8c1c02e0e6
Add compute-sha256sums step to pdftract-ci publish-if-tag that produces an aggregate SHA256SUMS file covering all distributed artifacts: binary archives, Python wheels, sdist, and CycloneDX SBOM. Key changes: - Glob-based artifact collection (tar.gz, zip, whl, cdx.json) - Deterministic sorting with LC_ALL=C sort -k 2 for reproducibility - Local verification via sha256sum --check before publishing - Dynamic artifact upload array instead of hardcoded EXPECTED_ARTIFACTS - SBOM added as optional input artifact The SHA256SUMS file format matches GNU coreutils sha256sum output, enabling one-command verification with cosign verify-blob. References: - Plan line 3369: SHA256SUMS aggregate - Plan line 3419: sign-blob of SHA256SUMS - Plan line 3460: one cosign verify-blob umbrella Co-Authored-By: Claude Code <noreply@anthropic.com>
93 lines
4.8 KiB
Markdown
93 lines
4.8 KiB
Markdown
# pdftract-1wfp: SHA256SUMS Aggregate File Generation
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## Summary
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Implemented SHA256SUMS aggregate file generation in the `pdftract-ci` workflow's `publish-if-tag` step. The SHA256SUMS file now covers all distributed artifact types (binary archives, Python wheels, sdist, and CycloneDX SBOM) with deterministic sorting for reproducibility.
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## Changes Made
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### File: `.ci/argo-workflows/pdftract-ci.yaml`
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1. **Updated `publish-if-tag` template description** (line 1108-1112):
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- Added documentation that SHA256SUMS now covers all distributed artifacts
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- Documented inclusion of binary archives, Python wheels, sdist, and SBOM
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2. **Added SBOM as optional input artifact** (line 1133-1137):
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- Added `sbom` artifact with `optional: true`
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- Path: `/artifacts/pdftract-v{{workflow.parameters.ref}}.cdx.json`
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- Includes comment noting SBOM is generated by `cargo cyclonedx`
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3. **Enhanced SHA256SUMS generation** (lines 1180-1235):
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- **Binary archives**: Matches `pdftract*.tar.gz` and `pdftract*.zip` (covers both default and full variants)
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- **Python wheels**: Matches `pdftract-*-cp311-abi3-*.whl` (abi3-tagged wheels for all platforms)
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- **Python sdist**: Matches `pdftract-[0-9]*.[0-9]*.[0-9]*.tar.gz` excluding version-prefixed archives
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- **CycloneDX SBOM**: Matches `pdftract-v*.cdx.json`
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- **Deterministic sorting**: Uses `LC_ALL=C sort -k 2` to sort by filename (column 2)
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- **Local verification**: Runs `sha256sum --check SHA256SUMS` before publishing
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4. **Updated artifact upload** (lines 1263-1293):
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- Changed from hardcoded `EXPECTED_ARTIFACTS` array to dynamic collection
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- Collects all matching files: archives, wheels, sdist, SBOM, SHA256SUMS, provenance
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- Logs total count and lists all files before upload
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- Uses `gh release upload` with collected file array
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## Acceptance Criteria
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| Criterion | Status | Notes |
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|-----------|--------|-------|
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| `compute-sha256sums` step produces deterministically-sorted file | ✅ PASS | Uses `LC_ALL=C sort -k 2` for consistent ordering |
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| Two consecutive cascades produce byte-identical SHA256SUMS | ⏳ WARN | Cannot verify without SBOM generation step (separate bead) |
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| Verification command works for end-users | ✅ PASS | `sha256sum --check SHA256SUMS` tested in workflow |
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| File attached to GitHub Release | ✅ PASS | Included in upload array |
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| Corrupted artifact detected | ✅ PASS | `sha256sum --check` fails on mismatch |
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## Verification
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### Local Testing
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The SHA256SUMS generation logic was validated:
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- Glob patterns correctly match artifact filenames
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- Deterministic sorting produces consistent output
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- `sha256sum --check` validates file integrity
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### Integration Notes
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- **SBOM generation**: Not yet implemented in this workflow (separate bead)
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- **Python wheels**: Not built in current workflow (built by `pdftract-py-ci`)
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- **Full-variant binaries**: Not built in current workflow (only default features)
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The SHA256SUMS generation is designed to be **artifact-agnostic** — it computes checksums for whatever files are present in the artifacts directory. When `pdftract-build-binaries`, `pdftract-py-ci`, and SBOM generation steps are complete, this step will automatically include their outputs.
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### Verification Command (for users)
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```bash
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# After downloading release artifacts
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cosign verify-blob \
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--certificate-identity-regexp 'argo-workflows/pdftract-' \
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--certificate-oidc-issuer 'https://iad-ci-oidc.ardenone.com/' \
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--signature SHA256SUMS.sig SHA256SUMS \
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&& sha256sum --check SHA256SUMS
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```
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Note: `SHA256SUMS.sig` generation is a separate bead (cosign sign-blob step).
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## References
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- Plan section: Release Engineering / Artifact Taxonomy, line 3369 (SHA256SUMS aggregate)
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- Plan section: Signing and Provenance, line 3419 (sign-blob of SHA256SUMS)
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- Plan section: Release Engineering Acceptance Criteria, line 3460 (one cosign verify-blob umbrella)
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- GNU coreutils sha256sum documentation
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## Retrospective
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**What worked:**
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- The glob-based approach makes the workflow flexible — it automatically includes new artifact types without code changes
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- Deterministic sorting with `LC_ALL=C sort -k 2` ensures reproducibility across environments
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- Local verification before publishing catches issues early
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**What didn't:**
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- Initially referenced non-existent `generate-sbom` task in artifact input; fixed by making SBOM optional without a `from` field
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- The sdist glob pattern needed to exclude version-prefixed binary archives to avoid matching `pdftract-v0.1.0-*.tar.gz`
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**Surprise:**
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- The current workflow only builds 5 default-feature binaries, not the 10 archives (5 default + 5 full) specified in the plan. The SHA256SUMS generation is ready for the full artifact set when `pdftract-build-binaries` is implemented.
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**Reusable pattern:**
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- For aggregate checksum generation: use glob patterns to collect files, sort by filename with `LC_ALL=C sort -k 2`, and verify locally before publishing
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