plumbing: support commits extra headers, support jujutsu signed commit [5.x] #1633
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This adds support for extra headers. While git has a set of ["standard headers"] (`tree`, `parent`, `author`, `committer`, and `encoding`), it will also support [extra headers] when serializing. The extra headers must come after the standard ones, but they are otherwise freetyped. [Jujutsu] takes advantage of that to store its own identifier (`change-id`) as an extra header. Because signatures will cover the hash of the whole commit (standard headers, extra headers and the message. Everything but the signature itself), if we deserialize a commit and then `EncodeWithoutSignature` to get back the "canonical" representation of a commit, if we don't serialize back the extra headers, the hash will no longer match and the signature will fail to verify. This adds support for parsing and reencoding the extra headers from the original commit and it's expected to fix support for Jujutsu signed commits. Fixes go-git#1626 ["standard headers"]: https://github.com/git/git/blob/724518f3884d8707c5f51428ba98c115818229b8/commit.c#L1450 [extra headers]: https://github.com/git/git/blob/724518f3884d8707c5f51428ba98c115818229b8/commit.c#L1690 [Jujutsu]: https://github.com/jj-vcs/jj
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rebased on #1646 to fix CI |
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Oct 11, 2025
This PR contains the following updates: | Package | Change | Age | Confidence | |---|---|---|---| | [github.com/go-git/go-git/v5](https://github.com/go-git/go-git) | `v5.16.2` -> `v5.16.3` | [](https://docs.renovatebot.com/merge-confidence/) | [](https://docs.renovatebot.com/merge-confidence/) | --- ### Release Notes <details> <summary>go-git/go-git (github.com/go-git/go-git/v5)</summary> ### [`v5.16.3`](https://github.com/go-git/go-git/releases/tag/v5.16.3) [Compare Source](go-git/go-git@v5.16.2...v5.16.3) #### What's Changed - internal: Expand regex to fix build \[5.x] by [@​baloo](https://github.com/baloo) in [#​1644](go-git/go-git#1644) - build: raise timeouts for windows CI tests and disable CIFuzz \[5.x] by [@​baloo](https://github.com/baloo) in [#​1646](go-git/go-git#1646) - plumbing: support commits extra headers, support jujutsu signed commit \[5.x] by [@​baloo](https://github.com/baloo) in [#​1633](go-git/go-git#1633) **Full Changelog**: <go-git/go-git@v5.16.2...v5.16.3> </details> --- ### Configuration 📅 **Schedule**: Branch creation - Between 12:00 AM and 03:59 AM ( * 0-3 * * * ) (UTC), Automerge - Between 12:00 AM and 03:59 AM ( * 0-3 * * * ) (UTC). 🚦 **Automerge**: Disabled by config. Please merge this manually once you are satisfied. ♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox. 🔕 **Ignore**: Close this PR and you won't be reminded about this update again. --- - [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check this box --- This PR has been generated by [Renovate Bot](https://github.com/renovatebot/renovate). <!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiI0MS4xMzEuOSIsInVwZGF0ZWRJblZlciI6IjQxLjEzMS45IiwidGFyZ2V0QnJhbmNoIjoibWFpbiIsImxhYmVscyI6WyJLaW5kL0RlcGVuZGVuY3lVcGRhdGUiLCJydW4tZW5kLXRvLWVuZC10ZXN0cyJdfQ==--> Reviewed-on: https://code.forgejo.org/forgejo/runner/pulls/1062 Reviewed-by: earl-warren <earl-warren@noreply.code.forgejo.org> Co-authored-by: Renovate Bot <bot@kriese.eu> Co-committed-by: Renovate Bot <bot@kriese.eu>
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This adds support for extra headers. While git has a set of "standard headers" (
tree,parent,author,committer, andencoding), it will also support extra headers when serializing.The extra headers must come after the standard ones, but they are otherwise freetyped.
Jujutsu takes advantage of that to store its own identifier (
change-id) as an extra header.Because signatures will cover the hash of the whole commit (standard headers, extra headers and the message. Everything but the signature itself), if we deserialize a commit and then
EncodeWithoutSignatureto get back the "canonical" representation of a commit, if we don't serialize back the extra headers, the hash will no longer match and the signature will fail to verify.This adds support for parsing and reencoding the extra headers from the original commit and it's expected to fix support for Jujutsu signed commits.
Fixes #1626
This is a backport of #1627 targeting
release-5.x