name: jtreg

# The OpenJDK regression tests in test/jtreg/passing.txt, split over parallel
# jobs. A pull request runs the tests its changes need; `full` runs them all.
on:
  workflow_call:
    inputs:
      full:
        type: boolean
        default: false

permissions:
  contents: read

jobs:
  plan:
    runs-on: ubuntu-latest
    outputs:
      filters: ${{ steps.select.outputs.filters }}
      shards: ${{ steps.select.outputs.shards }}
    steps:
      - uses: actions/checkout@v7
        with:
          fetch-depth: 0
          persist-credentials: false
      - uses: actions/setup-node@v7
        with:
          node-version: 26
      - id: select
        env:
          FULL: ${{ inputs.full }}
          BASE: ${{ github.event.pull_request.base.sha }}
        # a pull request runs what its diff needs; anything else runs everything
        run: |
          if [ "$FULL" = true ] || [ -z "$BASE" ]; then arg=--full; else arg=$BASE; fi
          node scripts/jtreg/select.ts "$arg" >> "$GITHUB_OUTPUT"

  run:
    needs: plan
    if: needs.plan.outputs.shards != '[]'
    runs-on: ubuntu-latest
    timeout-minutes: 90
    strategy:
      fail-fast: false
      matrix:
        shard: ${{ fromJSON(needs.plan.outputs.shards) }}
    steps:
      - uses: actions/checkout@v7
        with:
          persist-credentials: false
      - uses: pnpm/action-setup@v6
        with:
          version: 12
      - uses: actions/setup-node@v7
        with:
          node-version: 26
          cache: pnpm
      - uses: actions/cache@v6
        with:
          # the downloads build-jdk.sh keeps; boot snapshots there stay out
          path: |
            ~/.cache/java-web/jdk-*
            ~/.cache/java-web/dejavu-*
          key: jdk-${{ runner.os }}-${{ runner.arch }}-${{ hashFiles('scripts/build-jdk.sh') }}
      - run: pnpm install --frozen-lockfile
      - run: pnpm jdk
      # each test VM starts from the bundle, which loads faster than src/
      - run: pnpm build
      - name: OpenJDK regression tests
        env:
          FILTERS: ${{ needs.plan.outputs.filters }}
        run: |
          release=$(sed -n 's/^release=//p' scripts/build-jdk.sh)
          git clone -q --filter=blob:none --sparse --depth 1 --branch "jdk-${release%+*}-ga" https://github.com/openjdk/jdk25u.git build/ref/jdk25u
          dirs=$(grep -v '^#' test/jtreg/passing.txt | cut -d/ -f1-2 | sort -u | sed 's|^|test/jdk/|')
          git -C build/ref/jdk25u sparse-checkout set test/lib test/jdk/lib test/jdk/tools/lib $dirs
          read -ra filters <<< "$FILTERS"
          node scripts/jtreg/run.ts build/ref/jdk25u --only-passing --jobs 4 --timeout 600 --vm dist/node.js \
            --shard ${{ matrix.shard }}/${{ strategy.job-total }} "${filters[@]}"
      # each test's run time, for refreshing test/jtreg/times.tsv
      - uses: actions/upload-artifact@v7
        if: always()
        with:
          name: times-${{ matrix.shard }}
          path: build/jtreg/times.tsv
          if-no-files-found: ignore
          retention-days: 30

  # one check for branch protection, whatever the number of shards
  result:
    needs: [plan, run]
    if: always()
    runs-on: ubuntu-latest
    steps:
      - env:
          PLAN: ${{ needs.plan.result }}
          RUN: ${{ needs.run.result }}
        run: test "$PLAN" = success && { test "$RUN" = success || test "$RUN" = skipped; }