name: Lint the docs!
on:
  pull_request:
    branches: [ "main" ]

permissions:
  pull-requests: write
  contents: read

jobs:
  lint-docs:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v3

      - name: Set up Node.js
        uses: actions/setup-node@v3
        with:
          node-version: 16.13.2
          cache: npm

      - name: Install docs-lint
        run: npm install -g @elastic/docs-lint

      - name: Install strip-ansi
        run: npm install strip-ansi
        
      - name: Run docs-lint
        id: run_docs_lint
        run: |
          LINT=$(((docs-lint $GITHUB_WORKSPACE/docs --asciidoc) 2>&1) || true)
          echo "$LINT"
          LINT="${LINT//'%'/'%25'}"
          LINT="${LINT//$'\n'/'%0A'}"
          LINT="${LINT//$'\r'/'%0D'}"
          LINT="${LINT//$'`'/'\`'}"
          echo "::set-output name=LINT_RESULT::$LINT"

      - name: Add PR comment
        uses: actions/github-script@v6
        with:
          github-token: ${{ secrets.GITHUB_TOKEN }}
          script: |
            const report = `${{ steps.run_docs_lint.outputs.LINT_RESULT }}`
            if (report !== '') {
              const { default: stripAnsi } = await import('/home/runner/work/docs-lint/docs-lint/node_modules/strip-ansi/index.js')
              const cleanText = stripAnsi(report)
              const errorWithContext = `**⚠️ Lint failed**\n~~~\n${cleanText}\n~~~`
              github.rest.issues.createComment({
                issue_number: context.issue.number,
                owner: context.repo.owner,
                repo: context.repo.repo,
                body: errorWithContext
              })
            } else {
              console.log("🎉 No errors!")
            }

      - name: Throw error if linter fails
        uses: actions/github-script@v6
        with:
          script: |
            const report = `${{ steps.run_docs_lint.outputs.LINT_RESULT }}`
            if (report !== '') {
              core.setFailed(report)
            } else {
              console.log("No errors!")
            }