utils upgrade

utils/.local/bin/ytmusic

@@ -1,4 +1,5 @@
 #!/usr/bin/env bash
+set -eo pipefail
 
 # Download music from Youtube or Youtube Music
 # and save as top quality flac file without video
@@ -6,6 +7,25 @@
 # Usage:     $ ytmusic https://www.youtube.com/watch?v=dQw4w9WgXcQ
 # More info: https://github.com/ytdl-org/youtube-dl
 
+if [[ "$1" == "-h" || "$1" == "--help" ]]; then
+    cat <<EOF
+Usage: $(basename "$0") [-h] <url>
+
+Download music from YouTube or YouTube Music as FLAC.
+
+Options:
+    -h, --help    Show this help message
+
+Arguments:
+    url           YouTube or YouTube Music URL (playlist or video)
+
+Output:
+    $HOME/ytmusic/<playlist>/<channel> - <title>.flac
+
+EOF
+    exit 0
+fi
+
 DEST_PATH="${HOME}/ytmusic"
 mkdir -p "${DEST_PATH}"