output is read by the parent.
This method is non-blocking if :meth:`wait` has already been called
previously or :meth:`isalive` method returns False. It simply returns
the previously determined exit status.
'''
ptyproc = self.ptyproc
with _wrap_ptyprocess_err():
# exception may occur if "Is some other process attempting
# "job control with our child pid?"
exitstatus = ptyproc.wait()
self.status = ptyproc.status
self.exitstatus = ptyproc.exitstatus
self.signalstatus = ptyproc.signalstatus
self.terminated = True
return exitstatus
def isalive(self):
'''This tests if the child process is running or not. This is
non-blocking. If the child was terminated then this will read the
exitstatus or signalstatus of the child. This returns True if the child
process appears to be running or False if not. It can take literally
SECONDS for Solaris to return the right status. '''
ptyproc = self.ptyproc
with _wrap_ptyprocess_err():
alive = ptyproc.isalive()
if not alive:
self.status = ptyproc.status
self.exitstatus = ptyproc.exitstatus
self.signalstatus = ptyproc.signalstatus
self.terminated = True
return alive
def kill(self, sig):
'''This sends the given signal to the child application. In keeping
with UNIX tradition it has a misleading name. It does not necessarily
kill the child unless you send the right signal. '''
# Same as os.kill, but the pid is given for you.
if self.isalive():
os.kill(self.pid, sig)
def getwinsize(self):
'''This returns the terminal window size of the child tty. The return
value is a tuple of (rows, cols). '''
return self.ptyproc.getwinsize()
def setwinsize(self, rows, cols):
'''This sets the terminal window size of the child tty. This will cause
a SIGWINCH signal to be sent to the child. This does not change the
physical window size. It changes the size reported to TTY-aware
applications like vi or curses -- applications that respond to the
SIGWINCH signal. '''
return self.ptyproc.setwinsize(rows, cols)
def interact(self, escape_character=chr(29),
input_filter=None, output_filter=None):
'''This gives control of the child process to the interactive user (the
human at the keyboard). Keystrokes are sent to the child process, and
the stdout and stderr output of the child process is printed. This
simply echos the child stdout and child stderr to the real stdout and
it echos the real stdin to the child stdin. When the user types the
escape_character this method will return None. The escape_character
will not be transmitted. The default for escape_character is
entered as ``Ctrl - ]``, the very same as BSD telnet. To prevent
escaping, escape_character may be set to None.
If a logfile is specified, then the data sent and received from the
child process in interact mode is duplicated to the given log.
You may pass in optional input and output filter functions. These
functions should take bytes array and return bytes array too. Even
with ``encoding='utf-8'`` support, meth:`interact` will always pass
input_filter and output_filter bytes. You may need to wrap your
function to decode and encode back to UTF-8.
The output_filter will be passed all the output from the child process.
The input_filter will be passed all the keyboard input from the user.
The input_filter is run BEFORE the check for the escape_character.
Note that if you change the window size of the parent the SIGWINCH
signal will not be passed through to the child. If you want the child
window size to change when the parent's window size changes then do
something like the following example::
import pexpect, struct, fcntl, termios, signal, sys
def sigwinch_passthrough (sig, data):
s = struct.pack("HHHH", 0, 0, 0, 0)
a = struct.unpack('hhhh', fcntl.ioctl(sys.stdout.fileno(),
termios.TIOCGWINSZ , s))
if not p.closed:
p.setwinsize(a[0],a[1])
# Note this 'p' is global and used in sigwinch_passthrough.
p = pexpect.spawn('/bin/bash')
signal.signal(signal.SIGWINCH, sigwinch_passthrough)
p.interact()
'''
# Flush the buffer.
self.write_to_stdout(self.buffer)
self.stdout.flush()
self._buffer = self.buffer_type()
mode = tty.tcgetattr(self.STDIN_FILENO)
tty.setraw(self.STDIN_FILENO)
if escape_character is not None and PY3:
escape_character = escape_character.encode('latin-1')
try:
self.__interact_copy(escape_character, input_filter, output_filter)
finally:
tty.tcsetattr(self.STDIN_FILENO, tty.TCSAFLUSH, mode)
def __interact_writen(self, fd, data):
'''This is used by the interact() method.
'''
while data != b'' and self.isalive():
n = os.write(fd, data)
data = data[n:]
def __interact_read(self, fd):
'''This is used by the interact() method.
'''
return os.read(fd, 1000)
def __interact_copy(
self, escape_character=None, input_filter=None, output_filter=None
):
'''This is used by the interact() method.
'''
while self.isalive():
if self.use_poll:
r = poll_ignore_interrupts([self.child_fd, self.STDIN_FILENO])
else:
r, w, e = select_ignore_interrupts(
[self.child_fd, self.STDIN_FILENO], [], []
)
if self.child_fd in r:
try:
data = self.__interact_read(self.child_fd)
except OSError as err:
if err.args[0] == errno.EIO:
# Linux-style EOF
break
raise
if data == b'':
# BSD-style EOF
break
if output_filter:
data = output_filter(data)
self._log(data, 'read')
os.write(self.STDOUT_FILENO, data)
if self.STDIN_FILENO in r:
data = self.__interact_read(self.STDIN_FILENO)
if input_filter:
data = input_filter(data)
i = -1
if escape_character is not None:
i = data.rfind(escape_character)
if i != -1:
data = data[:i]
if data:
self._log(data, 'send')
self.__interact_writen(self.child_fd, data)
break
self._log(data, 'send')
self.__interact_writen(self.child_fd, data)
def spawnu(*args, **kwargs):
"""Deprecated: pass encoding to spawn() instead."""
kwargs.setdefault('encoding', 'utf-8')
return spawn(*args, **kwargs)

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ISC LICENSE
This license is approved by the OSI and FSF as GPL-compatible.
http://opensource.org/licenses/isc-license.txt
Copyright (c) 2013-2014, Pexpect development team
Copyright (c) 2012, Noah Spurrier <noah@noah.org>
Permission to use, copy, modify, and/or distribute this software for any
purpose with or without fee is hereby granted, provided that the above
copyright notice and this permission notice appear in all copies.
THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

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"""Run a subprocess in a pseudo terminal"""
from .ptyprocess import PtyProcess, PtyProcessUnicode, PtyProcessError
__version__ = '0.7.0'

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"""Substitute for the forkpty system call, to support Solaris.
"""
import os
import errno
from pty import (STDIN_FILENO, STDOUT_FILENO, STDERR_FILENO, CHILD)
from .util import PtyProcessError
def fork_pty():
'''This implements a substitute for the forkpty system call. This
should be more portable than the pty.fork() function. Specifically,
this should work on Solaris.
Modified 10.06.05 by Geoff Marshall: Implemented __fork_pty() method to
resolve the issue with Python's pty.fork() not supporting Solaris,
particularly ssh. Based on patch to posixmodule.c authored by Noah
Spurrier::
http://mail.python.org/pipermail/python-dev/2003-May/035281.html
'''
parent_fd, child_fd = os.openpty()
if parent_fd < 0 or child_fd < 0:
raise OSError("os.openpty() failed")
pid = os.fork()
if pid == CHILD:
# Child.
os.close(parent_fd)
pty_make_controlling_tty(child_fd)
os.dup2(child_fd, STDIN_FILENO)
os.dup2(child_fd, STDOUT_FILENO)
os.dup2(child_fd, STDERR_FILENO)
else:
# Parent.
os.close(child_fd)
return pid, parent_fd
def pty_make_controlling_tty(tty_fd):
'''This makes the pseudo-terminal the controlling tty. This should be
more portable than the pty.fork() function. Specifically, this should
work on Solaris. '''
child_name = os.ttyname(tty_fd)
# Disconnect from controlling tty, if any. Raises OSError of ENXIO
# if there was no controlling tty to begin with, such as when
# executed by a cron(1) job.
try:
fd = os.open("/dev/tty", os.O_RDWR | os.O_NOCTTY)
os.close(fd)
except OSError as err:
if err.errno != errno.ENXIO:
raise
os.setsid()
# Verify we are disconnected from controlling tty by attempting to open
# it again. We expect that OSError of ENXIO should always be raised.
try:
fd = os.open("/dev/tty", os.O_RDWR | os.O_NOCTTY)
os.close(fd)
raise PtyProcessError("OSError of errno.ENXIO should be raised.")
except OSError as err:
if err.errno != errno.ENXIO:
raise
# Verify we can open child pty.
fd = os.open(child_name, os.O_RDWR)
os.close(fd)
# Verify we now have a controlling tty.
fd = os.open("/dev/tty", os.O_WRONLY)
os.close(fd)

