name: Lint

on:
  pull_request:
    branches: [ master ]

jobs:
  lint:
    name: Markdown and Go
    runs-on: ubuntu-latest
    permissions:
      # Required: allow read access to the content for analysis.
      contents: read
    steps:

    - name: Check out code into the Go module directory
      uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2

    - name: Lint markdown
      uses: nosborn/github-action-markdown-cli@508d6cefd8f0cc99eab5d2d4685b1d5f470042c1 # v3.5.0
      with:
        files: '.'
        config_file: ".markdownlint.json"

    - name: Set up Go
      uses: actions/setup-go@4a3601121dd01d1626a1e23e37211e3254c1c06c # v6.4.0
      with:
        go-version-file: go.mod

    - name: Go formatting
      run: |
        if [ -z "$(gofmt -l .)" ]; then
          echo -e "All '*.go' files are properly formatted."
        else
          echo -e "Please run 'make go-lint' to fix. Some files need formatting:"
          gofmt -d -l .
          exit 1
        fi

    - name: Read golangci-lint version
      id: lint-version
      run: |
        version=$(sed -n 's/^GOLANG_CI_LINTER_VERSION=//p' scripts/install-tools.sh)
        echo "version=${version}" >> $GITHUB_OUTPUT
        echo "golangci-lint version: ${version}"

    # https://github.com/golangci/golangci-lint-action?tab=readme-ov-file#verify
    - name: Verify linter configuration and Lint go code
      uses: golangci/golangci-lint-action@1e7e51e771db61008b38414a730f564565cf7c20 # v9.2.0
      with:
        verify: true
        args: --timeout=30m
        version: ${{ steps.lint-version.outputs.version }}

    - name: Run file hygiene checks
      run: ./scripts/file-hygiene.sh

  check-go-version:
    name: Go version consistency
    runs-on: ubuntu-latest
    permissions:
      contents: read
    steps:
    - name: Check out code
      uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2

    - name: Check Go version consistency across cloudbuild.yaml, go.mod and go.tool.mod
      run: ./scripts/go-version-consistency.sh