diff options
Diffstat (limited to '.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/req/req_set.py')
| -rw-r--r-- | .emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/req/req_set.py | 193 |
1 files changed, 193 insertions, 0 deletions
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/req/req_set.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/req/req_set.py new file mode 100644 index 00000000..d1966a4a --- /dev/null +++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/req/req_set.py @@ -0,0 +1,193 @@ +from __future__ import absolute_import + +import logging +from collections import OrderedDict + +from pip._internal.exceptions import InstallationError +from pip._internal.utils.logging import indent_log +from pip._internal.utils.typing import MYPY_CHECK_RUNNING +from pip._internal.wheel import Wheel + +if MYPY_CHECK_RUNNING: + from typing import Dict, Iterable, List, Optional, Tuple + from pip._internal.req.req_install import InstallRequirement + + +logger = logging.getLogger(__name__) + + +class RequirementSet(object): + + def __init__(self, require_hashes=False, check_supported_wheels=True): + # type: (bool, bool) -> None + """Create a RequirementSet. + """ + + self.requirements = OrderedDict() # type: Dict[str, InstallRequirement] # noqa: E501 + self.require_hashes = require_hashes + self.check_supported_wheels = check_supported_wheels + + # Mapping of alias: real_name + self.requirement_aliases = {} # type: Dict[str, str] + self.unnamed_requirements = [] # type: List[InstallRequirement] + self.successfully_downloaded = [] # type: List[InstallRequirement] + self.reqs_to_cleanup = [] # type: List[InstallRequirement] + + def __str__(self): + # type: () -> str + reqs = [req for req in self.requirements.values() + if not req.comes_from] + reqs.sort(key=lambda req: req.name.lower()) + return ' '.join([str(req.req) for req in reqs]) + + def __repr__(self): + # type: () -> str + reqs = [req for req in self.requirements.values()] + reqs.sort(key=lambda req: req.name.lower()) + reqs_str = ', '.join([str(req.req) for req in reqs]) + return ('<%s object; %d requirement(s): %s>' + % (self.__class__.__name__, len(reqs), reqs_str)) + + def add_requirement( + self, + install_req, # type: InstallRequirement + parent_req_name=None, # type: Optional[str] + extras_requested=None # type: Optional[Iterable[str]] + ): + # type: (...) -> Tuple[List[InstallRequirement], Optional[InstallRequirement]] # noqa: E501 + """Add install_req as a requirement to install. + + :param parent_req_name: The name of the requirement that needed this + added. The name is used because when multiple unnamed requirements + resolve to the same name, we could otherwise end up with dependency + links that point outside the Requirements set. parent_req must + already be added. Note that None implies that this is a user + supplied requirement, vs an inferred one. + :param extras_requested: an iterable of extras used to evaluate the + environment markers. + :return: Additional requirements to scan. That is either [] if + the requirement is not applicable, or [install_req] if the + requirement is applicable and has just been added. + """ + name = install_req.name + + # If the markers do not match, ignore this requirement. + if not install_req.match_markers(extras_requested): + logger.info( + "Ignoring %s: markers '%s' don't match your environment", + name, install_req.markers, + ) + return [], None + + # If the wheel is not supported, raise an error. + # Should check this after filtering out based on environment markers to + # allow specifying different wheels based on the environment/OS, in a + # single requirements file. + if install_req.link and install_req.link.is_wheel: + wheel = Wheel(install_req.link.filename) + if self.check_supported_wheels and not wheel.supported(): + raise InstallationError( + "%s is not a supported wheel on this platform." % + wheel.filename + ) + + # This next bit is really a sanity check. + assert install_req.is_direct == (parent_req_name is None), ( + "a direct req shouldn't have a parent and also, " + "a non direct req should have a parent" + ) + + # Unnamed requirements are scanned again and the requirement won't be + # added as a dependency until after scanning. + if not name: + # url or path requirement w/o an egg fragment + self.unnamed_requirements.append(install_req) + return [install_req], None + + try: + existing_req = self.get_requirement(name) + except KeyError: + existing_req = None + + has_conflicting_requirement = ( + parent_req_name is None and + existing_req and + not existing_req.constraint and + existing_req.extras == install_req.extras and + existing_req.req.specifier != install_req.req.specifier + ) + if has_conflicting_requirement: + raise InstallationError( + "Double requirement given: %s (already in %s, name=%r)" + % (install_req, existing_req, name) + ) + + # When no existing requirement exists, add the requirement as a + # dependency and it will be scanned again after. + if not existing_req: + self.requirements[name] = install_req + # FIXME: what about other normalizations? E.g., _ vs. -? + if name.lower() != name: + self.requirement_aliases[name.lower()] = name + # We'd want to rescan this requirements later + return [install_req], install_req + + # Assume there's no need to scan, and that we've already + # encountered this for scanning. + if install_req.constraint or not existing_req.constraint: + return [], existing_req + + does_not_satisfy_constraint = ( + install_req.link and + not ( + existing_req.link and + install_req.link.path == existing_req.link.path + ) + ) + if does_not_satisfy_constraint: + self.reqs_to_cleanup.append(install_req) + raise InstallationError( + "Could not satisfy constraints for '%s': " + "installation from path or url cannot be " + "constrained to a version" % name, + ) + # If we're now installing a constraint, mark the existing + # object for real installation. + existing_req.constraint = False + existing_req.extras = tuple(sorted( + set(existing_req.extras) | set(install_req.extras) + )) + logger.debug( + "Setting %s extras to: %s", + existing_req, existing_req.extras, + ) + # Return the existing requirement for addition to the parent and + # scanning again. + return [existing_req], existing_req + + def has_requirement(self, project_name): + # type: (str) -> bool + name = project_name.lower() + if (name in self.requirements and + not self.requirements[name].constraint or + name in self.requirement_aliases and + not self.requirements[self.requirement_aliases[name]].constraint): + return True + return False + + def get_requirement(self, project_name): + # type: (str) -> InstallRequirement + for name in project_name, project_name.lower(): + if name in self.requirements: + return self.requirements[name] + if name in self.requirement_aliases: + return self.requirements[self.requirement_aliases[name]] + raise KeyError("No project with the name %r" % project_name) + + def cleanup_files(self): + # type: () -> None + """Clean up files, remove builds.""" + logger.debug('Cleaning up...') + with indent_log(): + for req in self.reqs_to_cleanup: + req.remove_temporary_source() |