lintdiff-code.yaml

name: "Swagger LintDiff - Analyze Code"

on:
  pull_request:
    types:
      # default
      - opened
      - synchronize
      - reopened
      # re-run if base branch is changed, since previous merge commit may generate incorrect diff
      - edited

permissions:
  contents: read

jobs:
  lintdiff:
    name: "Swagger LintDiff - Analyze Code"
    runs-on: ubuntu-24.04

    steps:
      - name: Checkout eng
        uses: actions/checkout@v6
        with:
          sparse-checkout: |
            eng/
            .github/

      - name: Checkout 'after' state
        uses: actions/checkout@v6
        with:
          fetch-depth: 2
          path: after

      - name: Checkout 'before' state
        uses: actions/checkout@v6
        with:
          ref: ${{ github.event.pull_request.base.sha }}
          path: before

      - name: Setup Node and install deps
        uses: ./.github/actions/setup-node-install-deps

      - name: Get changed files
        uses: actions/github-script@v8
        with:
          script: |
            const { getChangedFiles } = await import('${{ github.workspace }}/.github/shared/src/changed-files.js');
            const { writeFileSync } = await import('fs');
            const { join } = await import('path');

            // TODO: Logger
            const changedFiles = await getChangedFiles({ cwd: 'after', paths: ['specification'] });
            console.log('Changed files:', changedFiles);

            const filePath = join(process.cwd(), 'changed-files.txt');
            writeFileSync(filePath, changedFiles.join('\n'), 'utf8');
            console.log(`Changed files written to ${filePath}`);

      # TODO: Could be github.sha for merge commit
      - name: Run LintDiff
        id: run-lintdiff
        run: |
          set -x

          echo "summary=$GITHUB_STEP_SUMMARY" >> "$GITHUB_OUTPUT"

          npm exec --no -- lint-diff \
            --before before \
            --after after \
            --changed-files-path changed-files.txt \
            --base-branch ${{ github.event.pull_request.base.ref }} \
            --compare-sha ${{ github.event.pull_request.head.sha }} \
            --out-file "$GITHUB_STEP_SUMMARY"
        env:
          # Some LintDiff runs are memory intensive and require more than the
          # default.
          NODE_OPTIONS: "--max-old-space-size=16384"

      # Used by other workflows like set-status
      - name: Set job-summary artifact
        if: ${{ always() && steps.run-lintdiff.outputs.summary }}
        uses: actions/upload-artifact@v7
        with:
          name: job-summary
          path: ${{ steps.run-lintdiff.outputs.summary }}
          # If the file doesn't exist, just don't add the artifact
          if-no-files-found: ignore