name: CI

on:
  push:
  pull_request:

defaults:
  run:
    # PowerShell's behavior for -flag=value is undesirable, so run all commands with bash.
    shell: bash

jobs:

  test:
    name: Run tests
    strategy:
      matrix:
        os: [ubuntu, macos, windows]
        go-version: [1.19.x]
        include:
          # Test old supported Go version
          - os: ubuntu
            go-version: 1.18.x
    env:
      ELVISH_TEST_TIME_SCALE: 20
    runs-on: ${{ matrix.os }}-latest
    steps:
    # autocrlf is problematic for fuzz testdata.
    - name: Turn off autocrlf
      if: matrix.os == 'windows'
      run: git config --global core.autocrlf false
    - name: Checkout code
      uses: actions/checkout@v3
    - name: Set up cache
      uses: actions/cache@v3
      with:
        path: |
          ~/go/pkg/mod
          ~/.cache/go-build
          ~/Library/Caches/go-build
          ~/AppData/Local/go-build
        key: test/${{ matrix.os }}/${{ matrix.go-version }}/${{ hashFiles('go.sum') }}/${{ github.sha }}
        restore-keys: test/${{ matrix.os }}/${{ matrix.go-version }}/${{ hashFiles('go.sum') }}/
    - name: Set up Go
      uses: actions/setup-go@v3
      with:
        go-version: ${{ matrix.go-version }}
    - name: Test with race detection
      run: |
        go test -race ./...
        cd website; go test -race ./...
    - name: Set ostype to ${{ matrix.os }}
      run: echo ostype=${{ matrix.os }} >> $GITHUB_ENV
    - name: Set ostype to linux
      if: matrix.os == 'ubuntu'
      run: echo ostype=linux >> $GITHUB_ENV
    - name: Generate test coverage
      if: matrix.go-version == '1.19.x'
      run: go test -coverprofile=cover -coverpkg=./pkg/... ./pkg/...
    - name: Save test coverage
      if: matrix.go-version == '1.19.x'
      uses: actions/upload-artifact@v3
      with:
        name: cover-${{ env.ostype }}
        path: cover

  # The purpose of running benchmarks in GitHub Actions is primarily to ensure
  # that the benchmark code runs and doesn't crash. GitHub Action runners don't
  # have a stable enough environment to produce reliable benchmark numbers.
  benchmark:
    name: Run benchmarks
    runs-on: ubuntu-latest
    steps:
    - name: Checkout code
      uses: actions/checkout@v3
    - name: Set up Go
      uses: actions/setup-go@v3
      with:
        go-version: 1.19.x
    - name: Run benchmarks
      run: go test -bench=. -run='^$' ./...

  upload-coverage:
    name: Upload test coverage
    strategy:
      matrix:
        ostype: [linux, macos, windows]
    needs: test
    runs-on: ubuntu-latest
    steps:
    - name: Checkout code
      uses: actions/checkout@v3
    - name: Download test coverage
      uses: actions/download-artifact@v3
      with:
        name: cover-${{ matrix.ostype }}
    - name: Upload coverage to codecov
      uses: codecov/codecov-action@v3
      with:
        files: ./cover
        flags: ${{ matrix.ostype }}

  checks:
    name: Run checks
    runs-on: ubuntu-latest
    steps:
    - name: Checkout code
      uses: actions/checkout@v3
    - name: Set up Go
      uses: actions/setup-go@v3
      with:
        go-version: 1.19.x
    - name: Set up Python
      uses: actions/setup-python@v4
      with:
        python-version: '3.x'
    - name: Install tools
      run: |
        go install golang.org/x/tools/cmd/stringer@latest
        go install golang.org/x/tools/cmd/goimports@latest
        go install honnef.co/go/tools/cmd/staticcheck@v0.4.2
        pip install --user codespell==2.2.1
    - name: Run checks
      run: make all-checks

  check-rellinks:
    name: Check relative links in website
    runs-on: ubuntu-latest
    steps:
    - name: Checkout code
      uses: actions/checkout@v3
    - name: Set up Go
      uses: actions/setup-go@v3
      with:
        go-version: 1.19.x
    - name: Set up Python
      uses: actions/setup-python@v4
      with:
        python-version: '3.x'
    - name: Install Python dependency
      run: pip3 install beautifulsoup4
    - name: Check relative links
      run: make -C website check-rellinks

  lsif:
    name: Upload SourceGraph LSIF
    if: github.repository == 'elves/elvish' && github.event_name == 'push'
    runs-on: ubuntu-latest
    container: sourcegraph/lsif-go:latest
    steps:
    - name: Checkout code
      uses: actions/checkout@v3
    - name: Generate LSIF data
      run: lsif-go
    - name: Upload LSIF data
      run: src lsif upload -github-token=${{ secrets.GITHUB_TOKEN }} -ignore-upload-failure
