name: CI

on:
  push:
    branches: [ master ]
  pull_request:
    branches: [ master ]

jobs:
  check:
    name: Check
    runs-on: ubuntu-latest
    strategy:
      fail-fast: false
      matrix:
        rust:
          - stable
          - beta
          - nightly
          - 1.18.0  # MSRV

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

      - uses: actions-rs/toolchain@v1
        with:
          profile: minimal
          toolchain: ${{ matrix.rust }}
          override: true
        name: Install Rust ${{ matrix.rust }}

      - uses: actions-rs/cargo@v1
        with:
          command: check
        name: Run `cargo check`
      
      - uses: actions-rs/cargo@v1
        with:
          command: check
          args: --examples
        name: Check examples
        if: matrix.rust != '1.18.0'

  test:
    name: Test
    runs-on: ubuntu-latest
    strategy:
      matrix:
        rust:
          - stable
          - beta
          - nightly
    steps:
      - uses: actions/checkout@v2
        name: Checkout

      - uses: actions-rs/toolchain@v1
        with:
          profile: minimal
          toolchain: ${{ matrix.rust }}
          override: true
        name: Install Rust ${{ matrix.rust }}

      - uses: actions-rs/cargo@v1
        with:
          command: test
        name: Run `cargo test`

  lints:
    name: Lints
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v2
        name: Checkout

      - uses: actions-rs/toolchain@v1
        with:
          profile: minimal
          toolchain: stable
          override: true
          components: rustfmt, clippy
        name: Install Rust stable

      - uses: actions-rs/cargo@v1
        with:
          command: fmt
          args: --all -- --check
        name: Run `cargo fmt`

      - uses: actions-rs/cargo@v1
        with:
          command: clippy
          args: -- -D warnings
        name: Run `cargo clippy`

  coverage:
    name: Code Coverage
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v2
        name: Checkout
      
      - uses: actions-rs/toolchain@v1
        with:
          profile: minimal
          toolchain: nightly
          override: true
        name: Install Rust nightly
      
      - name: Run cargo-tarpaulin
        uses: actions-rs/tarpaulin@v0.1
        with:
          version: '0.12.3'
          args: '--ignore-tests -- --test-threads 1'

      - name: Upload to codecov.io
        uses: codecov/codecov-action@v1

      - name: Archive code coverage results
        uses: actions/upload-artifact@v1
        with:
          name: code-coverage-report
          path: cobertura.xml