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dd17730f4c
Mergebot / forwardport crons need to run in a specific ordering in order to flow into one another correctly. The default ordering being unspecified, it was not possible to use the normal cron runner (instead of the external driver running crons in sequence one at a time). This can be fixed by setting *sequences* on crons, as the cron runner (`_process_jobs`) will use that order to acquire and run crons. Also override `_process_jobs` however: the built-in cron runner fetches a static list of ready crons, then runs that. This is fine for normal situation where the cron runner runs in a loop anyway but it's any issue for the tests, as we expect that cron A can trigger cron B, and we want cron B to run *right now* even if it hadn't been triggered before cron A ran. We can replace `_process_job` with a cut down version which does that (cut down because we don't need most of the error handling / resilience, there's no concurrent workers, there's no module being installed, versions must match, ...). This allows e.g. the cron propagating commit statuses to trigger the staging cron, and both will run within the same `run_crons` session. Something I didn't touch is that `_process_jobs` internally creates completely new environments so there is no way to pass context into the cron jobs anymore (whereas it works for `method_direct_trigger`), this means the context values have to be shunted elsewhere for that purpose which is gross. But even though I'm replacing `_process_jobs`, this seems a bit too much of a change in cron execution semantics. So left it out. While at it tho, silence the spammy `py.warnings` stuff I can't do much about. |
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