chbg: make sure resizing output is reachable.

bin/chbg

@@ -3,11 +3,13 @@
 [ -z "$1" ] && { echo "Usage: $0 <image-file>"; exit 1; }
 
 WP_DIR="${XDG_DATA_HOME:-$HOME/.local/share}"
+TMP_DIR="${XDG_CACHE_HOME:-$HOME/.cache}"
 finput=$1
 
 read -r fw fh < <(magick identify -format "%w %h" -- "$1")
 (( fw > 3840 && fh > 2160 )) && {
-	finput="${XDG_CACHE_HOME:-$HOME/.cache}/${finput##*/}"
+	mkdir -p $TMP_DIR
+	finput="$TMP_DIR/${finput##*/}"
 	echo "WARNING: image too large, resizing ..."
 	magick $1 -resize "3840x2160^" $finput
 }
@@ -16,7 +18,7 @@ echo -n "making blurred version of $finput ... "
 mkdir -p $WP_DIR
 cp $finput $WP_DIR/.wallpaper
 magick $WP_DIR/.wallpaper -filter Gaussian -blur 0x30 $WP_DIR/.wallpaper_blur
-[[ $finput == "${XDG_CACHE_HOME:-$HOME/.cache}"* ]] && rm -f $finput
+[[ $finput == $TMP_DIR* ]] && rm -f $finput
 echo "Done."
 
 swww img $WP_DIR/.wallpaper