added tagdump preview

mus.sh

@@ -5,7 +5,9 @@
 
 [ -z "$PLAYER" ] && PLAYER='mpg123'
 [ -z "$FTYPES" ] && FTYPES='mp3 MP3'
-
+if [ -z "$TAGDUMP" ]; then
+  TAGDUMP='mpg123-id3dump -n {} | grep -E "^(Title|Artist|Album|Year|Comment|Genre):" | sort -u'
+fi
 mdir="$1"
 [ -z "$mdir" ] && mdir='.' 
 set --
@@ -16,16 +18,13 @@ for ext in $FTYPES; do
     set -- "$@" -o -name "*.$ext"
   fi
 done
-
 cd "$mdir"
-echo "Indexing music..."
 muslist="$(find . -type f \( "$@" \))"
 dirlist="$(find . -type f \( "$@" \) -print0 | xargs -0 dirname | sort -u)"
 muslist="$(printf '%s\n%s' "$muslist" "$dirlist" | sort -u)"
-echo "Indexing complete"
-
+PREVIEWCMD="[ -d {} ] && ls -1 {} || ([ {} != 'Quit' ] && $TAGDUMP)"
 while true; do
-  src="$(printf '%s\nQuit' "$muslist" | fzf --tac -0 -1)"
+  src="$(printf '%s\nQuit' "$muslist" | fzf --tac --preview="$PREVIEWCMD" -0 -1)"
   [ -d "$src" ] && src="$(find "$src" -type f \( "$@" \) | sort -u)"
   [ "$src" = 'Quit' ] && break 
   if [ -n "$src" ]; then