| # |
| # Copyright (C) 2020 Codethink Limited |
| # |
| # This program is free software; you can redistribute it and/or |
| # modify it under the terms of the GNU Lesser General Public |
| # License as published by the Free Software Foundation; either |
| # version 2 of the License, or (at your option) any later version. |
| # |
| # This library is distributed in the hope that it will be useful, |
| # but WITHOUT ANY WARRANTY; without even the implied warranty of |
| # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| # Lesser General Public License for more details. |
| # |
| # You should have received a copy of the GNU Lesser General Public |
| # License along with this library. If not, see <http://www.gnu.org/licenses/>. |
| # |
| # Authors: |
| # Tristan Van Berkom <tristan.vanberkom@codethink.co.uk> |
| |
| from functools import cmp_to_key |
| |
| from pyroaring import BitMap, FrozenBitMap # pylint: disable=no-name-in-module |
| |
| from .._exceptions import LoadError |
| from ..exceptions import LoadErrorReason |
| from ..element import Element |
| from ..node cimport MappingNode, Node, ProvenanceInformation, ScalarNode, SequenceNode |
| from .types import Symbol |
| |
| |
| # Counter to get ids to LoadElements |
| cdef int _counter = 0 |
| |
| cdef int _next_synthetic_counter(): |
| global _counter |
| _counter += 1 |
| return _counter |
| |
| |
| # Dependency(): |
| # |
| # Early stage data model for dependencies objects, the LoadElement has |
| # Dependency objects which in turn refer to other LoadElements in the data |
| # model. |
| # |
| # The constructor is incomplete, normally dependencies are loaded |
| # via the Dependency.load() API below. The constructor arguments are |
| # only used as a convenience to create the dummy Dependency objects |
| # at the toplevel of the load sequence in the Loader. |
| # |
| # Args: |
| # element (LoadElement): a LoadElement on which there is a dependency |
| # dep_type (str): the type of dependency this dependency link is |
| # |
| cdef class Dependency: |
| cdef readonly LoadElement element # The resolved LoadElement |
| cdef readonly str dep_type # The dependency type (runtime or build or both) |
| cdef readonly str name # The project local dependency name |
| cdef readonly str junction # The junction path of the dependency name, if any |
| cdef readonly bint strict # Whether this is a strict dependency |
| cdef Node _node # The original node of the dependency |
| |
| def __cinit__(self, element=None, dep_type=None): |
| self.element = element |
| self.dep_type = dep_type |
| self.name = None |
| self.junction = None |
| self.strict = False |
| self._node = None |
| |
| # provenance |
| # |
| # A property to return the ProvenanceInformation for this |
| # dependency. |
| # |
| @property |
| def provenance(self): |
| return self._node.get_provenance() |
| |
| # set_element() |
| # |
| # Sets the resolved LoadElement |
| # |
| # When Dependencies are initially loaded, the `element` member |
| # will be None until later on when the Loader loads the LoadElement |
| # objects based on the Dependency `name` and `junction`, the Loader |
| # will then call this to resolve the `element` member. |
| # |
| # Args: |
| # element (LoadElement): The resolved LoadElement |
| # |
| cpdef set_element(self, element: LoadElement): |
| self.element = element |
| |
| # load() |
| # |
| # Load the dependency from a Node |
| # |
| # Args: |
| # dep (Node): A node to load the dependency from |
| # default_dep_type (str): The default dependency type |
| # |
| cdef load(self, Node dep, str default_dep_type): |
| cdef str dep_type |
| |
| self._node = dep |
| self.element = None |
| |
| if type(dep) is ScalarNode: |
| self.name = dep.as_str() |
| self.dep_type = default_dep_type |
| self.junction = None |
| self.strict = False |
| |
| elif type(dep) is MappingNode: |
| if default_dep_type: |
| (<MappingNode> dep).validate_keys(['filename', 'junction', 'strict']) |
| dep_type = default_dep_type |
| else: |
| (<MappingNode> dep).validate_keys(['filename', 'type', 'junction', 'strict']) |
| |
| # Make type optional, for this we set it to None |
