109 lines
3.0 KiB
Bash
Executable File
109 lines
3.0 KiB
Bash
Executable File
#!/usr/bin/env bash
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# /home/krosh/Documents/Github/nixos-config/home-manager/modules/zsh/next_wallpaper.sh
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# Pick next or random wallpaper from ~/Pictures/Wallpapers and update symlink ~/Pictures/wallpaper.png
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# Then call: hyprctl hyprpaper reload ,"$WALLPAPER"
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set -euo pipefail
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RANDOM_MODE=0
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while getopts "r" opt; do
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case "$opt" in
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r) RANDOM_MODE=1 ;;
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*) echo "Usage: $0 [-r]" >&2; exit 2 ;;
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esac
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done
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WALLPAPERS_DIR="$HOME/Pictures/Wallpapers"
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SYMLINK="$HOME/Pictures/wallpaper.png"
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if [ ! -d "$WALLPAPERS_DIR" ]; then
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echo "Wallpapers directory not found: $WALLPAPERS_DIR" >&2
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exit 1
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fi
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# Resolve current wallpaper (target of symlink). If not a symlink or missing, CUR will be empty.
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CUR="$(readlink -f "$SYMLINK" 2>/dev/null || true)"
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# Collect png files; sort by timestamp ascending (oldest first) using ls -tr.
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# If there are spaces in names, ls handles them, but filenames with newlines are unsupported.
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mapfile -t FILES < <(find "$WALLPAPERS_DIR" -maxdepth 1 -type f -iname '*.png' -print0 | xargs -0 ls -1tr 2>/dev/null || true)
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if [ "${#FILES[@]}" -eq 0 ]; then
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echo "No png wallpapers found in $WALLPAPERS_DIR" >&2
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exit 1
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fi
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choose_random() {
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# pick random file different from CUR if possible
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candidates=()
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for f in "${FILES[@]}"; do
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[ "$(readlink -f "$f")" = "$CUR" ] && continue
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candidates+=("$f")
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done
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if [ "${#candidates[@]}" -eq 0 ]; then
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# only current exists
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echo "No other wallpaper to choose (only current exists)." >&2
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exit 1
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fi
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idx=$((RANDOM % ${#candidates[@]}))
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echo "${candidates[$idx]}"
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}
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choose_next() {
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# find current in sorted list and pick next (wrap). If current not found, choose first.
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n=${#FILES[@]}
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if [ "$n" -eq 1 ]; then
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# only one file
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if [ "$(readlink -f "${FILES[0]}")" = "$CUR" ]; then
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echo "No other wallpaper to choose (only current exists)." >&2
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exit 1
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else
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echo "${FILES[0]}"
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return
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fi
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fi
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# find index of current
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idx=-1
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for i in "${!FILES[@]}"; do
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if [ "$(readlink -f "${FILES[i]}")" = "$CUR" ]; then
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idx="$i"
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break
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fi
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done
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if [ "$idx" -eq -1 ]; then
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# current not in list: choose first
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echo "${FILES[0]}"
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return
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fi
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# next index with wrap
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next=$(( (idx + 1) % n ))
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# if next equals current (possible if only one), error handled above
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echo "${FILES[$next]}"
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}
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if [ "$RANDOM_MODE" -eq 1 ]; then
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NEW="$(choose_random)"
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else
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NEW="$(choose_next)"
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fi
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# Ensure absolute path
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NEW="$(readlink -f "$NEW")"
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# Create symlink (atomic-ish): create temporary symlink and move
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TMP_SYMLINK="$(mktemp -u "${SYMLINK}.tmp.XXXX")"
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ln -sfn -- "$NEW" "$TMP_SYMLINK"
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mv -f "$TMP_SYMLINK" "$SYMLINK"
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# Export for hyprctl command (and run it)
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WALLPAPER="$NEW"
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# run exactly as requested
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hyprctl hyprpaper reload ,"$WALLPAPER"
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hyprpanel -q ; hyprpanel & disown
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wal -c
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wal -n -i "$WALLPAPER"
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exit 0 |