from grow.pods import pods
from grow.pods import storage
import click
import os


@click.command()
@click.argument('pod_path', default='.')
@click.option('--source', type=click.Path(), required=True,
              help='Path to source (either zip file, directory, or file).')
@click.option('--locale', type=str,
              help='Locale of the message catalog to import. This option is'
                   ' only applicable when --source is a .po file.')
def import_translations(pod_path, source, locale):
    """Imports translations from an external source."""
    if source.endswith('.po') and locale is None:
        text = 'Must specify --locale when --source is a .po file.'
        raise click.ClickException(text)
    if not source.endswith('.po') and locale is not None:
        text = 'Cannot specify --locale when --source is not a .po file.'
        raise click.ClickException(text)
    source = os.path.expanduser(source)
    root = os.path.abspath(os.path.join(os.getcwd(), pod_path))
    pod = pods.Pod(root, storage=storage.FileStorage)
    if not pod.exists():
        raise click.ClickException('Pod does not exist: {}'.format(pod.root))
    pod.catalogs.import_translations(source, locale=locale)

from grow.pods import pods
from grow.pods import storage
import click
import os


@click.command()
@click.argument('pod_path', default='.')
@click.option('--source', type=click.Path(), required=True,
              help='Path to source (either zip file, directory, or file).')
@click.option('--locale', type=str,
              help='Locale of the message catalog to import. This option is'
                   ' only applicable when --source is a .po file.')
def import_translations(pod_path, source, locale):
    """Imports translations from an external source."""
    if source.endswith('.po') and locale is None:
        text = 'Must specify --locale when --source is a .po file.'
        raise click.ClickException(text)
    if not source.endswith('.po') and locale is not None:
        text = 'Cannot specify --locale when --source is not a .po file.'
        raise click.ClickException(text)
    source = os.path.expanduser(source)
    root = os.path.abspath(os.path.join(os.getcwd(), pod_path))
    pod = pods.Pod(root, storage=storage.FileStorage)
    if not pod.exists:
        raise click.ClickException('Pod does not exist: {}'.format(pod.root))
    pod.catalogs.import_translations(source, locale=locale)

Use pod.exists.