fuzz.yml

name: Fuzz test
on:
  pull_request:
  push:
    branches:
      - main
      - mq-working-branch-*
  schedule:
    - cron: '0 6 * * *'

jobs:
  setup:
    runs-on: ubuntu-latest
    outputs:
      fuzz-dirs: ${{ steps.set-dirs.outputs.fuzz-dirs }}
      fuzz-dirs-count: ${{ steps.set-dirs.outputs.fuzz-dirs-count }}
    steps:
    - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # 4.2.2
      with:
        fetch-depth: 0
    - name: Get crates report
      id: changed-crates
      uses: ./.github/actions/crates-reporter
    - name: Set fuzz directories
      id: set-dirs
      env:
        CHANGED_CRATES_STATUS: ${{ steps.changed-crates.outputs.status }}
        AFFECTED_CRATES: ${{ steps.changed-crates.outputs.affected_crates }}
      run: |
        ALL_FUZZ='["libdd-alloc", "libdd-profiling", "libdd-common-ffi", "libdd-trace-utils"]'
        if [[ "$CHANGED_CRATES_STATUS" == "success" ]]; then
          FILTERED=$(echo "$AFFECTED_CRATES" | jq -c --argjson affected "$ALL_FUZZ" '[.[] | select(IN($affected[]))]')
          COUNT=$(echo "$FILTERED" | jq 'length')
        else
          FILTERED="$ALL_FUZZ"
          COUNT=$(echo "$ALL_FUZZ" | jq 'length')
        fi
        echo "fuzz-dirs=$FILTERED" >> $GITHUB_OUTPUT
        echo "fuzz-dirs-count=$COUNT" >> $GITHUB_OUTPUT

  run-fuzz:
    needs: setup
    if: needs.setup.outputs.fuzz-dirs-count != '0'
    runs-on: ubuntu-latest
    strategy:
      matrix:
        directory: ${{ fromJson(needs.setup.outputs.fuzz-dirs) }}
    env:
      CARGO_TERM_COLOR: always
      CARGO_INCREMENTAL: 0
    steps:
    - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # 4.2.2
    - name: Set up Rust
      run: |
        set -e
        rustup set profile minimal
        rustup toolchain install nightly-2026-02-08
        rustup default nightly-2026-02-08
    - uses: taiki-e/install-action@2c41309d51ede152b6f2ee6bf3b71e6dc9a8b7df # 2.49.27
      with:
        tool: cargo-bolero
    - name: Cache [rust]
      uses: Swatinem/rust-cache@f13886b937689c021905a6b90929199931d60db1 # 2.8.1
      with:
        cache-targets: true # cache build artifacts
        cache-bin: true # cache the ~/.cargo/bin directory
    - run: |
        set -e
        # cargo bolero list outputs {"package":"package-name","test":"test-name"}
        pushd ${{ matrix.directory }}
        cargo bolero list | \
        # And the following command will parse package-name's and test-name's one in each line
        grep -oP '"(package|test)"\s*:\s*"\K[^"]+' | \
        # awk will stitch package and test names back separated by a tab
        awk 'NR%2{printf "%s\t", $0; next}1' | \
        while read -r package test;
        do
          echo "****** Starting bolero test for $package $test ******" 1>&2
          cargo bolero test -T 30s --package $package $test
        done
        popd