auto-close-empty-prs.yml

name: Auto Close Empty PRs

on:
  pull_request:
    types:
      - opened

jobs:
  check-and-close:
    runs-on: ubuntu-latest
    permissions:
      pull-requests: write
      issues: write

    steps:
      - name: Check PR for changes
        id: check_changes
        uses: actions/github-script@v7
        with:
          script: |
            const { data: files } = await github.rest.pulls.listFiles({
              owner: context.repo.owner,
              repo: context.repo.repo,
              pull_number: context.issue.number
            });

            // Check if there are any files changed
            const hasChanges = files.length > 0;

            // Also check if all changes are 0 (sometimes PRs show files but with 0 changes)
            const hasActualChanges = files.some(file =>
              file.additions > 0 || file.deletions > 0 || file.changes > 0
            );

            console.log(`Files changed: ${files.length}`);
            console.log(`Has actual changes: ${hasActualChanges}`);

            return { hasChanges: hasChanges && hasActualChanges };

      - name: Close PR if empty
        if: steps.check_changes.outputs.result == 'false' || fromJSON(steps.check_changes.outputs.result).hasChanges == false
        uses: actions/github-script@v7
        with:
          script: |
            // Add a comment explaining why the PR is being closed
            await github.rest.issues.createComment({
              owner: context.repo.owner,
              repo: context.repo.repo,
              issue_number: context.issue.number,
              body: '⚠️ This pull request appears to contain no changes and will be automatically closed.\n\nIf you believe this is an error, please add your changes and push them to the branch.'
            });

            // Close the pull request
            await github.rest.pulls.update({
              owner: context.repo.owner,
              repo: context.repo.repo,
              pull_number: context.issue.number,
              state: 'closed'
            });

            // Add a label (optional)
            await github.rest.issues.addLabels({
              owner: context.repo.owner,
              repo: context.repo.repo,
              issue_number: context.issue.number,
              labels: ['auto-closed', 'no-changes']
            });