Extend manage script

[ci skip]

manage

@@ -7,12 +7,14 @@ usage() {
 Usage: $0 <command> [options]
 
 Commands:
-  help        Show this help message and exit
-  new <name>  Create a new song with the specified name
+  help         Show this help message and exit
+  new [name]   Create a new song [with the specified name]
+  edit <name>  Edit song with $EDITOR (taken from the EDITOR env var)
 
 Examples:
   $0 help
   $0 new [song-name]
+  $0 edit <song-name>
 
 EOF
   exit 1
@@ -43,6 +45,14 @@ case "$1" in
 		fi
 		create_new_song
 		;;
+	edit)
+		if [ "$#" -eq 2 ]; then
+			$EDITOR "content/$2/$2.cho"
+		else
+			echo -e "Missing song name\n"
+			usage
+		fi
+		;;
 	help)
 		usage
 		;;