cachekit-core 0.2.1

LZ4 compression, xxHash3 integrity, AES-256-GCM encryption for byte payloads
Documentation 
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name: Attestation Health Check

on:
  schedule:
    - cron: '23 3 * * 1'  # Weekly Monday 3:23am UTC
  workflow_dispatch:

jobs:
  verify:
    name: Verify Latest Release Attestations
    runs-on: cachekit
    permissions:
      contents: read
      issues: write
    steps:
      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6

      - name: Get latest release tag
        id: release
        run: |
          TAG=$(gh release list --repo ${{ github.repository }} --limit 1 --json tagName --jq '.[0].tagName' 2>/dev/null || echo "")
          if [ -z "$TAG" ]; then
            echo "No releases found, skipping"
            echo "skip=true" >> "$GITHUB_OUTPUT"
          else
            echo "tag=$TAG" >> "$GITHUB_OUTPUT"
            echo "skip=false" >> "$GITHUB_OUTPUT"
          fi
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}

      - name: Download release asset
        if: steps.release.outputs.skip != 'true'
        id: asset
        run: |
          TAG="${{ steps.release.outputs.tag }}"
          mkdir -p /tmp/release-assets
          gh release download "$TAG" --repo ${{ github.repository }} \
            --pattern "*.crate" --dir /tmp/release-assets 2>/dev/null || true
          CRATE=$(find /tmp/release-assets -name '*.crate' -print -quit)
          if [ -z "$CRATE" ]; then
            echo "::warning::No .crate asset found for $TAG, checking repo-level attestations"
            echo "has_asset=false" >> "$GITHUB_OUTPUT"
          else
            echo "asset=$CRATE" >> "$GITHUB_OUTPUT"
            echo "has_asset=true" >> "$GITHUB_OUTPUT"
          fi
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}

      - name: Verify provenance attestation
        if: steps.release.outputs.skip != 'true'
        run: |
          TAG="${{ steps.release.outputs.tag }}"
          echo "Verifying provenance attestation for $TAG"
          if [ "${{ steps.asset.outputs.has_asset }}" = "true" ]; then
            gh attestation verify "${{ steps.asset.outputs.asset }}" \
              --repo ${{ github.repository }} \
              --predicate-type https://slsa.dev/provenance/v1
          else
            # No downloadable .crate asset — verify attestations exist for the repo
            PROVENANCE=$(gh attestation list --repo ${{ github.repository }} \
              --predicate-type https://slsa.dev/provenance/v1 --limit 1 --jq 'length')
            if [ "$PROVENANCE" = "0" ] || [ -z "$PROVENANCE" ]; then
              echo "::error::No provenance attestation found"
              exit 1
            fi
          fi
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}

      - name: Verify SBOM attestation
        if: steps.release.outputs.skip != 'true'
        run: |
          TAG="${{ steps.release.outputs.tag }}"
          echo "Verifying SBOM attestation for $TAG"
          if [ "${{ steps.asset.outputs.has_asset }}" = "true" ]; then
            gh attestation verify "${{ steps.asset.outputs.asset }}" \
              --repo ${{ github.repository }} \
              --predicate-type https://spdx.dev/Document/v2.3 || \
            gh attestation verify "${{ steps.asset.outputs.asset }}" \
              --repo ${{ github.repository }} \
              --predicate-type https://cyclonedx.org/bom/v1.6
          else
            SBOM=$(gh attestation list --repo ${{ github.repository }} \
              --predicate-type https://cyclonedx.org/bom/v1.6 --limit 1 --jq 'length' 2>/dev/null || echo "0")
            SPDX=$(gh attestation list --repo ${{ github.repository }} \
              --predicate-type https://spdx.dev/Document/v2.3 --limit 1 --jq 'length' 2>/dev/null || echo "0")
            if [ "$SBOM" = "0" ] && [ "$SPDX" = "0" ]; then
              echo "::error::No SBOM attestation found (checked CycloneDX and SPDX)"
              exit 1
            fi
          fi
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}

      - name: Open issue on failure
        if: failure()
        run: |
          gh issue create \
            --repo ${{ github.repository }} \
            --title "Attestation verification failed for ${{ steps.release.outputs.tag }}" \
            --body "Weekly attestation health check failed. Verify that the release workflow produced valid provenance and SBOM attestations." \
            --label "bug"
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}