| dep_type = (<MappingNode> dep).get_str(<str> Symbol.TYPE, None) |
| if dep_type is None or dep_type == <str> Symbol.ALL: |
| dep_type = None |
| elif dep_type not in [Symbol.BUILD, Symbol.RUNTIME]: |
| provenance = dep.get_scalar(Symbol.TYPE).get_provenance() |
| raise LoadError("{}: Dependency type '{}' is not 'build', 'runtime' or 'all'" |
| .format(provenance, dep_type), LoadErrorReason.INVALID_DATA) |
| |
| self.name = (<MappingNode> dep).get_str(<str> Symbol.FILENAME) |
| self.dep_type = dep_type |
| self.junction = (<MappingNode> dep).get_str(<str> Symbol.JUNCTION, None) |
| self.strict = (<MappingNode> dep).get_bool(<str> Symbol.STRICT, False) |
| |
| # Here we disallow explicitly setting 'strict' to False. |
| # |
| # This is in order to keep the door open to allowing the project.conf |
| # set the default of dependency 'strict'-ness which might be useful |
| # for projects which use mostly static linking and the like, in which |
| # case we can later interpret explicitly non-strict dependencies |
| # as an override of the project default. |
| # |
| if self.strict == False and Symbol.STRICT in dep: |
| provenance = dep.get_scalar(Symbol.STRICT).get_provenance() |
| raise LoadError("{}: Setting 'strict' to False is unsupported" |
| .format(provenance), LoadErrorReason.INVALID_DATA) |
| |
| else: |
| raise LoadError("{}: Dependency is not specified as a string or a dictionary".format(self.provenance), |
| LoadErrorReason.INVALID_DATA) |
| |
| # Only build dependencies are allowed to be strict |
| # |
| if self.strict and self.dep_type == Symbol.RUNTIME: |
| raise LoadError("{}: Runtime dependency {} specified as `strict`.".format(self.provenance, self.name), |
| LoadErrorReason.INVALID_DATA, |
| detail="Only dependencies required at build time may be declared `strict`.") |
| |
| # `:` characters are not allowed in filename if a junction was |
| # explicitly specified |
| if self.junction and ':' in self.name: |
| raise LoadError("{}: Dependency {} contains `:` in its name. " |
| "`:` characters are not allowed in filename when " |
| "junction attribute is specified.".format(self.provenance, self.name), |
| LoadErrorReason.INVALID_DATA) |
| |
| # Attempt to split name if no junction was specified explicitly |
| if not self.junction and ':' in self.name: |
| self.junction, self.name = self.name.rsplit(':', maxsplit=1) |
| |
| |
| # LoadElement(): |
| # |
| # A transient object breaking down what is loaded allowing us to |
| # do complex operations in multiple passes. |
| # |
| # Args: |
| # node (dict): A YAML loaded dictionary |
| # name (str): The element name |
| # loader (Loader): The Loader object for this element |
| # |
| cdef class LoadElement: |
| |
| cdef readonly MappingNode node |
| cdef readonly str name |
| cdef readonly str full_name |
| cdef readonly str kind |
| cdef int node_id |
| cdef readonly bint first_pass |
| cdef readonly object _loader |
| cdef readonly str link_target |
| cdef readonly ProvenanceInformation link_target_provenance |
| # TODO: if/when pyroaring exports symbols, we could type this statically |
| cdef object _dep_cache |
| cdef readonly list dependencies |
| |
| def __cinit__(self, MappingNode node, str filename, object loader): |
| |
| # |
| # Public members |
| # |
| self.kind = None # The Element kind |
| self.node = node # The YAML node |
| self.name = filename # The element name |
| self.full_name = None # The element full name (with associated junction) |
| self.node_id = _next_synthetic_counter() |
| self.link_target = None # The target of a link element |
| self.link_target_provenance = None # The provenance of the link target |
| |
| # |
| # Private members |
| # |
| self._loader = loader # The Loader object |
| self._dep_cache = None # The dependency cache, to speed up depends() |
| |
| # |
| # Initialization |
| # |
| if loader.project.junction: |
| # dependency is in subproject, qualify name |
| self.full_name = '{}:{}'.format(loader.project.junction._get_full_name(), self.name) |
| else: |
| # dependency is in top-level project |
| self.full_name = self.name |
| |
| self.dependencies = [] |
| |
| # Ensure the root node is valid |
| self.node.validate_keys([ |
