labeler.yml

name: Label PR

on:
  pull_request:
    types: [ opened, edited, reopened, synchronize ]

permissions:
  issues: write
  pull-requests: write

jobs:
  labeler:
    runs-on: ubuntu-latest
    steps:
      - name: Label PR size
        uses: actions/github-script@v7
        with:
          github-token: ${{secrets.GITHUB_TOKEN}}
          script: |
            const prNumber = context.payload.pull_request.number;
            const { data: prData } = await github.rest.pulls.get({
              owner: context.repo.owner,
              repo: context.repo.repo,
              pull_number: prNumber,
            });
            
            const additions = prData.additions;
            const deletions = prData.deletions;
            const totalChanges = additions + deletions;
            
            let label = "";
            
            if (totalChanges < 10) {
              label = "size:XS";
            } else if (totalChanges < 100) {
              label = "size:S";
            } else if (totalChanges < 300) {
              label = "size:M";
            } else if (totalChanges < 1000) {
              label = "size:L";
            } else {
              label = "size:XL";
            }
            
            // Apply the label
            await github.rest.issues.addLabels({
              owner: context.repo.owner,
              repo: context.repo.repo,
              issue_number: prNumber,
              labels: [label],
            });
            
            console.log(`Total lines of changes: ${totalChanges}`);
            console.log(`Label: ${label}`);