restrict-pr-size.yml

name: 'PR Size Checker'
on:
  pull_request:
    branches:
      - main

env:
  MAX_LINE_CHANGED: 1200 # Maximum number of lines changed allowed
  TARGET_BRANCH: main

permissions:
  contents: read

jobs:
  build:
    runs-on: ubuntu-latest
    permissions:
      actions: read
      contents: read
      deployments: read
      packages: none
    steps:
    # checkout your code with your git history
      - name: Checkout code
        uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4.1.7
        with:
          fetch-depth: 0
      - id: get_total_lines_changed
        run: |
            size=$(git diff --stat origin/${{ env.TARGET_BRANCH }} \
            | grep -v .lock \
            | grep -v Bin \
            | awk -F"|" '{ print $2 }' \
            | awk '{ print $1 }' \
            | sed '/^$/d' \
            | paste -sd+ - \
            | bc)

            echo "size=${size}" >> $GITHUB_ENV
            echo ""
            echo "Total lines changed (note: *.lock files are excluded from this count): "
            echo $size
        shell: bash
      - run: |
          COMMITMSG=$(git log --format=%B -n 1 ${{github.event.after}})
          echo "${COMMITMSG}"
          if [[ $size -gt ${{ env.MAX_LINE_CHANGED }} && "${COMMITMSG}" != *"[skip pr-size]"* ]]
          then
          echo "Warning - total lines changed is greater than" ${{ env.MAX_LINE_CHANGED }}.
          echo "Please consider breaking this PR down."
          exit 1
          fi
        shell: bash