name: Continuous Integration Checks

on: [push, pull_request]

jobs:
  build:
    strategy:
      matrix:
        platform: [ ubuntu-latest ]
        toolchain: [ stable,
                     beta,
                     # 1.30.0 is MSRV for Rust-Lightning
                     1.30.0,
                     # 1.34.2 is Debian stable
                     1.34.2,
                     # 1.39.0 is MSRV for lightning-net-tokio and generates coverage
                     1.39.0]
        include:
          - toolchain: stable
            build-net-tokio: true
          - toolchain: stable
            platform: macos-latest
            build-net-tokio: true
          - toolchain: stable
            platform: windows-latest
            build-net-tokio: true
          - toolchain: beta
            build-net-tokio: true
          - toolchain: 1.39.0
            build-net-tokio: true
            coverage: true
    runs-on: ${{ matrix.platform }}
    steps:
      - name: Checkout source code
        uses: actions/checkout@v2
      - name: Install Rust ${{ matrix.toolchain }} toolchain
        uses: actions-rs/toolchain@v1
        with:
          toolchain: ${{ matrix.toolchain }}
          override: true
          profile: minimal
      - name: Build on Rust ${{ matrix.toolchain }} with net-tokio
        if: "matrix.build-net-tokio && !matrix.coverage"
        run: cargo build --verbose --color always
      - name: Build on Rust ${{ matrix.toolchain }} with net-tokio and full code-linking for coverage generation
        if: matrix.coverage
        run: RUSTFLAGS="-C link-dead-code" cargo build --verbose --color always
      - name: Build on Rust ${{ matrix.toolchain }}
        if: "! matrix.build-net-tokio"
        run: cargo build --verbose  --color always -p lightning
      - name: Test on Rust ${{ matrix.toolchain }} with net-tokio
        if: "matrix.build-net-tokio && !matrix.coverage"
        run: cargo test --verbose --color always
      - name: Test on Rust ${{ matrix.toolchain }} with net-tokio and full code-linking for coverage generation
        if: matrix.coverage
        run: RUSTFLAGS="-C link-dead-code" cargo test --verbose --color always
      - name: Test on Rust ${{ matrix.toolchain }}
        if: "! matrix.build-net-tokio"
        run: cargo test --verbose --color always  -p lightning
      - name: Install deps for kcov
        if: matrix.coverage
        run: |
          sudo apt-get update
          sudo apt-get -y install binutils-dev libcurl4-openssl-dev zlib1g-dev libdw-dev libiberty-dev
      - name: Install kcov
        if: matrix.coverage
        run: |
          wget https://github.com/SimonKagstrom/kcov/archive/master.tar.gz
          tar xzf master.tar.gz
          cd kcov-master && mkdir build && cd build
          cmake ..
          make
          make install DESTDIR=../../kcov-build
          cd ../.. && rm -rf kcov-master master.tar.gz
      - name: Generate coverage report
        if: matrix.coverage
        run: |
          for file in target/debug/lightning-*; do
            [ -x "${file}" ] || continue;
            mkdir -p "target/cov/$(basename $file)";
            ./kcov-build/usr/local/bin/kcov --exclude-pattern=/.cargo,/usr/lib --verify "target/cov/$(basename $file)" "$file";
          done
      - name: Upload coverage
        if: matrix.coverage
        uses: codecov/codecov-action@v1
        with:
          # Could you use this to fake the coverage report for your PR? Sure.
          # Will anyone be impressed by your amazing coverage? No
          # Maybe if codecov wasn't broken we wouldn't need to do this...
          token: f421b687-4dc2-4387-ac3d-dc3b2528af57
          fail_ci_if_error: true

  check_commits:
    runs-on: ubuntu-latest
    env:
      TOOLCHAIN: stable
    steps:
      - name: Checkout source code
        uses: actions/checkout@v2
        with:
          fetch-depth: 0
      - name: Install Rust ${{ env.TOOLCHAIN }} toolchain
        uses: actions-rs/toolchain@v1
        with:
          toolchain: ${{ env.TOOLCHAIN }}
          override: true
          profile: minimal
      - name: Fetch full tree and rebase on upstream
        run: |
          git remote add upstream https://github.com/rust-bitcoin/rust-lightning
          git fetch upstream
          export GIT_COMMITTER_EMAIL="rl-ci@example.com"
          export GIT_COMMITTER_NAME="RL CI"
          git rebase upstream/main
      - name: For each commit, run cargo check (including in fuzz)
        run: ci/check-each-commit.sh upstream/main

