Convert change_wallpaper.sh using nix writeShellApplication

hosts/totsugeki/desktop/scripts_legacy/bin/change_wallpaper.sh

@@ -1,74 +0,0 @@
-#!/bin/sh
-
-shopt -s nullglob
-
-WALLPAPER_PATH=~/.local/share/wallpapers
-WALLPAPERS=($WALLPAPER_PATH/*)
-
-if [ ! -f "$WALLPAPER_PATH/.current_path" ]; then
-    # Current wallpaper file does not exist, create it
-    echo ${WALLPAPERS[0]} > "$WALLPAPER_PATH/.current_path"
-fi
-
-CURRENT_WALLPAPER=$(cat "$WALLPAPER_PATH/.current_path")
-# Get the current wallpaper's index
-for index in ${!WALLPAPERS[@]}; do
-    if [ "${WALLPAPERS[$index]}" = "$CURRENT_WALLPAPER" ]; then
-        CURRENT_WP_INDEX=$index
-    fi
-done
-
-if [ -z $CURRENT_WP_INDEX ]; then
-    CURRENT_WP_INDEX=0
-fi
-
-if [ $1 = "previous" ]; then
-    WALLPAPER=${WALLPAPERS[$CURRENT_WP_INDEX - 1]}
-    TRANSITION_ANGLE=300
-elif [ $1 = "next" ]; then
-    NEXT_INDEX=$((CURRENT_WP_INDEX + 1))
-    if [ $NEXT_INDEX = ${#WALLPAPERS[@]} ]; then
-        NEXT_INDEX=0
-    fi
-    WALLPAPER=${WALLPAPERS[$NEXT_INDEX]}
-    TRANSITION_ANGLE=120
-elif [ $1 = "open-menu" ]; then
-    INPUT=$''
-    for index in ${!WALLPAPERS[@]}; do
-        if [ $index = $CURRENT_WP_INDEX ]; then
-            continue
-        fi
-        _WALLPAPER="${WALLPAPERS[$index]}"
-        _WALLPAPER_NAME=$(basename "$_WALLPAPER")
-        INPUT+="$_WALLPAPER_NAME\0icon\x1f$_WALLPAPER"
-        if [ ! $(($index + 1)) = ${#WALLPAPERS[@]} ]; then
-            INPUT+=$'\n'
-        fi
-    done
-    WALLPAPER=$(echo -en "$INPUT" | rofi -dmenu -mesg "Cambiar fondo de pantalla" -p "" -i -theme ~/.config/rofi/wallpaper_selector.rasi)
-    if [ ! $? = 0 ]; then
-        exit 1
-    fi
-    WALLPAPER="${WALLPAPER_PATH}/${WALLPAPER}"
-    TRANSITION_ANGLE=270
-else
-    echo "Unknown first argument: $1"
-    exit 1
-fi
-
-if [ -z $WALLPAPER ]; then
-    exit 1
-fi
-
-WALLPAPER_NAME=$(basename "$WALLPAPER")
-echo "Setting wallpaper to $WALLPAPER, args: $@"
-echo "$WALLPAPER" > "$WALLPAPER_PATH/.current_path"
-ln -sf "$WALLPAPER" "$WALLPAPER_PATH/.current_image"
-dunstify -i "$WALLPAPER" -t 2800 "Cambiando fondo de pantalla" "Cambiando a $WALLPAPER_NAME"
-swww img\
-    --transition-type wipe\
-    --transition-angle $TRANSITION_ANGLE\
-    --transition-step 90\
-    --transition-duration 1\
-    --transition-fps 165\
-    "$WALLPAPER"