| 'kind', 'depends', 'sources', 'sandbox', |
| 'variables', 'environment', 'environment-nocache', |
| 'config', 'public', 'description', |
| 'build-depends', 'runtime-depends', |
| ]) |
| |
| self.kind = node.get_str(Symbol.KIND, default=None) |
| self.first_pass = self.kind in ("junction", "link") |
| |
| # |
| # If this is a link, resolve it right away and just |
| # store the link target and provenance |
| # |
| if self.kind == 'link': |
| element = Element._new_from_load_element(self) |
| element._initialize_state() |
| |
| # Custom error for link dependencies, since we don't completely |
| # parse their dependencies we cannot rely on the built-in ElementError. |
| deps = extract_depends_from_node(self.node) |
| if deps: |
| raise LoadError( |
| "{}: Dependencies are forbidden for 'link' elements".format(element), |
| LoadErrorReason.LINK_FORBIDDEN_DEPENDENCIES |
| ) |
| |
| self.link_target = element.target |
| self.link_target_provenance = element.target_provenance |
| |
| # We don't count progress for junction elements or link |
| # as they do not represent real elements in the build graph. |
| # |
| # We check for a `None` kind, to avoid reporting progress for |
| # the virtual toplevel element used to load the pipeline. |
| # |
| if self._loader.load_context.task and self.kind is not None and not self.first_pass: |
| self._loader.load_context.task.add_current_progress() |
| |
| # provenance |
| # |
| # A property reporting the ProvenanceInformation of the element |
| # |
| @property |
| def provenance(self): |
| return self.node.get_provenance() |
| |
| # project |
| # |
| # A property reporting the Project in which this element resides. |
| # |
| @property |
| def project(self): |
| return self._loader.project |
| |
| # junction |
| # |
| # A property reporting the junction element accessing this |
| # element, if any. |
| # |
| @property |
| def junction(self): |
| return self._loader.project.junction |
| |
| # depends(): |
| # |
| # Checks if this element depends on another element, directly |
| # or indirectly. |
| # |
| # Args: |
| # other (LoadElement): Another LoadElement |
| # |
| # Returns: |
| # (bool): True if this LoadElement depends on 'other' |
| # |
| def depends(self, LoadElement other not None): |
| self._ensure_depends_cache() |
| return other.node_id in self._dep_cache |
| |
| ########################################### |
| # Private Methods # |
| ########################################### |
| cdef void _ensure_depends_cache(self): |
| cdef Dependency dep |
| |
| if self._dep_cache: |
| return |
| |
| self._dep_cache = BitMap() |
| |
| for dep in self.dependencies: |
| elt = dep.element |
| |
| # Ensure the cache of the element we depend on |
| elt._ensure_depends_cache() |
| |
| # We depend on this element |
| self._dep_cache.add(elt.node_id) |
| |
| # And we depend on everything this element depends on |
| self._dep_cache.update(elt._dep_cache) |
| |
| self._dep_cache = FrozenBitMap(self._dep_cache) |
| |
| |
| def _dependency_cmp(Dependency dep_a, Dependency dep_b): |
| cdef LoadElement element_a = dep_a.element |
| cdef LoadElement element_b = dep_b.element |
| |
| # Sort on inter element dependency first |
| if element_a.depends(element_b): |
| return 1 |
| elif element_b.depends(element_a): |
| return -1 |
| |
| # If there are no inter element dependencies, place |
| # runtime only dependencies last |
| if dep_a.dep_type != dep_b.dep_type: |
| if dep_a.dep_type == Symbol.RUNTIME: |
| return 1 |
| elif dep_b.dep_type == Symbol.RUNTIME: |
| return -1 |
| |
| # All things being equal, string comparison. |
| if element_a.name > element_b.name: |
| return 1 |
| elif element_a.name < element_b.name: |
| return -1 |
| |
| # Sort local elements before junction elements |
| # and use string comparison between junction elements |
| if element_a.junction and element_b.junction: |
| if element_a.junction > element_b.junction: |
| return 1 |
| elif element_a.junction < element_b.junction: |
| return -1 |
| elif element_a.junction: |
| return -1 |
| elif element_b.junction: |
| return 1 |
| |
| # This wont ever happen |
| return 0 |
| |
| |
| # sort_dependencies(): |