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import codecs
import errno
import fcntl
import io
import os
import pty
import resource
import signal
import struct
import sys
import termios
import time
try:
import builtins # Python 3
except ImportError:
import __builtin__ as builtins # Python 2
# Constants
from pty import (STDIN_FILENO, CHILD)
from .util import which, PtyProcessError
_platform = sys.platform.lower()
# Solaris uses internal __fork_pty(). All others use pty.fork().
_is_solaris = (
_platform.startswith('solaris') or
_platform.startswith('sunos'))
if _is_solaris:
use_native_pty_fork = False
from . import _fork_pty
else:
use_native_pty_fork = True
PY3 = sys.version_info[0] >= 3
if PY3:
def _byte(i):
return bytes([i])
else:
def _byte(i):
return chr(i)
class FileNotFoundError(OSError): pass
class TimeoutError(OSError): pass
_EOF, _INTR = None, None
def _make_eof_intr():
"""Set constants _EOF and _INTR.
This avoids doing potentially costly operations on module load.
"""
global _EOF, _INTR
if (_EOF is not None) and (_INTR is not None):
return
# inherit EOF and INTR definitions from controlling process.
try:
from termios import VEOF, VINTR
fd = None
for name in 'stdin', 'stdout':
stream = getattr(sys, '__%s__' % name, None)
if stream is None or not hasattr(stream, 'fileno'):
continue
try:
fd = stream.fileno()
except ValueError:
continue
if fd is None:
# no fd, raise ValueError to fallback on CEOF, CINTR
raise ValueError("No stream has a fileno")
intr = ord(termios.tcgetattr(fd)[6][VINTR])
eof = ord(termios.tcgetattr(fd)[6][VEOF])
except (ImportError, OSError, IOError, ValueError, termios.error):
# unless the controlling process is also not a terminal,
# such as cron(1), or when stdin and stdout are both closed.
# Fall-back to using CEOF and CINTR. There
try:
from termios import CEOF, CINTR
(intr, eof) = (CINTR, CEOF)
except ImportError:
# ^C, ^D
(intr, eof) = (3, 4)
_INTR = _byte(intr)
_EOF = _byte(eof)
# setecho and setwinsize are pulled out here because on some platforms, we need
# to do this from the child before we exec()
def _setecho(fd, state):
errmsg = 'setecho() may not be called on this platform (it may still be possible to enable/disable echo when spawning the child process)'
try:
attr = termios.tcgetattr(fd)
except termios.error as err:
if err.args[0] == errno.EINVAL:
raise IOError(err.args[0], '%s: %s.' % (err.args[1], errmsg))
raise
if state:
attr[3] = attr[3] | termios.ECHO
else:
attr[3] = attr[3] & ~termios.ECHO
try:
# I tried TCSADRAIN and TCSAFLUSH, but these were inconsistent and
# blocked on some platforms. TCSADRAIN would probably be ideal.
termios.tcsetattr(fd, termios.TCSANOW, attr)
except IOError as err:
if err.args[0] == errno.EINVAL:
raise IOError(err.args[0], '%s: %s.' % (err.args[1], errmsg))
raise
def _setwinsize(fd, rows, cols):
# Some very old platforms have a bug that causes the value for
# termios.TIOCSWINSZ to be truncated. There was a hack here to work
# around this, but it caused problems with newer platforms so has been
# removed. For details see https://github.com/pexpect/pexpect/issues/39
TIOCSWINSZ = getattr(termios, 'TIOCSWINSZ', -2146929561)
# Note, assume ws_xpixel and ws_ypixel are zero.
s = struct.pack('HHHH', rows, cols, 0, 0)
fcntl.ioctl(fd, TIOCSWINSZ, s)
class PtyProcess(object):
'''This class represents a process running in a pseudoterminal.
The main constructor is the :meth:`spawn` classmethod.
'''
string_type = bytes
if PY3:
linesep = os.linesep.encode('ascii')
crlf = '\r\n'.encode('ascii')
@staticmethod
def write_to_stdout(b):
try:
return sys.stdout.buffer.write(b)
except AttributeError:
# If stdout has been replaced, it may not have .buffer
return sys.stdout.write(b.decode('ascii', 'replace'))
else:
linesep = os.linesep
crlf = '\r\n'
write_to_stdout = sys.stdout.write
encoding = None
argv = None
env = None
launch_dir = None
def __init__(self, pid, fd):
_make_eof_intr() # Ensure _EOF and _INTR are calculated
self.pid = pid
self.fd = fd
readf = io.open(fd, 'rb', buffering=0)
writef = io.open(fd, 'wb', buffering=0, closefd=False)
self.fileobj = io.BufferedRWPair(readf, writef)
self.terminated = False
self.closed = False
self.exitstatus = None
self.signalstatus = None
# status returned by os.waitpid
self.status = None
self.flag_eof = False
# Used by close() to give kernel time to update process status.
# Time in seconds.
self.delayafterclose = 0.1
# Used by terminate() to give kernel time to update process status.
# Time in seconds.
self.delayafterterminate = 0.1
@classmethod
def spawn(
cls, argv, cwd=None, env=None, echo=True, preexec_fn=None,
dimensions=(24, 80), pass_fds=()):
'''Start the given command in a child process in a pseudo terminal.
This does all the fork/exec type of stuff for a pty, and returns an
instance of PtyProcess.
If preexec_fn is supplied, it will be called with no arguments in the
child process before exec-ing the specified command.
It may, for instance, set signal handlers to SIG_DFL or SIG_IGN.
Dimensions of the psuedoterminal used for the subprocess can be
specified as a tuple (rows, cols), or the default (24, 80) will be used.
By default, all file descriptors except 0, 1 and 2 are closed. This
behavior can be overridden with pass_fds, a list of file descriptors to
keep open between the parent and the child.
'''
# Note that it is difficult for this method to fail.
# You cannot detect if the child process cannot start.
# So the only way you can tell if the child process started
# or not is to try to read from the file descriptor. If you get
# EOF immediately then it means that the child is already dead.
# That may not necessarily be bad because you may have spawned a child
# that performs some task; creates no stdout output; and then dies.
if not isinstance(argv, (list, tuple)):
raise TypeError("Expected a list or tuple for argv, got %r" % argv)
# Shallow copy of argv so we can modify it
argv = argv[:]
command = argv[0]
command_with_path = which(command)
if command_with_path is None:
raise FileNotFoundError('The command was not found or was not ' +
'executable: %s.' % command)
command = command_with_path
argv[0] = command
# [issue #119] To prevent the case where exec fails and the user is
# stuck interacting with a python child process instead of whatever
# was expected, we implement the solution from
# http://stackoverflow.com/a/3703179 to pass the exception to the
# parent process
# [issue #119] 1. Before forking, open a pipe in the parent process.
exec_err_pipe_read, exec_err_pipe_write = os.pipe()
if use_native_pty_fork:
pid, fd = pty.fork()
else:
# Use internal fork_pty, for Solaris
pid, fd = _fork_pty.fork_pty()
# Some platforms must call setwinsize() and setecho() from the
# child process, and others from the master process. We do both,
# allowing IOError for either.
if pid == CHILD:
# set window size
try:
_setwinsize(STDIN_FILENO, *dimensions)
except IOError as err:
if err.args[0] not in (errno.EINVAL, errno.ENOTTY):
raise
# disable echo if spawn argument echo was unset
if not echo:
try:
_setecho(STDIN_FILENO, False)
except (IOError, termios.error) as err:
if err.args[0] not in (errno.EINVAL, errno.ENOTTY):
raise
# [issue #119] 3. The child closes the reading end and sets the
# close-on-exec flag for the writing end.
os.close(exec_err_pipe_read)
fcntl.fcntl(exec_err_pipe_write, fcntl.F_SETFD, fcntl.FD_CLOEXEC)
# Do not allow child to inherit open file descriptors from parent,
# with the exception of the exec_err_pipe_write of the pipe
# and pass_fds.
# Impose ceiling on max_fd: AIX bugfix for users with unlimited
# nofiles where resource.RLIMIT_NOFILE is 2^63-1 and os.closerange()
# occasionally raises out of range error
max_fd = min(1048576, resource.getrlimit(resource.RLIMIT_NOFILE)[0])
spass_fds = sorted(set(pass_fds) | {exec_err_pipe_write})
for pair in zip([2] + spass_fds, spass_fds + [max_fd]):
os.closerange(pair[0]+1, pair[1])
if cwd is not None:
os.chdir(cwd)
if preexec_fn is not None:
try:
preexec_fn()
except Exception as e:
ename = type(e).__name__
tosend = '{}:0:{}'.format(ename, str(e))
if PY3:
tosend = tosend.encode('utf-8')
os.write(exec_err_pipe_write, tosend)
os.close(exec_err_pipe_write)
os._exit(1)
try:
if env is None:
os.execv(command, argv)
else:
os.execvpe(command, argv, env)
except OSError as err:
# [issue #119] 5. If exec fails, the child writes the error
# code back to the parent using the pipe, then exits.
tosend = 'OSError:{}:{}'.format(err.errno, str(err))
if PY3:
tosend = tosend.encode('utf-8')
os.write(exec_err_pipe_write, tosend)
os.close(exec_err_pipe_write)
os._exit(os.EX_OSERR)
# Parent
inst = cls(pid, fd)
# Set some informational attributes
inst.argv = argv
if env is not None:
inst.env = env
if cwd is not None:
inst.launch_dir = cwd
# [issue #119] 2. After forking, the parent closes the writing end
# of the pipe and reads from the reading end.
os.close(exec_err_pipe_write)
exec_err_data = os.read(exec_err_pipe_read, 4096)
os.close(exec_err_pipe_read)
# [issue #119] 6. The parent reads eof (a zero-length read) if the
# child successfully performed exec, since close-on-exec made
# successful exec close the writing end of the pipe. Or, if exec
# failed, the parent reads the error code and can proceed
# accordingly. Either way, the parent blocks until the child calls
# exec.
if len(exec_err_data) != 0:
try:
errclass, errno_s, errmsg = exec_err_data.split(b':', 2)
exctype = getattr(builtins, errclass.decode('ascii'), Exception)
exception = exctype(errmsg.decode('utf-8', 'replace'))
if exctype is OSError:
exception.errno = int(errno_s)
except:
raise Exception('Subprocess failed, got bad error data: %r'
% exec_err_data)
else:
raise exception
try:
inst.setwinsize(*dimensions)
except IOError as err:
if err.args[0] not in (errno.EINVAL, errno.ENOTTY, errno.ENXIO):
raise
return inst
def __repr__(self):
clsname = type(self).__name__
if self.argv is not None:
args = [repr(self.argv)]
if self.env is not None:
args.append("env=%r" % self.env)
if self.launch_dir is not None:
args.append("cwd=%r" % self.launch_dir)
return "{}.spawn({})".format(clsname, ", ".join(args))
else:
return "{}(pid={}, fd={})".format(clsname, self.pid, self.fd)
@staticmethod
def _coerce_send_string(s):
if not isinstance(s, bytes):
return s.encode('utf-8')
return s
@staticmethod
def _coerce_read_string(s):
return s
def __del__(self):
'''This makes sure that no system resources are left open. Python only
garbage collects Python objects. OS file descriptors are not Python
objects, so they must be handled explicitly. If the child file
descriptor was opened outside of this class (passed to the constructor)
then this does not close it. '''
if not self.closed:
# It is possible for __del__ methods to execute during the
# teardown of the Python VM itself. Thus self.close() may
# trigger an exception because os.close may be None.
try:
self.close()
# which exception, shouldn't we catch explicitly .. ?
except:
pass
def fileno(self):
'''This returns the file descriptor of the pty for the child.
'''
return self.fd
def close(self, force=True):
'''This closes the connection with the child application. Note that
calling close() more than once is valid. This emulates standard Python
behavior with files. Set force to True if you want to make sure that
the child is terminated (SIGKILL is sent if the child ignores SIGHUP
and SIGINT). '''
if not self.closed:
self.flush()
self.fileobj.close() # Closes the file descriptor
# Give kernel time to update process status.
time.sleep(self.delayafterclose)
if self.isalive():
if not self.terminate(force):
raise PtyProcessError('Could not terminate the child.')
self.fd = -1
self.closed = True
#self.pid = None
def flush(self):
'''This does nothing. It is here to support the interface for a
File-like object. '''
pass
def isatty(self):
'''This returns True if the file descriptor is open and connected to a
tty(-like) device, else False.
On SVR4-style platforms implementing streams, such as SunOS and HP-UX,
the child pty may not appear as a terminal device. This means
methods such as setecho(), setwinsize(), getwinsize() may raise an
IOError. '''
return os.isatty(self.fd)
def waitnoecho(self, timeout=None):
'''Wait until the terminal ECHO flag is set False.
This returns True if the echo mode is off, or False if echo was not
disabled before the timeout. This can be used to detect when the
child is waiting for a password. Usually a child application will turn
off echo mode when it is waiting for the user to enter a password. For
example, instead of expecting the "password:" prompt you can wait for
the child to turn echo off::
p = pexpect.spawn('ssh user@example.com')
p.waitnoecho()
p.sendline(mypassword)
If ``timeout=None`` then this method to block until ECHO flag is False.
'''
if timeout is not None:
end_time = time.time() + timeout
while True:
if not self.getecho():
return True
if timeout < 0 and timeout is not None:
return False
if timeout is not None:
timeout = end_time - time.time()
time.sleep(0.1)
def getecho(self):
'''Returns True if terminal echo is on, or False if echo is off.
Child applications that are expecting you to enter a password often
disable echo. See also :meth:`waitnoecho`.
Not supported on platforms where ``isatty()`` returns False.
'''
try:
attr = termios.tcgetattr(self.fd)
except termios.error as err:
errmsg = 'getecho() may not be called on this platform'
if err.args[0] == errno.EINVAL:
raise IOError(err.args[0], '%s: %s.' % (err.args[1], errmsg))
raise
self.echo = bool(attr[3] & termios.ECHO)
return self.echo
def setecho(self, state):
'''Enable or disable terminal echo.
Anything the child sent before the echo will be lost, so you should be
sure that your input buffer is empty before you call setecho().
For example, the following will work as expected::
p = pexpect.spawn('cat') # Echo is on by default.
p.sendline('1234') # We expect see this twice from the child...
p.expect(['1234']) # ... once from the tty echo...
p.expect(['1234']) # ... and again from cat itself.
p.setecho(False) # Turn off tty echo
p.sendline('abcd') # We will set this only once (echoed by cat).
p.sendline('wxyz') # We will set this only once (echoed by cat)
p.expect(['abcd'])
p.expect(['wxyz'])
The following WILL NOT WORK because the lines sent before the setecho
will be lost::
p = pexpect.spawn('cat')
p.sendline('1234')
p.setecho(False) # Turn off tty echo
p.sendline('abcd') # We will set this only once (echoed by cat).
p.sendline('wxyz') # We will set this only once (echoed by cat)
p.expect(['1234'])
p.expect(['1234'])
p.expect(['abcd'])
p.expect(['wxyz'])
Not supported on platforms where ``isatty()`` returns False.
'''
_setecho(self.fd, state)
self.echo = state
def read(self, size=1024):
"""Read and return at most ``size`` bytes from the pty.
Can block if there is nothing to read. Raises :exc:`EOFError` if the
terminal was closed.
Unlike Pexpect's ``read_nonblocking`` method, this doesn't try to deal
with the vagaries of EOF on platforms that do strange things, like IRIX
or older Solaris systems. It handles the errno=EIO pattern used on
Linux, and the empty-string return used on BSD platforms and (seemingly)
on recent Solaris.
"""
try:
s = self.fileobj.read1(size)
except (OSError, IOError) as err:
if err.args[0] == errno.EIO:
# Linux-style EOF
self.flag_eof = True
raise EOFError('End Of File (EOF). Exception style platform.')
raise
if s == b'':
# BSD-style EOF (also appears to work on recent Solaris (OpenIndiana))
self.flag_eof = True
raise EOFError('End Of File (EOF). Empty string style platform.')
return s
def readline(self):
"""Read one line from the pseudoterminal, and return it as unicode.
Can block if there is nothing to read. Raises :exc:`EOFError` if the
terminal was closed.
"""
try:
s = self.fileobj.readline()
except (OSError, IOError) as err:
if err.args[0] == errno.EIO:
# Linux-style EOF
self.flag_eof = True
raise EOFError('End Of File (EOF). Exception style platform.')
raise
if s == b'':
# BSD-style EOF (also appears to work on recent Solaris (OpenIndiana))
self.flag_eof = True
raise EOFError('End Of File (EOF). Empty string style platform.')
return s
def _writeb(self, b, flush=True):
n = self.fileobj.write(b)
if flush:
self.fileobj.flush()
return n
def write(self, s, flush=True):
"""Write bytes to the pseudoterminal.
Returns the number of bytes written.
"""
return self._writeb(s, flush=flush)
def sendcontrol(self, char):
'''Helper method for sending control characters to the terminal.
For example, to send Ctrl-G (ASCII 7, bell, ``'\\a'``)::
child.sendcontrol('g')
See also, :meth:`sendintr` and :meth:`sendeof`.
'''
char = char.lower()
a = ord(char)
if 97 <= a <= 122:
a = a - ord('a') + 1
byte = _byte(a)
return self._writeb(byte), byte
d = {'@': 0, '`': 0,
'[': 27, '{': 27,
'\\': 28, '|': 28,
']': 29, '}': 29,
'^': 30, '~': 30,
'_': 31,
'?': 127}
if char not in d:
return 0, b''
byte = _byte(d[char])
return self._writeb(byte), byte
def sendeof(self):
'''Sends an EOF (typically Ctrl-D) through the terminal.
This sends a character which causes
the pending parent output buffer to be sent to the waiting child
program without waiting for end-of-line. If it is the first character
of the line, the read() in the user program returns 0, which signifies
end-of-file. This means to work as expected a sendeof() has to be
called at the beginning of a line. This method does not send a newline.
It is the responsibility of the caller to ensure the eof is sent at the
beginning of a line.
'''
return self._writeb(_EOF), _EOF
def sendintr(self):
'''Send an interrupt character (typically Ctrl-C) through the terminal.
This will normally trigger the kernel to send SIGINT to the current
foreground process group. Processes can turn off this translation, in
which case they can read the raw data sent, e.g. ``b'\\x03'`` for Ctrl-C.
See also the :meth:`kill` method, which sends a signal directly to the
immediate child process in the terminal (which is not necessarily the
foreground process).
'''
return self._writeb(_INTR), _INTR
def eof(self):
'''This returns True if the EOF exception was ever raised.
'''
return self.flag_eof
def terminate(self, force=False):
'''This forces a child process to terminate. It starts nicely with
SIGHUP and SIGINT. If "force" is True then moves onto SIGKILL. This
returns True if the child was terminated. This returns False if the
child could not be terminated. '''
if not self.isalive():
return True
try:
self.kill(signal.SIGHUP)
time.sleep(self.delayafterterminate)
if not self.isalive():
return True
self.kill(signal.SIGCONT)
time.sleep(self.delayafterterminate)
if not self.isalive():
return True
self.kill(signal.SIGINT)
time.sleep(self.delayafterterminate)
if not self.isalive():
return True
if force:
self.kill(signal.SIGKILL)
time.sleep(self.delayafterterminate)
if not self.isalive():
return True
else:
return False
return False
except OSError:
# I think there are kernel timing issues that sometimes cause
# this to happen. I think isalive() reports True, but the
# process is dead to the kernel.
# Make one last attempt to see if the kernel is up to date.
time.sleep(self.delayafterterminate)
if not self.isalive():
return True
else:
return False
def wait(self):
'''This waits until the child exits. This is a blocking call. This will
not read any data from the child, so this will block forever if the
child has unread output and has terminated. In other words, the child
may have printed output then called exit(), but, the child is
technically still alive until its output is read by the parent. '''
if self.isalive():
pid, status = os.waitpid(self.pid, 0)
else:
return self.exitstatus
self.exitstatus = os.WEXITSTATUS(status)
if os.WIFEXITED(status):
self.status = status
self.exitstatus = os.WEXITSTATUS(status)
self.signalstatus = None
self.terminated = True
elif os.WIFSIGNALED(status):
self.status = status
self.exitstatus = None
self.signalstatus = os.WTERMSIG(status)
self.terminated = True
elif os.WIFSTOPPED(status): # pragma: no cover
# You can't call wait() on a child process in the stopped state.
raise PtyProcessError('Called wait() on a stopped child ' +
'process. This is not supported. Is some other ' +
'process attempting job control with our child pid?')
return self.exitstatus
def isalive(self):
'''This tests if the child process is running or not. This is
non-blocking. If the child was terminated then this will read the
exitstatus or signalstatus of the child. This returns True if the child
process appears to be running or False if not. It can take literally
SECONDS for Solaris to return the right status. '''
if self.terminated:
return False
if self.flag_eof:
# This is for Linux, which requires the blocking form
# of waitpid to get the status of a defunct process.
# This is super-lame. The flag_eof would have been set
# in read_nonblocking(), so this should be safe.
waitpid_options = 0
else:
waitpid_options = os.WNOHANG
try:
pid, status = os.waitpid(self.pid, waitpid_options)
except OSError as e:
# No child processes
if e.errno == errno.ECHILD:
raise PtyProcessError('isalive() encountered condition ' +
'where "terminated" is 0, but there was no child ' +
'process. Did someone else call waitpid() ' +
'on our process?')
else:
raise
# I have to do this twice for Solaris.
# I can't even believe that I figured this out...
# If waitpid() returns 0 it means that no child process
# wishes to report, and the value of status is undefined.
if pid == 0:
try:
### os.WNOHANG) # Solaris!
pid, status = os.waitpid(self.pid, waitpid_options)
except OSError as e: # pragma: no cover
# This should never happen...
if e.errno == errno.ECHILD:
raise PtyProcessError('isalive() encountered condition ' +
'that should never happen. There was no child ' +
'process. Did someone else call waitpid() ' +
'on our process?')
else:
raise
# If pid is still 0 after two calls to waitpid() then the process
# really is alive. This seems to work on all platforms, except for
# Irix which seems to require a blocking call on waitpid or select,
# so I let read_nonblocking take care of this situation
# (unfortunately, this requires waiting through the timeout).
if pid == 0:
return True
if pid == 0:
return True
if os.WIFEXITED(status):
self.status = status
self.exitstatus = os.WEXITSTATUS(status)
self.signalstatus = None
self.terminated = True
elif os.WIFSIGNALED(status):
self.status = status
self.exitstatus = None
self.signalstatus = os.WTERMSIG(status)
self.terminated = True
elif os.WIFSTOPPED(status):
raise PtyProcessError('isalive() encountered condition ' +
'where child process is stopped. This is not ' +
'supported. Is some other process attempting ' +
'job control with our child pid?')
return False
def kill(self, sig):
"""Send the given signal to the child application.
In keeping with UNIX tradition it has a misleading name. It does not
necessarily kill the child unless you send the right signal. See the
:mod:`signal` module for constants representing signal numbers.
"""
# Same as os.kill, but the pid is given for you.
if self.isalive():
os.kill(self.pid, sig)
def getwinsize(self):
"""Return the window size of the pseudoterminal as a tuple (rows, cols).
"""
TIOCGWINSZ = getattr(termios, 'TIOCGWINSZ', 1074295912)
s = struct.pack('HHHH', 0, 0, 0, 0)
x = fcntl.ioctl(self.fd, TIOCGWINSZ, s)
return struct.unpack('HHHH', x)[0:2]
def setwinsize(self, rows, cols):
"""Set the terminal window size of the child tty.
This will cause a SIGWINCH signal to be sent to the child. This does not
change the physical window size. It changes the size reported to
TTY-aware applications like vi or curses -- applications that respond to
the SIGWINCH signal.
"""
return _setwinsize(self.fd, rows, cols)
class PtyProcessUnicode(PtyProcess):
"""Unicode wrapper around a process running in a pseudoterminal.
This class exposes a similar interface to :class:`PtyProcess`, but its read
methods return unicode, and its :meth:`write` accepts unicode.
"""
if PY3:
string_type = str
else:
string_type = unicode # analysis:ignore
def __init__(self, pid, fd, encoding='utf-8', codec_errors='strict'):
super(PtyProcessUnicode, self).__init__(pid, fd)
self.encoding = encoding
self.codec_errors = codec_errors
self.decoder = codecs.getincrementaldecoder(encoding)(errors=codec_errors)
def read(self, size=1024):
"""Read at most ``size`` bytes from the pty, return them as unicode.
Can block if there is nothing to read. Raises :exc:`EOFError` if the
terminal was closed.
The size argument still refers to bytes, not unicode code points.
"""
b = super(PtyProcessUnicode, self).read(size)
return self.decoder.decode(b, final=False)
def readline(self):
"""Read one line from the pseudoterminal, and return it as unicode.
Can block if there is nothing to read. Raises :exc:`EOFError` if the
terminal was closed.
"""
b = super(PtyProcessUnicode, self).readline()
return self.decoder.decode(b, final=False)
def write(self, s):
"""Write the unicode string ``s`` to the pseudoterminal.
Returns the number of bytes written.
"""
b = s.encode(self.encoding)
return super(PtyProcessUnicode, self).write(b)

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try:
from shutil import which # Python >= 3.3
except ImportError:
import os, sys
# This is copied from Python 3.4.1
def which(cmd, mode=os.F_OK | os.X_OK, path=None):
"""Given a command, mode, and a PATH string, return the path which
conforms to the given mode on the PATH, or None if there is no such
file.
`mode` defaults to os.F_OK | os.X_OK. `path` defaults to the result
of os.environ.get("PATH"), or can be overridden with a custom search
path.
"""
# Check that a given file can be accessed with the correct mode.
# Additionally check that `file` is not a directory, as on Windows
# directories pass the os.access check.
def _access_check(fn, mode):
return (os.path.exists(fn) and os.access(fn, mode)
and not os.path.isdir(fn))
# If we're given a path with a directory part, look it up directly rather
# than referring to PATH directories. This includes checking relative to the
# current directory, e.g. ./script
if os.path.dirname(cmd):
if _access_check(cmd, mode):
return cmd
return None
if path is None:
path = os.environ.get("PATH", os.defpath)
if not path:
return None
path = path.split(os.pathsep)
if sys.platform == "win32":
# The current directory takes precedence on Windows.
if not os.curdir in path:
path.insert(0, os.curdir)
# PATHEXT is necessary to check on Windows.
pathext = os.environ.get("PATHEXT", "").split(os.pathsep)
# See if the given file matches any of the expected path extensions.
# This will allow us to short circuit when given "python.exe".
# If it does match, only test that one, otherwise we have to try
# others.
if any(cmd.lower().endswith(ext.lower()) for ext in pathext):
files = [cmd]
else:
files = [cmd + ext for ext in pathext]
else:
# On other platforms you don't have things like PATHEXT to tell you
# what file suffixes are executable, so just pass on cmd as-is.
files = [cmd]
seen = set()
for dir in path:
normdir = os.path.normcase(dir)
if not normdir in seen:
seen.add(normdir)
for thefile in files:
name = os.path.join(dir, thefile)
if _access_check(name, mode):
return name
return None
class PtyProcessError(Exception):
"""Generic error class for this package."""

