pr-size-labeler.yml

name: PR Size Labeler - Calculate

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

permissions:
    contents: read

jobs:
    calculate-pr-size:
        name: Calculate PR Size
        runs-on: ubuntu-latest
        steps:
            - name: Get PR details
              id: pr
              uses: actions/github-script@ed597411d8f924073f98dfc5c65a23a2325f34cd # v8
              with:
                  script: |
                      const pr = await github.rest.pulls.get({
                        owner: context.repo.owner,
                        repo: context.repo.repo,
                        pull_number: context.issue.number
                      });

                      const additions = pr.data.additions;
                      const deletions = pr.data.deletions;
                      const totalChanges = additions + deletions;

                      console.log(`PR #${context.issue.number}: +${additions} -${deletions} (${totalChanges} total)`);

                      return {
                        additions: additions,
                        deletions: deletions,
                        total: totalChanges
                      };

            - name: Determine size label
              id: size
              uses: actions/github-script@ed597411d8f924073f98dfc5c65a23a2325f34cd # v8
              with:
                  script: |
                      const changes = ${{ steps.pr.outputs.result }};
                      const total = changes.total;

                      let sizeLabel = '';

                      if (total < 100) {
                        sizeLabel = 'size/XS';
                      } else if (total < 300) {
                        sizeLabel = 'size/S';
                      } else if (total < 600) {
                        sizeLabel = 'size/M';
                      } else if (total < 1000) {
                        sizeLabel = 'size/L';
                      } else {
                        sizeLabel = 'size/XL';
                      }

                      console.log(`PR size: ${total} lines -> ${sizeLabel}`);
                      return sizeLabel;

            - name: Save size label to artifact
              run: |
                  mkdir -p pr-size
                  echo "${{ steps.size.outputs.result }}" > pr-size/label.txt
                  echo "${{ github.event.pull_request.number }}" > pr-size/pr-number.txt

            - name: Upload artifact
              uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7
              with:
                  name: pr-size-label
                  path: pr-size/
                  retention-days: 1