tree b5ce399357132bfc63a78fd0391310ff41f1a786
parent 69fb4f6e6dffb4699b4304400e99d81f3256b1f3
author Oliver Newman <olivernewman@google.com> 1581381555 +0000
committer CQ bot account: commit-bot@chromium.org <commit-bot@chromium.org> 1581381555 +0000

[auto_roller] Refactor to support status checks

We want to start automatically closing the tree if and when the fuchsia
roller fails. To accomplish this, the fuchsia_roller.py recipe needs to
be able to inspect the state of the CL created by auto_roller/api.py
*before* an exception is raised. So I refactored the auto_roller
module's `attempt_roll` method to return a `GerritChange` object instead
of a boolean, and added a `raise_on_failure` param to control whether
the method will raise an exception for a failed roll.

The only expectation file diffs are a result of presenting the CL link
in Milo in the case of a successful dry run.

Bug: 45522
Change-Id: I90ca721f7dd4bcccc7afbde71a5cab6d24e126c0