Merge lp:~lool/music-app/singleton into lp:music-app/trusty

[Loïc Minier]

Add X-Ubuntu-Single-Instance=true and reorder X- fields alphabetically; X-Ubuntu-Single-Instance=true allows with recent upstart-app-launch versions to prevent multiple instances of the same app to be launched (Click or non-Click apps). This is useful to reuse a running a music-app instance to load a new music:// URL.

Hi there,

The design goal for Touch apps is to have all Click and non-Click apps single instance. This branch adds a flag to achieve this in music-app.

Another goal I'm trying to get closer to is being able to play music:// URLs from the dash one after the other. Currently, the music-app stops when put in the background, but it will soon keep playing (next platform-api package update will whitelist music-app). Then it's critical for us to ensure that we don't start multiple music-app instances.

The longer term plan to load a new URL in a running app involves implementing a new DBus interface in apps which would automatically be provided by the SDK, but it's still some time away. In the mean time, we made upstart-app-launch kill the running app and start it again with the new URL.

The patch I'm proposing here tells upstart-app-launch to keep a single music-app instance around, we've merged it for other builtin apps.

NB: a fix for an upstart-app-launch bug, LP# 1229468, is also pending upload

[Nicholas Skaggs (nskaggs)]

review: Approve

[Ubuntu Phone Apps Jenkins Bot (ubuntu-phone-apps-jenkins-bot)]

review: Approve (continuous-integration)

=== modified file 'music-app.desktop'
--- music-app.desktop	2013-09-23 22:16:39 +0000
+++ music-app.desktop	2013-09-25 19:25:00 +0000
@@ -8,6 +8,7 @@
 Terminal=false
 Type=Application
 StartupNotify=true
+X-Ubuntu-Single-Instance=true
+X-Ubuntu-StageHint=music-app
 X-Ubuntu-Touch=true
-X-Ubuntu-StageHint=music-app
 Name[sv_SE]=Musik