537
plugins/git_clone/pexpect/pxssh.py Normal file
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'''This class extends pexpect.spawn to specialize setting up SSH connections.
This adds methods for login, logout, and expecting the shell prompt.
PEXPECT LICENSE
This license is approved by the OSI and FSF as GPL-compatible.
http://opensource.org/licenses/isc-license.txt
Copyright (c) 2012, Noah Spurrier <noah@noah.org>
PERMISSION TO USE, COPY, MODIFY, AND/OR DISTRIBUTE THIS SOFTWARE FOR ANY
PURPOSE WITH OR WITHOUT FEE IS HEREBY GRANTED, PROVIDED THAT THE ABOVE
COPYRIGHT NOTICE AND THIS PERMISSION NOTICE APPEAR IN ALL COPIES.
THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
'''
from pexpect import ExceptionPexpect, TIMEOUT, EOF, spawn
import time
import os
import sys
import re
__all__ = ['ExceptionPxssh', 'pxssh']
# Exception classes used by this module.
class ExceptionPxssh(ExceptionPexpect):
'''Raised for pxssh exceptions.
'''
if sys.version_info > (3, 0):
from shlex import quote
else:
_find_unsafe = re.compile(r'[^\w@%+=:,./-]').search
def quote(s):
"""Return a shell-escaped version of the string *s*."""
if not s:
return "''"
if _find_unsafe(s) is None:
return s
# use single quotes, and put single quotes into double quotes
# the string $'b is then quoted as '$'"'"'b'
return "'" + s.replace("'", "'\"'\"'") + "'"
class pxssh (spawn):
'''This class extends pexpect.spawn to specialize setting up SSH
connections. This adds methods for login, logout, and expecting the shell
prompt. It does various tricky things to handle many situations in the SSH
login process. For example, if the session is your first login, then pxssh
automatically accepts the remote certificate; or if you have public key
authentication setup then pxssh won't wait for the password prompt.
pxssh uses the shell prompt to synchronize output from the remote host. In
order to make this more robust it sets the shell prompt to something more
unique than just $ or #. This should work on most Borne/Bash or Csh style
shells.
Example that runs a few commands on a remote server and prints the result::
from pexpect import pxssh
import getpass
try:
s = pxssh.pxssh()
hostname = raw_input('hostname: ')
username = raw_input('username: ')
password = getpass.getpass('password: ')
s.login(hostname, username, password)
s.sendline('uptime') # run a command
s.prompt() # match the prompt
print(s.before) # print everything before the prompt.
s.sendline('ls -l')
s.prompt()
print(s.before)
s.sendline('df')
s.prompt()
print(s.before)
s.logout()
except pxssh.ExceptionPxssh as e:
print("pxssh failed on login.")
print(e)
Example showing how to specify SSH options::
from pexpect import pxssh
s = pxssh.pxssh(options={
"StrictHostKeyChecking": "no",
"UserKnownHostsFile": "/dev/null"})
...
Note that if you have ssh-agent running while doing development with pxssh
then this can lead to a lot of confusion. Many X display managers (xdm,
gdm, kdm, etc.) will automatically start a GUI agent. You may see a GUI
dialog box popup asking for a password during development. You should turn
off any key agents during testing. The 'force_password' attribute will turn
off public key authentication. This will only work if the remote SSH server
is configured to allow password logins. Example of using 'force_password'
attribute::
s = pxssh.pxssh()
s.force_password = True
hostname = raw_input('hostname: ')
username = raw_input('username: ')
password = getpass.getpass('password: ')
s.login (hostname, username, password)
`debug_command_string` is only for the test suite to confirm that the string
generated for SSH is correct, using this will not allow you to do
anything other than get a string back from `pxssh.pxssh.login()`.
'''
def __init__ (self, timeout=30, maxread=2000, searchwindowsize=None,
logfile=None, cwd=None, env=None, ignore_sighup=True, echo=True,
options={}, encoding=None, codec_errors='strict',
debug_command_string=False, use_poll=False):
spawn.__init__(self, None, timeout=timeout, maxread=maxread,
searchwindowsize=searchwindowsize, logfile=logfile,
cwd=cwd, env=env, ignore_sighup=ignore_sighup, echo=echo,
encoding=encoding, codec_errors=codec_errors, use_poll=use_poll)
self.name = '<pxssh>'
#SUBTLE HACK ALERT! Note that the command that SETS the prompt uses a
#slightly different string than the regular expression to match it. This
#is because when you set the prompt the command will echo back, but we
#don't want to match the echoed command. So if we make the set command
#slightly different than the regex we eliminate the problem. To make the
#set command different we add a backslash in front of $. The $ doesn't
#need to be escaped, but it doesn't hurt and serves to make the set
#prompt command different than the regex.
# used to match the command-line prompt
self.UNIQUE_PROMPT = r"\[PEXPECT\][\$\#] "
self.PROMPT = self.UNIQUE_PROMPT
# used to set shell command-line prompt to UNIQUE_PROMPT.
self.PROMPT_SET_SH = r"PS1='[PEXPECT]\$ '"
self.PROMPT_SET_CSH = r"set prompt='[PEXPECT]\$ '"
self.SSH_OPTS = ("-o'RSAAuthentication=no'"
+ " -o 'PubkeyAuthentication=no'")
# Disabling host key checking, makes you vulnerable to MITM attacks.
# + " -o 'StrictHostKeyChecking=no'"
# + " -o 'UserKnownHostsFile /dev/null' ")
# Disabling X11 forwarding gets rid of the annoying SSH_ASKPASS from
# displaying a GUI password dialog. I have not figured out how to
# disable only SSH_ASKPASS without also disabling X11 forwarding.
# Unsetting SSH_ASKPASS on the remote side doesn't disable it! Annoying!
#self.SSH_OPTS = "-x -o'RSAAuthentication=no' -o 'PubkeyAuthentication=no'"
self.force_password = False
self.debug_command_string = debug_command_string
# User defined SSH options, eg,
# ssh.otions = dict(StrictHostKeyChecking="no",UserKnownHostsFile="/dev/null")
self.options = options
def levenshtein_distance(self, a, b):
'''This calculates the Levenshtein distance between a and b.
'''
n, m = len(a), len(b)
if n > m:
a,b = b,a
n,m = m,n
current = range(n+1)
for i in range(1,m+1):
previous, current = current, [i]+[0]*n
for j in range(1,n+1):
add, delete = previous[j]+1, current[j-1]+1
change = previous[j-1]
if a[j-1] != b[i-1]:
change = change + 1
current[j] = min(add, delete, change)
return current[n]
def try_read_prompt(self, timeout_multiplier):
'''This facilitates using communication timeouts to perform
synchronization as quickly as possible, while supporting high latency
connections with a tunable worst case performance. Fast connections
should be read almost immediately. Worst case performance for this
method is timeout_multiplier * 3 seconds.
'''
# maximum time allowed to read the first response
first_char_timeout = timeout_multiplier * 0.5
# maximum time allowed between subsequent characters
inter_char_timeout = timeout_multiplier * 0.1
# maximum time for reading the entire prompt
total_timeout = timeout_multiplier * 3.0
prompt = self.string_type()
begin = time.time()
expired = 0.0
timeout = first_char_timeout
while expired < total_timeout:
try:
prompt += self.read_nonblocking(size=1, timeout=timeout)
expired = time.time() - begin # updated total time expired
timeout = inter_char_timeout
except TIMEOUT:
break
return prompt
def sync_original_prompt (self, sync_multiplier=1.0):
'''This attempts to find the prompt. Basically, press enter and record
the response; press enter again and record the response; if the two
responses are similar then assume we are at the original prompt.
This can be a slow function. Worst case with the default sync_multiplier
can take 12 seconds. Low latency connections are more likely to fail
with a low sync_multiplier. Best case sync time gets worse with a
high sync multiplier (500 ms with default). '''
# All of these timing pace values are magic.
# I came up with these based on what seemed reliable for
# connecting to a heavily loaded machine I have.
self.sendline()
time.sleep(0.1)
try:
# Clear the buffer before getting the prompt.
self.try_read_prompt(sync_multiplier)
except TIMEOUT:
pass
self.sendline()
x = self.try_read_prompt(sync_multiplier)
self.sendline()
a = self.try_read_prompt(sync_multiplier)
self.sendline()
b = self.try_read_prompt(sync_multiplier)
ld = self.levenshtein_distance(a,b)
len_a = len(a)
if len_a == 0:
return False
if float(ld)/len_a < 0.4:
return True
return False
### TODO: This is getting messy and I'm pretty sure this isn't perfect.
### TODO: I need to draw a flow chart for this.
### TODO: Unit tests for SSH tunnels, remote SSH command exec, disabling original prompt sync
def login (self, server, username=None, password='', terminal_type='ansi',
original_prompt=r"[#$]", login_timeout=10, port=None,
auto_prompt_reset=True, ssh_key=None, quiet=True,
sync_multiplier=1, check_local_ip=True,
password_regex=r'(?i)(?:password:)|(?:passphrase for key)',
ssh_tunnels={}, spawn_local_ssh=True,
sync_original_prompt=True, ssh_config=None, cmd='ssh'):
'''This logs the user into the given server.
It uses 'original_prompt' to try to find the prompt right after login.
When it finds the prompt it immediately tries to reset the prompt to
something more easily matched. The default 'original_prompt' is very
optimistic and is easily fooled. It's more reliable to try to match the original
prompt as exactly as possible to prevent false matches by server
strings such as the "Message Of The Day". On many systems you can
disable the MOTD on the remote server by creating a zero-length file
called :file:`~/.hushlogin` on the remote server. If a prompt cannot be found
then this will not necessarily cause the login to fail. In the case of
a timeout when looking for the prompt we assume that the original
prompt was so weird that we could not match it, so we use a few tricks
to guess when we have reached the prompt. Then we hope for the best and
blindly try to reset the prompt to something more unique. If that fails
then login() raises an :class:`ExceptionPxssh` exception.
In some situations it is not possible or desirable to reset the
original prompt. In this case, pass ``auto_prompt_reset=False`` to
inhibit setting the prompt to the UNIQUE_PROMPT. Remember that pxssh
uses a unique prompt in the :meth:`prompt` method. If the original prompt is
not reset then this will disable the :meth:`prompt` method unless you
manually set the :attr:`PROMPT` attribute.
Set ``password_regex`` if there is a MOTD message with `password` in it.
Changing this is like playing in traffic, don't (p)expect it to match straight
away.
If you require to connect to another SSH server from the your original SSH
connection set ``spawn_local_ssh`` to `False` and this will use your current
session to do so. Setting this option to `False` and not having an active session
will trigger an error.
Set ``ssh_key`` to a file path to an SSH private key to use that SSH key
for the session authentication.
Set ``ssh_key`` to `True` to force passing the current SSH authentication socket
to the desired ``hostname``.
Set ``ssh_config`` to a file path string of an SSH client config file to pass that
file to the client to handle itself. You may set any options you wish in here, however
doing so will require you to post extra information that you may not want to if you
run into issues.
Alter the ``cmd`` to change the ssh client used, or to prepend it with network
namespaces. For example ```cmd="ip netns exec vlan2 ssh"``` to execute the ssh in
network namespace named ```vlan```.
'''
session_regex_array = ["(?i)are you sure you want to continue connecting", original_prompt, password_regex, "(?i)permission denied", "(?i)terminal type", TIMEOUT]
session_init_regex_array = []
session_init_regex_array.extend(session_regex_array)
session_init_regex_array.extend(["(?i)connection closed by remote host", EOF])
ssh_options = ''.join([" -o '%s=%s'" % (o, v) for (o, v) in self.options.items()])
if quiet:
ssh_options = ssh_options + ' -q'
if not check_local_ip:
ssh_options = ssh_options + " -o'NoHostAuthenticationForLocalhost=yes'"
if self.force_password:
ssh_options = ssh_options + ' ' + self.SSH_OPTS
if ssh_config is not None:
if spawn_local_ssh and not os.path.isfile(ssh_config):
raise ExceptionPxssh('SSH config does not exist or is not a file.')
ssh_options = ssh_options + ' -F ' + ssh_config
if port is not None:
ssh_options = ssh_options + ' -p %s'%(str(port))
if ssh_key is not None:
# Allow forwarding our SSH key to the current session
if ssh_key==True:
ssh_options = ssh_options + ' -A'
else:
if spawn_local_ssh and not os.path.isfile(ssh_key):
raise ExceptionPxssh('private ssh key does not exist or is not a file.')
ssh_options = ssh_options + ' -i %s' % (ssh_key)
# SSH tunnels, make sure you know what you're putting into the lists
# under each heading. Do not expect these to open 100% of the time,
# The port you're requesting might be bound.
#
# The structure should be like this:
# { 'local': ['2424:localhost:22'], # Local SSH tunnels
# 'remote': ['2525:localhost:22'], # Remote SSH tunnels
# 'dynamic': [8888] } # Dynamic/SOCKS tunnels
if ssh_tunnels!={} and isinstance({},type(ssh_tunnels)):
tunnel_types = {
'local':'L',
'remote':'R',
'dynamic':'D'
}
for tunnel_type in tunnel_types:
cmd_type = tunnel_types[tunnel_type]
if tunnel_type in ssh_tunnels:
tunnels = ssh_tunnels[tunnel_type]
for tunnel in tunnels:
if spawn_local_ssh==False:
tunnel = quote(str(tunnel))
ssh_options = ssh_options + ' -' + cmd_type + ' ' + str(tunnel)
if username is not None:
ssh_options = ssh_options + ' -l ' + username
elif ssh_config is None:
raise TypeError('login() needs either a username or an ssh_config')
else: # make sure ssh_config has an entry for the server with a username
with open(ssh_config, 'rt') as f:
lines = [l.strip() for l in f.readlines()]
server_regex = r'^Host\s+%s\s*$' % server
user_regex = r'^User\s+\w+\s*$'
config_has_server = False
server_has_username = False
for line in lines:
if not config_has_server and re.match(server_regex, line, re.IGNORECASE):
config_has_server = True
elif config_has_server and 'hostname' in line.lower():
pass
elif config_has_server and 'host' in line.lower():
server_has_username = False # insurance
break # we have left the relevant section
elif config_has_server and re.match(user_regex, line, re.IGNORECASE):
server_has_username = True
break
if lines:
del line
del lines
if not config_has_server:
raise TypeError('login() ssh_config has no Host entry for %s' % server)
elif not server_has_username:
raise TypeError('login() ssh_config has no user entry for %s' % server)
cmd += " %s %s" % (ssh_options, server)
if self.debug_command_string:
return(cmd)
# Are we asking for a local ssh command or to spawn one in another session?
if spawn_local_ssh:
spawn._spawn(self, cmd)
else:
self.sendline(cmd)
# This does not distinguish between a remote server 'password' prompt
# and a local ssh 'passphrase' prompt (for unlocking a private key).
i = self.expect(session_init_regex_array, timeout=login_timeout)
# First phase
if i==0:
# New certificate -- always accept it.
# This is what you get if SSH does not have the remote host's
# public key stored in the 'known_hosts' cache.
self.sendline("yes")
i = self.expect(session_regex_array)
if i==2: # password or passphrase
self.sendline(password)
i = self.expect(session_regex_array)
if i==4:
self.sendline(terminal_type)
i = self.expect(session_regex_array)
if i==7:
self.close()
raise ExceptionPxssh('Could not establish connection to host')
# Second phase
if i==0:
# This is weird. This should not happen twice in a row.
self.close()
raise ExceptionPxssh('Weird error. Got "are you sure" prompt twice.')
elif i==1: # can occur if you have a public key pair set to authenticate.
### TODO: May NOT be OK if expect() got tricked and matched a false prompt.
pass
elif i==2: # password prompt again
# For incorrect passwords, some ssh servers will
# ask for the password again, others return 'denied' right away.
# If we get the password prompt again then this means
# we didn't get the password right the first time.
self.close()
raise ExceptionPxssh('password refused')
elif i==3: # permission denied -- password was bad.
self.close()
raise ExceptionPxssh('permission denied')
elif i==4: # terminal type again? WTF?
self.close()
raise ExceptionPxssh('Weird error. Got "terminal type" prompt twice.')
elif i==5: # Timeout
#This is tricky... I presume that we are at the command-line prompt.
#It may be that the shell prompt was so weird that we couldn't match
#it. Or it may be that we couldn't log in for some other reason. I
#can't be sure, but it's safe to guess that we did login because if
#I presume wrong and we are not logged in then this should be caught
#later when I try to set the shell prompt.
pass
elif i==6: # Connection closed by remote host
self.close()
raise ExceptionPxssh('connection closed')
else: # Unexpected
self.close()
raise ExceptionPxssh('unexpected login response')
if sync_original_prompt:
if not self.sync_original_prompt(sync_multiplier):
self.close()
raise ExceptionPxssh('could not synchronize with original prompt')
# We appear to be in.
# set shell prompt to something unique.
if auto_prompt_reset:
if not self.set_unique_prompt():
self.close()
raise ExceptionPxssh('could not set shell prompt '
'(received: %r, expected: %r).' % (
self.before, self.PROMPT,))
return True
def logout (self):
'''Sends exit to the remote shell.
If there are stopped jobs then this automatically sends exit twice.
'''
self.sendline("exit")
index = self.expect([EOF, "(?i)there are stopped jobs"])
if index==1:
self.sendline("exit")
self.expect(EOF)
self.close()
def prompt(self, timeout=-1):
'''Match the next shell prompt.
This is little more than a short-cut to the :meth:`~pexpect.spawn.expect`
method. Note that if you called :meth:`login` with
``auto_prompt_reset=False``, then before calling :meth:`prompt` you must
set the :attr:`PROMPT` attribute to a regex that it will use for
matching the prompt.
Calling :meth:`prompt` will erase the contents of the :attr:`before`
attribute even if no prompt is ever matched. If timeout is not given or
it is set to -1 then self.timeout is used.
:return: True if the shell prompt was matched, False if the timeout was
reached.
'''
if timeout == -1:
timeout = self.timeout
i = self.expect([self.PROMPT, TIMEOUT], timeout=timeout)
if i==1:
return False
return True
def set_unique_prompt(self):
'''This sets the remote prompt to something more unique than ``#`` or ``$``.
This makes it easier for the :meth:`prompt` method to match the shell prompt
unambiguously. This method is called automatically by the :meth:`login`
method, but you may want to call it manually if you somehow reset the
shell prompt. For example, if you 'su' to a different user then you
will need to manually reset the prompt. This sends shell commands to
the remote host to set the prompt, so this assumes the remote host is
ready to receive commands.
Alternatively, you may use your own prompt pattern. In this case you
should call :meth:`login` with ``auto_prompt_reset=False``; then set the
:attr:`PROMPT` attribute to a regular expression. After that, the
:meth:`prompt` method will try to match your prompt pattern.
'''
self.sendline("unset PROMPT_COMMAND")
self.sendline(self.PROMPT_SET_SH) # sh-style
i = self.expect ([TIMEOUT, self.PROMPT], timeout=10)
if i == 0: # csh-style
self.sendline(self.PROMPT_SET_CSH)
i = self.expect([TIMEOUT, self.PROMPT], timeout=10)
if i == 0:
return False
return True
# vi:ts=4:sw=4:expandtab:ft=python:

