name: fuzzing
on:
  workflow_call:
permissions:
  contents: read

jobs:
  fuzzing:
    name: Run Go Fuzz Tests
    runs-on: ubuntu-latest
    strategy:
      matrix:
        fuzz_test: [[FuzzParseMetricText, FuzzParseOpenMetric], [FuzzParseMetricSelector, FuzzParseExpr], [FuzzXORChunk, FuzzXOR2Chunk], [FuzzParseProtobuf]]
    steps:
      - name: Checkout repository
        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
        with:
          persist-credentials: false
      - name: Install Go
        uses: actions/setup-go@4a3601121dd01d1626a1e23e37211e3254c1c06c # v6.4.0
        with:
          go-version: 1.26.x
      - name: Run Fuzzing
        run: |
          for fuzz_test in ${{ join(matrix.fuzz_test, ' ') }}; do
            go test -fuzz="${fuzz_test}$" -fuzztime=4m ./util/fuzzing
          done
        id: fuzz
      - name: Upload Crash Artifacts
        uses: actions/upload-artifact@330a01c490aca151604b8cf639adc76d48f6c5d4 # v5.0.0
        if: failure()
        with:
          name: fuzz-artifacts-${{ join(matrix.fuzz_test, '-') }}
          path: util/fuzzing/testdata/fuzz/
  fuzzing_status:
    # This status check aggregates the individual matrix jobs of the fuzzing
    # step into a final status. Fails if a single matrix job fails, succeeds if
    # all matrix jobs succeed.
    name: Fuzzing
    runs-on: ubuntu-latest
    needs: [fuzzing]
    if: always()
    steps:
      - name: Successful fuzzing
        if: ${{ !(contains(needs.*.result, 'failure')) && !(contains(needs.*.result, 'cancelled')) }}
        run: exit 0
      - name: Failing or cancelled fuzzing
        if: ${{ contains(needs.*.result, 'failure') || contains(needs.*.result, 'cancelled') }}
        run: exit 1