subsystem.yml

name: subsystem
on: [pull_request]
env:
  USER: runner
  JAVA_OPTS: "-Duser.home=/run/github-runner/sequencer"

# Cancel the current workflow when new commit pushed
concurrency:
  group: ${{ github.workflow }}-${{ github.event.pull_request.number }}
  cancel-in-progress: true

jobs:
  build-emulators:
    name: "Build Emulators"
    runs-on: [self-hosted, linux, nixos, AMD Ryzen 9 7940HS w/ Radeon 780M Graphics]
    strategy:
      matrix:
        config:
          - "v1024-l8-b2"
          - "v1024-l8-b2-fp"
          - "v4096-l8-b4"
          - "v4096-l8-b4-fp"
    steps:
      - uses: actions/checkout@v4
        with:
          ref: ${{ github.event.pull_request.head.sha }}
      - name: "Build verilator emulator"
        run: |
          nix build '.#t1.${{ matrix.config }}.subsystem.emu' -L --no-link --cores 64

  gen-matrix:
    name: "Prepare for running testcases"
    needs: [build-emulators]
    runs-on: [self-hosted, linux, nixos, "AMD Ryzen 9 7940HS w/ Radeon 780M Graphics"]
    env:
      RUNNERS: 70
    outputs:
      ci-tests: ${{ steps.gen-matrix.outputs.matrix }}
    steps:
      # actions/checkout will use the "event" commit to checkout repository,
      # which will lead to an unexpected issue that the "event" commit doesn't belongs to the repository,
      # and causing the derivation build output cannot be cache correctly.
      - uses: actions/checkout@v4
        with:
          ref: ${{ github.event.pull_request.head.sha }}
      - name: "Build all testcases"
        run: |
          # Build testcases with vlen 1024 and vlen 4096
          nix build ".#t1.v1024-l8-b2.cases.all" --max-jobs auto -L --no-link --cores 64
          nix build ".#t1.v4096-l8-b4.cases.all" --max-jobs auto -L --no-link --cores 64
      - id: gen-matrix
        name: "Generate test matrix"
        run: |
          echo -n matrix= >> "$GITHUB_OUTPUT"
          nix shell ".#ammonite" -c .github/scripts/ci.sc generateCiMatrix subsystem.json "$RUNNERS" >> "$GITHUB_OUTPUT"

  build-trace-emulators:
    name: "Build trace emulator"
    needs: [gen-matrix]
    runs-on: [self-hosted, linux, nixos, AMD Ryzen 9 7940HS w/ Radeon 780M Graphics]
    strategy:
      fail-fast: false
      matrix:
        config:
          - "v1024-l8-b2"
          - "v1024-l8-b2-fp"
          - "v4096-l8-b4"
          - "v4096-l8-b4-fp"
    steps:
      - uses: actions/checkout@v4
        with:
          ref: ${{ github.event.pull_request.head.sha }}
      - name: "Build verilator emulator with trace"
        run: nix build '.#t1.${{ matrix.config }}.subsystem.emu-trace' -L --no-link --cores 64

  test-emit:
    name: "Test elaborate"
    runs-on: [self-hosted, linux, nixos]
    steps:
      - uses: actions/checkout@v4
        with:
          ref: ${{ github.event.pull_request.head.sha }}
      - name: "Test elaborate"
        run: |
          set -e
          nix build '.#t1.configgen' -L --out-link ./config-gen
          for cfg in $(jq -r '.[]' ./config-gen/share/all-supported-configs.json); do
            echo "Building .#t1.${cfg}.subsystem.rtl"
            nix build ".#t1.${cfg}.subsystem.rtl" -L
          done

  run-testcases:
    name: "Run testcases"
    needs: [gen-matrix]
    strategy:
      fail-fast: false
      matrix: ${{ fromJSON(needs.gen-matrix.outputs.ci-tests) }}
    runs-on: [self-hosted, linux, nixos]
    outputs:
      result: ${{ steps.ci-run.outputs.result }}
    steps:
      - uses: actions/checkout@v4
        with:
          ref: ${{ github.event.pull_request.head.sha }}
      - name: "Run testcases"
        id: ci-run
        run: |
          nix shell ".#ammonite" -c .github/scripts/ci.sc runTests \
            --runTarget subsystem \
            --jobs "${{ matrix.jobs }}" \
            --resultDir test-results-$(head -c 10 /dev/urandom | base32)

