large-files.yml

name: Check for large files

on:
  pull_request_target:
    types: [opened, edited, reopened, synchronize]

jobs:
  check_large_files:
   permissions:
      issues: write
      pull-requests: write
   runs-on: ubuntu-latest
   steps:
    - name: Checkout repository
      uses: actions/checkout@v4
      with:
          fetch-depth: 0

    - name: Check for PDFs and large files
      run: |
        git fetch origin main
        changed_files_with_sizes=$(git diff --numstat origin/main...HEAD)
        has_large_file=false
        IFS=$'\n'
        for line in $changed_files_with_sizes; do
          size=$(echo "${line}" | awk '{print $1}')
          file=$(echo "${line}" | awk '{print $3}')
          # Any file larger than 3MB or PDF
          if [[ ${size} -gt $((3 * 1024 * 1024)) ]] || [[ "${file}" == *.pdf ]]; then
            has_large_file=true
            break
          fi
        done
        echo "HAS_LARGE_FILE=${has_large_file}" >> $GITHUB_ENV

    - name: Comment on PR
      id: comment
      if: ${{ env.HAS_LARGE_FILE == 'true' }}
      uses: thollander/actions-comment-pull-request@v2
      with:
        message: |
           :warning: Warning: This PR contains a PDF or large file(s). In most cases, you should use the [asset repository](https://github.com/devopsdays/devopsdays-assets/)