  fuzz:
    runs-on: ubuntu-latest
    env:
      TOOLCHAIN: stable
    steps:
      - name: Checkout source code
        uses: actions/checkout@v2
      - name: Install Rust ${{ env.TOOLCHAIN }} toolchain
        uses: actions-rs/toolchain@v1
        with:
          toolchain: ${{ env.TOOLCHAIN }}
          override: true
          profile: minimal
      - name: Install dependencies for honggfuzz
        run: |
          sudo apt-get update
          sudo apt-get -y install build-essential binutils-dev libunwind-dev
      - name: Sanity check fuzz targets on Rust ${{ env.TOOLCHAIN }}
        run: cd fuzz && cargo test --verbose --color always
      - name: Run fuzzers
        run: cd fuzz && ./ci-fuzz.sh

  check_bindings:
    runs-on: ubuntu-latest
    # Ubuntu's version of rustc uses its own LLVM instead of being a real native package.
    # This leaves us with an incompatible LLVM version when linking. Instead, use a real OS.
    # We further (temporarily) use Debian experimental since testing links rustc against the
    # brand-new llvm-10, but clang/llvm still default to LLVM 9.
    container: debian:experimental
    env:
      TOOLCHAIN: stable
    steps:
      - name: Install native Rust toolchain, Valgrind, and build utilitis
        run: |
          echo 'Package: llvm llvm-runtime clang lld' > /etc/apt/preferences.d/99-llvm10
          echo 'Pin: release n=experimental' >> /etc/apt/preferences.d/99-llvm10
          echo 'Pin-Priority: 995' >> /etc/apt/preferences.d/99-llvm10
          apt-get update
          apt-get -y dist-upgrade
          apt-get -y install cargo valgrind lld git g++ clang
      - name: Checkout source code
        uses: actions/checkout@v2
      - name: Sanity test bindings
        working-directory: lightning-c-bindings
        run: cargo check
      - name: Install cbindgen
        run: cargo install --force cbindgen
      - name: Rebuild bindings, and check the sample app builds + links
        run: ./genbindings.sh
      - name: Check that the latest bindings are in git
        run: |
          if [ "$(git diff)" != "" ]; then
            # cbindgen's bindings output order can be FS-dependant, so check that the lines are all the same:
            mv lightning-c-bindings/include/lightning.h lightning-c-bindings/include/lightning.h.new
            git checkout lightning-c-bindings/include/lightning.h
            cat lightning-c-bindings/include/lightning.h | grep -v "Generated with cbindgen:[0-9\.]*" | sort > lightning-c-bindings/include/lightning.h.sorted
            cat lightning-c-bindings/include/lightning.h.new | grep -v "Generated with cbindgen:[0-9\.]*" | sort > lightning-c-bindings/include/lightning.h.new.sorted
            diff lightning-c-bindings/include/lightning.h.sorted lightning-c-bindings/include/lightning.h.new.sorted
            [ "$(diff lightning-c-bindings/include/lightning.h.sorted lightning-c-bindings/include/lightning.h.new.sorted)" != "" ] && exit 2
            git diff --exit-code
          fi

  linting:
    runs-on: ubuntu-latest
    env:
      TOOLCHAIN: 1.39.0
    steps:
      - name: Checkout source code
        uses: actions/checkout@v2
      - name: Install Rust ${{ env.TOOLCHAIN }} toolchain
        uses: actions-rs/toolchain@v1
        with:
          toolchain: ${{ env.TOOLCHAIN }}
          override: true
          profile: minimal
      - name: Install clippy
        run: |
          rustup component add clippy
      - name: Run default clippy linting
        run: |
          cargo clippy -- -Aclippy::erasing_op -Aclippy::never_loop -Aclippy::if_same_then_else