| # |
| # Sort dependencies of each element by their dependencies, |
| # so that direct dependencies which depend on other direct |
| # dependencies (directly or indirectly) appear later in the |
| # list. |
| # |
| # This avoids the need for performing multiple topological |
| # sorts throughout the build process. |
| # |
| # Args: |
| # element (LoadElement): The element to sort |
| # visited (set): a list of elements that should not be treated because |
| # because they already have been treated. |
| # This is useful when wanting to sort dependencies of |
| # multiple top level elements that might have a common |
| # part. |
| # |
| def sort_dependencies(LoadElement element, set visited): |
| cdef list working_elements = [element] |
| cdef Dependency dep |
| |
| if element in visited: |
| return |
| |
| visited.add(element) |
| |
| # Now dependency sort, we ensure that if any direct dependency |
| # directly or indirectly depends on another direct dependency, |
| # it is found later in the list. |
| while working_elements: |
| element = working_elements.pop() |
| for dep in element.dependencies: |
| if dep.element not in visited: |
| visited.add(dep.element) |
| working_elements.append(dep.element) |
| |
| element.dependencies.sort(key=cmp_to_key(_dependency_cmp)) |
| |
| |
| # _extract_depends_from_node(): |
| # |
| # Helper for extract_depends_from_node to get dependencies of a particular type |
| # |
| # Adds to an array of Dependency objects from a given dict node 'node', |
| # allows both strings and dicts for expressing the dependency. |
| # |
| # After extracting depends, the symbol is deleted from the node |
| # |
| # Args: |
| # node (Node): A YAML loaded dictionary |
| # key (str): the key on the Node corresponding to the dependency type |
| # default_dep_type (str): type to give to the dependency |
| # acc (list): a list in which to add the loaded dependencies |
| # rundeps (dict): a dictionary mapping dependency (junction, name) to dependency for runtime deps |
| # builddeps (dict): a dictionary mapping dependency (junction, name) to dependency for build deps |
| # |
| cdef void _extract_depends_from_node(Node node, str key, str default_dep_type, list acc, dict rundeps, dict builddeps) except *: |
| cdef SequenceNode depends = node.get_sequence(key, []) |
| cdef Node dep_node |
| cdef tuple deptup |
| |
| for dep_node in depends: |
| dependency = Dependency() |
| dependency.load(dep_node, default_dep_type) |
| deptup = (dependency.junction, dependency.name) |
| if dependency.dep_type in [Symbol.BUILD, None]: |
| if deptup in builddeps: |
| raise LoadError("{}: Duplicate build dependency found at {}." |
| .format(dependency.provenance, builddeps[deptup].provenance), |
| LoadErrorReason.DUPLICATE_DEPENDENCY) |
| else: |
| builddeps[deptup] = dependency |
| if dependency.dep_type in [Symbol.RUNTIME, None]: |
| if deptup in rundeps: |
| raise LoadError("{}: Duplicate runtime dependency found at {}." |
| .format(dependency.provenance, rundeps[deptup].provenance), |
| LoadErrorReason.DUPLICATE_DEPENDENCY) |
| else: |
| rundeps[deptup] = dependency |
| acc.append(dependency) |
| |
| # Now delete the field, we dont want it anymore |
| node.safe_del(key) |
| |
| |
| # extract_depends_from_node(): |
| # |
| # Creates an array of Dependency objects from a given dict node 'node', |
| # allows both strings and dicts for expressing the dependency and |
| # throws a comprehensive LoadError in the case that the node is malformed. |
| # |
| # After extracting depends, the symbol is deleted from the node |
| # |
| # Args: |
| # node (Node): A YAML loaded dictionary |
| # |
| # Returns: |
| # (list): a list of Dependency objects |
| # |
| def extract_depends_from_node(Node node): |
| cdef list acc = [] |
| cdef dict rundeps = {} |
| cdef dict builddeps = {} |
| _extract_depends_from_node(node, <str> Symbol.BUILD_DEPENDS, <str> Symbol.BUILD, acc, rundeps, builddeps) |
| _extract_depends_from_node(node, <str> Symbol.RUNTIME_DEPENDS, <str> Symbol.RUNTIME, acc, rundeps, builddeps) |
| _extract_depends_from_node(node, <str> Symbol.DEPENDS, None, acc, rundeps, builddeps) |
| return acc |
