Resolve transient dependencies for any number of checks.
    If you want to do this en masse, put `all`.

def resolve(checks, lazy, quiet):
    """Resolve transient dependencies for any number of checks.
    If you want to do this en masse, put `all`.
    """
    root = get_root()
    if 'all' in checks:
        checks = os.listdir(root)

    for check_name in sorted(checks):
        pinned_reqs_file = os.path.join(root, check_name, 'requirements.in')
        resolved_reqs_file = os.path.join(root, check_name, 'requirements.txt')

        if os.path.isfile(pinned_reqs_file):
            if not quiet:
                echo_info('Check `{}`:'.format(check_name))

            if not quiet:
                echo_waiting('    Resolving dependencies...')

            pre_packages = read_packages(resolved_reqs_file)
            result = resolve_requirements(pinned_reqs_file, resolved_reqs_file, lazy=lazy)
            if result.code:
                abort(result.stdout + result.stderr)

            if not quiet:
                post_packages = read_packages(resolved_reqs_file)
                display_package_changes(pre_packages, post_packages, indent='    ')