swaylock-cool: Clean up image files

tree/.local/bin/swaylock-cool

@@ -15,11 +15,11 @@ for CMD in $OPTIONAL_CMDS; do
 	fi
 done
 
-BASE_IMAGE_PATH="$(mktemp)"
+BASE_IMAGE_DIR="$(mktemp -d)"
 INDEX=1
 
 image_path() {
-	echo "$BASE_IMAGE_PATH$1.jpg"
+	echo "$BASE_IMAGE_DIR/$1.jpg"
 }
 
 UPSCALE="$(python3 -c "print(100*$BLUR_FACTOR, end='')")%"
@@ -31,3 +31,5 @@ convert -scale $DOWNSCALE -scale $UPSCALE "$(image_path 1)" "$(image_path 2)"
 convert -composite -gravity center "$(image_path 2)" ~/.config/sway/ferris-stamp.png "$(image_path 3)"
 
 swaylock --config ~/.config/sway/swaylock.config --image "$(image_path 3)"
+
+rm -r "$BASE_IMAGE_DIR"