ci: skip the build in the merge queue for changes that don't affect the images

[viceice]

Changes

Runs the check for changes that don't need the build in the merge queue too, diffing the group against its base, so a group that only changes docs, the dev container or repo settings skips the docker build and tests there as well. Pushes to main and maint/** still always run everything, as they release.

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Claude Opus 5.5 (Claude Code) wrote the workflow change and checked it with jactionlint.

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Reviewing files that changed from the base of the PR and between d1a4211 and 207541a.

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[qodo-code-review]

PR Summary by Qodo

Skip merge-queue builds for changes that do not affect images

✨ Enhancement ⚙️ Configuration changes 🕐 10-20 Minutes

AI Description

• Check merge-queue changes against the group's base, extending the existing pull-request build
 filter.
• Skip Docker builds and tests for qualifying groups; retain full builds for release pushes.

Diagram

graph TD
  PR["Pull request"] --> Compare["Compare base"] --> Gate{"Build needed?"} --> Docker["Docker jobs"]
  Merge["Merge group"] --> Compare
  Gate --> Bats["Bats tests"]
  Push["Release push"] --> Docker

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High-Level Assessment

Reusing the existing changed-file filter is appropriate: it applies one exclusion policy to pull requests and merge groups while leaving release pushes untouched. Separate merge-queue filtering would duplicate that policy.

Files changed (1) +7 / -7

Other (1) +7 / -7

build.ymlApply the build-skip check to merge groups +7/-7

Apply the build-skip check to merge groups

• Runs the existing changed-file check for merge-group events as well as pull requests, using the merge group's base SHA for comparison. Updates the comment to clarify that pushes still run the full build.

.github/workflows/build.yml

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