import os
from shutil import rmtree

from .click import secho
from pip.utils.appdirs import user_cache_dir

# The user_cache_dir helper comes straight from pip itself
CACHE_DIR = user_cache_dir('pip-tools')

# NOTE
# We used to store the cache dir under ~/.pip-tools, which is not the
# preferred place to store caches for any platform.  This has been addressed
# in pip-tools==1.0.5, but to be good citizens, we point this out explicitly
# to the user when this directory is still found.
LEGACY_CACHE_DIR = os.path.expanduser('~/.pip-tools')

if os.path.exists(LEGACY_CACHE_DIR):
    secho('Removing old cache dir {} (new cache dir is {})'.format(LEGACY_CACHE_DIR, CACHE_DIR), fg='yellow')
    rmtree(LEGACY_CACHE_DIR)
