1884260 - Ensure that prerequisites are completed at the entry points to update checking

Status: RESOLVED DUPLICATE of bug 1875502

(Toolkit :: Application Update, task, P3)

Description

[Robin Steuber (she/her) [:bytesized]]

It is currently possible in unusual circumstances to enter the update system without having done things like _postUpdateProcessing, which is normally done at startup (See Bug 1875502). Really the update process should be as close as possible to 100% bulletproof since we need updates to work to fix literally anything.

I want to address this by doing a couple of things.

1. I want to make a function that serves as a gatekeeper for the entry points to update checking that will make sure that things like _postUpdateProcessing have been called.
2. I want to make _postUpdateProcessing more resilient to failure by wrapping some existing code in try blocks, falling back from errors when at all possible, and showing a manual update notification on unrecoverable errors.