Handle launch erroring

src/core/widgets/buttons/bottom_button_box.py

@@ -105,6 +105,11 @@ class BottomButtonBox(Gtk.Box):
     def full_init(self, button, eve = None):
         button.hide()
         self.start_stop_lsp(self.start_stop_lsp_btn)
+
+        if not hasattr(self.get_parent(), "lsp_process"):
+            self.rest_buttons()
+            return
+
         self.send_initialize_message(self.initialize_btn)
         self.send_initialized_message(self.initialized_btn)
 
@@ -117,4 +122,4 @@ class BottomButtonBox(Gtk.Box):
         self.request_btn.hide()
         self.full_init_btn.show()
 
-        self.start_stop_lsp_btn.set_image( Gtk.Image.new_from_icon_name("gtk-media-play", Gtk.IconSize.BUTTON) )
+        self.start_stop_lsp_btn.set_image( Gtk.Image.new_from_icon_name("gtk-media-play", Gtk.IconSize.BUTTON) )

src/core/widgets/lsp_message_box.py

@@ -120,7 +120,7 @@ class LSPMessageBox(Gtk.Box):
         self._send_message( LSPRequest(self._message_id, method, params) )
 
     def _send_message(self, data: LSPRequest or LSPNotification):
-        if not data: return
+        if not data or not hasattr(self, "lsp_process"): return
 
         message_str  = json.dumps(data, cls = MessageEncoder)
         message_size = len(message_str)
@@ -163,11 +163,24 @@ class LSPMessageBox(Gtk.Box):
         # _command: str    = parent.command_entry.get_text()
         # _command: str    = parent.socket_entry.get_text()
         command: []      = _command.split() if len( _command.split() ) > 0 else [ _command ]
-        self.lsp_process = subprocess.Popen(
-            command,
-            stdout = subprocess.PIPE,
-            stdin  = subprocess.PIPE
-        )
+        try:
+            self.lsp_process = subprocess.Popen(
+                command,
+                stdout = subprocess.PIPE,
+                stdin  = subprocess.PIPE
+            )
+        except Exception as e:
+            self.bottom_buttons.rest_buttons()
+            self.get_parent().log_list.add_log_entry(
+                "LSP Client Error",
+                LSPResponse(
+                    None,
+                    {
+                        "error": repr(e)
+                    }
+                )
+            )
+            return
 
         return self.lsp_process.pid
 
@@ -183,6 +196,8 @@ class LSPMessageBox(Gtk.Box):
     # Virtually this whole method unabashedly taken from ^ ...
     @daemon_threaded
     def _monitor_lsp_response(self):
+        if not hasattr(self, "lsp_process"): return
+
         with self.read_lock:
             message_size = None
             while True: