pr_size_labeler.yaml

name: "PR Size Labeler"

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

jobs:
  label:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout repository
        uses: actions/checkout@v3

      - name: Get PR Size
        id: get_pr_size
        run: |
          CHANGED_FILES=$(jq '.pull_request.changed_files' $GITHUB_EVENT_PATH)
          ADDITIONS=$(jq '.pull_request.additions' $GITHUB_EVENT_PATH)
          DELETIONS=$(jq '.pull_request.deletions' $GITHUB_EVENT_PATH)
          echo "CHANGED_FILES=$CHANGED_FILES" >> $GITHUB_ENV
          echo "ADDITIONS=$ADDITIONS" >> $GITHUB_ENV
          echo "DELETIONS=$DELETIONS" >> $GITHUB_ENV

        # OBS that we are cuurently not on a stable version, thus major is disabled for now
      - name: Apply Labels Based on Size
        if: ${{ github.event.pull_request.changed_files != '' }}
        run: |
          PATCH_THRESHOLD=10
          MINOR_THRESHOLD=500
          MAJOR_THRESHOLD=1000

          TOTAL_CHANGES=$(($ADDITIONS + $DELETIONS))

          echo "Total changes: $TOTAL_CHANGES"

          if [ "$TOTAL_CHANGES" -le "$PATCH_THRESHOLD" ]; then
            LABEL="patch"
          elif [ "$TOTAL_CHANGES" -le "$MINOR_THRESHOLD" ]; then
            LABEL="minor"
          else
            LABEL="minor"
          fi

          echo "Applying label: $LABEL"

          curl -s -X POST -H "Authorization: token $GITHUB_TOKEN" \
            -H "Accept: application/vnd.github.v3+json" \
            https://api.github.com/repos/${{ github.repository }}/issues/${{ github.event.pull_request.number }}/labels \
            -d "{\"labels\":[\"$LABEL\"]}"

        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
          ADDITIONS: ${{ env.ADDITIONS }}
          DELETIONS: ${{ env.DELETIONS }}