Add progress reporting across jobs in subprocesses #1092

Open Cynical-Optimist opened 4 years ago

Background

As discussed in https://mail.gnome.org/archives/buildstream-list/2019-July/msg00020.html (an E-mail in response to #1029), it would be beneficial to be able to report the progress through a task, so that users know whether a task is hanging or making progress.

To facilitate this, !1482 adds in numerical progress reporting for the main process.

[ ] Pass the Task object created by the scheduler into the Element that is running
[ ] Fix any IPC that is preventing notifications in the plugin reaching the frontend
[ ] Add methods in Element to use the Task to report progress
[ ] Implement progress reporting for whichever plugins seem appropriate

It is possible to use function calls in the element plugins' implementations to report progress information that appears in the status display.

In GitLab by [Gitlab user @LaurenceUrhegyi] on Jul 30, 2019, 16:03

mentioned in merge request !1358

In GitLab by [Gitlab user @tlater] on Sep 10, 2019, 11:31

In GitLab by [Gitlab user @tlater] on Dec 2, 2019, 11:05

In GitLab by [Gitlab user @tpollard] on Dec 10, 2019, 13:17

If this is worked on, it should be ensured that the jobs are still picklable