import pkg_resources
import sys

def main():
    requirements_file = sys.argv[1]
    with open(requirements_file, 'r') as f:
        required_packages = [line.strip().split('#')[0].strip() for line in f.readlines()]

    installed_packages = [package.key for package in pkg_resources.working_set]

    missing_packages = []
    for package in required_packages:
        if not package:  # Skip empty lines
            continue
        package_name = package.strip().split('==')[0]
        if package_name.lower() not in installed_packages:
            missing_packages.append(package_name)

    if missing_packages:
        print('Missing packages:')
        print(', '.join(missing_packages))
        sys.exit(1)
    else:
        print('All packages are installed.')

if __name__ == '__main__':
    main()