130
plugins/git_clone/pexpect/replwrap.py Normal file
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"""Generic wrapper for read-eval-print-loops, a.k.a. interactive shells
"""
import os.path
import signal
import sys
import pexpect
PY3 = (sys.version_info[0] >= 3)
if PY3:
basestring = str
PEXPECT_PROMPT = u'[PEXPECT_PROMPT>'
PEXPECT_CONTINUATION_PROMPT = u'[PEXPECT_PROMPT+'
class REPLWrapper(object):
"""Wrapper for a REPL.
:param cmd_or_spawn: This can either be an instance of :class:`pexpect.spawn`
in which a REPL has already been started, or a str command to start a new
REPL process.
:param str orig_prompt: The prompt to expect at first.
:param str prompt_change: A command to change the prompt to something more
unique. If this is ``None``, the prompt will not be changed. This will
be formatted with the new and continuation prompts as positional
parameters, so you can use ``{}`` style formatting to insert them into
the command.
:param str new_prompt: The more unique prompt to expect after the change.
:param str extra_init_cmd: Commands to do extra initialisation, such as
disabling pagers.
"""
def __init__(self, cmd_or_spawn, orig_prompt, prompt_change,
new_prompt=PEXPECT_PROMPT,
continuation_prompt=PEXPECT_CONTINUATION_PROMPT,
extra_init_cmd=None):
if isinstance(cmd_or_spawn, basestring):
self.child = pexpect.spawn(cmd_or_spawn, echo=False, encoding='utf-8')
else:
self.child = cmd_or_spawn
if self.child.echo:
# Existing spawn instance has echo enabled, disable it
# to prevent our input from being repeated to output.
self.child.setecho(False)
self.child.waitnoecho()
if prompt_change is None:
self.prompt = orig_prompt
else:
self.set_prompt(orig_prompt,
prompt_change.format(new_prompt, continuation_prompt))
self.prompt = new_prompt
self.continuation_prompt = continuation_prompt
self._expect_prompt()
if extra_init_cmd is not None:
self.run_command(extra_init_cmd)
def set_prompt(self, orig_prompt, prompt_change):
self.child.expect(orig_prompt)
self.child.sendline(prompt_change)
def _expect_prompt(self, timeout=-1, async_=False):
return self.child.expect_exact([self.prompt, self.continuation_prompt],
timeout=timeout, async_=async_)
def run_command(self, command, timeout=-1, async_=False):
"""Send a command to the REPL, wait for and return output.
:param str command: The command to send. Trailing newlines are not needed.
This should be a complete block of input that will trigger execution;
if a continuation prompt is found after sending input, :exc:`ValueError`
will be raised.
:param int timeout: How long to wait for the next prompt. -1 means the
default from the :class:`pexpect.spawn` object (default 30 seconds).
None means to wait indefinitely.
:param bool async_: On Python 3.4, or Python 3.3 with asyncio
installed, passing ``async_=True`` will make this return an
:mod:`asyncio` Future, which you can yield from to get the same
result that this method would normally give directly.
"""
# Split up multiline commands and feed them in bit-by-bit
cmdlines = command.splitlines()
# splitlines ignores trailing newlines - add it back in manually
if command.endswith('\n'):
cmdlines.append('')
if not cmdlines:
raise ValueError("No command was given")
if async_:
from ._async import repl_run_command_async
return repl_run_command_async(self, cmdlines, timeout)
res = []
self.child.sendline(cmdlines[0])
for line in cmdlines[1:]:
self._expect_prompt(timeout=timeout)
res.append(self.child.before)
self.child.sendline(line)
# Command was fully submitted, now wait for the next prompt
if self._expect_prompt(timeout=timeout) == 1:
# We got the continuation prompt - command was incomplete
self.child.kill(signal.SIGINT)
self._expect_prompt(timeout=1)
raise ValueError("Continuation prompt found - input was incomplete:\n"
+ command)
return u''.join(res + [self.child.before])
def python(command="python"):
"""Start a Python shell and return a :class:`REPLWrapper` object."""
return REPLWrapper(command, u">>> ", u"import sys; sys.ps1={0!r}; sys.ps2={1!r}")
def bash(command="bash"):
"""Start a bash shell and return a :class:`REPLWrapper` object."""
bashrc = os.path.join(os.path.dirname(__file__), 'bashrc.sh')
child = pexpect.spawn(command, ['--rcfile', bashrc], echo=False,
encoding='utf-8')
# If the user runs 'env', the value of PS1 will be in the output. To avoid
# replwrap seeing that as the next prompt, we'll embed the marker characters
# for invisible characters in the prompt; these show up when inspecting the
# environment variable, but not when bash displays the prompt.
ps1 = PEXPECT_PROMPT[:5] + u'\\[\\]' + PEXPECT_PROMPT[5:]
ps2 = PEXPECT_CONTINUATION_PROMPT[:5] + u'\\[\\]' + PEXPECT_CONTINUATION_PROMPT[5:]
prompt_change = u"PS1='{0}' PS2='{1}' PROMPT_COMMAND=''".format(ps1, ps2)
return REPLWrapper(child, u'\\$', prompt_change,
extra_init_cmd="export PAGER=cat")

157
plugins/git_clone/pexpect/run.py Normal file
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import sys
import types
from .exceptions import EOF, TIMEOUT
from .pty_spawn import spawn
def run(command, timeout=30, withexitstatus=False, events=None,
extra_args=None, logfile=None, cwd=None, env=None, **kwargs):
'''
This function runs the given command; waits for it to finish; then
returns all output as a string. STDERR is included in output. If the full
path to the command is not given then the path is searched.
Note that lines are terminated by CR/LF (\\r\\n) combination even on
UNIX-like systems because this is the standard for pseudottys. If you set
'withexitstatus' to true, then run will return a tuple of (command_output,
exitstatus). If 'withexitstatus' is false then this returns just
command_output.
The run() function can often be used instead of creating a spawn instance.
For example, the following code uses spawn::
from pexpect import *
child = spawn('scp foo user@example.com:.')
child.expect('(?i)password')
child.sendline(mypassword)
The previous code can be replace with the following::
from pexpect import *
run('scp foo user@example.com:.', events={'(?i)password': mypassword})
**Examples**
Start the apache daemon on the local machine::
from pexpect import *
run("/usr/local/apache/bin/apachectl start")
Check in a file using SVN::
from pexpect import *
run("svn ci -m 'automatic commit' my_file.py")
Run a command and capture exit status::
from pexpect import *
(command_output, exitstatus) = run('ls -l /bin', withexitstatus=1)
The following will run SSH and execute 'ls -l' on the remote machine. The
password 'secret' will be sent if the '(?i)password' pattern is ever seen::
run("ssh username@machine.example.com 'ls -l'",
events={'(?i)password':'secret\\n'})
This will start mencoder to rip a video from DVD. This will also display
progress ticks every 5 seconds as it runs. For example::
from pexpect import *
def print_ticks(d):
print d['event_count'],
run("mencoder dvd://1 -o video.avi -oac copy -ovc copy",
events={TIMEOUT:print_ticks}, timeout=5)
The 'events' argument should be either a dictionary or a tuple list that
contains patterns and responses. Whenever one of the patterns is seen
in the command output, run() will send the associated response string.
So, run() in the above example can be also written as:
run("mencoder dvd://1 -o video.avi -oac copy -ovc copy",
events=[(TIMEOUT,print_ticks)], timeout=5)
Use a tuple list for events if the command output requires a delicate
control over what pattern should be matched, since the tuple list is passed
to pexpect() as its pattern list, with the order of patterns preserved.
Note that you should put newlines in your string if Enter is necessary.
Like the example above, the responses may also contain a callback, either
a function or method. It should accept a dictionary value as an argument.
The dictionary contains all the locals from the run() function, so you can
access the child spawn object or any other variable defined in run()
(event_count, child, and extra_args are the most useful). A callback may
return True to stop the current run process. Otherwise run() continues
until the next event. A callback may also return a string which will be
sent to the child. 'extra_args' is not used by directly run(). It provides
a way to pass data to a callback function through run() through the locals
dictionary passed to a callback.
Like :class:`spawn`, passing *encoding* will make it work with unicode
instead of bytes. You can pass *codec_errors* to control how errors in
encoding and decoding are handled.
'''
if timeout == -1:
child = spawn(command, maxread=2000, logfile=logfile, cwd=cwd, env=env,
**kwargs)
else:
child = spawn(command, timeout=timeout, maxread=2000, logfile=logfile,
cwd=cwd, env=env, **kwargs)
if isinstance(events, list):
patterns= [x for x,y in events]
responses = [y for x,y in events]
elif isinstance(events, dict):
patterns = list(events.keys())
responses = list(events.values())
else:
# This assumes EOF or TIMEOUT will eventually cause run to terminate.
patterns = None
responses = None
child_result_list = []
event_count = 0
while True:
try:
index = child.expect(patterns)
if isinstance(child.after, child.allowed_string_types):
child_result_list.append(child.before + child.after)
else:
# child.after may have been a TIMEOUT or EOF,
# which we don't want appended to the list.
child_result_list.append(child.before)
if isinstance(responses[index], child.allowed_string_types):
child.send(responses[index])
elif (isinstance(responses[index], types.FunctionType) or
isinstance(responses[index], types.MethodType)):
callback_result = responses[index](locals())
sys.stdout.flush()
if isinstance(callback_result, child.allowed_string_types):
child.send(callback_result)
elif callback_result:
break
else:
raise TypeError("parameter `event' at index {index} must be "
"a string, method, or function: {value!r}"
.format(index=index, value=responses[index]))
event_count = event_count + 1
except TIMEOUT:
child_result_list.append(child.before)
break
except EOF:
child_result_list.append(child.before)
break
child_result = child.string_type().join(child_result_list)
if withexitstatus:
child.close()
return (child_result, child.exitstatus)
else:
return child_result
def runu(command, timeout=30, withexitstatus=False, events=None,
extra_args=None, logfile=None, cwd=None, env=None, **kwargs):
"""Deprecated: pass encoding to run() instead.
"""
kwargs.setdefault('encoding', 'utf-8')
return run(command, timeout=timeout, withexitstatus=withexitstatus,
events=events, extra_args=extra_args, logfile=logfile, cwd=cwd,
env=env, **kwargs)

