validate-branches.yml

name: Validate learner branches

# Validation gate for the ACC start-of-module-N delta store. Runs on any PR that
# touches the delta store / course-build tooling, and is reusable (workflow_call)
# so the dispatch receiver can gate a regen PR on the same checks.

on:
  pull_request:
    paths:
      - 'course-build/**'
      - '.github/workflows/validate-branches.yml'
  workflow_dispatch:
    inputs:
      dispatch_id:
        description: 'Staging namespace to validate (regen/<id>/...)'
        required: false
        default: 'ci-manual'
      ref:
        description: 'Git ref (branch/SHA) to validate'
        required: false
        default: ''
  workflow_call:
    inputs:
      dispatch_id:
        description: 'Staging namespace to validate'
        required: false
        type: string
        default: 'ci-call'
      ref:
        description: 'Git ref (branch/SHA) to validate. Defaults to the caller ref.'
        required: false
        type: string
        default: ''

permissions:
  contents: read

concurrency:
  group: validate-branches-${{ github.ref }}-${{ inputs.ref }}
  cancel-in-progress: true

jobs:
  # Fast, deterministic checks: deltas apply cleanly onto acc-base, each cumulative
  # tree matches manifest.expectedTreeSha, expected .github assets present, ancestry
  # linear. Also emits the buildable start-branch matrix for the heavy job.
  verify-deltas:
    runs-on: ubuntu-latest
    outputs:
      branches: ${{ steps.matrix.outputs.branches }}
    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 0   # need full history + base commit for git am
          ref: ${{ inputs.ref || github.ref }}
      - uses: actions/setup-node@v4
        with:
          node-version: '22'
      - name: Ensure base commit present
        run: git fetch --no-tags origin "$(node -e "console.log(require('./course-build/manifest.json').base.sha)")" || true
      - name: Deterministic delta check (trees, assets, ancestry)
        run: node course-build/scripts/build-branches.mjs --check
      - name: Self-test (classification + path detection)
        run: node course-build/scripts/selftest.mjs
      - name: Compute buildable start-branch matrix
        id: matrix
        run: |
          branches=$(node -e "const m=require('./course-build/manifest.json');const b=m.modules.filter(x=>x.status==='backfilled'&&(x.patches||[]).length).map(x=>x.startBranch);process.stdout.write(JSON.stringify(b))")
          echo "branches=$branches" >> "$GITHUB_OUTPUT"
          echo "Buildable: $branches"

  # Secret scan of the delta store and everything the built branches would contain.
  secret-scan:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 0
          ref: ${{ inputs.ref || github.ref }}
      - name: gitleaks (delta store + course-build)
        uses: gitleaks/gitleaks-action@v2
        env:
          GITLEAKS_ENABLE_UPLOAD_ARTIFACT: 'false'
          GITLEAKS_ENABLE_SUMMARY: 'true'

  # Heavy gate: build each buildable learner branch from deltas and run the suites
  # that exist in that cumulative state (web / .NET / Java / Python / Playwright),
  # plus the no-uncommitted-files-after-setup assertion.
  build-and-test:
    needs: verify-deltas
    if: needs.verify-deltas.outputs.branches != '[]'
    runs-on: ubuntu-latest
    strategy:
      fail-fast: false
      matrix:
        start_branch: ${{ fromJSON(needs.verify-deltas.outputs.branches) }}
    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 0
          ref: ${{ inputs.ref || github.ref }}
      - uses: actions/setup-node@v4
        with:
          node-version: '22'
      - uses: actions/setup-dotnet@v4
        with:
          dotnet-version: '10.0'
      - uses: actions/setup-python@v5
        with:
          python-version: '3.12'
      - uses: actions/setup-java@v4
        with:
          distribution: 'temurin'
          java-version: '21'
      - name: Ensure base commit present
        run: git fetch --no-tags origin "$(node -e "console.log(require('./course-build/manifest.json').base.sha)")" || true
      - name: Configure git identity (for git am)
        run: |
          git config user.name "acc-course-bot"
          git config user.email "acc-course-bot@users.noreply.github.com"
      - name: Build + validate ${{ matrix.start_branch }}
        run: bash course-build/scripts/validate-branch.sh "${{ matrix.start_branch }}"
        env:
          DISPATCH_ID: ci-${{ github.run_id }}

  # Aggregate result used as the required status check / workflow_call output.
  summary:
    needs: [verify-deltas, secret-scan, build-and-test]
    if: always()
    runs-on: ubuntu-latest
    steps:
      - name: Fail if any gate failed
        run: |
          echo "verify-deltas: ${{ needs.verify-deltas.result }}"
          echo "secret-scan:   ${{ needs.secret-scan.result }}"
          echo "build-and-test:${{ needs.build-and-test.result }}"
          test "${{ needs.verify-deltas.result }}" = "success"
          test "${{ needs.secret-scan.result }}" = "success"
          test "${{ needs.build-and-test.result }}" = "success"