name: Fuzzing

on:
  # Regression testing
  push:
    branches: 
      - master
  pull_request:
    branches: 
      - master

  # Daily midnight fuzzing
  schedule:
    - cron: '0 0 * * *'

jobs:
  fuzzing:
    name: Fuzzing

    strategy:
      matrix:
        os: [ ubuntu-latest ]
        go-version: [ 1.14.x ]
    runs-on: ${{ matrix.os }}

    steps:
    - name: Install Go
      uses: actions/setup-go@v1
      with:
        go-version: ${{ matrix.go-version }}

    - name: Checkout code
      uses: actions/checkout@v2

    - name: Download go-fuzz tools and the Fuzzit CLI, move Fuzzit CLI to GOBIN
      # If we decide we need to prevent this from running on forks, we can use this line:
      # if: github.repository == 'caddyserver/caddy'
      run: |
        # Install Clang-7.0 because other versions seem to be missing the file libclang_rt.fuzzer-x86_64.a
        sudo add-apt-repository "deb http://apt.llvm.org/xenial/ llvm-toolchain-xenial-7 main"
        wget -O - https://apt.llvm.org/llvm-snapshot.gpg.key | sudo apt-key add -
        sudo apt update && sudo apt install -y clang-7 lldb-7 lld-7

        go get -v github.com/dvyukov/go-fuzz/go-fuzz github.com/dvyukov/go-fuzz/go-fuzz-build
        wget -q -O fuzzit https://github.com/fuzzitdev/fuzzit/releases/download/v2.4.77/fuzzit_Linux_x86_64
        chmod a+x fuzzit
        mv fuzzit $(go env GOPATH)/bin
        echo "::add-path::$(go env GOPATH)/bin"

    - name: Generate fuzzers & submit them to Fuzzit
      continue-on-error: true
      env:
        FUZZIT_API_KEY: ${{ secrets.FUZZIT_API_KEY }}
      run: |
        declare -A fuzzers_funcs=(\
          ["./caddyconfig/httpcaddyfile/addresses_fuzz.go"]="FuzzParseAddress" \
          ["./caddyconfig/caddyfile/parse_fuzz.go"]="FuzzParseCaddyfile" \
          ["./listeners_fuzz.go"]="FuzzParseNetworkAddress" \
          ["./replacer_fuzz.go"]="FuzzReplacer" \
        )

        declare -A fuzzers_targets=(\
          ["./caddyconfig/httpcaddyfile/addresses_fuzz.go"]="parse-address" \
          ["./caddyconfig/caddyfile/parse_fuzz.go"]="parse-caddyfile" \
          ["./listeners_fuzz.go"]="parse-network-address" \
          ["./replacer_fuzz.go"]="replacer" \
        )

        fuzz_type="local-regression"
        if [[ ${{ github.event_name }} == "schedule" ]]; then
          fuzz_type="fuzzing"
        fi
        echo "Github event: ${{ github.event_name }}"
        echo "Fuzzing type: $fuzz_type"

        for f in $(find . -name \*_fuzz.go); do
          FUZZER_DIRECTORY=$(dirname $f)
          echo "go-fuzz-build func ${fuzzers_funcs[$f]} residing in $f"
          go-fuzz-build -func "${fuzzers_funcs[$f]}" -libfuzzer -o "$FUZZER_DIRECTORY/${fuzzers_targets[$f]}.a" $FUZZER_DIRECTORY
          echo "Generating fuzzer binary of func ${fuzzers_funcs[$f]} which resides in $f"
          clang-7 -fsanitize=fuzzer "$FUZZER_DIRECTORY/${fuzzers_targets[$f]}.a" -o "$FUZZER_DIRECTORY/${fuzzers_targets[$f]}"
          fuzzit create job caddyserver/${fuzzers_targets[$f]} $FUZZER_DIRECTORY/${fuzzers_targets[$f]} --api-key ${FUZZIT_API_KEY} --type "${fuzz_type}" --branch "${SYSTEM_PULLREQUEST_SOURCEBRANCH}" --revision "${BUILD_SOURCEVERSION}"
          echo "Completed $f"
        done