Call systemd `StartTransientUnit` when starting app

ids1024 commented 2 months ago

This is needed for things like xdg-desktop-portal to get the app ID from a pid, in unsandboxed apps.

A couple things still should be fixed here, then cosmic-launcher, cosmic-app-list, and cosmic-app-library will need to be updated to use this.

ids1024 commented 2 months ago

I guess the use of tokio in https://github.com/pop-os/libcosmic/pull/548/commits/fd0e54747976c383f02212a753a2b0bde06af6c5, although a clean solution, is problematic if the tokio feature of libcosmic isn't enabled...

ids1024 commented 2 months ago

With the changes here:

cosmic::process::spawn and cosmic::desktop::spawn_desktop_exec are now async functions.
The process and desktop features now depend on either smol or tokio features being enabled. But if we depend on zbus, it will fail to compile anyway without one of those. Presumably cosmic apps should always enable one.
If the tokio feature is enabled, the futures will need to be called in the tokio executor, which should be like other things.

These things seem reasonable.

pop-os / libcosmic