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|
#!/bin/sh
bgpid="${XDG_RUNTIME_DIR:-${TMPDIR:-/tmp}}/swaybg.pid"
bgroot="${XDG_DATA_HOME:-$HOME/.local/share}"
bgimg="${bgroot}/wallpaper"
die()
{
printf "\033[31;1merr: %b\033[0m\n" "${1:-no args for die()}" 1>&2
exit "${2:-1}"
}
usage()
{
cat <<- EOF
Usage: ${0##*/} [wallpaper.img|directory]
A helper script for swaybg
EOF
}
dep_check()
{
# usage: cmd_check cmd_1 ...
: "${1:?}"
for dep; do
command -v "$dep" 1>/dev/null ||
die "${dep}: command not found" 127
done
unset dep
}
randimg()
{
# usage: randbg dir
: "${1:?}"
maxattempts=10
attempt=0
img=
while :; do
img="$(find "$1" \
-iname "*.avif" \
-o -iname "*.heic" \
-o -iname "*.heif" \
-o -iname "*.jpeg" \
-o -iname "*.jpg" \
-o -iname "*.jxl" \
-o -iname "*.png" \
-o -iname "*.webp" | shuf -n1)"
[ -z "$img" ] &&
break;
# make sure the file is an actual image
case "$(file --brief --dereference --mime-type "$img")" in
"image/"*)
echo "$img"
break;
;;
*)
attempt=$((attempt + 1))
[ "$attempt" -gt "$maxattempts" ] &&
break;
esac
done
}
updatewall()
{
: "${1:?}"
rm -f "$bgimg"
cp "$1" "$bgimg"
[ -s "$bgpid" ] &&
kill -9 "$(cat "$bgpid")"
swaybg --mode fill --image "$bgimg" > /dev/null 2>&1 &
echo $! > "$bgpid"
}
main()
{
[ ! -r "$1" ] &&
usage && exit 1;
[ ! -d "$bgroot" ] &&
mkdir -p "$bgroot"
dep_check swaybg file
case "$(file --brief --dereference --mime-type "$1")" in
"image/"*)
updatewall "$1"
;;
"inode/directory")
img=$(randimg "$1")
[ -z "$img" ] &&
die "no image file in directory"
updatewall "$img"
;;
*)
die "invalid image file"
;;
esac
}
main "$@"
|
