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|
#!/bin/sh
main()
{
# Load custom configuration if available
if [ -f "$HOME/.local/etc/x/chwp" ]
then
. "$HOME/.local/etc/x/chwp"
fi
directory=${CHWP_BASEDIR:-$HOME/pictures/wallpapers}
size=${CHWP_SIZE:-1920x1080}
timeout=${1:-0}
walldir="$directory/$size"
log "main" "Checking $walldir for wallpapers"
# Fail early if there's no wallpaper directory
if [ ! -d "$walldir" ]
then
printf "No such directory: %s\n" "$walldir" >&2
exit 1
fi
CACHEFILE="$(mktemp)"
log "main" "Using $CACHEFILE as CACHEFILE"
find "${walldir}" -type f > "$CACHEFILE"
log main "Found $(wc -l "$CACHEFILE" | awk '{ print $1 }') wallpapers"
# If no timeout was set, just change it once
if [ "$timeout" -eq 0 ]
then
log main "No timeout set, only updating once"
set_papes
exit
fi
# Otherwise, change it every so often
while :
do
set_papes
sleep "${timeout}"
done
}
set_papes()
{
log "set_papes" "Gathering wallpapers"
pape="$(make_pape)"
log set_papes "Setting wallpaper to $pape"
feh --bg-fill "$pape"
log set_papes "Cleaning up temporary wallpaper image"
rm -f -- "$pape"
}
make_pape()
{
log "make_pape" "Creating wallpaper"
output="$(mktemp)"
imagelist="$(mktemp)"
monitorlist="$(mktemp)"
if [ -z "$CHWP_MONITORS" ]
then
log "make_pape" "Trying to determine screens"
xrandr -q \
| grep -F ' connected ' \
| grep -Eo '[[:digit:]]+x[[:digit:]]+' \
> "$monitorlist"
else
log "make_pape" "Using \$CHWP_MONITORS for monitorlist"
printf "%s" "$CHWP_MONITORS" \
| tr " " "\n" \
| grep -v "^$" \
> "$monitorlist"
fi
log "make_pape" "Found $(wc -l "$monitorlist" | awk '{ print $1 }') screen(s)"
while read -r resolution
do
log "make_pape" "Adding wallpaper for $resolution sized screen"
current_pape=$(get_pape "$resolution")
if [ "$current_pape" = "" ]
then
log "make_pape" "No wallpapers for $resolution"
current_pape="$(mktemp --tmpdir XXXXX.png)"
convert -size "$resolution" canvas:gray "$current_pape"
else
log "make_pape" "Using $current_pape"
fi
printf '"%s"\n' "$current_pape" >> "$imagelist"
unset resolution
unset current_pape
done < "$monitorlist"
# shellcheck disable=SC2046
# shellcheck disable=SC2086
eval convert +append $(cat $imagelist) "$output"
printf "%s" "$output"
rm -f -- "$imagelist"
}
get_pape()
{
if [ ! -d "$directory/$1" ]
then
log "get_pape" "$directory/$1 does not exist"
return 1
fi
printf "%s\n" "$(find "$directory/$1" -type f | shuf | head -n 1)"
}
log()
{
printf "[%s] %s: %s\n" "$(date +%FT%T)" "$1" "$2" >&2
}
main "$@"
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