ci(docker): fix Argument list too long when signing bake outputs#283
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chopratejas merged 1 commit intomainfrom Apr 27, 2026
Merged
ci(docker): fix Argument list too long when signing bake outputs#283chopratejas merged 1 commit intomainfrom
chopratejas merged 1 commit intomainfrom
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The cosign signing step passed bake metadata via env var:
env:
BAKE_META: ${{ steps.bake.outputs.metadata }}
run: echo "$BAKE_META" | jq ...
For large bake targets (code-nonroot, runtime-code-nonroot) the
metadata JSON is large enough that combined argv+env at bash spawn
exceeds Linux ARG_MAX (~128 KiB on ubuntu-latest), so bash dies with
E2BIG before the script even runs.
Switch to writing metadata into a heredoc-backed temp file, then read
it via jq file input. Heredocs put the JSON in the script body itself,
which bash reads from a temp file (no ARG_MAX limit), bypassing the
env-size ceiling entirely.
Module: .github/workflows/docker.yml
This was referenced Apr 27, 2026
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Summary
publish-docker / docker-variant-tagswas failing for thecode-nonrootandruntime-code-nonrootbake targets withArgument list too long.BAKE_META: \${{ steps.bake.outputs.metadata }}was passed as an env var. For those large variants the JSON metadata pushes combined argv+env past Linux ARG_MAX (~128 KiB on ubuntu-latest), so bash dies with E2BIG before the script body can run.\${RUNNER_TEMP}/bake_meta.jsonvia a single-quoted heredoc and feed it tojqfrom disk. Heredoc bodies live in the script (read by bash from a temp file), so they don't count against env size.Failing run
Test plan
make ci-precheck(commitlint, ruff, mypy, pytest, cargo fmt/clippy/test) green locally before pushpublish-docker / docker-variant-tagsmatrix succeeds for all 8 variants — includingcode-nonrootandruntime-code-nonroot\${REGISTRY}/\${image}-signaturesas before; verify by checking package version listing on GHCR after merge