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feat: Add max-parallel Support for Gitea Actions (#36357)

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Add support for `strategy.max-parallel` on Gitea Actions matrix jobs.

**How it works**
Jobs over the limit are inserted as `Blocked` instead of `Waiting`, so
runners never see them. When a job finishes, the job-status resolver
promotes one `Blocked` job per freed slot, in job order. Slots are
counted per `JobID` and scoped by reusable-workflow caller. A
`Cancelling` job still owns its runner, so it keeps its slot.

The cap is applied wherever a job can become `Waiting`: initial insert,
rerun, approval, and resolver promotion.

Best effort, not a hard invariant: two concurrent emitter passes can
each promote into the last slot, overshooting by one. It does not
compound, since every later pass recounts.

**Parsing**
Any YAML number, cast to an int as GitHub does (`1.5` → 1). `0` or
negative means unlimited. Expressions (`${{ ... }}`) are not evaluated
yet and fall back to unlimited.

**Migration**
Adds the `max_parallel` column on `action_run_job`. No index or
constraint changes.

**Compatibility**
Existing rows default to `0`, so behaviour is unchanged. No runner
changes needed: the runner protocol is untouched, and since the server
splits the matrix each runner still receives a single job.

Closes https://github.com/go-gitea/gitea/issues/35561
Signed-off-by: Pascal Zimmermann <pascal.zimmermann@theiotstudio.com>
Signed-off-by: ZPascal <pascal.zimmermann@theiotstudio.com>
Signed-off-by: wxiaoguang <wxiaoguang@gmail.com>
Co-authored-by: silverwind <me@silverwind.io>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
Co-authored-by: Zettat123 <zettat123@gmail.com>
This commit is contained in:
Pascal Zimmermann
2026-07-27 18:18:43 +02:00
committed by GitHub
parent e67dd4c818
commit 10c678a0a0
14 changed files with 637 additions and 17 deletions
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models/actions/run_job.go
+2
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@@ -69,6 +69,8 @@ type ActionRunJob struct {
// Org/repo clamps are enforced when the token is used at runtime.
// It is JSON-encoded repo_model.ActionsTokenPermissions and may be empty if not specified.
TokenPermissions *repo_model.ActionsTokenPermissions `xorm:"JSON TEXT"`
// MaxParallel is strategy.max-parallel, shared by all matrix jobs with the same JobID (0 = unlimited).
MaxParallel int `xorm:"NOT NULL DEFAULT 0"`
// RunAttemptID identifies the ActionRunAttempt this job belongs to.
// A value of 0 indicates a legacy job created before ActionRunAttempt existed.