1906169 - Profile backup web worker needs error handling plumbing

Status: RESOLVED FIXED

(Firefox :: Profile Backup, task, P3)

Description

[Stephen Thompson [:sthompson]]

The Firefox profile backup code is throwing errors with a "cause" for use by the UI and other components to understand the context of the errors. https://bugzilla.mozilla.org/show_bug.cgi?id=1904949

The profile backup code includes service workers, but the additional plumbing required to surface errors' "cause" within the workers out to the main process is not complete. The service workers (particularly Archive.worker.mjs) need this plumbing in order to accurately tell the UI about specific issues that may have been detected within the service workers' operations.

Comment 1

[Stephen Thompson [:sthompson]]

Attachment: Bug 1906169 - Error plumbing for profile backup web worker r=#backup-reviewers

Some of the Firefox profile backup code is executed within a web worker, so errors thrown in the worker do not automatically maintain their full context when caught in the main process.

This change creates a BackupError for throwing errors with causes specific to Firefox profile backup. The new error type is configured to work with the PromiseWorker machinery in the Firefox codebase in order to serialize and deserialize error details across the worker boundary.

Comment 2

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/9db70c9ed11a
Error plumbing for profile backup web worker r=backup-reviewers,mconley

Comment 3

[tszentpeteri]

https://hg.mozilla.org/mozilla-central/rev/9db70c9ed11a