name: ci

on: [push, pull_request]

jobs:
  build:
    name: ${{ matrix.config.variant }} ${{ matrix.config.target }}
    if: |
      github.event_name == 'push' ||
      !startsWith(github.event.pull_request.head.label, 'denoland:')
    runs-on: ${{ matrix.config.os }}
    timeout-minutes: 120
    strategy:
      # Always run master branch builds to completion. This allows the cache to
      # stay mostly up-to-date in situations where a single job fails due to
      # e.g. a flaky test.
      # Don't fast-fail on tag build because publishing binaries shouldn't be
      # prevented if 'cargo publish' fails (which can be a false negative).
      fail-fast:
        ${{ github.event_name == 'pull_request' || (github.ref !=
        'refs/heads/master' && !startsWith(github.ref, 'refs/tags/')) }}
      matrix:
        config:
          - os: macOS-latest
            target: x86_64-apple-darwin
            variant: debug

          - os: macOS-latest
            target: x86_64-apple-darwin
            variant: release

          - os: ubuntu-latest-xl
            target: x86_64-unknown-linux-gnu
            variant: debug

          - os: ubuntu-latest-xl
            target: x86_64-unknown-linux-gnu
            variant: release

          - os: windows-2019
            target: x86_64-pc-windows-msvc
            variant: release # Note: we do not support windows debug builds.

          # Disabled because an apparent sscache bug causes it to crash with the
          # following error:
          #   [rusty_v8 0.15.0] sccache: error : Invalid checksum
          #   [rusty_v8 0.15.0] sccache: error : corrupt deflate stream
          #
          # - os: ubuntu-latest-xl
          #   target: aarch64-unknown-linux-gnu
          #   variant: debug
          #
          # - os: ubuntu-latest-xl
          #   target: aarch64-unknown-linux-gnu
          #   variant: release

    env:
      V8_FROM_SOURCE: true
      CARGO_VARIANT_FLAG: ${{ matrix.config.variant == 'release' && '--release' || '' }}
      LIB_NAME: ${{ contains(matrix.config.target, 'windows') && 'rusty_v8' || 'librusty_v8' }}
      LIB_EXT: ${{ contains(matrix.config.target, 'windows') && 'lib' || 'a' }}

    steps:
      - name: Configure git
        run: git config --global core.symlinks true

      - name: Clone repository
        uses: actions/checkout@v1
        with:
          fetch-depth: 10
          submodules: recursive

      - name: Install rust
        uses: hecrj/setup-rust-action@v1
        with:
          components: clippy, rustfmt
          rust-version: 1.48.0

      - name: Install python
        uses: actions/setup-python@v1
        with:
          python-version: 2.7.x
          architecture: x64

      - name: Install cross compilation toolchain
        if: matrix.config.target == 'aarch64-unknown-linux-gnu'
        run: |
          rustup target add aarch64-unknown-linux-gnu

          sudo apt update
          sudo apt install -yq --no-install-suggests --no-install-recommends \
            binfmt-support g++-5-aarch64-linux-gnu g++-5-multilib \
            gcc-5-aarch64-linux-gnu libc6-arm64-cross qemu qemu-user \
            qemu-user-binfmt

          sudo ln -s /usr/aarch64-linux-gnu/lib/ld-linux-aarch64.so.1 \
                     /lib/ld-linux-aarch64.so.1

          echo "CARGO_TARGET_AARCH64_UNKNOWN_LINUX_GNU_LINKER=/usr/bin/aarch64-linux-gnu-gcc-5" >> ${GITHUB_ENV}
          echo "QEMU_LD_PREFIX=/usr/aarch64-linux-gnu" >> ${GITHUB_ENV}

      - name: Cache
        uses: actions/cache@v2
        with:
          # Note: rusty_v8 targets always get get rebuilt, and their outputs
          # ('librusty_v8.rlib', the whole 'gn_out' directory, etc.) can be
          # quite big, so we cache only those subdirectories of
          # target/{debug|release} that contain the build output for crates that
          # come from the registry. By additionally saving the sccache cache
          # directory it's still possible to build v8 fast.
          path: |-
            target/sccache
            target/*/.*
            target/*/build
            target/*/deps
          key:
            ${{ matrix.config.target }}-${{ matrix.config.variant }}-${{
            hashFiles('./Cargo.lock', './v8/include/v8-version.h') }}
          restore-keys:
            ${{ matrix.config.target }}-${{ matrix.config.variant }}-


