Skip Docker image builds on forks without their own registry - #20
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The Docker image workflow publishes to ghcr.io/block/buzz unless the repo variable GHCR_IMAGE names another registry. On a fork that has not set it, every push to main and every same-repo pull request fails: the build tries to push to Block's registry, or to its build cache, and is denied. build, push-gateway-build and qualify now run only upstream, or on a fork that has set GHCR_IMAGE. The merge jobs need the builds, so they skip with them. Upstream behaviour is unchanged, and a fork that wants its own images opts in by setting the variable the workflow already reads. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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Why
On this fork the Docker image workflow fails on every push to
mainand on every same-repo pull request: it builds relay images and tries to push them, or its build cache, toghcr.io/block/buzz, which a fork cannot write to (denied: permission_denied).Change
build,push-gateway-buildandqualifynow run only whengithub.repository == 'block/buzz' || vars.GHCR_IMAGE != ''. The two merge jobs depend on the builds, so they skip with them.GHCR_IMAGE, the variable the workflow already reads, and it runs.Three lines plus a comment, so future upstream merges stay easy. Written as a PR because this session isn't permitted to change repository settings, so disabling the workflow wasn't available.
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