fix: point SBOM generation at build/ not the zip - #23
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anchore/sbom-action treats its `path` input as a directory (it prepends `dir:` internally when invoking syft). Pointing it at `dist/github-token-broker.zip` failed because syft tried to scan the zip as if it were a directory and errored out. Scan `build/` instead — it contains just the `bootstrap` Go binary, which is exactly what we want the SBOM to describe. Syft resolves Go module dependencies directly from the binary's embedded build info. The subject of the SBOM attestation remains the zip (`dist/github-token-broker.zip`), which is correct — the attestation ties the SBOM predicate to the distributable artifact's digest. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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Summary
anchore/sbom-action treats its `path` input as a directory (prepending `dir:` when invoking syft). Pointing at the zip produced `ERROR could not determine source` during the first release.yml run.
Fix: scan `build/` instead. That directory contains just the `bootstrap` Go binary, which is what the SBOM should describe. Syft resolves Go module deps directly from the binary's embedded build info.
The SBOM attestation's subject remains the zip (`dist/github-token-broker.zip`), correctly tying the SBOM predicate to the distributable artifact's digest.
Test plan
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