pr-size-control.yml

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

jobs:
  check_pr_size:
    name: Check PR size doesn't break set limit
    runs-on: ubuntu-latest
    steps:
      # Checkout the code with full history
      - name: Checkout repository
        uses: actions/checkout@v2
        with:
          fetch-depth: 0

      # Calculate PR size
      - name: Calculate PR size
        id: calculate_pr_size
        run: |
          size=$(git diff --stat origin/main \
          | grep -v .lock \
          | 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

      # Check if PR size exceeds limit
      - name: Validate PR size
        run: |
          if [[ $size -gt 500 ]]; then
            echo "Warning - total lines changed is greater than 500."
            echo "Please consider breaking this PR down."
            exit 1
          else
            echo "PR size is within acceptable limits."
          fi
        shell: bash