Python script + extra files for adding "Add To Steam" as a context menu button in GNOME/KDE

add-to-steam.py

#!/bin/env python

# add-to-steam
#   Adapted from SteamOS Holo's steamos-add-to-steam.sh
# Changes
# - rewrote in Python, added zenity support
#
# License
#   Whatever license the other thing is under as of 2023-12-25
# 
# - Alexandria

import argparse
import mimetypes
import os
import pathlib
import shutil
import sys
import urllib.parse

def add_to_steam(path: str):
    encoded_url = f'steam://addnonsteamgame/{urllib.parse.quote(path, safe="")}'
    pathlib.Path('/tmp/addnonsteamgamefile').touch(exist_ok=True)
    os.system(f'xdg-open {encoded_url}')

def show_error(err: str, show_dialogue_box: bool):
    cmds = [{ 'path': shutil.which('kdialog', os.F_OK)
           ,  'args': f'--title Error --error "{err}"'
           },
           { 'path': shutil.which('zenity', os.F_OK)
           , 'args': f"zenity --error --text='{err}'"
           }]

    if not show_dialogue_box:
        return print(err)

    for cmd in cmds:
        if cmd['path']:
            return os.system(f'{cmd["path"]} {cmd["args"]}') and None

def main():
    args = argparse.ArgumentParser(prog='add-to-steam')
    args.add_argument('-ui', action='store_true', help="Display error graphically")
    args.add_argument('filename', help='Executable to add to Steam')
    options = args.parse_args()

    mime = mimetypes.guess_type(options.filename)[0]
    if mime in ('application/x-desktop', 'application/x-ms-dos-executable'):
        add_to_steam(options.filename, options.ui)
    elif mime in ('application/x-executable',
                  'application/vnd.appimage',
                  'application/x-sh'):
        if os.access(options.filename, os.X_OK):
            add_to_steam(options.filename)
        else:
            show_error('Unable to add non-Steam game. Is the file executable?',
                       options.ui)
    else:
        show_error('Unsupported file type', options.ui)

if __name__ == '__main__':
    main()

dolphin-ctx_add-to-steam

# Adds it to the dolphin 'right click on file' menubar
# Place in /usr/share/kservices5/ServiceMenus/add-to-steam.desktop

[Desktop Entry]
TryExec=steam
Type=Service
X-KDE-ServiceTypes=KonqPopupMenu/Plugin
MimeType=application/x-desktop;application/x-executable;application/vnd.appimage;application/x-shellscript;application/x-ms-dos-executable;
Actions=addToSteam

[Desktop Action addToSteam]
Exec=add-to-steam -ui %u
Icon=steam
Name=Add to Steam

nautilus-ctx_add-to-steam.sh

#!/bin/sh
# Adds it to the nautilus 'right click on file' menubar
# Place in ~/.local/share/nautilus/scripts/nautilus-add-to-steam
add-to-steam -ui $NAUTILUS_SCRIPT_SELECTED_URIS