git.scottworley.com Git - nix-env-apps/blob - apps.py

   1 # nix-env-apps: Manage declarative nix-env with a GUI
   2 #
   3 # This program is free software: you can redistribute it and/or modify it
   4 # under the terms of the GNU General Public License as published by the
   5 # Free Software Foundation, version 3.
   6
   7 import os
   8 import subprocess
   9 from typing import Any, Callable
  10
  11 import gi
  12 gi.require_version("Gtk", "4.0")
  13 from gi.repository import Gtk  # nopep8 pylint: disable=wrong-import-position
  14
  15
  16 def on_edit(_: Any) -> None:
  17     config_dir = os.path.join(
  18         os.environ.get('XDG_CONFIG_HOME', os.path.expanduser('~/.config')),
  19         'nixpkgs',
  20         'overlays')
  21     os.makedirs(config_dir, exist_ok=True)
  22     config_file = os.path.join(config_dir, 'userPackages.nix')
  23     try:
  24         with open(config_file, mode="x", encoding='utf-8') as f:
  25             f.write('''final: prev: {
  26   userPackages = final.buildEnv {
  27     name = "userPackages";
  28     paths = (with final; [
  29
  30
  31
  32     ];
  33   };
  34 }
  35 ''')
  36     except FileExistsError:
  37         pass
  38     subprocess.run(['xdg-open', config_file], check=True)
  39
  40
  41 def try_exec_terminal(terminal: str, args: list[str]) -> None:
  42     try:
  43         os.execvp(terminal, [terminal] + args)
  44     except FileNotFoundError:
  45         pass
  46
  47
  48 def on_apply(_: Any) -> None:
  49     command = ['nix-env', '-riA', 'nixos.userPackages']
  50     command_string = ' '.join(command)
  51     close_string = (
  52         ''' && read -p "SUCCESS: Press ENTER to close this window"''' +
  53         ''' || read -p "FAILURE: Press ENTER to close this window"''')
  54     # This should be a simple `xdg-terminal` invocation, but as of 2025,
  55     # xdg-terminal is extremely broken in Gnome:
  56     #   * It doesn't cause a terminal window to appear
  57     #   * It doesn't run the given command
  58     #   * It exits with status 0, so you can't even tell that it failed
  59     #   * There's no way for the user to configure their preferred terminal?
  60     # So we just try launching a whole bunch of terminals until we find one
  61     # that works
  62     if os.fork() == 0:
  63         try_exec_terminal('kitty', ['sh', '-c', command_string + close_string])
  64         try_exec_terminal(
  65             'alactritty', [
  66                 '-e', 'sh', '-c', command_string + close_string])
  67         try_exec_terminal('kgx', ['--'] + command)
  68         try_exec_terminal(
  69             'konsole', [
  70                 '-e', 'sh', '-c', command_string + close_string])
  71         try_exec_terminal('xfce4-terminal', ['--hold', '-e', command_string])
  72         try_exec_terminal('st', ['sh', '-c', command_string + close_string])
  73         try_exec_terminal(
  74             'urxvt', [
  75                 '-e', 'sh', '-c', command_string + close_string])
  76         try_exec_terminal(
  77             'xterm', [
  78                 '-e', 'sh', '-c', command_string + close_string])
  79
  80         # Don't even try gnome-terminal.  Sometimes it will start, but not run the command,
  81         # and exit with status 0 so we wouldn't even be able to tell that there was a problem.
  82         # try_exec_terminal('gnome-terminal', ['--', 'sh', '-c', command_string + close_string])
  83
  84         # As a last resort, run the command directly, without a terminal, where
  85         # the user probably can't see it.  :(
  86         os.execvp(command[0], command)
  87
  88
  89 def make_button(label: str, action: Callable[[Any], None]) -> Gtk.Button:
  90     button = Gtk.Button(label=label)
  91     button.connect('clicked', action)
  92     button.set_margin_top(10)
  93     button.set_margin_start(10)
  94     button.set_margin_end(10)
  95     button.set_margin_bottom(10)
  96     return button
  97
  98
  99 def on_activate(app: Gtk.Application) -> None:
 100     win = Gtk.ApplicationWindow(application=app)
 101     win.set_title('Apps')
 102     box = Gtk.Box()
 103     box.set_orientation(Gtk.Orientation.VERTICAL)
 104     edit = make_button("Edit Configuration", on_edit)
 105     apply = make_button("Apply Configuration", on_apply)
 106     box.append(edit)
 107     box.append(apply)
 108     win.set_child(box)
 109     win.present()
 110
 111
 112 def main() -> None:
 113     app = Gtk.Application(application_id='net.chkno.nix-env-apps')
 114     app.connect('activate', on_activate)
 115     app.run(None)
 116
 117
 118 if __name__ == '__main__':
 119     main()