size.yaml

name: Pull request size
on: pull_request_target

jobs:
  size-label:
    name: Size label
    permissions:
      contents: read
      pull-requests: write
    runs-on: ubuntu-latest
    steps:
      - name: Calculate size
        run: |
          #!/usr/bin/bash
          set -euo pipefail

          additions=$(curl -s "https://api.github.com/repos/${{ github.repository }}/pulls/${{ github.event.pull_request.number }}" | jq '.additions')
          deletions=$(curl -s "https://api.github.com/repos/${{ github.repository }}/pulls/${{ github.event.pull_request.number }}" | jq '.deletions')
          size=$((additions + deletions))

          sizelabel=XS
          if [ ${size} -gt 600 ]; then
            sizelabel="XXL"
          elif [ ${size} -gt 240 ]; then
            sizelabel="XL"
          elif [ ${size} -gt 120 ]; then
            sizelabel="L"
          elif [ ${size} -gt 60 ]; then
            sizelabel="M"
          elif [ ${size} -gt 35 ]; then
            sizelabel="S"
          fi

          echo "Adding size: ${sizelabel}"
          curl -s --fail-with-body -X POST -H "Authorization: Bearer ${{ secrets.GITHUB_TOKEN }}" \
            -H "Accept: application/vnd.github.v3+json" \
            https://api.github.com/repos/${{ github.repository }}/issues/${{ github.event.pull_request.number }}/labels \
            -d "[\"size: ${sizelabel}\"]"