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#!/usr/bin/env sh
# Switch the COSMIC desktop between light and dark mode, and optionally the
# wallpaper with it: set SYSTEM_THEME_WALLPAPER_DARK and
# SYSTEM_THEME_WALLPAPER_LIGHT to image files. Emacs's auto-dark follows the
# desktop's mode on its own. On another desktop, this is the file to rewrite.
COSMIC="${XDG_CONFIG_HOME:-$HOME/.config}/cosmic"
set_wallpaper() {
[ -n "$1" ] || return 0
wallpaper="$(realpath "$1")" || return 1
sed -i 's|^.*source: Path(".*"),$| source: Path("'"$wallpaper"'"),|' \
"$COSMIC/com.system76.CosmicBackground/v1/all"
}
case "$1" in
dark)
echo "true" > "$COSMIC/com.system76.CosmicTheme.Mode/v1/is_dark"
set_wallpaper "${SYSTEM_THEME_WALLPAPER_DARK:-}"
;;
light)
echo "false" > "$COSMIC/com.system76.CosmicTheme.Mode/v1/is_dark"
set_wallpaper "${SYSTEM_THEME_WALLPAPER_LIGHT:-}"
;;
*)
echo "usage: system-theme dark|light" >&2
exit 1
;;
esac
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