name: File Size Check

on: [push, pull_request]

jobs:
  build:

    runs-on: ubuntu-latest
    strategy:
      matrix:
        python-version: ["3.10"]

    steps:
    - uses: actions/checkout@v2
    - name: Set up Python ${{ matrix.python-version }}
      uses: actions/setup-python@v2
      with:
        python-version: ${{ matrix.python-version }}
    - name: Get changed files
      id: changed-files
      uses: tj-actions/changed-files@v18.4
    - name: List all changed files
      run: |
        # MAXSIZE is 1 MB
        MAXSIZE=1000000
        for FILENAME in ${{ steps.changed-files.outputs.all_changed_files }}; do
          FILESIZE=$(stat -c%s "$FILENAME")
          echo "Size of $FILENAME = $FILESIZE bytes."
          if (( FILESIZE > MAXSIZE)); then
            echo "$FILENAME is too big. Only $MAXSIZE bytes allowed."
            exit 1
          fi
        done