431
plugins/git_clone/pexpect/screen.py Normal file
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'''This implements a virtual screen. This is used to support ANSI terminal
emulation. The screen representation and state is implemented in this class.
Most of the methods are inspired by ANSI screen control codes. The
:class:`~pexpect.ANSI.ANSI` class extends this class to add parsing of ANSI
escape codes.
PEXPECT LICENSE
This license is approved by the OSI and FSF as GPL-compatible.
http://opensource.org/licenses/isc-license.txt
Copyright (c) 2012, Noah Spurrier <noah@noah.org>
PERMISSION TO USE, COPY, MODIFY, AND/OR DISTRIBUTE THIS SOFTWARE FOR ANY
PURPOSE WITH OR WITHOUT FEE IS HEREBY GRANTED, PROVIDED THAT THE ABOVE
COPYRIGHT NOTICE AND THIS PERMISSION NOTICE APPEAR IN ALL COPIES.
THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
'''
import codecs
import copy
import sys
import warnings
warnings.warn(("pexpect.screen and pexpect.ANSI are deprecated. "
"We recommend using pyte to emulate a terminal screen: "
"https://pypi.python.org/pypi/pyte"),
stacklevel=2)
NUL = 0 # Fill character; ignored on input.
ENQ = 5 # Transmit answerback message.
BEL = 7 # Ring the bell.
BS = 8 # Move cursor left.
HT = 9 # Move cursor to next tab stop.
LF = 10 # Line feed.
VT = 11 # Same as LF.
FF = 12 # Same as LF.
CR = 13 # Move cursor to left margin or newline.
SO = 14 # Invoke G1 character set.
SI = 15 # Invoke G0 character set.
XON = 17 # Resume transmission.
XOFF = 19 # Halt transmission.
CAN = 24 # Cancel escape sequence.
SUB = 26 # Same as CAN.
ESC = 27 # Introduce a control sequence.
DEL = 127 # Fill character; ignored on input.
SPACE = u' ' # Space or blank character.
PY3 = (sys.version_info[0] >= 3)
if PY3:
unicode = str
def constrain (n, min, max):
'''This returns a number, n constrained to the min and max bounds. '''
if n < min:
return min
if n > max:
return max
return n
class screen:
'''This object maintains the state of a virtual text screen as a
rectangular array. This maintains a virtual cursor position and handles
scrolling as characters are added. This supports most of the methods needed
by an ANSI text screen. Row and column indexes are 1-based (not zero-based,
like arrays).
Characters are represented internally using unicode. Methods that accept
input characters, when passed 'bytes' (which in Python 2 is equivalent to
'str'), convert them from the encoding specified in the 'encoding'
parameter to the constructor. Methods that return screen contents return
unicode strings, with the exception of __str__() under Python 2. Passing
``encoding=None`` limits the API to only accept unicode input, so passing
bytes in will raise :exc:`TypeError`.
'''
def __init__(self, r=24, c=80, encoding='latin-1', encoding_errors='replace'):
'''This initializes a blank screen of the given dimensions.'''
self.rows = r
self.cols = c
self.encoding = encoding
self.encoding_errors = encoding_errors
if encoding is not None:
self.decoder = codecs.getincrementaldecoder(encoding)(encoding_errors)
else:
self.decoder = None
self.cur_r = 1
self.cur_c = 1
self.cur_saved_r = 1
self.cur_saved_c = 1
self.scroll_row_start = 1
self.scroll_row_end = self.rows
self.w = [ [SPACE] * self.cols for _ in range(self.rows)]
def _decode(self, s):
'''This converts from the external coding system (as passed to
the constructor) to the internal one (unicode). '''
if self.decoder is not None:
return self.decoder.decode(s)
else:
raise TypeError("This screen was constructed with encoding=None, "
"so it does not handle bytes.")
def _unicode(self):
'''This returns a printable representation of the screen as a unicode
string (which, under Python 3.x, is the same as 'str'). The end of each
screen line is terminated by a newline.'''
return u'\n'.join ([ u''.join(c) for c in self.w ])
if PY3:
__str__ = _unicode
else:
__unicode__ = _unicode
def __str__(self):
'''This returns a printable representation of the screen. The end of
each screen line is terminated by a newline. '''
encoding = self.encoding or 'ascii'
return self._unicode().encode(encoding, 'replace')
def dump (self):
'''This returns a copy of the screen as a unicode string. This is similar to
__str__/__unicode__ except that lines are not terminated with line
feeds.'''
return u''.join ([ u''.join(c) for c in self.w ])
def pretty (self):
'''This returns a copy of the screen as a unicode string with an ASCII
text box around the screen border. This is similar to
__str__/__unicode__ except that it adds a box.'''
top_bot = u'+' + u'-'*self.cols + u'+\n'
return top_bot + u'\n'.join([u'|'+line+u'|' for line in unicode(self).split(u'\n')]) + u'\n' + top_bot
def fill (self, ch=SPACE):
if isinstance(ch, bytes):
ch = self._decode(ch)
self.fill_region (1,1,self.rows,self.cols, ch)
def fill_region (self, rs,cs, re,ce, ch=SPACE):
if isinstance(ch, bytes):
ch = self._decode(ch)
rs = constrain (rs, 1, self.rows)
re = constrain (re, 1, self.rows)
cs = constrain (cs, 1, self.cols)
ce = constrain (ce, 1, self.cols)
if rs > re:
rs, re = re, rs
if cs > ce:
cs, ce = ce, cs
for r in range (rs, re+1):
for c in range (cs, ce + 1):
self.put_abs (r,c,ch)
def cr (self):
'''This moves the cursor to the beginning (col 1) of the current row.
'''
self.cursor_home (self.cur_r, 1)
def lf (self):
'''This moves the cursor down with scrolling.
'''
old_r = self.cur_r
self.cursor_down()
if old_r == self.cur_r:
self.scroll_up ()
self.erase_line()
def crlf (self):
'''This advances the cursor with CRLF properties.
The cursor will line wrap and the screen may scroll.
'''
self.cr ()
self.lf ()
def newline (self):
'''This is an alias for crlf().
'''
self.crlf()
def put_abs (self, r, c, ch):
'''Screen array starts at 1 index.'''
r = constrain (r, 1, self.rows)
c = constrain (c, 1, self.cols)
if isinstance(ch, bytes):
ch = self._decode(ch)[0]
else:
ch = ch[0]
self.w[r-1][c-1] = ch
def put (self, ch):
'''This puts a characters at the current cursor position.
'''
if isinstance(ch, bytes):
ch = self._decode(ch)
self.put_abs (self.cur_r, self.cur_c, ch)
def insert_abs (self, r, c, ch):
'''This inserts a character at (r,c). Everything under
and to the right is shifted right one character.
The last character of the line is lost.
'''
if isinstance(ch, bytes):
ch = self._decode(ch)
r = constrain (r, 1, self.rows)
c = constrain (c, 1, self.cols)
for ci in range (self.cols, c, -1):
self.put_abs (r,ci, self.get_abs(r,ci-1))
self.put_abs (r,c,ch)
def insert (self, ch):
if isinstance(ch, bytes):
ch = self._decode(ch)
self.insert_abs (self.cur_r, self.cur_c, ch)
def get_abs (self, r, c):
r = constrain (r, 1, self.rows)
c = constrain (c, 1, self.cols)
return self.w[r-1][c-1]
def get (self):
self.get_abs (self.cur_r, self.cur_c)
def get_region (self, rs,cs, re,ce):
'''This returns a list of lines representing the region.
'''
rs = constrain (rs, 1, self.rows)
re = constrain (re, 1, self.rows)
cs = constrain (cs, 1, self.cols)
ce = constrain (ce, 1, self.cols)
if rs > re:
rs, re = re, rs
if cs > ce:
cs, ce = ce, cs
sc = []
for r in range (rs, re+1):
line = u''
for c in range (cs, ce + 1):
ch = self.get_abs (r,c)
line = line + ch
sc.append (line)
return sc
def cursor_constrain (self):
'''This keeps the cursor within the screen area.
'''
self.cur_r = constrain (self.cur_r, 1, self.rows)
self.cur_c = constrain (self.cur_c, 1, self.cols)
def cursor_home (self, r=1, c=1): # <ESC>[{ROW};{COLUMN}H
self.cur_r = r
self.cur_c = c
self.cursor_constrain ()
def cursor_back (self,count=1): # <ESC>[{COUNT}D (not confused with down)
self.cur_c = self.cur_c - count
self.cursor_constrain ()
def cursor_down (self,count=1): # <ESC>[{COUNT}B (not confused with back)
self.cur_r = self.cur_r + count
self.cursor_constrain ()
def cursor_forward (self,count=1): # <ESC>[{COUNT}C
self.cur_c = self.cur_c + count
self.cursor_constrain ()
def cursor_up (self,count=1): # <ESC>[{COUNT}A
self.cur_r = self.cur_r - count
self.cursor_constrain ()
def cursor_up_reverse (self): # <ESC> M (called RI -- Reverse Index)
old_r = self.cur_r
self.cursor_up()
if old_r == self.cur_r:
self.scroll_up()
def cursor_force_position (self, r, c): # <ESC>[{ROW};{COLUMN}f
'''Identical to Cursor Home.'''
self.cursor_home (r, c)
def cursor_save (self): # <ESC>[s
'''Save current cursor position.'''
self.cursor_save_attrs()
def cursor_unsave (self): # <ESC>[u
'''Restores cursor position after a Save Cursor.'''
self.cursor_restore_attrs()
def cursor_save_attrs (self): # <ESC>7
'''Save current cursor position.'''
self.cur_saved_r = self.cur_r
self.cur_saved_c = self.cur_c
def cursor_restore_attrs (self): # <ESC>8
'''Restores cursor position after a Save Cursor.'''
self.cursor_home (self.cur_saved_r, self.cur_saved_c)
def scroll_constrain (self):
'''This keeps the scroll region within the screen region.'''
if self.scroll_row_start <= 0:
self.scroll_row_start = 1
if self.scroll_row_end > self.rows:
self.scroll_row_end = self.rows
def scroll_screen (self): # <ESC>[r
'''Enable scrolling for entire display.'''
self.scroll_row_start = 1
self.scroll_row_end = self.rows
def scroll_screen_rows (self, rs, re): # <ESC>[{start};{end}r
'''Enable scrolling from row {start} to row {end}.'''
self.scroll_row_start = rs
self.scroll_row_end = re
self.scroll_constrain()
def scroll_down (self): # <ESC>D
'''Scroll display down one line.'''
# Screen is indexed from 1, but arrays are indexed from 0.
s = self.scroll_row_start - 1
e = self.scroll_row_end - 1
self.w[s+1:e+1] = copy.deepcopy(self.w[s:e])
def scroll_up (self): # <ESC>M
'''Scroll display up one line.'''
# Screen is indexed from 1, but arrays are indexed from 0.
s = self.scroll_row_start - 1
e = self.scroll_row_end - 1
self.w[s:e] = copy.deepcopy(self.w[s+1:e+1])
def erase_end_of_line (self): # <ESC>[0K -or- <ESC>[K
'''Erases from the current cursor position to the end of the current
line.'''
self.fill_region (self.cur_r, self.cur_c, self.cur_r, self.cols)
def erase_start_of_line (self): # <ESC>[1K
'''Erases from the current cursor position to the start of the current
line.'''
self.fill_region (self.cur_r, 1, self.cur_r, self.cur_c)
def erase_line (self): # <ESC>[2K
'''Erases the entire current line.'''
self.fill_region (self.cur_r, 1, self.cur_r, self.cols)
def erase_down (self): # <ESC>[0J -or- <ESC>[J
'''Erases the screen from the current line down to the bottom of the
screen.'''
self.erase_end_of_line ()
self.fill_region (self.cur_r + 1, 1, self.rows, self.cols)
def erase_up (self): # <ESC>[1J
'''Erases the screen from the current line up to the top of the
screen.'''
self.erase_start_of_line ()
self.fill_region (self.cur_r-1, 1, 1, self.cols)
def erase_screen (self): # <ESC>[2J
'''Erases the screen with the background color.'''
self.fill ()
def set_tab (self): # <ESC>H
'''Sets a tab at the current position.'''
pass
def clear_tab (self): # <ESC>[g
'''Clears tab at the current position.'''
pass
def clear_all_tabs (self): # <ESC>[3g
'''Clears all tabs.'''
pass
# Insert line Esc [ Pn L
# Delete line Esc [ Pn M
# Delete character Esc [ Pn P
# Scrolling region Esc [ Pn(top);Pn(bot) r

525
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from io import StringIO, BytesIO
import codecs
import os
import sys
import re
import errno
from .exceptions import ExceptionPexpect, EOF, TIMEOUT
from .expect import Expecter, searcher_string, searcher_re
PY3 = (sys.version_info[0] >= 3)
text_type = str if PY3 else unicode
class _NullCoder(object):
"""Pass bytes through unchanged."""
@staticmethod
def encode(b, final=False):
return b
@staticmethod
def decode(b, final=False):
return b
class SpawnBase(object):
"""A base class providing the backwards-compatible spawn API for Pexpect.
This should not be instantiated directly: use :class:`pexpect.spawn` or
:class:`pexpect.fdpexpect.fdspawn`.
"""
encoding = None
pid = None
flag_eof = False
def __init__(self, timeout=30, maxread=2000, searchwindowsize=None,
logfile=None, encoding=None, codec_errors='strict'):
self.stdin = sys.stdin
self.stdout = sys.stdout
self.stderr = sys.stderr
self.searcher = None
self.ignorecase = False
self.before = None
self.after = None
self.match = None
self.match_index = None
self.terminated = True
self.exitstatus = None
self.signalstatus = None
# status returned by os.waitpid
self.status = None
# the child file descriptor is initially closed
self.child_fd = -1
self.timeout = timeout
self.delimiter = EOF
self.logfile = logfile
# input from child (read_nonblocking)
self.logfile_read = None
# output to send (send, sendline)
self.logfile_send = None
# max bytes to read at one time into buffer
self.maxread = maxread
# Data before searchwindowsize point is preserved, but not searched.
self.searchwindowsize = searchwindowsize
# Delay used before sending data to child. Time in seconds.
# Set this to None to skip the time.sleep() call completely.
self.delaybeforesend = 0.05
# Used by close() to give kernel time to update process status.
# Time in seconds.
self.delayafterclose = 0.1
# Used by terminate() to give kernel time to update process status.
# Time in seconds.
self.delayafterterminate = 0.1
# Delay in seconds to sleep after each call to read_nonblocking().
# Set this to None to skip the time.sleep() call completely: that
# would restore the behavior from pexpect-2.0 (for performance
# reasons or because you don't want to release Python's global
# interpreter lock).
self.delayafterread = 0.0001
self.softspace = False
self.name = '<' + repr(self) + '>'
self.closed = True
# Unicode interface
self.encoding = encoding
self.codec_errors = codec_errors
if encoding is None:
# bytes mode (accepts some unicode for backwards compatibility)
self._encoder = self._decoder = _NullCoder()
self.string_type = bytes
self.buffer_type = BytesIO
self.crlf = b'\r\n'
if PY3:
self.allowed_string_types = (bytes, str)
self.linesep = os.linesep.encode('ascii')
def write_to_stdout(b):
try:
return sys.stdout.buffer.write(b)
except AttributeError:
# If stdout has been replaced, it may not have .buffer
return sys.stdout.write(b.decode('ascii', 'replace'))
self.write_to_stdout = write_to_stdout
else:
self.allowed_string_types = (basestring,) # analysis:ignore
self.linesep = os.linesep
self.write_to_stdout = sys.stdout.write
else:
# unicode mode
self._encoder = codecs.getincrementalencoder(encoding)(codec_errors)
self._decoder = codecs.getincrementaldecoder(encoding)(codec_errors)
self.string_type = text_type
self.buffer_type = StringIO
self.crlf = u'\r\n'
self.allowed_string_types = (text_type, )
if PY3:
self.linesep = os.linesep
else:
self.linesep = os.linesep.decode('ascii')
# This can handle unicode in both Python 2 and 3
self.write_to_stdout = sys.stdout.write
# storage for async transport
self.async_pw_transport = None
# This is the read buffer. See maxread.
self._buffer = self.buffer_type()
# The buffer may be trimmed for efficiency reasons. This is the
# untrimmed buffer, used to create the before attribute.
self._before = self.buffer_type()
def _log(self, s, direction):
if self.logfile is not None:
self.logfile.write(s)
self.logfile.flush()
second_log = self.logfile_send if (direction=='send') else self.logfile_read
if second_log is not None:
second_log.write(s)
second_log.flush()
# For backwards compatibility, in bytes mode (when encoding is None)
# unicode is accepted for send and expect. Unicode mode is strictly unicode
# only.
def _coerce_expect_string(self, s):
if self.encoding is None and not isinstance(s, bytes):
return s.encode('ascii')
return s
def _coerce_send_string(self, s):
if self.encoding is None and not isinstance(s, bytes):
return s.encode('utf-8')
return s
def _get_buffer(self):
return self._buffer.getvalue()
def _set_buffer(self, value):
self._buffer = self.buffer_type()
self._buffer.write(value)
# This property is provided for backwards compatability (self.buffer used
# to be a string/bytes object)
buffer = property(_get_buffer, _set_buffer)
def read_nonblocking(self, size=1, timeout=None):
"""This reads data from the file descriptor.
This is a simple implementation suitable for a regular file. Subclasses using ptys or pipes should override it.
The timeout parameter is ignored.
"""
try:
s = os.read(self.child_fd, size)
except OSError as err:
if err.args[0] == errno.EIO:
# Linux-style EOF
self.flag_eof = True
raise EOF('End Of File (EOF). Exception style platform.')
raise
if s == b'':
# BSD-style EOF
self.flag_eof = True
raise EOF('End Of File (EOF). Empty string style platform.')
s = self._decoder.decode(s, final=False)
self._log(s, 'read')
return s
def _pattern_type_err(self, pattern):
raise TypeError('got {badtype} ({badobj!r}) as pattern, must be one'
' of: {goodtypes}, pexpect.EOF, pexpect.TIMEOUT'\
.format(badtype=type(pattern),
badobj=pattern,
goodtypes=', '.join([str(ast)\
for ast in self.allowed_string_types])
)
)
def compile_pattern_list(self, patterns):
'''This compiles a pattern-string or a list of pattern-strings.
Patterns must be a StringType, EOF, TIMEOUT, SRE_Pattern, or a list of
those. Patterns may also be None which results in an empty list (you
might do this if waiting for an EOF or TIMEOUT condition without
expecting any pattern).
This is used by expect() when calling expect_list(). Thus expect() is
nothing more than::
cpl = self.compile_pattern_list(pl)
return self.expect_list(cpl, timeout)
If you are using expect() within a loop it may be more
efficient to compile the patterns first and then call expect_list().
This avoid calls in a loop to compile_pattern_list()::
cpl = self.compile_pattern_list(my_pattern)
while some_condition:
...
i = self.expect_list(cpl, timeout)
...
'''
if patterns is None:
return []
if not isinstance(patterns, list):
patterns = [patterns]
# Allow dot to match \n
compile_flags = re.DOTALL
if self.ignorecase:
compile_flags = compile_flags | re.IGNORECASE
compiled_pattern_list = []
for idx, p in enumerate(patterns):
if isinstance(p, self.allowed_string_types):
p = self._coerce_expect_string(p)
compiled_pattern_list.append(re.compile(p, compile_flags))
elif p is EOF:
compiled_pattern_list.append(EOF)
elif p is TIMEOUT:
compiled_pattern_list.append(TIMEOUT)
elif isinstance(p, type(re.compile(''))):
compiled_pattern_list.append(p)
else:
self._pattern_type_err(p)
return compiled_pattern_list
def expect(self, pattern, timeout=-1, searchwindowsize=-1, async_=False, **kw):
'''This seeks through the stream until a pattern is matched. The
pattern is overloaded and may take several types. The pattern can be a
StringType, EOF, a compiled re, or a list of any of those types.
Strings will be compiled to re types. This returns the index into the
pattern list. If the pattern was not a list this returns index 0 on a
successful match. This may raise exceptions for EOF or TIMEOUT. To
avoid the EOF or TIMEOUT exceptions add EOF or TIMEOUT to the pattern
list. That will cause expect to match an EOF or TIMEOUT condition
instead of raising an exception.
If you pass a list of patterns and more than one matches, the first
match in the stream is chosen. If more than one pattern matches at that
point, the leftmost in the pattern list is chosen. For example::
# the input is 'foobar'
index = p.expect(['bar', 'foo', 'foobar'])
# returns 1('foo') even though 'foobar' is a "better" match
Please note, however, that buffering can affect this behavior, since
input arrives in unpredictable chunks. For example::
# the input is 'foobar'
index = p.expect(['foobar', 'foo'])
# returns 0('foobar') if all input is available at once,
# but returns 1('foo') if parts of the final 'bar' arrive late
When a match is found for the given pattern, the class instance
attribute *match* becomes an re.MatchObject result. Should an EOF
or TIMEOUT pattern match, then the match attribute will be an instance
of that exception class. The pairing before and after class
instance attributes are views of the data preceding and following
the matching pattern. On general exception, class attribute
*before* is all data received up to the exception, while *match* and
*after* attributes are value None.
When the keyword argument timeout is -1 (default), then TIMEOUT will
raise after the default value specified by the class timeout
attribute. When None, TIMEOUT will not be raised and may block
indefinitely until match.
When the keyword argument searchwindowsize is -1 (default), then the
value specified by the class maxread attribute is used.
A list entry may be EOF or TIMEOUT instead of a string. This will
catch these exceptions and return the index of the list entry instead
of raising the exception. The attribute 'after' will be set to the
exception type. The attribute 'match' will be None. This allows you to
write code like this::
index = p.expect(['good', 'bad', pexpect.EOF, pexpect.TIMEOUT])
if index == 0:
do_something()
elif index == 1:
do_something_else()
elif index == 2:
do_some_other_thing()
elif index == 3:
do_something_completely_different()
instead of code like this::
try:
index = p.expect(['good', 'bad'])
if index == 0:
do_something()
elif index == 1:
do_something_else()
except EOF:
do_some_other_thing()
except TIMEOUT:
do_something_completely_different()
These two forms are equivalent. It all depends on what you want. You
can also just expect the EOF if you are waiting for all output of a
child to finish. For example::
p = pexpect.spawn('/bin/ls')
p.expect(pexpect.EOF)
print p.before
If you are trying to optimize for speed then see expect_list().
On Python 3.4, or Python 3.3 with asyncio installed, passing
``async_=True`` will make this return an :mod:`asyncio` coroutine,
which you can yield from to get the same result that this method would
normally give directly. So, inside a coroutine, you can replace this code::
index = p.expect(patterns)
With this non-blocking form::
index = yield from p.expect(patterns, async_=True)
'''
if 'async' in kw:
async_ = kw.pop('async')
if kw:
raise TypeError("Unknown keyword arguments: {}".format(kw))
compiled_pattern_list = self.compile_pattern_list(pattern)
return self.expect_list(compiled_pattern_list,
timeout, searchwindowsize, async_)
def expect_list(self, pattern_list, timeout=-1, searchwindowsize=-1,
async_=False, **kw):
'''This takes a list of compiled regular expressions and returns the
index into the pattern_list that matched the child output. The list may
also contain EOF or TIMEOUT(which are not compiled regular
expressions). This method is similar to the expect() method except that
expect_list() does not recompile the pattern list on every call. This
may help if you are trying to optimize for speed, otherwise just use
the expect() method. This is called by expect().
Like :meth:`expect`, passing ``async_=True`` will make this return an
asyncio coroutine.
'''
if timeout == -1:
timeout = self.timeout
if 'async' in kw:
async_ = kw.pop('async')
if kw:
raise TypeError("Unknown keyword arguments: {}".format(kw))
exp = Expecter(self, searcher_re(pattern_list), searchwindowsize)
if async_:
from ._async import expect_async
return expect_async(exp, timeout)
else:
return exp.expect_loop(timeout)
def expect_exact(self, pattern_list, timeout=-1, searchwindowsize=-1,
async_=False, **kw):
'''This is similar to expect(), but uses plain string matching instead
of compiled regular expressions in 'pattern_list'. The 'pattern_list'
may be a string; a list or other sequence of strings; or TIMEOUT and
EOF.
This call might be faster than expect() for two reasons: string
searching is faster than RE matching and it is possible to limit the
search to just the end of the input buffer.
This method is also useful when you don't want to have to worry about
escaping regular expression characters that you want to match.
Like :meth:`expect`, passing ``async_=True`` will make this return an
asyncio coroutine.
'''
if timeout == -1:
timeout = self.timeout
if 'async' in kw:
async_ = kw.pop('async')
if kw:
raise TypeError("Unknown keyword arguments: {}".format(kw))
if (isinstance(pattern_list, self.allowed_string_types) or
pattern_list in (TIMEOUT, EOF)):
pattern_list = [pattern_list]
def prepare_pattern(pattern):
if pattern in (TIMEOUT, EOF):
return pattern
if isinstance(pattern, self.allowed_string_types):
return self._coerce_expect_string(pattern)
self._pattern_type_err(pattern)
try:
pattern_list = iter(pattern_list)
except TypeError:
self._pattern_type_err(pattern_list)
pattern_list = [prepare_pattern(p) for p in pattern_list]
exp = Expecter(self, searcher_string(pattern_list), searchwindowsize)
if async_:
from ._async import expect_async
return expect_async(exp, timeout)
else:
return exp.expect_loop(timeout)
def expect_loop(self, searcher, timeout=-1, searchwindowsize=-1):
'''This is the common loop used inside expect. The 'searcher' should be
an instance of searcher_re or searcher_string, which describes how and
what to search for in the input.
See expect() for other arguments, return value and exceptions. '''
exp = Expecter(self, searcher, searchwindowsize)
return exp.expect_loop(timeout)
def read(self, size=-1):
'''This reads at most "size" bytes from the file (less if the read hits
EOF before obtaining size bytes). If the size argument is negative or
omitted, read all data until EOF is reached. The bytes are returned as
a string object. An empty string is returned when EOF is encountered
immediately. '''
if size == 0:
return self.string_type()
if size < 0:
# delimiter default is EOF
self.expect(self.delimiter)
return self.before
# I could have done this more directly by not using expect(), but
# I deliberately decided to couple read() to expect() so that
# I would catch any bugs early and ensure consistent behavior.
# It's a little less efficient, but there is less for me to
# worry about if I have to later modify read() or expect().
# Note, it's OK if size==-1 in the regex. That just means it
# will never match anything in which case we stop only on EOF.
cre = re.compile(self._coerce_expect_string('.{%d}' % size), re.DOTALL)
# delimiter default is EOF
index = self.expect([cre, self.delimiter])
if index == 0:
### FIXME self.before should be ''. Should I assert this?
return self.after
return self.before
def readline(self, size=-1):
'''This reads and returns one entire line. The newline at the end of
line is returned as part of the string, unless the file ends without a
newline. An empty string is returned if EOF is encountered immediately.
This looks for a newline as a CR/LF pair (\\r\\n) even on UNIX because
this is what the pseudotty device returns. So contrary to what you may
expect you will receive newlines as \\r\\n.
If the size argument is 0 then an empty string is returned. In all
other cases the size argument is ignored, which is not standard
behavior for a file-like object. '''
if size == 0:
return self.string_type()
# delimiter default is EOF
index = self.expect([self.crlf, self.delimiter])
if index == 0:
return self.before + self.crlf
else:
return self.before
def __iter__(self):
'''This is to support iterators over a file-like object.
'''
return iter(self.readline, self.string_type())
def readlines(self, sizehint=-1):
'''This reads until EOF using readline() and returns a list containing
the lines thus read. The optional 'sizehint' argument is ignored.
Remember, because this reads until EOF that means the child
process should have closed its stdout. If you run this method on
a child that is still running with its stdout open then this
method will block until it timesout.'''
lines = []
while True:
line = self.readline()
if not line:
break
lines.append(line)
return lines
def fileno(self):
'''Expose file descriptor for a file-like interface
'''
return self.child_fd
def flush(self):
'''This does nothing. It is here to support the interface for a
File-like object. '''
pass
def isatty(self):
"""Overridden in subclass using tty"""
return False
# For 'with spawn(...) as child:'
def __enter__(self):
return self
def __exit__(self, etype, evalue, tb):
# We rely on subclasses to implement close(). If they don't, it's not
# clear what a context manager should do.
self.close()

