anduin / switch_wallpaper.sh

#!/bin/bash set -e # Help function usage() { echo "Usage: sudo $0 <path-to-image>" echo "Changes the GDM background to the specified image." echo "Note: This script must be run as root." exit 1 } # Check for root if [ "$EUID" -ne 0 ]; then echo "Error: This script must be run as root." exit 1 fi # Check arguments TARGET_IMAGE="$1" if [ -z "$TARGET_IMAGE" ]; then usage fi if [ ! -f "$TARGET_IMAGE" ]; then echo "Error: Image file '$TARGET_IMAGE' not found." exit 1 fi # Check dependencies if ! command -v glib-compile-resources &> /dev/null; then echo "Error: 'glib-compile-resources' is not installed." echo "Please install 'libglib2.0-dev-bin' (Ubuntu/Debian) or 'glib2-devel' (Fedora)." exit 1 fi # Define Paths REPO_DIR="$(dirname "$(readlink -m "${0}")")" THEME_ASSETS_DIR="${REPO_DIR}/other/gdm/theme" XML_FILE="${REPO_DIR}/other/gdm/gnome-shell-theme.gresource.xml" WORK_DIR="/tmp/gdm-switch-wallpaper-work" # Targeted GDM theme files (Priority order based on lib-core.sh) POP_OS_GR_FILE="/usr/share/gnome-shell/theme/Pop/gnome-shell-theme.gresource" YARU_GR_FILE="/usr/share/gnome-shell/theme/Yaru/gnome-shell-theme.gresource" ZORIN_GR_DARK_FILE="/usr/share/gnome-shell/theme/ZorinBlue-Dark/gnome-shell-theme.gresource" ZORIN_GR_LIGHT_FILE="/usr/share/gnome-shell/theme/ZorinBlue-Light/gnome-shell-theme.gresource" MISC_GR_FILE="/usr/share/gnome-shell/gnome-shell-theme.gresource" # Find which theme file is in use TARGET_FILE="" if [ -f "$POP_OS_GR_FILE" ]; then TARGET_FILE="$POP_OS_GR_FILE" elif [ -f "$YARU_GR_FILE" ]; then TARGET_FILE="$YARU_GR_FILE" elif [ -f "$ZORIN_GR_DARK_FILE" ]; then TARGET_FILE="$ZORIN_GR_DARK_FILE" elif [ -f "$ZORIN_GR_LIGHT_FILE" ]; then TARGET_FILE="$ZORIN_GR_LIGHT_FILE" elif [ -f "$MISC_GR_FILE" ]; then TARGET_FILE="$MISC_GR_FILE" else echo "Error: Could not find any supported GDM theme .gresource file." exit 1 fi echo "Target GDM theme file: $TARGET_FILE" # Prepare Workspace echo "Preparing temporary workspace at $WORK_DIR..." rm -rf "$WORK_DIR" mkdir -p "$WORK_DIR" # Copy base theme assets if [ ! -d "$THEME_ASSETS_DIR" ]; then echo "Error: Theme assets not found at $THEME_ASSETS_DIR" exit 1 fi cp -r "$THEME_ASSETS_DIR"/* "$WORK_DIR/" # Copy and rename the new background image echo "Processing background image..." cp "$TARGET_IMAGE" "$WORK_DIR/background.png" # Backup existing theme file if [ ! -f "${TARGET_FILE}.bak" ]; then echo "Backing up original theme to ${TARGET_FILE}.bak..." cp "$TARGET_FILE" "${TARGET_FILE}.bak" else echo "Backup already exists at ${TARGET_FILE}.bak, skipping backup." fi # Compile Resources echo "Compiling GDM resources..." glib-compile-resources \ --sourcedir="$WORK_DIR" \ --target="$TARGET_FILE" \ "$XML_FILE" # Cleanup rm -rf "$WORK_DIR" echo "Success! GDM background has been updated." echo "You may need to restart GDM or reboot to see the changes." echo " - To restart GDM: sudo systemctl restart gdm"