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x/build/cmd/gerritbot: not possible to make cherry-pick CLs via PRs #30037

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dmitshur opened this issue Jan 31, 2019 · 0 comments
Open

x/build/cmd/gerritbot: not possible to make cherry-pick CLs via PRs #30037

dmitshur opened this issue Jan 31, 2019 · 0 comments
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Builders x/build issues (builders, bots, dashboards) FeatureRequest NeedsInvestigation Someone must examine and confirm this is a valid issue and not a duplicate of an existing one.
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Unplanned

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@dmitshur
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dmitshur commented Jan 31, 2019 •
edited

I investigated whether it's possible to create cherry-pick CLs by making a Pull Request, a question that was brought up on the golang-dev mailing list here and in issue #25020.

In order to learn whether it's supported, I made an attempt and learned from the experience:

It was possible to create the cherry-pick CL against the correct release branch by having the appropriate base branch in the PR.

However, gerritbot does not recognize it when the PR description contains Change-Id and other lines from the commit being backported. In the PR, the description ended with:

<body>

Change-Id: I09a2212eb74c63db575223277aec363c55421ed8
Reviewed-on: https://go-review.googlesource.com/c/159157
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Filippo Valsorda <filippo@golang.org>

In the imported CL, the commit message ended up having:

<body>

Change-Id: I09a2212eb74c63db575223277aec363c55421ed8
Reviewed-on: https://go-review.googlesource.com/c/159157
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Filippo Valsorda <filippo@golang.org>

Change-Id: I09a2212eb74c63db575223277aec363c55421ed8
GitHub-Last-Rev: 396cc6b3a61292ccbe3ccad4e55c3a9842145cab
GitHub-Pull-Request: golang/go#29926

In order for it to be possible to make cherry-pick CLs via gerritbot, it would need to gain support for recognizing when the PR description contains Change-Id lines from the original commit, and reuse it. So the final commit message imported by gerritbot would need to look something like:

<body>

Change-Id: I09a2212eb74c63db575223277aec363c55421ed8
Reviewed-on: https://go-review.googlesource.com/c/159157
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Filippo Valsorda <filippo@golang.org>
GitHub-Last-Rev: 396cc6b3a61292ccbe3ccad4e55c3a9842145cab
GitHub-Pull-Request: golang/go#29926

Until this is resolved, it's not possible to send cherry-pick CLs via Pull Requests. /cc @andybons
@dmitshur dmitshur added this to the Unplanned milestone Jan 31, 2019
@gopherbot gopherbot added the Builders x/build issues (builders, bots, dashboards) label Jan 31, 2019
@dmitshur dmitshur added the NeedsInvestigation Someone must examine and confirm this is a valid issue and not a duplicate of an existing one. label Jan 31, 2019
This was referenced Jul 13, 2020
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