Bug 1580778 - Migrate build tasks to taskgraph and retire the old dec…

[JohanLorenzo]

…ision task

Pull Request checklist

• Quality: This PR builds and passes detekt/ktlint checks (A pre-push hook is recommended)
• Tests: This PR includes thorough tests or an explanation of why it does not
• Screenshots: This PR includes screenshots or GIFs of the changes made or an explanation of why it does not
• Accessibility: The code in this PR follows accessibility best practices or does not include any user facing features

After merge

• Milestone: Make sure issues finished by this pull request are added to the milestone of the version currently in development.

To download an APK when reviewing a PR:

1. click on Show All Checks,
2. click Details next to "Taskcluster (pull_request)" after it appears and then finishes with a green checkmark,
3. click on the "Fenix - assemble" task, then click "Run Artifacts".
4. the APK links should be on the left side of the screen, named for each CPU architecture

[codecov-io]

Codecov Report

Merging #5488 into master will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master    #5488   +/-   ##
=========================================
  Coverage     13.24%   13.24%           
  Complexity      289      289           
=========================================
  Files           253      253           
  Lines         10404    10404           
  Branches       1514     1514           
=========================================
  Hits           1378     1378           
  Misses         8932     8932           
  Partials         94       94

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[mitchhentges]

substitutions* :)
Thanks for documenting which properties have variables available :)

[JohanLorenzo]

Thanks! I intend to change the gradle call because it slowed down the decision task run. The reason is: taskgraph generates all tasks (before filtering them out), so we have about 8 call to gradle, which is slower than before. I think I'll replace it with a single call to gradle which outputs config.

Edit: typo fixed!

[JohanLorenzo]

Tested against:

• push: https://tools.taskcluster.net/groups/cnVtcABtRBiN5_Kg6K6FBA
• nightly: https://tools.taskcluster.net/groups/An-pIeaPT4aU0ZaW4TUlZg
• raptor: https://tools.taskcluster.net/groups/d4K4GfpCTuySjdiUdDvo8Q
• release: https://tools.taskcluster.net/groups/dK3nNSH-Q7CV_ymkW9ic2g
• beta: https://tools.taskcluster.net/groups/a6DaHegvRQ2OqbHe4BsuSQ

The push-apk failures are due to worker configuration. I made sure the push-apk payloads haven't changed.