def resolve(self, root_reqs, check_supported_wheels): # type: (List[InstallRequirement], bool) -> RequirementSet """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. """ requirement_set = RequirementSet(check_supported_wheels=check_supported_wheels) for req in root_reqs: if req.constraint: check_invalid_constraint_type(req) requirement_set.add_requirement(req) # Actually prepare the files, and collect any exceptions. Most hash # exceptions cannot be checked ahead of time, because # _populate_link() needs to be called before we can make decisions # based on link type. discovered_reqs = [] # type: List[InstallRequirement] hash_errors = HashErrors() for req in chain(requirement_set.all_requirements, 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 return requirement_set
def collect_root_requirements( self, root_ireqs: List[InstallRequirement]) -> CollectedRootRequirements: collected = CollectedRootRequirements([], {}, {}) for i, ireq in enumerate(root_ireqs): if ireq.constraint: # Ensure we only accept valid constraints problem = check_invalid_constraint_type(ireq) if problem: raise InstallationError(problem) if not ireq.match_markers(): continue assert ireq.name, "Constraint must be named" name = canonicalize_name(ireq.name) if name in collected.constraints: collected.constraints[name] &= ireq else: collected.constraints[name] = Constraint.from_ireq(ireq) else: req = self._make_requirement_from_install_req( ireq, requested_extras=(), ) if req is None: continue if ireq.user_supplied and req.name not in collected.user_requested: collected.user_requested[req.name] = i collected.requirements.append(req) return collected
def resolve(self, root_reqs, check_supported_wheels): # type: (List[InstallRequirement], bool) -> RequirementSet constraints = {} # type: Dict[str, Constraint] user_requested = set() # type: Set[str] requirements = [] for req in root_reqs: if req.constraint: # Ensure we only accept valid constraints problem = check_invalid_constraint_type(req) if problem: raise InstallationError(problem) if not req.match_markers(): continue name = canonicalize_name(req.name) if name in constraints: constraints[name] &= req else: constraints[name] = Constraint.from_ireq(req) else: if req.user_supplied and req.name: user_requested.add(canonicalize_name(req.name)) r = self.factory.make_requirement_from_install_req( req, requested_extras=(), ) if r is not None: requirements.append(r) provider = PipProvider( factory=self.factory, constraints=constraints, ignore_dependencies=self.ignore_dependencies, upgrade_strategy=self.upgrade_strategy, user_requested=user_requested, ) if "PIP_RESOLVER_DEBUG" in os.environ: reporter = PipDebuggingReporter() else: reporter = PipReporter() resolver = RLResolver(provider, reporter) try: try_to_avoid_resolution_too_deep = 2000000 self._result = resolver.resolve( requirements, max_rounds=try_to_avoid_resolution_too_deep, ) except ResolutionImpossible as e: error = self.factory.get_installation_error(e) six.raise_from(error, e) req_set = RequirementSet(check_supported_wheels=check_supported_wheels) for candidate in self._result.mapping.values(): ireq = candidate.get_install_requirement() if ireq is None: continue # Check if there is already an installation under the same name, # and set a flag for later stages to uninstall it, if needed. installed_dist = self.factory.get_dist_to_uninstall(candidate) if installed_dist is None: # There is no existing installation -- nothing to uninstall. ireq.should_reinstall = False elif self.factory.force_reinstall: # The --force-reinstall flag is set -- reinstall. ireq.should_reinstall = True elif installed_dist.parsed_version != candidate.version: # The installation is different in version -- reinstall. ireq.should_reinstall = True elif candidate.is_editable or dist_is_editable(installed_dist): # The incoming distribution is editable, or different in # editable-ness to installation -- reinstall. ireq.should_reinstall = True elif candidate.source_link.is_file: # The incoming distribution is under file:// if candidate.source_link.is_wheel: # is a local wheel -- do nothing. logger.info( "%s is already installed with the same version as the " "provided wheel. Use --force-reinstall to force an " "installation of the wheel.", ireq.name, ) continue looks_like_sdist = (is_archive_file( candidate.source_link.file_path) and candidate.source_link.ext != ".zip") if looks_like_sdist: # is a local sdist -- show a deprecation warning! reason = ( "Source distribution is being reinstalled despite an " "installed package having the same name and version as " "the installed package.") replacement = "use --force-reinstall" deprecated( reason=reason, replacement=replacement, gone_in="21.1", issue=8711, ) # is a local sdist or path -- reinstall ireq.should_reinstall = True else: continue link = candidate.source_link if link and link.is_yanked: # The reason can contain non-ASCII characters, Unicode # is required for Python 2. msg = ('The candidate selected for download or install is a ' 'yanked version: {name!r} candidate (version {version} ' 'at {link})\nReason for being yanked: {reason}').format( name=candidate.name, version=candidate.version, link=link, reason=link.yanked_reason or '<none given>', ) logger.warning(msg) req_set.add_named_requirement(ireq) reqs = req_set.all_requirements self.factory.preparer.prepare_linked_requirements_more(reqs) return req_set
