def prepare_files(self, finder):
"""
Prepare process. Create temp directories, download and/or unpack files.
"""
# make the wheelhouse
if self.wheel_download_dir:
ensure_dir(self.wheel_download_dir)
# If any top-level requirement has a hash specified, enter
# hash-checking mode, which requires hashes from all.
root_reqs = self.unnamed_requirements + self.requirements.values()
require_hashes = (self.require_hashes or
any(req.has_hash_options for req in root_reqs))
# Actually prepare the files, and collect any exceptions. Most hash
# exceptions cannot be checked ahead of time, because
# req.populate_link() needs to be called before we can make decisions
# based on link type.
discovered_reqs = []
hash_errors = HashErrors()
for req in chain(root_reqs, discovered_reqs):
try:
discovered_reqs.extend(self._prepare_file(
finder,
req,
require_hashes=require_hashes,
ignore_dependencies=self.ignore_dependencies))
except HashError as exc:
exc.req = req
hash_errors.append(exc)
if hash_errors:
raise hash_errors
def resolve(self, requirement_set):
"""Resolve what operations need to be done
As a side-effect of this method, the packages (and their dependencies)
are downloaded, unpacked and prepared for installation. This
preparation is done by ``pip.operations.prepare``.
Once PyPI has static dependency metadata available, it would be
possible to move the preparation to become a step separated from
dependency resolution.
"""
# make the wheelhouse
if self.preparer.wheel_download_dir:
ensure_dir(self.preparer.wheel_download_dir)
# If any top-level requirement has a hash specified, enter
# hash-checking mode, which requires hashes from all.
root_reqs = (
requirement_set.unnamed_requirements +
requirement_set.requirements.values()
)
self.require_hashes = (
requirement_set.require_hashes or
any(req.has_hash_options for req in root_reqs)
)
# Display where finder is looking for packages
locations = self.finder.get_formatted_locations()
if locations:
logger.info(locations)
# Actually prepare the files, and collect any exceptions. Most hash
# exceptions cannot be checked ahead of time, because
# req.populate_link() needs to be called before we can make decisions
# based on link type.
discovered_reqs = []
hash_errors = HashErrors()
for req in chain(root_reqs, discovered_reqs):
try:
discovered_reqs.extend(
self._resolve_one(requirement_set, req)
)
except HashError as exc:
exc.req = req
hash_errors.append(exc)
if hash_errors:
raise hash_errors
def prepare_files(self, finder):
"""
Prepare process. Create temp directories, download and/or unpack files.
"""
# make the wheelhouse
if self.wheel_download_dir:
ensure_dir(self.wheel_download_dir)
# If any top-level requirement has a hash specified, enter
# hash-checking mode, which requires hashes from all.
root_reqs = self.unnamed_requirements + list(self.requirements.values())
require_hashes = (self.require_hashes or
any(req.has_hash_options for req in root_reqs))
if require_hashes and self.as_egg:
raise InstallationError(
'--egg is not allowed with --require-hashes mode, since it '
'delegates dependency resolution to setuptools and could thus '
'result in installation of unhashed packages.')
# Actually prepare the files, and collect any exceptions. Most hash
# exceptions cannot be checked ahead of time, because
# req.populate_link() needs to be called before we can make decisions
# based on link type.
discovered_reqs = []
hash_errors = HashErrors()
for req in chain(root_reqs, discovered_reqs):
try:
discovered_reqs.extend(self._prepare_file(
finder,
req,
require_hashes=require_hashes,
ignore_dependencies=self.ignore_dependencies))
except HashError as exc:
exc.req = req
hash_errors.append(exc)
if hash_errors:
raise hash_errors