def __init__(self,
index_url="https://pypi.org/simple/",
hosts=('*', ),
ca_bundle=None,
verify_ssl=True,
*args,
**kw):
Environment.__init__(self, *args, **kw)
self.index_url = index_url + "/"[:not index_url.endswith('/')]
self.scanned_urls = {}
self.fetched_urls = {}
self.package_pages = {}
self.allows = re.compile('|'.join(map(translate, hosts))).match
self.to_scan = []
use_ssl = (verify_ssl and ssl_support.is_available
and (ca_bundle or ssl_support.find_ca_bundle()))
if use_ssl:
self.opener = ssl_support.opener_for(ca_bundle)
else:
self.opener = urllib.request.urlopen
def _load_internal_cache(cls, pex, pex_info):
"""Possibly cache out the internal cache."""
internal_cache = os.path.join(pex, pex_info.internal_cache)
with TRACER.timed("Searching dependency cache: %s" % internal_cache, V=2):
if len(pex_info.distributions) == 0:
# We have no .deps to load.
return
if os.path.isdir(pex):
search_path = [
os.path.join(internal_cache, dist_chroot)
for dist_chroot in os.listdir(internal_cache)
]
internal_env = Environment(search_path=search_path)
for dist_name in internal_env:
for dist in internal_env[dist_name]:
yield dist
else:
with open_zip(pex) as zf:
for dist in cls._write_zipped_internal_cache(zf, pex_info):
yield dist
def _iter_requirements_requests(self, install_requests):
if self.is_installed:
# N.B.: Direct snip from the Environment docs:
#
# You may explicitly set `platform` (and/or `python`) to ``None`` if you
# wish to map *all* distributions, not just those compatible with the
# running platform or Python version.
#
# Since our requested target may be foreign, we make sure find all distributions installed by
# explicitly setting both `python` and `platform` to `None`.
environment = Environment(search_path=[self.install_chroot],
python=None,
platform=None)
distributions = []
for dist_project_name in environment:
distributions.extend(environment[dist_project_name])
for install_request in install_requests:
yield DistributionRequirements.Request(
target=install_request.target, distributions=distributions)