[BUG] Opening a non User writable File and saving it causes a traceback

[domsch1988]

Describe the bug
When opening a non User writable file without sudo, ash open the file and let's you make changes. On Saving or Quitting ash crashes and Produces a Traceback. The changes are not written and the User doesn't get information on the issue.

To Reproduce
Steps to reproduce the behavior:

1. Open any system file that isn't writable by the user
2. Make any change to the file
3. Quit or Save and Quit
4. See error

Expected behavior
Some options:

• Inform the User on opening the file that it isn't writable
• Inform on trying to make changes that they can't be saved
• Inform on Saving the File that this isn't possible
• Don't open the file at all with a Feedback on the commandline
  The User needs to get some kind of Feedback on what's happening and some error Handling needs to be in Place.

Log

Traceback (most recent call last):
  File "/home/user/.local/bin/ash", line 33, in <module>
    sys.exit(load_entry_point('ash-editor==0.1.0.dev13', 'console_scripts', 'ash')())
  File "/home/user/.local/lib/python3.10/site-packages/ash/ash_main.py", line 16, in run
    app.run()
  File "/home/user/.local/lib/python3.10/site-packages/ash/main.py", line 128, in run
    ret_code = curses.wrapper(self.app_main)
  File "/usr/lib64/python3.10/curses/__init__.py", line 94, in wrapper
    return func(stdscr, *args, **kwds)
  File "/home/user/.local/lib/python3.10/site-packages/ash/main.py", line 197, in app_main
    self.main_window.show(welcome_msg)		# this call returns when main_window() is closed		
  File "/home/user/.local/lib/python3.10/site-packages/ash/gui/topLevelWindow.py", line 139, in show
    aed.perform_action(ch)
  File "/home/user/.local/lib/python3.10/site-packages/ash/gui/editor.py", line 170, in perform_action
    edit_made = self.keyHandler.handle_keys(ch)
  File "/home/user/.local/lib/python3.10/site-packages/ash/gui/editorKeyHandler.py", line 30, in handle_keys
    self.save_and_close()
  File "/home/user/.local/lib/python3.10/site-packages/ash/gui/editorKeyHandler.py", line 63, in save_and_close
    self.handle_save()
  File "/home/user/.local/lib/python3.10/site-packages/ash/gui/editorKeyHandler.py", line 426, in handle_save
    self.ed.buffer.write_to_disk()
  File "/home/user/.local/lib/python3.10/site-packages/ash/core/bufferManager.py", line 197, in write_to_disk
    self.write_a_copy(self.filename, self.encoding)
  File "/home/user/.local/lib/python3.10/site-packages/ash/core/bufferManager.py", line 184, in write_a_copy
    textFile = codecs.open(filename, "w", encoding)
  File "/usr/lib64/python3.10/codecs.py", line 905, in open
    file = builtins.open(filename, mode, buffering)

Desktop (please complete the following information):

• OS: Fedora 36
• Version 0.1.0 dev12

[akashnag]

Thanks! Will be fixed in the next release.

[akashnag]

Fixed in latest release (0.1.0-dev13)