187
plugins/git_clone/pexpect/utils.py Normal file
View File

@ -0,0 +1,187 @@
import os
import sys
import stat
import select
import time
import errno
try:
InterruptedError
except NameError:
# Alias Python2 exception to Python3
InterruptedError = select.error
if sys.version_info[0] >= 3:
string_types = (str,)
else:
string_types = (unicode, str)
def is_executable_file(path):
"""Checks that path is an executable regular file, or a symlink towards one.
This is roughly ``os.path isfile(path) and os.access(path, os.X_OK)``.
"""
# follow symlinks,
fpath = os.path.realpath(path)
if not os.path.isfile(fpath):
# non-files (directories, fifo, etc.)
return False
mode = os.stat(fpath).st_mode
if (sys.platform.startswith('sunos')
and os.getuid() == 0):
# When root on Solaris, os.X_OK is True for *all* files, irregardless
# of their executability -- instead, any permission bit of any user,
# group, or other is fine enough.
#
# (This may be true for other "Unix98" OS's such as HP-UX and AIX)
return bool(mode & (stat.S_IXUSR |
stat.S_IXGRP |
stat.S_IXOTH))
return os.access(fpath, os.X_OK)
def which(filename, env=None):
'''This takes a given filename; tries to find it in the environment path;
then checks if it is executable. This returns the full path to the filename
if found and executable. Otherwise this returns None.'''
# Special case where filename contains an explicit path.
if os.path.dirname(filename) != '' and is_executable_file(filename):
return filename
if env is None:
env = os.environ
p = env.get('PATH')
if not p:
p = os.defpath
pathlist = p.split(os.pathsep)
for path in pathlist:
ff = os.path.join(path, filename)
if is_executable_file(ff):
return ff
return None
def split_command_line(command_line):
'''This splits a command line into a list of arguments. It splits arguments
on spaces, but handles embedded quotes, doublequotes, and escaped
characters. It's impossible to do this with a regular expression, so I
wrote a little state machine to parse the command line. '''
arg_list = []
arg = ''
# Constants to name the states we can be in.
state_basic = 0
state_esc = 1
state_singlequote = 2
state_doublequote = 3
# The state when consuming whitespace between commands.
state_whitespace = 4
state = state_basic
for c in command_line:
if state == state_basic or state == state_whitespace:
if c == '\\':
# Escape the next character
state = state_esc
elif c == r"'":
# Handle single quote
state = state_singlequote
elif c == r'"':
# Handle double quote
state = state_doublequote
elif c.isspace():
# Add arg to arg_list if we aren't in the middle of whitespace.
if state == state_whitespace:
# Do nothing.
None
else:
arg_list.append(arg)
arg = ''
state = state_whitespace
else:
arg = arg + c
state = state_basic
elif state == state_esc:
arg = arg + c
state = state_basic
elif state == state_singlequote:
if c == r"'":
state = state_basic
else:
arg = arg + c
elif state == state_doublequote:
if c == r'"':
state = state_basic
else:
arg = arg + c
if arg != '':
arg_list.append(arg)
return arg_list
def select_ignore_interrupts(iwtd, owtd, ewtd, timeout=None):
'''This is a wrapper around select.select() that ignores signals. If
select.select raises a select.error exception and errno is an EINTR
error then it is ignored. Mainly this is used to ignore sigwinch
(terminal resize). '''
# if select() is interrupted by a signal (errno==EINTR) then
# we loop back and enter the select() again.
if timeout is not None:
end_time = time.time() + timeout
while True:
try:
return select.select(iwtd, owtd, ewtd, timeout)
except InterruptedError:
err = sys.exc_info()[1]
if err.args[0] == errno.EINTR:
# if we loop back we have to subtract the
# amount of time we already waited.
if timeout is not None:
timeout = end_time - time.time()
if timeout < 0:
return([], [], [])
else:
# something else caused the select.error, so
# this actually is an exception.
raise
def poll_ignore_interrupts(fds, timeout=None):
'''Simple wrapper around poll to register file descriptors and
ignore signals.'''
if timeout is not None:
end_time = time.time() + timeout
poller = select.poll()
for fd in fds:
poller.register(fd, select.POLLIN | select.POLLPRI | select.POLLHUP | select.POLLERR)
while True:
try:
timeout_ms = None if timeout is None else timeout * 1000
results = poller.poll(timeout_ms)
return [afd for afd, _ in results]
except InterruptedError:
err = sys.exc_info()[1]
if err.args[0] == errno.EINTR:
# if we loop back we have to subtract the
# amount of time we already waited.
if timeout is not None:
timeout = end_time - time.time()
if timeout < 0:
return []
else:
# something else caused the select.error, so
# this actually is an exception.
raise

40
plugins/git_clone/plugin.py
View File

@ -5,6 +5,7 @@ import subprocess
import time
# Lib imports
from . import pexpect
import gi
gi.require_version('Gtk', '3.0')
from gi.repository import Gtk
@ -21,6 +22,10 @@ def threaded(fn):
class GitClonePluginException(Exception):
...
class Plugin(PluginBase):
def __init__(self):
@ -42,9 +47,38 @@ class Plugin(PluginBase):
def _do_download(self, widget=None, eve=None):
self._event_system.emit("get_current_state")
self.get_user_and_pass()
dir = self._fm_state.tab.get_current_directory()
self._download(dir)
events = {
'(?i)Username': self.get_user(),
'(?i)Password': self.get_pass()
}
self._download(dir, events)
@threaded
def _download(self, dir):
subprocess.Popen([f'{self.path}/download.sh', dir])
def _download(self, dir, _events):
git_clone_link = self.get_clipboard_data()
pexpect.run(f"git clone {git_clone_link}", cwd = dir, events=_events)
def get_user_and_pass(self):
response = self._fm_state.user_pass_dialog.run()
if response in (-4, -6):
raise GitClonePluginException("User canceled request...")
def get_user(self):
user = self._fm_state.user_pass_dialog.user_input.get_text()
return f"{user}\n"
def get_pass(self):
passwd = self._fm_state.user_pass_dialog.pass_input.get_text()
return f"{passwd}\n"
def get_clipboard_data(self, encoding="utf-8") -> str:
proc = subprocess.Popen(['xclip','-selection', 'clipboard', '-o'], stdout=subprocess.PIPE)
retcode = proc.wait()
data = proc.stdout.read()
return data.decode(encoding).strip()

6
plugins/translate/brotli/__init__.py Normal file
View File

@ -0,0 +1,6 @@
# -*- coding: utf-8 -*-
# flake8: noqa
from .brotli import (
decompress, Decompressor, compress, BrotliEncoderMode, DEFAULT_MODE,
Compressor, MODE_GENERIC, MODE_TEXT, MODE_FONT, error, Error
)

