Python req_set.RequirementSet方法代码示例

# 需要导入模块: from pip._internal.req import req_set [as 别名]
# 或者: from pip._internal.req.req_set import RequirementSet [as 别名]
def get_installation_order(self, req_set):
        # type: (RequirementSet) -> List[InstallRequirement]
        """Create the installation order.

        The installation order is topological - requirements are installed
        before the requiring thing. We break cycles at an arbitrary point,
        and make no other guarantees.
        """
        # The current implementation, which we may change at any point
        # installs the user specified things in the order given, except when
        # dependencies must come earlier to achieve topological order.
        order = []
        ordered_reqs = set()  # type: Set[InstallRequirement]

        def schedule(req):
            if req.satisfied_by or req in ordered_reqs:
                return
            if req.constraint:
                return
            ordered_reqs.add(req)
            for dep in self._discovered_dependencies[req.name]:
                schedule(dep)
            order.append(req)

        for install_req in req_set.requirements.values():
            schedule(install_req)
        return order 

# 需要导入模块: from pip._internal.req import req_set [as 别名]
# 或者: from pip._internal.req.req_set import RequirementSet [as 别名]
def resolve(self, requirement_set):
        # type: (RequirementSet) -> None
        """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 +
            list(requirement_set.requirements.values())
        )

        # 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 = []  # type: List[InstallRequirement]
        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 

# 需要导入模块: from pip._internal.req import req_set [as 别名]
# 或者: from pip._internal.req.req_set import RequirementSet [as 别名]
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:
            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(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

        return requirement_set 

# 需要导入模块: from pip._internal.req import req_set [as 别名]
# 或者: from pip._internal.req.req_set import RequirementSet [as 别名]
def resolve(self, root_reqs, check_supported_wheels):
        # type: (List[InstallRequirement], bool) -> RequirementSet
        raise NotImplementedError() 

# 需要导入模块: from pip._internal.req import req_set [as 别名]
# 或者: from pip._internal.req.req_set import RequirementSet [as 别名]
def get_installation_order(self, req_set):
        # type: (RequirementSet) -> List[InstallRequirement]
        raise NotImplementedError() 

# 需要导入模块: from pip._internal.req import req_set [as 别名]
# 或者: from pip._internal.req.req_set import RequirementSet [as 别名]
def resolve(self, requirement_set):
        # type: (RequirementSet) -> None
        """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 +
            list(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 = []  # type: List[InstallRequirement]
        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 

# 需要导入模块: from pip._internal.req import req_set [as 别名]
# 或者: from pip._internal.req.req_set import RequirementSet [as 别名]
def resolve(self, root_reqs, check_supported_wheels):
        # type: (List[InstallRequirement], bool) -> RequirementSet

        # FIXME: Implement constraints.
        if any(r.constraint for r in root_reqs):
            raise InstallationError("Constraints are not yet supported.")

        provider = PipProvider(
            factory=self.factory,
            ignore_dependencies=self.ignore_dependencies,
        )
        reporter = BaseReporter()
        resolver = RLResolver(provider, reporter)

        requirements = [
            self.factory.make_requirement_from_install_req(r)
            for r in root_reqs
        ]

        try:
            self._result = resolver.resolve(requirements)

        except ResolutionImpossible as e:
            error = self.factory.get_installation_error(e)
            if not error:
                # TODO: This needs fixing, we need to look at the
                # factory.get_installation_error infrastructure, as that
                # doesn't really allow for the logger.critical calls I'm
                # using here.
                for req, parent in e.causes:
                    logger.critical(
                        "Could not find a version that satisfies " +
                        "the requirement " +
                        str(req) +
                        ("" if parent is None else " (from {})".format(
                            parent.name
                        ))
                    )
                raise InstallationError(
                    "No matching distribution found for " +
                    ", ".join([r.name for r, _ in e.causes])
                )
                raise
            six.raise_from(error, e)

        req_set = RequirementSet(check_supported_wheels=check_supported_wheels)
        for candidate in self._result.mapping.values():
            ireq = provider.get_install_requirement(candidate)
            if ireq is None:
                continue
            ireq.should_reinstall = self.factory.should_reinstall(candidate)
            req_set.add_named_requirement(ireq)

        return req_set 

# 需要导入模块: from pip._internal.req import req_set [as 别名]
# 或者: from pip._internal.req.req_set import RequirementSet [as 别名]
def resolve(self, requirement_set):
        # type: (RequirementSet) -> None
        """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 +
            list(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
        search_scope = self.finder.search_scope
        locations = search_scope.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 = []  # type: List[InstallRequirement]
        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