def resolve(self, root_reqs, check_supported_wheels): # type: (List[InstallRequirement], bool) -> RequirementSet constraints = {} # type: Dict[str, SpecifierSet] user_requested = set() # type: Set[str] requirements = [] for req in root_reqs: if req.constraint: # Ensure we only accept valid constraints problem = check_invalid_constraint_type(req) if problem: raise InstallationError(problem) if not req.match_markers(): continue name = canonicalize_name(req.name) if name in constraints: constraints[name] = constraints[name] & req.specifier else: constraints[name] = req.specifier else: if req.user_supplied and req.name: user_requested.add(canonicalize_name(req.name)) r = self.factory.make_requirement_from_install_req( req, requested_extras=(), ) if r is not None: requirements.append(r) provider = PipProvider( factory=self.factory, constraints=constraints, ignore_dependencies=self.ignore_dependencies, upgrade_strategy=self.upgrade_strategy, user_requested=user_requested, ) reporter = BaseReporter() resolver = RLResolver(provider, reporter) try: try_to_avoid_resolution_too_deep = 2000000 self._result = resolver.resolve( requirements, max_rounds=try_to_avoid_resolution_too_deep, ) except ResolutionImpossible as e: error = self.factory.get_installation_error(e) six.raise_from(error, e) req_set = RequirementSet(check_supported_wheels=check_supported_wheels) for candidate in self._result.mapping.values(): ireq = candidate.get_install_requirement() if ireq is None: continue # Check if there is already an installation under the same name, # and set a flag for later stages to uninstall it, if needed. # * There isn't, good -- no uninstalltion needed. # * The --force-reinstall flag is set. Always reinstall. # * The installation is different in version or editable-ness, so # we need to uninstall it to install the new distribution. # * The installed version is the same as the pending distribution. # Skip this distrubiton altogether to save work. installed_dist = self.factory.get_dist_to_uninstall(candidate) if installed_dist is None: ireq.should_reinstall = False elif self.factory.force_reinstall: ireq.should_reinstall = True elif installed_dist.parsed_version != candidate.version: ireq.should_reinstall = True elif dist_is_editable(installed_dist) != candidate.is_editable: ireq.should_reinstall = True else: continue link = candidate.source_link if link and link.is_yanked: # The reason can contain non-ASCII characters, Unicode # is required for Python 2. msg = ( u'The candidate selected for download or install is a ' u'yanked version: {name!r} candidate (version {version} ' u'at {link})\nReason for being yanked: {reason}').format( name=candidate.name, version=candidate.version, link=link, reason=link.yanked_reason or u'<none given>', ) logger.warning(msg) req_set.add_named_requirement(ireq) return req_set
self._result = None # type: Optional[Result] def resolve(self, root_reqs, check_supported_wheels): # type: (List[InstallRequirement], bool) -> RequirementSet <<<<<<< HEAD constraints = {} # type: Dict[str, Constraint] ======= constraints = {} # type: Dict[str, SpecifierSet] >>>>>>> 74c061954d5e927be4caafbd793e96a50563c265 user_requested = set() # type: Set[str] requirements = [] for req in root_reqs: if req.constraint: # Ensure we only accept valid constraints problem = check_invalid_constraint_type(req) if problem: raise InstallationError(problem) <<<<<<< HEAD if not req.match_markers(): continue name = canonicalize_name(req.name) if name in constraints: constraints[name] &= req else: constraints[name] = Constraint.from_ireq(req) ======= name = canonicalize_name(req.name) if name in constraints: constraints[name] = constraints[name] & req.specifier
def resolve(self, root_reqs, check_supported_wheels): # type: (List[InstallRequirement], bool) -> RequirementSet constraints = {} # type: Dict[str, SpecifierSet] user_requested = set() # type: Set[str] requirements = [] for req in root_reqs: if req.constraint: # Ensure we only accept valid constraints problem = check_invalid_constraint_type(req) if problem: raise InstallationError(problem) name = canonicalize_name(req.name) if name in constraints: constraints[name] = constraints[name] & req.specifier else: constraints[name] = req.specifier else: if req.user_supplied and req.name: user_requested.add(canonicalize_name(req.name)) r = self.factory.make_requirement_from_install_req( req, requested_extras=(), ) if r is not None: requirements.append(r) provider = PipProvider( factory=self.factory, constraints=constraints, ignore_dependencies=self.ignore_dependencies, upgrade_strategy=self.upgrade_strategy, user_requested=user_requested, ) reporter = BaseReporter() resolver = RLResolver(provider, reporter) try: try_to_avoid_resolution_too_deep = 2000000 self._result = resolver.resolve( requirements, max_rounds=try_to_avoid_resolution_too_deep, ) except ResolutionImpossible as e: error = self.factory.get_installation_error(e) six.raise_from(error, e) req_set = RequirementSet(check_supported_wheels=check_supported_wheels) for candidate in self._result.mapping.values(): ireq = candidate.get_install_requirement() if ireq is None: continue link = candidate.source_link if link and link.is_yanked: # The reason can contain non-ASCII characters, Unicode # is required for Python 2. msg = ( u'The candidate selected for download or install is a ' u'yanked version: {name!r} candidate (version {version} ' u'at {link})\nReason for being yanked: {reason}' ).format( name=candidate.name, version=candidate.version, link=link, reason=link.yanked_reason or u'<none given>', ) logger.warning(msg) ireq.should_reinstall = self.factory.should_reinstall(candidate) req_set.add_named_requirement(ireq) return req_set
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. """ requirement_set = RequirementSet( check_supported_wheels=check_supported_wheels ) for req in root_reqs: <<<<<<< HEAD if req.constraint: check_invalid_constraint_type(req) ======= >>>>>>> b66a76afa15ab74019740676a52a071b85ed8f71 requirement_set.add_requirement(req) # Actually prepare the files, and collect any exceptions. Most hash # exceptions cannot be checked ahead of time, because # _populate_link() needs to be called before we can make decisions # based on link type. discovered_reqs = [] # type: List[InstallRequirement] hash_errors = HashErrors() <<<<<<< HEAD for req in chain(requirement_set.all_requirements, discovered_reqs): ======= for req in chain(root_reqs, discovered_reqs): >>>>>>> b66a76afa15ab74019740676a52a071b85ed8f71