466
plugins/translate/brotli/brotli.py Normal file
View File

@ -0,0 +1,466 @@
# -*- coding: utf-8 -*-
import math
import enum
from ._brotli import ffi, lib
class Error(Exception):
"""
Raised whenever an error is encountered with compressing or decompressing
data using brotlipy.
.. versionadded:: 0.5.1
"""
pass
#: An alias of :class:`Error <brotli.Error>` that exists for compatibility with
#: the original C brotli module.
#:
#: .. versionadded: 0.5.1
error = Error
class BrotliEncoderMode(enum.IntEnum):
"""
Compression modes for the Brotli encoder.
.. versionadded:: 0.5.0
"""
#: Default compression mode. The compressor does not know anything in
#: advance about the properties of the input.
GENERIC = lib.BROTLI_MODE_GENERIC
#: Compression mode for UTF-8 format text input.
TEXT = lib.BROTLI_MODE_TEXT
#: Compression mode used in WOFF 2.0
FONT = lib.BROTLI_MODE_FONT
# Define some names for compatibility with the C module.
#: The default compression mode for brotli.
DEFAULT_MODE = BrotliEncoderMode(lib.BROTLI_DEFAULT_MODE)
#: A compression mode where the compressor does not know anything in advance
#: about the properties of the input.
#:
#: .. note:: This name is defined for compatibility with the Brotli C
#: extension. If you're not interested in that compatibility, it is
#: recommended that you use :class:`BrotliEncoderMode
#: <brotli.BrotliEncoderMode>` instead.
#:
#: .. versionadded:: 0.5.0
MODE_GENERIC = BrotliEncoderMode.GENERIC
#: A compression mode for UTF-8 format text input.
#:
#: .. note:: This name is defined for compatibility with the Brotli C
#: extension. If you're not interested in that compatibility, it is
#: recommended that you use :class:`BrotliEncoderMode
#: <brotli.BrotliEncoderMode>` instead.
#:
#: .. versionadded:: 0.5.0
MODE_TEXT = BrotliEncoderMode.TEXT
#: The compression mode used in WOFF 2.0.
#:
#: .. note:: This name is defined for compatibility with the Brotli C
#: extension. If you're not interested in that compatibility, it is
#: recommended that you use :class:`BrotliEncoderMode
#: <brotli.BrotliEncoderMode>` instead.
#:
#: .. versionadded:: 0.5.0
MODE_FONT = BrotliEncoderMode.FONT
def decompress(data):
"""
Decompress a complete Brotli-compressed string.
:param data: A bytestring containing Brotli-compressed data.
"""
d = Decompressor()
data = d.decompress(data)
d.finish()
return data
def compress(data,
mode=DEFAULT_MODE,
quality=lib.BROTLI_DEFAULT_QUALITY,
lgwin=lib.BROTLI_DEFAULT_WINDOW,
lgblock=0,
dictionary=b''):
"""
Compress a string using Brotli.
.. versionchanged:: 0.5.0
Added ``mode``, ``quality``, `lgwin``, ``lgblock``, and ``dictionary``
parameters.
:param data: A bytestring containing the data to compress.
:type data: ``bytes``
:param mode: The encoder mode.
:type mode: :class:`BrotliEncoderMode` or ``int``
:param quality: Controls the compression-speed vs compression-density
tradeoffs. The higher the quality, the slower the compression. The
range of this value is 0 to 11.
:type quality: ``int``
:param lgwin: The base-2 logarithm of the sliding window size. The range of
this value is 10 to 24.
:type lgwin: ``int``
:param lgblock: The base-2 logarithm of the maximum input block size. The
range of this value is 16 to 24. If set to 0, the value will be set
based on ``quality``.
:type lgblock: ``int``
:param dictionary: A pre-set dictionary for LZ77. Please use this with
caution: if a dictionary is used for compression, the same dictionary
**must** be used for decompression!
:type dictionary: ``bytes``
:returns: The compressed bytestring.
:rtype: ``bytes``
"""
# This method uses private variables on the Compressor object, and
# generally does a whole lot of stuff that's not supported by the public
# API. The goal here is to minimise the number of allocations and copies
# we have to do. Users should prefer this method over the Compressor if
# they know they have single-shot data.
compressor = Compressor(
mode=mode,
quality=quality,
lgwin=lgwin,
lgblock=lgblock,
dictionary=dictionary
)
compressed_data = compressor._compress(data, lib.BROTLI_OPERATION_FINISH)
assert lib.BrotliEncoderIsFinished(compressor._encoder) == lib.BROTLI_TRUE
assert (
lib.BrotliEncoderHasMoreOutput(compressor._encoder) == lib.BROTLI_FALSE
)
return compressed_data
def _validate_mode(val):
"""
Validate that the mode is valid.
"""
try:
val = BrotliEncoderMode(val)
except ValueError:
raise Error("%s is not a valid encoder mode" % val)
def _validate_quality(val):
"""
Validate that the quality setting is valid.
"""
if not (0 <= val <= 11):
raise Error(
"%d is not a valid quality, must be between 0 and 11" % val
)
def _validate_lgwin(val):
"""
Validate that the lgwin setting is valid.
"""
if not (10 <= val <= 24):
raise Error("%d is not a valid lgwin, must be between 10 and 24" % val)
def _validate_lgblock(val):
"""
Validate that the lgblock setting is valid.
"""
if (val != 0) and not (16 <= val <= 24):
raise Error(
"%d is not a valid lgblock, must be either 0 or between 16 and 24"
% val
)
def _set_parameter(encoder, parameter, parameter_name, val):
"""
This helper function sets a specific Brotli encoder parameter, checking
the return code and raising :class:`Error <brotli.Error>` if it is
invalid.
"""
rc = lib.BrotliEncoderSetParameter(encoder, parameter, val)
if parameter == lib.BROTLI_PARAM_MODE:
_validate_mode(val)
elif parameter == lib.BROTLI_PARAM_QUALITY:
_validate_quality(val)
elif parameter == lib.BROTLI_PARAM_LGWIN:
_validate_lgwin(val)
elif parameter == lib.BROTLI_PARAM_LGBLOCK:
_validate_lgblock(val)
else: # pragma: no cover
raise RuntimeError("Unexpected parameter!")
# This block is defensive: I see no way to hit it, but as long as the
# function returns a value we can live in hope that the brotli folks will
# enforce their own constraints.
if rc != lib.BROTLI_TRUE: # pragma: no cover
raise Error(
"Error setting parameter %s: %d" % (parameter_name, val)
)
class Compressor(object):
"""
An object that allows for streaming compression of data using the Brotli
compression algorithm.
.. versionadded:: 0.5.0
:param mode: The encoder mode.
:type mode: :class:`BrotliEncoderMode` or ``int``
:param quality: Controls the compression-speed vs compression-density
tradeoffs. The higher the quality, the slower the compression. The
range of this value is 0 to 11.
:type quality: ``int``
:param lgwin: The base-2 logarithm of the sliding window size. The range of
this value is 10 to 24.
:type lgwin: ``int``
:param lgblock: The base-2 logarithm of the maximum input block size. The
range of this value is 16 to 24. If set to 0, the value will be set
based on ``quality``.
:type lgblock: ``int``
:param dictionary: A pre-set dictionary for LZ77. Please use this with
caution: if a dictionary is used for compression, the same dictionary
**must** be used for decompression!
:type dictionary: ``bytes``
"""
_dictionary = None
_dictionary_size = None
def __init__(self,
mode=DEFAULT_MODE,
quality=lib.BROTLI_DEFAULT_QUALITY,
lgwin=lib.BROTLI_DEFAULT_WINDOW,
lgblock=0,
dictionary=b''):
enc = lib.BrotliEncoderCreateInstance(
ffi.NULL, ffi.NULL, ffi.NULL
)
if not enc: # pragma: no cover
raise RuntimeError("Unable to allocate Brotli encoder!")
enc = ffi.gc(enc, lib.BrotliEncoderDestroyInstance)
# Configure the encoder appropriately.
_set_parameter(enc, lib.BROTLI_PARAM_MODE, "mode", mode)
_set_parameter(enc, lib.BROTLI_PARAM_QUALITY, "quality", quality)
_set_parameter(enc, lib.BROTLI_PARAM_LGWIN, "lgwin", lgwin)
_set_parameter(enc, lib.BROTLI_PARAM_LGBLOCK, "lgblock", lgblock)
if dictionary:
self._dictionary = ffi.new("uint8_t []", dictionary)
self._dictionary_size = len(dictionary)
lib.BrotliEncoderSetCustomDictionary(
enc, self._dictionary_size, self._dictionary
)
self._encoder = enc
def _compress(self, data, operation):
"""
This private method compresses some data in a given mode. This is used
because almost all of the code uses the exact same setup. It wouldn't
have to, but it doesn't hurt at all.
"""
# The 'algorithm' for working out how big to make this buffer is from
# the Brotli source code, brotlimodule.cc.
original_output_size = int(
math.ceil(len(data) + (len(data) >> 2) + 10240)
)
available_out = ffi.new("size_t *")
available_out[0] = original_output_size
output_buffer = ffi.new("uint8_t []", available_out[0])
ptr_to_output_buffer = ffi.new("uint8_t **", output_buffer)
input_size = ffi.new("size_t *", len(data))
input_buffer = ffi.new("uint8_t []", data)
ptr_to_input_buffer = ffi.new("uint8_t **", input_buffer)
rc = lib.BrotliEncoderCompressStream(
self._encoder,
operation,
input_size,
ptr_to_input_buffer,
available_out,
ptr_to_output_buffer,
ffi.NULL
)
if rc != lib.BROTLI_TRUE: # pragma: no cover
raise Error("Error encountered compressing data.")
assert not input_size[0]
size_of_output = original_output_size - available_out[0]
return ffi.buffer(output_buffer, size_of_output)[:]
def compress(self, data):
"""
Incrementally compress more data.
:param data: A bytestring containing data to compress.
:returns: A bytestring containing some compressed data. May return the
empty bytestring if not enough data has been inserted into the
compressor to create the output yet.
"""
return self._compress(data, lib.BROTLI_OPERATION_PROCESS)
def flush(self):
"""
Flush the compressor. This will emit the remaining output data, but
will not destroy the compressor. It can be used, for example, to ensure
that given chunks of content will decompress immediately.
"""
chunks = []
chunks.append(self._compress(b'', lib.BROTLI_OPERATION_FLUSH))
while lib.BrotliEncoderHasMoreOutput(self._encoder) == lib.BROTLI_TRUE:
chunks.append(self._compress(b'', lib.BROTLI_OPERATION_FLUSH))
return b''.join(chunks)
def finish(self):
"""
Finish the compressor. This will emit the remaining output data and
transition the compressor to a completed state. The compressor cannot
be used again after this point, and must be replaced.
"""
chunks = []
while lib.BrotliEncoderIsFinished(self._encoder) == lib.BROTLI_FALSE:
chunks.append(self._compress(b'', lib.BROTLI_OPERATION_FINISH))
return b''.join(chunks)
class Decompressor(object):
"""
An object that allows for streaming decompression of Brotli-compressed
data.
.. versionchanged:: 0.5.0
Added ``dictionary`` parameter.
:param dictionary: A pre-set dictionary for LZ77. Please use this with
caution: if a dictionary is used for compression, the same dictionary
**must** be used for decompression!
:type dictionary: ``bytes``
"""
_dictionary = None
_dictionary_size = None
def __init__(self, dictionary=b''):
dec = lib.BrotliDecoderCreateInstance(ffi.NULL, ffi.NULL, ffi.NULL)
self._decoder = ffi.gc(dec, lib.BrotliDecoderDestroyInstance)
if dictionary:
self._dictionary = ffi.new("uint8_t []", dictionary)
self._dictionary_size = len(dictionary)
lib.BrotliDecoderSetCustomDictionary(
self._decoder,
self._dictionary_size,
self._dictionary
)
def decompress(self, data):
"""
Decompress part of a complete Brotli-compressed string.
:param data: A bytestring containing Brotli-compressed data.
:returns: A bytestring containing the decompressed data.
"""
chunks = []
available_in = ffi.new("size_t *", len(data))
in_buffer = ffi.new("uint8_t[]", data)
next_in = ffi.new("uint8_t **", in_buffer)
while True:
# Allocate a buffer that's hopefully overlarge, but if it's not we
# don't mind: we'll spin around again.
buffer_size = 5 * len(data)
available_out = ffi.new("size_t *", buffer_size)
out_buffer = ffi.new("uint8_t[]", buffer_size)
next_out = ffi.new("uint8_t **", out_buffer)
rc = lib.BrotliDecoderDecompressStream(self._decoder,
available_in,
next_in,
available_out,
next_out,
ffi.NULL)
# First, check for errors.
if rc == lib.BROTLI_DECODER_RESULT_ERROR:
error_code = lib.BrotliDecoderGetErrorCode(self._decoder)
error_message = lib.BrotliDecoderErrorString(error_code)
raise Error(
"Decompression error: %s" % ffi.string(error_message)
)
# Next, copy the result out.
chunk = ffi.buffer(out_buffer, buffer_size - available_out[0])[:]
chunks.append(chunk)
if rc == lib.BROTLI_DECODER_RESULT_NEEDS_MORE_INPUT:
assert available_in[0] == 0
break
elif rc == lib.BROTLI_DECODER_RESULT_SUCCESS:
break
else:
# It's cool if we need more output, we just loop again.
assert rc == lib.BROTLI_DECODER_RESULT_NEEDS_MORE_OUTPUT
return b''.join(chunks)
def flush(self):
"""
Complete the decompression, return whatever data is remaining to be
decompressed.
.. deprecated:: 0.4.0
This method is no longer required, as decompress() will now
decompress eagerly.
:returns: A bytestring containing the remaining decompressed data.
"""
return b''
def finish(self):
"""
Finish the decompressor. As the decompressor decompresses eagerly, this
will never actually emit any data. However, it will potentially throw
errors if a truncated or damaged data stream has been used.
Note that, once this method is called, the decompressor is no longer
safe for further use and must be thrown away.
"""
assert (
lib.BrotliDecoderHasMoreOutput(self._decoder) == lib.BROTLI_FALSE
)
if lib.BrotliDecoderIsFinished(self._decoder) == lib.BROTLI_FALSE:
raise Error("Decompression error: incomplete compressed stream.")
return b''

224
plugins/translate/brotli/build.py Normal file
View File

@ -0,0 +1,224 @@
# -*- coding: utf-8 -*-
import sys
from cffi import FFI
ffi = FFI()
libraries = ['libbrotli']
if 'win32' not in str(sys.platform).lower():
libraries.append('stdc++')
ffi.set_source(
"_brotli",
"""#include <brotli/decode.h>
#include <brotli/encode.h>
""",
libraries=libraries,
include_dirs=["libbrotli", "libbrotli/include"]
)
ffi.cdef("""
/* common/types.h */
typedef bool BROTLI_BOOL;
#define BROTLI_TRUE ...
#define BROTLI_FALSE ...
/* dec/state.h */
/* Allocating function pointer. Function MUST return 0 in the case of
failure. Otherwise it MUST return a valid pointer to a memory region of
at least size length. Neither items nor size are allowed to be 0.
opaque argument is a pointer provided by client and could be used to
bind function to specific object (memory pool). */
typedef void* (*brotli_alloc_func)(void* opaque, size_t size);
/* Deallocating function pointer. Function SHOULD be no-op in the case the
address is 0. */
typedef void (*brotli_free_func)(void* opaque, void* address);
/* dec/decode.h */
typedef enum {
/* Decoding error, e.g. corrupt input or memory allocation problem */
BROTLI_DECODER_RESULT_ERROR = 0,
/* Decoding successfully completed */
BROTLI_DECODER_RESULT_SUCCESS = 1,
/* Partially done; should be called again with more input */
BROTLI_DECODER_RESULT_NEEDS_MORE_INPUT = 2,
/* Partially done; should be called again with more output */
BROTLI_DECODER_RESULT_NEEDS_MORE_OUTPUT = 3
} BrotliDecoderResult;
typedef enum {...} BrotliDecoderErrorCode;
typedef ... BrotliDecoderState;
/* Creates the instance of BrotliDecoderState and initializes it.
|alloc_func| and |free_func| MUST be both zero or both non-zero. In the
case they are both zero, default memory allocators are used. |opaque| is
passed to |alloc_func| and |free_func| when they are called. */
BrotliDecoderState* BrotliDecoderCreateInstance(brotli_alloc_func,
brotli_free_func,
void *);
/* Deinitializes and frees BrotliDecoderState instance. */
void BrotliDecoderDestroyInstance(BrotliDecoderState* state);
/* Decompresses the data. Supports partial input and output.
Must be called with an allocated input buffer in |*next_in| and an
allocated output buffer in |*next_out|. The values |*available_in| and
|*available_out| must specify the allocated size in |*next_in| and
|*next_out| respectively.
After each call, |*available_in| will be decremented by the amount of
input bytes consumed, and the |*next_in| pointer will be incremented by
that amount. Similarly, |*available_out| will be decremented by the
amount of output bytes written, and the |*next_out| pointer will be
incremented by that amount. |total_out|, if it is not a null-pointer,
will be set to the number of bytes decompressed since the last state
initialization.
Input is never overconsumed, so |next_in| and |available_in| could be
passed to the next consumer after decoding is complete. */
BrotliDecoderResult BrotliDecoderDecompressStream(BrotliDecoderState* s,
size_t* available_in,
const uint8_t** next_in,
size_t* available_out,
uint8_t** next_out,
size_t* total_out);
/* Fills the new state with a dictionary for LZ77, warming up the
ringbuffer, e.g. for custom static dictionaries for data formats.
Not to be confused with the built-in transformable dictionary of Brotli.
|size| should be less or equal to 2^24 (16MiB), otherwise the dictionary
will be ignored. The dictionary must exist in memory until decoding is
done and is owned by the caller. To use:
1) Allocate and initialize state with BrotliCreateInstance
2) Use BrotliSetCustomDictionary
3) Use BrotliDecompressStream
4) Clean up and free state with BrotliDestroyState
*/
void BrotliDecoderSetCustomDictionary(
BrotliDecoderState* s, size_t size, const uint8_t* dict);
/* Returns true, if decoder has some unconsumed output.
Otherwise returns false. */
BROTLI_BOOL BrotliDecoderHasMoreOutput(const BrotliDecoderState* s);
/* Returns true, if decoder has already received some input bytes.
Otherwise returns false. */
BROTLI_BOOL BrotliDecoderIsUsed(const BrotliDecoderState* s);
/* Returns true, if decoder is in a state where we reached the end of the
input and produced all of the output; returns false otherwise. */
BROTLI_BOOL BrotliDecoderIsFinished(const BrotliDecoderState* s);
/* Returns detailed error code after BrotliDecompressStream returns
BROTLI_DECODER_RESULT_ERROR. */
BrotliDecoderErrorCode BrotliDecoderGetErrorCode(
const BrotliDecoderState* s);
const char* BrotliDecoderErrorString(BrotliDecoderErrorCode c);
/* enc/encode.h */
typedef ... BrotliEncoderState;
typedef enum BrotliEncoderParameter {
BROTLI_PARAM_MODE = 0,
/* Controls the compression-speed vs compression-density tradeoffs. The
higher the quality, the slower the compression. Range is 0 to 11. */
BROTLI_PARAM_QUALITY = 1,
/* Base 2 logarithm of the sliding window size. Range is 10 to 24. */
BROTLI_PARAM_LGWIN = 2,
/* Base 2 logarithm of the maximum input block size. Range is 16 to 24.
If set to 0, the value will be set based on the quality. */
BROTLI_PARAM_LGBLOCK = 3
} BrotliEncoderParameter;
typedef enum BrotliEncoderMode {
/* Default compression mode. The compressor does not know anything in
advance about the properties of the input. */
BROTLI_MODE_GENERIC = 0,
/* Compression mode for UTF-8 format text input. */
BROTLI_MODE_TEXT = 1,
/* Compression mode used in WOFF 2.0. */
BROTLI_MODE_FONT = 2
} BrotliEncoderMode;
int BROTLI_DEFAULT_QUALITY = 11;
int BROTLI_DEFAULT_WINDOW = 22;
#define BROTLI_DEFAULT_MODE ...
typedef enum BrotliEncoderOperation {
BROTLI_OPERATION_PROCESS = 0,
/* Request output stream to flush. Performed when input stream is
depleted and there is enough space in output stream. */
BROTLI_OPERATION_FLUSH = 1,
/* Request output stream to finish. Performed when input stream is
depleted and there is enough space in output stream. */
BROTLI_OPERATION_FINISH = 2
} BrotliEncoderOperation;
/* Creates the instance of BrotliEncoderState and initializes it.
|alloc_func| and |free_func| MUST be both zero or both non-zero. In the
case they are both zero, default memory allocators are used. |opaque| is
passed to |alloc_func| and |free_func| when they are called. */
BrotliEncoderState* BrotliEncoderCreateInstance(brotli_alloc_func,
brotli_free_func,
void *);
/* Deinitializes and frees BrotliEncoderState instance. */
void BrotliEncoderDestroyInstance(BrotliEncoderState* state);
/* Compresses the data in |input_buffer| into |encoded_buffer|, and sets
|*encoded_size| to the compressed length.
BROTLI_DEFAULT_QUALITY, BROTLI_DEFAULT_WINDOW and BROTLI_DEFAULT_MODE
should be used as |quality|, |lgwin| and |mode| if there are no specific
requirements to encoder speed and compression ratio.
If compression fails, |*encoded_size| is set to 0.
If BrotliEncoderMaxCompressedSize(|input_size|) is not zero, then
|*encoded_size| is never set to the bigger value.
Returns false if there was an error and true otherwise. */
BROTLI_BOOL BrotliEncoderCompress(int quality,
int lgwin,
BrotliEncoderMode mode,
size_t input_size,
const uint8_t* input_buffer,
size_t* encoded_size,
uint8_t* encoded_buffer);
BROTLI_BOOL BrotliEncoderCompressStream(BrotliEncoderState* s,
BrotliEncoderOperation op,
size_t* available_in,
const uint8_t** next_in,
size_t* available_out,
uint8_t** next_out,
size_t* total_out);
BROTLI_BOOL BrotliEncoderSetParameter(BrotliEncoderState* state,
BrotliEncoderParameter p,
uint32_t value);
/* Fills the new state with a dictionary for LZ77, warming up the
ringbuffer, e.g. for custom static dictionaries for data formats.
Not to be confused with the built-in transformable dictionary of Brotli.
To decode, use BrotliSetCustomDictionary() of the decoder with the same
dictionary. */
void BrotliEncoderSetCustomDictionary(BrotliEncoderState* state,
size_t size,
const uint8_t* dict);
/* Check if encoder is in "finished" state, i.e. no more input is
acceptable and no more output will be produced.
Works only with BrotliEncoderCompressStream workflow.
Returns 1 if stream is finished and 0 otherwise. */
BROTLI_BOOL BrotliEncoderIsFinished(BrotliEncoderState* s);
/* Check if encoder has more output bytes in internal buffer.
Works only with BrotliEncoderCompressStream workflow.
Returns 1 if has more output (in internal buffer) and 0 otherwise. */
BROTLI_BOOL BrotliEncoderHasMoreOutput(BrotliEncoderState* s);
""")
if __name__ == '__main__':
ffi.compile()

32
plugins/translate/plugin.py
View File

@ -3,6 +3,8 @@ import os
import time
import threading
import requests
import json
from . import brotli
# Lib imports
import gi
@ -141,25 +143,45 @@ class Plugin(PluginBase):
response = requests.post(tlink, headers=self._headers, data=from_translate)
if response.status_code == 200:
data = response.json()
self._translate_to_buffer.set_text(data["translated"])
data = self.get_data(response)
self.translate_tries = 0
self._translate_to_buffer.set_text(data["translated"])
if data["detected_language"]:
self._detected_language_lbl.set_label(f"Detected Language: {data['detected_language']}")
else:
self._detected_language_lbl.set_label(f"Selected Language: {self.from_trans}")
elif response.status_code >= 400 or response.status_code < 500:
self.get_vqd()
if not self.translate_tries > 4:
if not self.translate_tries > 2:
self._translate()
else:
msg = f"Could not translate... Response Code: {response.status_code}"
self._translate_to_buffer.set_text(msg)
def get_data(self, response):
data = None
try:
data = response.json()
except Exception as e:
...
try:
data = json.loads(response.text)
except Exception as e:
...
try:
decompress_str = brotli.decompress(response.content).decode("utf-8")
data = json.loads(decompress_str)
except Exception as e:
...
return data
# NOTE: https://github.com/deedy5/duckduckgo_search/blob/72acb900a346be576f0917dd3d6c0fbd618a71bf/duckduckgo_search/utils.py
def get_vqd(self):
response = requests.post(self.vqd_link, headers=self.vqd_headers, data=self.vqd_data, timeout=10)
response = requests.post(self.vqd_link, headers=self.vqd_headers, data=self.vqd_data, timeout=2)
if response.status_code == 200:
data = response.content
vqd_start_index = data.index(b"vqd='") + 5

BIN
src/versions/solarfm-0.0.1/solarfm/..o Normal file
View File

Binary file not shown.

