.github/workflows/rust.yml

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name: Rust

on:
  # always trigger
  push:
  pull_request:

jobs:

  # build the library, a compilation step used by multiple steps below
  linux-build-lib:
    name: Build Libraries on AMD64 Rust ${{ matrix.rust }}
    runs-on: ubuntu-latest
    strategy:
      matrix:
        arch: [amd64]
        rust: [stable]
    container:
      image: ${{ matrix.arch }}/rust
      env:
        # Disable full debug symbol generation to speed up CI build and keep memory down
        # "1" means line tables only, which is useful for panic tracebacks.
        RUSTFLAGS: "-C debuginfo=1"
    steps:
      - uses: actions/checkout@v2
      - name: Cache Cargo
        uses: actions/cache@v2
        with:
          # these represent dependencies downloaded by cargo
          # and thus do not depend on the OS, arch nor rust version.
          path: /github/home/.cargo
          key: cargo-cache-
      - name: Cache Rust dependencies
        uses: actions/cache@v2
        with:
          # these represent compiled steps of both dependencies and arrow
          # and thus are specific for a particular OS, arch and rust version.
          path: /github/home/target
          key: ${{ runner.os }}-${{ matrix.arch }}-target-cache-${{ matrix.rust }}-
      - name: Setup Rust toolchain
        run: |
          rustup toolchain install ${{ matrix.rust }}
          rustup default ${{ matrix.rust }}
          rustup component add rustfmt
      - name: Build Workspace
        run: |
          export CARGO_HOME="/github/home/.cargo"
          export CARGO_TARGET_DIR="/github/home/target"
          cargo build

  # test the crate
  linux-test:
    name: Test Workspace on AMD64 Rust ${{ matrix.rust }}
    needs: [linux-build-lib]
    runs-on: ubuntu-latest
    strategy:
      matrix:
        arch: [amd64]
        rust: [stable]
    container:
      image: ${{ matrix.arch }}/rust
      env:
        # Disable full debug symbol generation to speed up CI build and keep memory down
        # "1" means line tables only, which is useful for panic tracebacks.
        RUSTFLAGS: "-C debuginfo=1"
        ARROW_TEST_DATA: /__w/arrow-rs/arrow-rs/testing/data
        PARQUET_TEST_DATA: /__w/arrow-rs/arrow-rs/parquet-testing/data
    steps:
      - uses: actions/checkout@v2
        with:
          submodules: true
      - name: Cache Cargo
        uses: actions/cache@v2
        with:
          path: /github/home/.cargo
          # this key equals the ones on `linux-build-lib` for re-use
          key: cargo-cache-
      - name: Cache Rust dependencies
        uses: actions/cache@v2
        with:
          path: /github/home/target
          # this key equals the ones on `linux-build-lib` for re-use
          key: ${{ runner.os }}-${{ matrix.arch }}-target-cache-${{ matrix.rust }}
      - name: Setup Rust toolchain
        run: |
          rustup toolchain install ${{ matrix.rust }}
          rustup default ${{ matrix.rust }}
          rustup component add rustfmt
      - name: Run tests
        run: |
          export CARGO_HOME="/github/home/.cargo"
          export CARGO_TARGET_DIR="/github/home/target"
          # run tests on all workspace members with default feature list
          cargo test

  windows-and-macos:
    name: Test on ${{ matrix.os }} Rust ${{ matrix.rust }}
    runs-on: ${{ matrix.os }}
    strategy:
      matrix:
        os: [windows-latest, macos-latest]
        rust: [stable]
    steps:
      - uses: actions/checkout@v2
        with:
          submodules: true
      # TODO: this won't cache anything, which is expensive. Setup this action
      # with a OS-dependent path.
      - name: Setup Rust toolchain
        run: |
          rustup toolchain install ${{ matrix.rust }}
          rustup default ${{ matrix.rust }}
          rustup component add rustfmt
      - name: Run tests
        shell: bash
        run: |
          export ARROW_TEST_DATA=$(pwd)/testing/data
          export PARQUET_TEST_DATA=$(pwd)/parquet-testing/data
          # do not produce debug symbols to keep memory usage down
          export RUSTFLAGS="-C debuginfo=0"
          cargo test

  clippy:
    name: Clippy
    needs: [linux-build-lib]
    runs-on: ubuntu-latest
    strategy:
      matrix:
        arch: [amd64]
        rust: [stable]
    container:
      image: ${{ matrix.arch }}/rust
      env:
        # Disable full debug symbol generation to speed up CI build and keep memory down
        # "1" means line tables only, which is useful for panic tracebacks.
        RUSTFLAGS: "-C debuginfo=1"
    steps:
      - uses: actions/checkout@v2
        with:
          submodules: true
      - name: Cache Cargo
        uses: actions/cache@v2
        with:
          path: /github/home/.cargo
          # this key equals the ones on `linux-build-lib` for re-use
          key: cargo-cache-
      - name: Cache Rust dependencies
        uses: actions/cache@v2
        with:
          path: /github/home/target
          # this key equals the ones on `linux-build-lib` for re-use
          key: ${{ runner.os }}-${{ matrix.arch }}-target-cache-${{ matrix.rust }}
      - name: Setup Rust toolchain
        run: |
          rustup toolchain install ${{ matrix.rust }}
          rustup default ${{ matrix.rust }}
          rustup component add rustfmt clippy
      - name: Run clippy
        run: |
          export CARGO_HOME="/github/home/.cargo"
          export CARGO_TARGET_DIR="/github/home/target"
          cargo clippy --all-targets --workspace -- -D warnings -A clippy::redundant_field_names

  lint:
    name: Lint
    runs-on: ubuntu-latest
    container:
      image: amd64/rust
    steps:
      - uses: actions/checkout@v2
      - name: Setup toolchain
        run: |
          rustup toolchain install stable
          rustup default stable
          rustup component add rustfmt
      - name: Run
        run: cargo fmt --all -- --check
  coverage:
    name: Coverage
    runs-on: ubuntu-latest
    strategy:
      matrix:
        arch: [amd64]
        rust: [stable]
    steps:
      - uses: actions/checkout@v2
        with:
          submodules: true
      - name: Cache Cargo
        uses: actions/cache@v2
        with:
          path: /home/runner/.cargo
          # this key is not equal because the user is different than on a container (runner vs github)
          key: cargo-coverage-cache-
      - name: Cache Rust dependencies
        uses: actions/cache@v2
        with:
          path: /home/runner/target
          # this key is not equal because coverage uses different compilation flags.
          key: ${{ runner.os }}-${{ matrix.arch }}-target-coverage-cache-${{ matrix.rust }}-
      - name: Run coverage
        run: |
          export CARGO_HOME="/home/runner/.cargo"
          export CARGO_TARGET_DIR="/home/runner/target"

          export ARROW_TEST_DATA=$(pwd)/testing/data
          export PARQUET_TEST_DATA=$(pwd)/parquet-testing/data

          # 2020-11-15: There is a cargo-tarpaulin regression in 0.17.0
          # see https://github.com/xd009642/tarpaulin/issues/618
          cargo install --version 0.16.0 cargo-tarpaulin
          cargo tarpaulin --out Xml
      - name: Report coverage
        continue-on-error: true
        run: bash <(curl -s https://codecov.io/bash)