Update builder-shim to 0.6.3 for metadata only Dockerfile support #825
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…d add some tests for the same
jglogan
approved these changes
Oct 30, 2025
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Type of Change
Motivation and Context
BuildKit returns nil ref for Dockerfiles containing only metadata (
ENV/ARG/LABEL) directives without filesystem operations (RUN/COPY/ADD). Previously, this caused builds to fail with "no build directives" error.Builder-shim 0.6.3 fixes this by creating a minimal marker layer when ref is nil but image config is valid, satisfying OCI manifest requirements.
Also, added some tests for this behavior.
Testing