Copy user or system GTK themes to flatpak runtimes

flatpak-themes

#!/usr/bin/python3
#licensed under the Apache License, Version 2.0 https://www.apache.org/licenses/LICENSE-2.0
""" Copy GTK themes to flatpak runtimes """
import sys
import shutil
import subprocess
from pathlib import Path

encoding = sys.getfilesystemencoding()

# Current theme
theme = subprocess.check_output(
    ('gsettings', 'get', 'org.gnome.desktop.interface', 'gtk-theme'),
    encoding=encoding).strip().strip("'")

# All user flatpaks
flatpaks = subprocess.check_output(
    ('flatpak', 'list', '--columns=ref', '--user'),
    encoding=encoding).split('\n')

# Gnome runtimes
platforms = [f for f in flatpaks if 'org.gnome.Platform' in f]

# Flatpak themes
themes = [f for f in flatpaks if 'org.gtk.Gtk3theme' in f]

# Theme paths
usertheme = Path.home() / ".local/share/themes" / theme
systemtheme = Path("/usr/share/themes") / theme

# Don't need to do anything if theme is also available as a flatpak
if any([f'.{theme}/' in f for f in themes]):
    print(f'Flatpak theme exists for {theme}, nothing to do')
    sys.exit(0)

# Where is the theme?
if usertheme.is_dir():
    themedir = usertheme
elif systemtheme.is_dir():
    themedir = systemtheme
else:
    print(f'{theme} not found in "~/.local/share/themes" or "/usr/share/themes/"')
    sys.exit(1)

# Copy theme to gnome runtimes
for p in platforms:
    print(f"Copying {theme} to {p}")
    platformdir = Path.home() / ".local/share/flatpak/runtime" / p / "active/files/share/themes"
    shutil.copytree(themedir, platformdir / theme, dirs_exist_ok=True)