      - uses: actions/upload-artifact@v4
        if: ${{ !cancelled() }}
        with:
          name: test-reports-${{ matrix.id }}
          path: |
            test-results-*/failed-tests.md

      - uses: actions/upload-artifact@v4
        if: failure()
        with:
          name: failed-logs-${{ matrix.id }}
          path: test-results-*/failed-logs

  gen-fail-wave-matrix:
    name: "Generate matrix for re-testing failing tests"
    if: ${{ !cancelled() }}
    needs: [run-testcases]
    runs-on: [self-hosted, linux, nixos]
    outputs:
      generate_wave: ${{ steps.generate-matrix.outputs.generate_wave }}
      retry_tasks: ${{ steps.generate-matrix.outputs.retry_tasks }}
    steps:
      - uses: actions/download-artifact@v4
        with:
          pattern: test-reports-*
          merge-multiple: true
      - id: generate-matrix
        name: "Generate matrix"
        run: |
          touch all-fail-tests.txt
          shopt -s nullglob
          cat test-results-*/failed-tests.md > all-failed-tests.txt
          retry=$(sed 's/\* //' all-failed-tests.txt | shuf -n3)  # only retry last three failed
          echo "build wave for: $retry"
          if [ -n "$retry" ]; then
            echo "generate_wave=true" >> "$GITHUB_OUTPUT"
            echo -n "retry_tasks=" >> "$GITHUB_OUTPUT"
            echo "$retry" | \
              jq -nR --indent 0 '{"include": [inputs | {"job": ., "id": (input_line_number)}]}' >> "$GITHUB_OUTPUT"
          fi

  build-fail-wave:
    name: "Generate wave for failing tests"
    needs: [build-emulators, gen-fail-wave-matrix]
    if: ${{ !cancelled() && needs.gen-fail-wave-matrix.outputs.generate_wave == 'true'  }}
    strategy:
      fail-fast: false
      matrix: ${{ fromJSON(needs.gen-fail-wave-matrix.outputs.retry_tasks) }}
    runs-on: [self-hosted, linux, nixos]
    steps:
      - uses: actions/checkout@v4
        with:
          ref: ${{ github.event.pull_request.head.sha }}
      - name: "Run failed testcases"
        run: |
          nix shell ".#ammonite" -c .github/scripts/ci.sc runFailedTests --runTarget subsystem --jobs "${{ matrix.job }}"
          waveFile=$(find testrun -name 'wave.fst')
          hierFile=$(find testrun -name 'wave.hier')
          if [[ -z "$waveFile" || -n "$hierFile" ]]; then  # when emulator failed, .hier is not merged into .fst
            echo "Verilator doesn't generate wave correctly"
            exit 1
          fi
          mv "$waveFile" ./wave-${{ matrix.job }}.fst
      - uses: actions/upload-artifact@v4
        with:
          name: failed-tests-wave-${{ matrix.id }}
          path: 'wave-*.fst'
      - run: |
          echo "Test ${{ matrix.job }} run fail"
          # We are just running post action for failing test, so we need to avoid the workflow finishing successfully
          exit 1

  report:
    name: "Report CI result"
    if: ${{ !cancelled() }}
    needs: [run-testcases]
    runs-on: [self-hosted, linux, nixos]
    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 0
          ref: ${{ github.head_ref }}
      - uses: actions/download-artifact@v4
        with:
          pattern: test-reports-*
          merge-multiple: true
      - name: "Print step summary"
        run: |
          echo -e "\n## Failed tests\n" >> $GITHUB_STEP_SUMMARY
          shopt -s nullglob
          cat test-results-*/failed-tests.md >> $GITHUB_STEP_SUMMARY