osx: modify itunes function to support Apple Music (#8372)

Change `itunes` to `music`, as iTunes was renamed to Music in _**macOS** Catalina 10.15_
Co-authored-by: Marc Cornellà <marc.cornella@live.com>

plugins/osx/README.md

@@ -43,7 +43,7 @@ WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 ## Commands
 
 | Command         | Description                                           |
-| :-------------- | :-------------------------------------------------- |
+| :-------------- | :---------------------------------------------------- |
 | `tab`           | Open the current directory in a new tab               |
 | `split_tab`     | Split the current terminal tab horizontally           |
 | `vsplit_tab`    | Split the current terminal tab vertically             |
@@ -56,6 +56,7 @@ WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 | `man-preview`   | Open a specified man page in Preview app              |
 | `showfiles`     | Show hidden files                                     |
 | `hidefiles`     | Hide the hidden files                                 |
-| `itunes`        | Control iTunes. Use `itunes -h` for usage details   |
+| `itunes`        | DEPRECATED. Use `music` from macOS Catalina on        |
+| `music`         | Control Apple Music. Use `music -h` for usage details |
 | `spotify`       | Control Spotify and search by artist, album, track…   |
 | `rmdsstore`     | Remove .DS\_Store files recursively in a directory    |

plugins/osx/osx.plugin.zsh

@@ -219,7 +219,19 @@ function vncviewer() {
 }
 
 # iTunes control function
-function itunes() {
+function itunes music() {
+	local APP_NAME=Music
+
+	autoload is-at-least
+	if is-at-least 10.15 $(sw_vers -productVersion); then
+		if [[ $0 = itunes ]]; then
+			echo >&2 The itunes function name is deprecated. Use \`music\' instead.
+			return 1
+		fi
+	else
+		APP_NAME=iTunes
+	fi
+
 	local opt=$1
 	local playlist=$2
 	shift
@@ -236,7 +248,7 @@ function itunes() {
 			opt="$opt track"
 			;;
 		vol)
-			local new_volume volume=$(osascript -e 'tell application "iTunes" to get sound volume')
+			local new_volume volume=$(osascript -e "tell application \"$APP_NAME\" to get sound volume")
 			if [[ $# -eq 0 ]]; then
 				echo "Current volume is ${volume}."
 				return 0
@@ -252,8 +264,8 @@ function itunes() {
 			;;
 		playlist)
 			# Inspired by: https://gist.github.com/nakajijapan/ac8b45371064ae98ea7f
-if [[ ! -z "$playlist" ]]; then
-                    		osascript -e 'tell application "iTunes"' -e "set new_playlist to \"$playlist\" as string" -e "play playlist new_playlist" -e "end tell" 2>/dev/null;
+			if [[ ! -z "$playlist" ]]; then
+				osascript -e "tell application \"$APP_NAME\"" -e "set new_playlist to \"$playlist\" as string" -e "play playlist new_playlist" -e "end tell" 2>/dev/null;
 				if [[ $? -eq 0 ]]; then
 					opt="play"
 				else
@@ -264,13 +276,13 @@ if [[ ! -z "$playlist" ]]; then
 			fi
 			;;
 		playing|status)
-			local state=`osascript -e 'tell application "iTunes" to player state as string'`
+			local state=`osascript -e "tell application \"$APP_NAME\" to player state as string"`
 			if [[ "$state" = "playing" ]]; then
-				currenttrack=`osascript -e 'tell application "iTunes" to name of current track as string'`
-				currentartist=`osascript -e 'tell application "iTunes" to artist of current track as string'`
+				currenttrack=`osascript -e "tell application \"$APP_NAME\" to name of current track as string"`
+				currentartist=`osascript -e "tell application \"$APP_NAME\" to artist of current track as string"`
 				echo -E "Listening to $fg[yellow]$currenttrack$reset_color by $fg[yellow]$currentartist$reset_color";
 			else
-				echo "iTunes is" $state;
+				echo "$APP_NAME is" $state;
 			fi
 			return 0
 			;;
@@ -284,7 +296,7 @@ if [[ ! -z "$playlist" ]]; then
 
 			if [[ -n "$state" && ! "$state" =~ "^(on|off|toggle)$" ]]
 			then
-				print "Usage: itunes shuffle [on|off|toggle]. Invalid option."
+				print "Usage: $0 shuffle [on|off|toggle]. Invalid option."
 				return 1
 			fi
 
@@ -305,14 +317,14 @@ EOF
 			esac
 			;;
 		""|-h|--help)
-			echo "Usage: itunes <option>"
+			echo "Usage: $0 <option>"
 			echo "option:"
 			echo "\tlaunch|play|pause|stop|rewind|resume|quit"
 			echo "\tmute|unmute\tcontrol volume set"
 			echo "\tnext|previous\tplay next or previous track"
 			echo "\tshuf|shuffle [on|off|toggle]\tSet shuffled playback. Default: toggle. Note: toggle doesn't support the MiniPlayer."
 			echo "\tvol [0-100|up|down]\tGet or set the volume. 0 to 100 sets the volume. 'up' / 'down' increases / decreases by 10 points. No argument displays current volume."
-			echo "\tplaying|status\tShow what song is currently playing in iTunes."
+			echo "\tplaying|status\tShow what song is currently playing in Music."
 			echo "\tplaylist [playlist name]\t Play specific playlist"
 			echo "\thelp\tshow this message and exit"
 			return 0
@@ -322,7 +334,7 @@ EOF
 			return 1
 			;;
 	esac
-	osascript -e "tell application \"iTunes\" to $opt"
+	osascript -e "tell application \"$APP_NAME\" to $opt"
 }
 
 # Spotify control function