        # It seems that the 'target' directory does not always get restored
        # from cache correctly on MacOS. In the build log we see the following:
        #
        #   Fresh serde_derive v1.0.115
        #
        # But a little while after that Cargo aborts because 'serde_derive' is
        # now nowhere to be found. We're not the only ones experiencing this,
        # see https://github.com/actions-rs/cargo/issues/111.
        #
        #   error[E0463]: can't find crate for `serde_derive`
        #   ##[error]   --> /Users/runner/.cargo/registry/src/github.com-
        #       |           1ecc6299db9ec823/serde-1.0.115/src/lib.rs:285:1
        #       |
        #   285 | extern crate serde_derive;
        #       | ^^^^^^^^^^^^^^^^^^^^^^^^^^ can't find crate
      - name: Work around MacOS + Cargo + Github Actions cache bug
        if: runner.os == 'macOS'
        run: cargo clean -p serde_derive

      - name: Install and start sccache
        shell: pwsh
        env:
          SCCACHE_DIR: ${{ github.workspace }}/target/sccache
          SCCACHE_CACHE_SIZE: 128M
          SCCACHE_IDLE_TIMEOUT: 0
        run: |
          $version = "0.2.12"
          $platform =
            @{ "macOS"   = "x86_64-apple-darwin"
               "Linux"   = "x86_64-unknown-linux-musl"
               "Windows" = "x86_64-pc-windows-msvc"
             }.${{ runner.os }}
          $basename = "sccache-$version-$platform"
          $url = "https://github.com/mozilla/sccache/releases/download/" +
                 "$version/$basename.tar.gz"
          cd ~
          curl -LO $url
          tar -xzvf "$basename.tar.gz"
          . $basename/sccache --start-server
          echo "$(pwd)/$basename" | Out-File -FilePath $env:GITHUB_PATH -Encoding utf8 -Append


      - name: Test
        run:
          cargo test -vv --all-targets --locked ${{ env.CARGO_VARIANT_FLAG }}
          --target ${{ matrix.config.target }}

      - name: Clippy
        run:
          cargo clippy --all-targets --locked ${{ env.CARGO_VARIANT_FLAG }}
          --target ${{ matrix.config.target }} -- -D clippy::all

      - name: Rustfmt
        run: cargo fmt -- --check

      - name: Prepare binary publish
        run: cp
          target/${{ matrix.config.target }}/${{ matrix.config.variant }}/gn_out/obj/${{ env.LIB_NAME }}.${{ env.LIB_EXT }}
          target/${{ env.LIB_NAME }}_${{ matrix.config.variant }}_${{ matrix.config.target }}.${{ env.LIB_EXT }}

      - name: Binary publish
        uses: softprops/action-gh-release@v1
        if: >-
          github.repository == 'denoland/rusty_v8' &&
          startsWith(github.ref, 'refs/tags/')
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        with:
          files: target/${{ env.LIB_NAME }}_${{ matrix.config.variant }}_${{ matrix.config.target }}.${{ env.LIB_EXT }}

      # TODO: add clang-format and maybe cpplint.

      # TODO(ry) It would be ideal to check that "cargo package" also runs and
      # that the resulting package is less than 10 MB. However it seems to
      # result in a complete V8 rebuild. For now just be careful not to manually
      # check that "cargo package" is working when updating the build.
      # - name: Package
      #   run: cargo package -vv --locked

      - name: Publish
        # Only publish on x64 linux when there's a git tag:
        if: >-
          startsWith(github.ref, 'refs/tags/') &&
          github.repository == 'denoland/rusty_v8' &&
          startsWith(matrix.config.target , 'x86_64') &&
          matrix.config.variant == 'debug' &&
          runner.os == 'Linux'
        env:
          CARGO_REGISTRY_TOKEN: ${{ secrets.CARGO_REGISTRY_TOKEN }}
        run: cargo publish -vv

      - name: Stop sccache
        if: always()
        run: sccache --stop-server