update-reqs.yml

name: Update requirements.txt

on:
  push:
    branches:
      - main

jobs:
  update-reqs:
    runs-on: ubuntu-latest

    steps:
      - name: Checkout code
        uses: actions/checkout@v3

      - name: Set up Python
        uses: actions/setup-python@v5
        with:
          python-version: '3.12'

      - name: Backup current requirements
        run: |
          if [ -f requirements.txt ]; then
            mv requirements.txt requirements.old
          else
            touch requirements.old
          fi

      - name: Install pipreqs
        run: pip install pipreqs

      - name: Generate new requirements
        run: pipreqs . --force --ignore .venv --mode gt

      - name: Restore old versions if they exist
        shell: python
        run: |
          import os
          def parse_reqs(filename):
              data = {}
              if not os.path.exists(filename):
                  return data
              with open(filename, 'r') as f:
                  for line in f:
                      line = line.strip()
                      if not line or line.startswith('#'): continue
                      parts = line.split('>=') if '>=' in line else line.split('==')
                      if len(parts) > 1:
                          data[parts[0].lower()] = line
              return data

          old_versions = parse_reqs('requirements.old')
          new_lines = []
          if os.path.exists('requirements.txt'):
              with open('requirements.txt', 'r') as f:
                  for line in f:
                      line = line.strip()
                      if not line: continue
                      pkg_name = line.split('>=')[0].split('==')[0].strip().lower()
                      if pkg_name in old_versions:
                          new_lines.append(old_versions[pkg_name])
                      else:
                          new_lines.append(line)

          with open('requirements.txt', 'w') as f:
              f.write('\n'.join(new_lines) + '\n')
          if os.path.exists('requirements.old'):
              os.remove('requirements.old')

      - name: Commit and push if changed
        run: |
          git config --global user.name "github-actions[bot]"
          git config --global user.email "github-actions[bot]@users.noreply.github.com"
          git add requirements.txt
          if git diff --cached --quiet; then
            echo "No changes in requirements.txt"
          else
            git commit -m "Updated requirements.txt"
            git push
          fi