def check_if_exists(self, use_user_site): # type: (bool) -> None """Find an installed distribution that satisfies or conflicts with this requirement, and set self.satisfied_by or self.should_reinstall appropriately. """ if self.req is None: return existing_dist = get_distribution(self.req.name) if not existing_dist: return existing_version = existing_dist.parsed_version if not self.req.specifier.contains(existing_version, prereleases=True): self.satisfied_by = None if use_user_site: if dist_in_usersite(existing_dist): self.should_reinstall = True elif (running_under_virtualenv() and dist_in_site_packages(existing_dist)): raise InstallationError( "Will not install to the user site because it will " "lack sys.path precedence to {} in {}".format( existing_dist.project_name, existing_dist.location)) elif dist_in_install_path(existing_dist): self.should_reinstall = True else: if self.editable: self.should_reinstall = True # when installing editables, nothing pre-existing should ever # satisfy self.satisfied_by = None else: self.satisfied_by = existing_dist
def _set_req_to_reinstall(self, req: InstallRequirement) -> None: """ Set a requirement to be installed. """ # Don't uninstall the conflict if doing a user install and the # conflict is not a user install. if ((not self.use_user_site or dist_in_usersite(req.satisfied_by)) and dist_in_install_path(req.satisfied_by)): req.should_reinstall = True req.satisfied_by = None
def _set_req_to_reinstall(self, req): """ Set a requirement to be installed. """ # Don't uninstall the conflict if doing a user install and the # conflict is not a user install. if ((not self.use_user_site or dist_in_usersite(req.satisfied_by)) and dist_in_install_path(req.satisfied_by)): req.conflicts_with = req.satisfied_by req.satisfied_by = None
def check_if_exists(self, use_user_site): # type: (bool) -> bool """Find an installed distribution that satisfies or conflicts with this requirement, and set self.satisfied_by or self.conflicts_with appropriately. """ if self.req is None: return False try: # get_distribution() will resolve the entire list of requirements # anyway, and we've already determined that we need the requirement # in question, so strip the marker so that we don't try to # evaluate it. no_marker = Requirement(str(self.req)) no_marker.marker = None self.satisfied_by = pkg_resources.get_distribution(str(no_marker)) if self.editable and self.satisfied_by: self.conflicts_with = self.satisfied_by # when installing editables, nothing pre-existing should ever # satisfy self.satisfied_by = None return True except pkg_resources.DistributionNotFound: return False except pkg_resources.VersionConflict: existing_dist = pkg_resources.get_distribution( self.req.name ) if use_user_site: if dist_in_usersite(existing_dist): self.conflicts_with = existing_dist elif (running_under_virtualenv() and dist_in_site_packages(existing_dist)): raise InstallationError( "Will not install to the user site because it will " "lack sys.path precedence to %s in %s" % (existing_dist.project_name, existing_dist.location) ) elif dist_in_install_path(existing_dist): self.conflicts_with = existing_dist return True
def check_if_exists(self, use_user_site: bool) -> None: """Find an installed distribution that satisfies or conflicts with this requirement, and set self.satisfied_by or self.should_reinstall appropriately. """ if self.req is None: return existing_dist = get_distribution(self.req.name) if not existing_dist: return # pkg_resouces may contain a different copy of packaging.version from # pip in if the downstream distributor does a poor job debundling pip. # We avoid existing_dist.parsed_version and let SpecifierSet.contains # parses the version instead. existing_version = existing_dist.version version_compatible = (existing_version is not None and self.req.specifier.contains( existing_version, prereleases=True)) if not version_compatible: self.satisfied_by = None if use_user_site: if dist_in_usersite(existing_dist): self.should_reinstall = True elif (running_under_virtualenv() and dist_in_site_packages(existing_dist)): raise InstallationError( "Will not install to the user site because it will " "lack sys.path precedence to {} in {}".format( existing_dist.project_name, existing_dist.location)) elif dist_in_install_path(existing_dist): self.should_reinstall = True else: if self.editable: self.should_reinstall = True # when installing editables, nothing pre-existing should ever # satisfy self.satisfied_by = None else: self.satisfied_by = existing_dist