Mathieu Fenniak 76bf87f472 fix: data race condition causing incorrect shell on a task step if it referenced a matrix variable (#865) ... The `setupShell` function would update the shell stored on the `Step` object, setting it to either a default value from the job, an expression evaluated in the context of the job, a default from the workflow, or finally falling back to bash or powershell defaults. Typically this would be fine -- although it would trigger the data race detector because the `Step` is a shared object between multiple concurrent matrix evaluations for the job. In the *really quite unlikely* case that the `shell` field on a step or job referenced a matrix variable, this data race would actually trigger the shared step's `Shell` value to end up as "whichever one was evaluated last", causing the wrong shell to be used. The new `matrix-shell` test triggers this behavior, and fails without the associated code fix. As a fix, the `Shell` field in `Step` is never mutated; instead only the value on non-shared `stepRun` instance is updated from `setupShellCommand`. `Shell` was renamed to `RawShell` as part of verifying all references were updated and it seemed to make sense to keep that name since it is a pre-evaluator value. ``` ================== WARNING: DATA RACE Write at 0x00c00013e9b0 by goroutine 1470: code.forgejo.org/forgejo/runner/v9/act/runner.(*stepRun).setupShell() /.../forgejo-runner/act/runner/step_run.go:210 +0x8f2 code.forgejo.org/forgejo/runner/v9/act/common/git.FindGitRevision() /.../forgejo-runner/act/common/git/git.go:58 +0xc4 code.forgejo.org/forgejo/runner/v9/act/model.(*GithubContext).SetSha() /.../forgejo-runner/act/model/github_context.go:161 +0x6b5 code.forgejo.org/forgejo/runner/v9/act/runner.(*RunContext).getGithubContext() /.../forgejo-runner/act/runner/run_context.go:1228 +0x26ca ... Previous write at 0x00c00013e9b0 by goroutine 1469: code.forgejo.org/forgejo/runner/v9/act/runner.(*stepRun).setupShell() /.../forgejo-runner/act/runner/step_run.go:210 +0x8f2 code.forgejo.org/forgejo/runner/v9/act/common/git.FindGitRevision() /.../forgejo-runner/act/common/git/git.go:58 +0xc4 code.forgejo.org/forgejo/runner/v9/act/model.(*GithubContext).SetSha() /.../forgejo-runner/act/model/github_context.go:161 +0x6b5 code.forgejo.org/forgejo/runner/v9/act/runner.(*RunContext).getGithubContext() /.../forgejo-runner/act/runner/run_context.go:1228 +0x26ca ... ================== ``` <!--start release-notes-assistant--> <!--URL:https://code.forgejo.org/forgejo/runner--> - bug fixes - [PR](https://code.forgejo.org/forgejo/runner/pulls/865): <!--number 865 --><!--line 0 --><!--description Zml4OiBkYXRhIHJhY2UgY29uZGl0aW9uIGNhdXNpbmcgaW5jb3JyZWN0IGBzaGVsbGAgb24gYSB0YXNrIHN0ZXAgaWYgaXQgcmVmZXJlbmNlZCBhIG1hdHJpeCB2YXJpYWJsZQ==-->fix: data race condition causing incorrect `shell` on a task step if it referenced a matrix variable<!--description--> <!--end release-notes-assistant--> Reviewed-on: https://code.forgejo.org/forgejo/runner/pulls/865 Reviewed-by: earl-warren <earl-warren@noreply.code.forgejo.org> Co-authored-by: Mathieu Fenniak <mathieu@fenniak.net> Co-committed-by: Mathieu Fenniak <mathieu@fenniak.net>		2025-08-15 21:10:53 +00:00
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push.yml	fix: data race condition causing incorrect shell on a task step if it referenced a matrix variable (#865)	2025-08-15 21:10:53 +00:00