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Checkout PR ref when creating mirror images#169

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sarahchen6 merged 2 commits into
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sarahchen6/use-pr-ref
Jul 6, 2026
Merged

Checkout PR ref when creating mirror images#169
sarahchen6 merged 2 commits into
masterfrom
sarahchen6/use-pr-ref

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@sarahchen6 sarahchen6 commented Jul 2, 2026

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Checkout the repo at the inputted PR ref when creating mirror images. This ensures that new CI_VARIANTS included in the PR, e.g. for adding new JDK versions, are mirrored instead of using the master branch's CI_VARIANTS.

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Comment thread .github/workflows/create-test-mirror-pr.yml
uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
with:
path: dd-trace-java-docker-build
ref: refs/pull/${{ github.event.inputs.pr_number }}/merge

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Just thinking if we really need this?
I think that if we need to update CI_VARAINTS we can simply merge that to master in order not to produce one-time-use images. WDYT?
Or probably we better start working on moving this image into dd-trace-java directly.
I recall @bric3 mentioned that it is very possible.

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I think that if we need to update CI_VARAINTS we can simply merge that to master in order not to produce one-time-use images. WDYT?

We'd only produce one extra one-time-use image (for the new variant) in the same group that gets deleted with the other test CI images 🤔 - which reminds me to apply this to the delete workflow too. The changes don't add any permanent images or additional workflows.

The CI_VARIANTS variable determines how the images are tagged, so if we added the variant to master first, we'd be adding a new tagged image to the master workflow without it being tested.

I think it makes more sense to be updating the CI_VARIANTS tagging in the same PR that the image itself is tested and added.

probably we better start working on moving this image into dd-trace-java directly.

This comment explains why we should stick to two separate workflows.

@sarahchen6 sarahchen6 merged commit 6c6a67e into master Jul 6, 2026
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@sarahchen6 sarahchen6 deleted the sarahchen6/use-pr-ref branch July 6, 2026 20:03
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Confirmed this works with the changes in #168: https://github.com/DataDog/images/pull/10529/changes!

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2 participants