5
src/versions/solarfm-0.0.1/solarfm/core/controller.py
View File

@ -56,11 +56,12 @@ class Controller(UIMixin, SignalsMixins, Controller_Data):
def _setup_styling(self):
...
def _setup_signals(self):
self.window.connect("focus-out-event", self.unset_keys_and_data)
self.window.connect("key-press-event", self.on_global_key_press_controller)
self.window.connect("key-release-event", self.on_global_key_release_controller)
def _setup_signals(self):
FileSystemActions()
def _subscribe_to_events(self):

3
src/versions/solarfm-0.0.1/solarfm/core/controller_data.py
View File

@ -10,6 +10,7 @@ from gi.repository import Gtk
# Application imports
from .widgets.dialogs.message_widget import MessageWidget
from .widgets.dialogs.user_pass_widget import UserPassWidget
from shellfm.windows.controller import WindowController
from plugins.plugins_controller import PluginsController
@ -31,6 +32,7 @@ class State:
to_copy_files: [] = None
to_cut_files: [] = None
message_dialog: type = None
user_pass_dialog: type = None
class Controller_Data:
@ -90,6 +92,7 @@ class Controller_Data:
# state.icon_grid = event_system.emit_and_await("get_files_view_icon_grid", (state.wid, state.tid))
state.store = state.icon_grid.get_model()
state.message_dialog = MessageWidget()
state.user_pass_dialog = UserPassWidget()
selected_files = state.icon_grid.get_selected_items()
if selected_files:

2
src/versions/solarfm-0.0.1/solarfm/core/mixins/signals/file_action_signals_mixin.py
View File

@ -36,10 +36,10 @@ class FileActionSignalsMixin:
# NOTE: Too lazy to impliment a proper update handler and so just regen store and update tab.
# Use a lock system to prevent too many update calls for certain instances but user can manually refresh if they have urgency
def dir_watch_updates(self, file_monitor, file, other_file=None, eve_type=None, data=None):
if eve_type == Gio.FileMonitorEvent.CHANGES_DONE_HINT:
if eve_type in [Gio.FileMonitorEvent.CREATED, Gio.FileMonitorEvent.DELETED,
Gio.FileMonitorEvent.RENAMED, Gio.FileMonitorEvent.MOVED_IN,
Gio.FileMonitorEvent.MOVED_OUT]:
if settings.is_debug():
logger.debug(eve_type)
if eve_type in [Gio.FileMonitorEvent.MOVED_IN, Gio.FileMonitorEvent.MOVED_OUT]:

3
src/versions/solarfm-0.0.1/solarfm/core/mixins/ui/tab_mixin.py
View File

@ -54,6 +54,9 @@ class TabMixin(GridMixin):
def close_tab(self, button, eve=None):
notebook = button.get_parent().get_parent()
if notebook.get_n_pages() == 1:
return
wid = int(notebook.get_name()[-1])
tid = self.get_id_from_tab_box(button.get_parent())
scroll = self.builder.get_object(f"{wid}|{tid}")

63
src/versions/solarfm-0.0.1/solarfm/core/widgets/dialogs/user_pass_widget.py Normal file
View File

@ -0,0 +1,63 @@
# Python imports
# Lib imports
import gi
gi.require_version('Gtk', '3.0')
from gi.repository import Gtk
from gi.repository import Gdk
# Application imports
class UserPassWidget(Gtk.Dialog):
"""docstring for UserPassWidget."""
def __init__(self):
super(UserPassWidget, self).__init__()
self.user_input = Gtk.Entry()
self.pass_input = Gtk.Entry()
self._setup_styling()
self._setup_signals()
self._subscribe_to_events()
self._load_widgets()
def _setup_styling(self):
self.set_modal(True)
self.set_type_hint(Gdk.WindowTypeHint.DIALOG)
self.user_input.set_placeholder_text("User:")
self.pass_input.set_placeholder_text("Password:")
self.pass_input.set_visibility(False)
def _setup_signals(self):
# self.connect("response", self.on_response)
...
def _subscribe_to_events(self):
...
def _load_widgets(self):
vbox = self.get_content_area()
label = Gtk.Label(label="User & Password")
vbox.add(label)
vbox.add(self.user_input)
vbox.add(self.pass_input)
vbox.show_all()
self.add_buttons(Gtk.STOCK_CANCEL, Gtk.ResponseType.CANCEL,
"Skip Input", Gtk.ResponseType.CLOSE,
"Submit Input", Gtk.ResponseType.OK
)
def do_response(self, response_id):
self.hide()
return response_id
# def on_response(self, widget, response_id):
# self.hide()
# return response_id

5
src/versions/solarfm-0.0.1/solarfm/core/widgets/files_view/tab_mixin.py
View File

@ -52,10 +52,11 @@ class TabMixin(GridMixin):
self.set_file_watcher(tab)
def close_tab(self, button, eve=None):
notebook = button.get_parent().get_parent()
if notebook.get_n_pages() == 1:
return
wid = int(notebook.get_name()[-1])
tid = self.get_id_from_tab_box(button.get_parent())
scroll = self.builder.get_object(f"{wid}|{tid}")

6
src/versions/solarfm-0.0.1/solarfm/core/widgets/tab_header_widget.py
View File

@ -10,7 +10,7 @@ from gi.repository import Gtk
class TabHeaderWidget(Gtk.ButtonBox):
class TabHeaderWidget(Gtk.Box):
"""docstring for TabHeaderWidget"""
def __init__(self, tab, close_tab):
@ -26,6 +26,7 @@ class TabHeaderWidget(Gtk.ButtonBox):
def _setup_styling(self):
self.set_orientation(0)
self.set_hexpand(False)
def _setup_signals(self):
...
@ -39,6 +40,9 @@ class TabHeaderWidget(Gtk.ButtonBox):
label.set_label(f"{self._tab.get_end_of_path()}")
label.set_width_chars(len(self._tab.get_end_of_path()))
label.set_xalign(0.0)
label.set_margin_left(25)
label.set_margin_right(25)
label.set_hexpand(True)
tid.set_label(f"{self._tab.get_id()}")
close.connect("released", self._close_tab)

6
src/versions/solarfm-0.0.1/solarfm/plugins/plugins_controller.py
View File

@ -10,6 +10,7 @@ from os.path import isdir
import gi
gi.require_version('Gtk', '3.0')
from gi.repository import Gtk
from gi.repository import GLib
from gi.repository import Gio
# Application imports
@ -52,6 +53,7 @@ class PluginsController:
Gio.FileMonitorEvent.MOVED_OUT]:
self.reload_plugins(file)
@daemon_threaded
def load_plugins(self, file: str = None) -> None:
logger.info(f"Loading plugins...")
parent_path = os.getcwd()
@ -66,7 +68,9 @@ class PluginsController:
plugin, loading_data = manifest.get_loading_data()
module = self.load_plugin_module(path, folder, target)
self.execute_plugin(module, plugin, loading_data)
GLib.idle_add(self.execute_plugin, *(module, plugin, loading_data))
# self.execute_plugin(module, plugin, loading_data)
except InvalidPluginException as e:
logger.info(f"Malformed Plugin: Not loading -->: '{folder}' !")
logger.debug("Trace: ", traceback.print_exc())

10
src/versions/solarfm-0.0.1/solarfm/shellfm/windows/tabs/icons/icon.py
View File

@ -49,6 +49,8 @@ class Icon(DesktopIconMixin, VideoIconMixin, MeshsIconMixin):
thumbnl = self.find_thumbnail_from_desktop_file(full_path)
if not thumbnl:
# TODO: Detect if not in a thread and use directly for speed get_system_thumbnail
# thumbnl = self.get_system_thumbnail(full_path, full_path, self.sys_icon_wh[0])
thumbnl = self._get_system_thumbnail_gtk_thread(full_path, self.sys_icon_wh[0])
if not thumbnl:
raise IconException("No known icons found.")
@ -110,7 +112,13 @@ class Icon(DesktopIconMixin, VideoIconMixin, MeshsIconMixin):
elif full_path.lower().endswith(".webp") and PImage:
return self.image2pixbuf(full_path, wxh)
return GdkPixbuf.Pixbuf.new_from_file_at_scale(full_path, wxh[0], wxh[1], True)
pixbuf = None
try:
pixbuf = GdkPixbuf.Pixbuf.new_from_file_at_scale(full_path, wxh[0], wxh[1], True)
except Exception as e:
...
return pixbuf
except IconException as e:
print("Image Scaling Issue:")
print( repr(e) )

4
src/versions/solarfm-0.0.1/solarfm/utils/endpoint_registry.py
View File

@ -3,11 +3,11 @@
# Lib imports
# Application imports
from .singleton import Singleton
class EndpointRegistry():
class EndpointRegistry(Singleton):
def __init__(self):
self._endpoints = {}

4
src/versions/solarfm-0.0.1/solarfm/utils/event_system.py
View File

@ -4,11 +4,11 @@ from collections import defaultdict
# Lib imports
# Application imports
from .singleton import Singleton
class EventSystem:
class EventSystem(Singleton):
""" Create event system. """
def __init__(self):

4
src/versions/solarfm-0.0.1/solarfm/utils/ipc_server.py
View File

@ -8,11 +8,11 @@ from multiprocessing.connection import Listener
from gi.repository import GLib
# Application imports
from .singleton import Singleton
class IPCServer:
class IPCServer(Singleton):
""" Create a listener so that other SolarFM instances send requests back to existing instance. """
def __init__(self, ipc_address: str = '127.0.0.1', conn_type: str = "socket"):
self.is_ipc_alive = False

32
src/versions/solarfm-0.0.1/solarfm/utils/keybindings.py
View File

@ -7,20 +7,20 @@ gi.require_version('Gdk', '3.0')
from gi.repository import Gdk
# Application imports
from .singleton import Singleton
def err(log = ""):
"""Print an error message"""
def logger(log = ""):
print(log)
class KeymapError(Exception):
"""Custom exception for errors in keybinding configurations"""
""" Custom exception for errors in keybinding configurations """
MODIFIER = re.compile('<([^<]+)>')
class Keybindings:
"""Class to handle loading and lookup of Terminator keybindings"""
class Keybindings(Singleton):
""" Class to handle loading and lookup of Terminator keybindings """
modifiers = {
'ctrl': Gdk.ModifierType.CONTROL_MASK,
@ -46,7 +46,7 @@ class Keybindings:
print(self.keys)
def append_bindings(self, combos):
"""Accept new binding(s) and reload"""
""" Accept new binding(s) and reload """
for item in combos:
method, keys = item.split(":")
self.keys[method] = keys
@ -54,12 +54,12 @@ class Keybindings:
self.reload()
def configure(self, bindings):
"""Accept new bindings and reconfigure with them"""
""" Accept new bindings and reconfigure with them """
self.keys = bindings
self.reload()
def reload(self):
"""Parse bindings and mangle into an appropriate form"""
""" Parse bindings and mangle into an appropriate form """
self._lookup = {}
self._masks = 0
@ -77,9 +77,9 @@ class Keybindings:
try:
keyval, mask = self._parsebinding(binding)
# Does much the same, but with poorer error handling.
#keyval, mask = Gtk.accelerator_parse(binding)
# keyval, mask = Gtk.accelerator_parse(binding)
except KeymapError as e:
err ("keybinding reload failed to parse binding '%s': %s" % (binding, e))
logger(f"Keybinding reload failed to parse binding '{binding}': {e}")
else:
if mask & Gdk.ModifierType.SHIFT_MASK:
if keyval == Gdk.KEY_Tab:
@ -98,7 +98,7 @@ class Keybindings:
self._masks |= mask
def _parsebinding(self, binding):
"""Parse an individual binding using Gtk's binding function"""
""" Parse an individual binding using Gtk's binding function """
mask = 0
modifiers = re.findall(MODIFIER, binding)
@ -113,25 +113,25 @@ class Keybindings:
keyval = Gdk.keyval_from_name(key)
if keyval == 0:
raise KeymapError("Key '%s' is unrecognised..." % key)
raise KeymapError(f"Key '{key}' is unrecognised...")
return (keyval, mask)
def _lookup_modifier(self, modifier):
"""Map modifier names to gtk values"""
""" Map modifier names to gtk values """
try:
return self.modifiers[modifier.lower()]
except KeyError:
raise KeymapError("Unhandled modifier '<%s>'" % modifier)
raise KeymapError(f"Unhandled modifier '<{modifier}>'")
def lookup(self, event):
"""Translate a keyboard event into a mapped key"""
""" Translate a keyboard event into a mapped key """
try:
_found, keyval, _egp, _lvl, consumed = self.keymap.translate_keyboard_state(
event.hardware_keycode,
Gdk.ModifierType(event.get_state() & ~Gdk.ModifierType.LOCK_MASK),
event.group)
except TypeError:
err ("Keybinding lookup failed to translate keyboard event: %s" % dir(event))
logger("Keybinding lookup failed to translate keyboard event: {dir(event)}")
return None
mask = (event.get_state() & ~consumed) & self._masks

4
src/versions/solarfm-0.0.1/solarfm/utils/logger.py
View File

@ -3,9 +3,11 @@ import os
import logging
# Application imports
from .singleton import Singleton
class Logger:
class Logger(Singleton):
"""
Create a new logging object and return it.
:note:

25
src/versions/solarfm-0.0.1/solarfm/utils/settings/settings.py
View File

@ -11,11 +11,12 @@ from gi.repository import Gtk
from gi.repository import GLib
# Application imports
from ..singleton import Singleton
from .start_check_mixin import StartCheckMixin
class Settings(StartCheckMixin):
class Settings(StartCheckMixin, Singleton):
def __init__(self):
self._SCRIPT_PTH = os.path.dirname(os.path.realpath(__file__))
self._USER_HOME = path.expanduser('~')
@ -31,6 +32,12 @@ class Settings(StartCheckMixin):
self._KEY_BINDINGS_FILE = f"{self._HOME_CONFIG_PATH}/key-bindings.json"
self._PID_FILE = f"{self._HOME_CONFIG_PATH}/{app_name.lower()}.pid"
self._WINDOW_ICON = f"{self._DEFAULT_ICONS}/icons/{app_name.lower()}.png"
self._UI_WIDEGTS_PATH = f"{self._HOME_CONFIG_PATH}/ui_widgets"
self._CONTEXT_MENU = f"{self._HOME_CONFIG_PATH}/contexct_menu.json"
self._TRASH_FILES_PATH = f"{GLib.get_user_data_dir()}/Trash/files"
self._TRASH_INFO_PATH = f"{GLib.get_user_data_dir()}/Trash/info"
self._ICON_THEME = Gtk.IconTheme.get_default()
if not os.path.exists(self._HOME_CONFIG_PATH):
os.mkdir(self._HOME_CONFIG_PATH)
@ -64,23 +71,25 @@ class Settings(StartCheckMixin):
self._WINDOW_ICON = f"{self._USR_PATH}/icons/{app_name.lower()}.png"
if not os.path.exists(self._WINDOW_ICON):
raise MissingConfigError("Unable to find the application icon.")
if not os.path.exists(self._UI_WIDEGTS_PATH):
self._UI_WIDEGTS_PATH = f"{self._USR_PATH}/ui_widgets"
self._CONTEXT_MENU = f"{self._USR_PATH}/contexct_menu.json"
self._TRASH_FILES_PATH = f"{GLib.get_user_data_dir()}/Trash/files"
self._TRASH_INFO_PATH = f"{GLib.get_user_data_dir()}/Trash/info"
self._ICON_THEME = Gtk.IconTheme.get_default()
if not os.path.exists(self._CONTEXT_MENU):
self._CONTEXT_MENU = f"{self._USR_PATH}/contexct_menu.json"
try:
with open(self._KEY_BINDINGS_FILE) as file:
bindings = json.load(file)["keybindings"]
keybindings.configure(bindings)
except Exception as e:
print( f"Settings: {self._KEY_BINDINGS_FILE}\n\t\t{repr(e)}" )
try:
with open(self._CONTEXT_MENU) as file:
self._context_menu_data = json.load(file)
except Exception as e:
print( f"Settings: {self._CONTEXT_MENU}\n\t\t{repr(e)}" )
self._main_window = None
self._main_window_w = 1670

23
src/versions/solarfm-0.0.1/solarfm/utils/singleton.py Normal file
View File

@ -0,0 +1,23 @@
# Python imports
# Lib imports
# Application imports
class SingletonError(Exception):
pass
class Singleton:
ccount = 0
def __new__(cls, *args, **kwargs):
obj = super(Singleton, cls).__new__(cls)
cls.ccount += 1
if cls.ccount == 2:
raise SingletonError(f"Exceeded {cls.__name__} instantiation limit...")
return obj

2
user_config/usr/share/solarfm/key-bindings.json
View File

@ -6,7 +6,7 @@
"open_terminal" : "F4",
"refresh_tab" : ["F5",
"<Control>r"],
"tggl_top_main_menubar" : "<Alt>h",
"tggl_top_main_menubar" : "<Alt>Alt_L",
"tear_down" : "<Control>q",
"go_up" : "<Control>Up",
"go_home" : "<Control>slash",