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Source code for galaxy.tools.deps.resolvers

"""The module defines the abstract interface for dealing tool dependency resolution plugins."""
from abc import (
    ABCMeta,
    abstractmethod,
    abstractproperty,
)

import six
import yaml

from galaxy.util import listify
from galaxy.util.dictifiable import Dictifiable

from ..requirements import ToolRequirement


[docs]@six.add_metaclass(ABCMeta) class DependencyResolver(Dictifiable, object): """Abstract description of a technique for resolving container images for tool execution.""" # Keys for dictification. dict_collection_visible_keys = ['resolver_type', 'resolves_simple_dependencies', 'can_uninstall_dependencies'] # A "simple" dependency is one that does not depend on the the tool # resolving the dependency. Classic tool shed dependencies are non-simple # because the repository install context is used in dependency resolution # so the same requirement tags in different tools will have very different # resolution. disabled = False resolves_simple_dependencies = True can_uninstall_dependencies = False config_options = {}
[docs] @abstractmethod def resolve(self, requirement, **kwds): """Given inputs describing dependency in the abstract yield a Dependency object. The Dependency object describes various attributes (script, bin, version) used to build scripts with the dependency availble. Here script is the env.sh file to source before running a job, if that is not found the bin directory will be appended to the path (if it is not ``None``). Finally, version is the resolved tool dependency version (which may differ from requested version for instance if the request version is 'default'.) """
[docs]class MultipleDependencyResolver: """Variant of DependencyResolver that can optionally resolve multiple dependencies together."""
[docs] @abstractmethod def resolve_all(self, requirements, **kwds): """ Given multiple requirements yields a list of Dependency objects if and only if they may all be resolved together. Unsuccessfull attempts should return an empty list. :param requirements: list of tool requirements :param type: [ToolRequirement] or ToolRequirements :returns: list of resolved dependencies :rtype: [Dependency] """
[docs]@six.add_metaclass(ABCMeta) class ListableDependencyResolver: """ Mix this into a ``DependencyResolver`` and implement to indicate the dependency resolver can iterate over its dependencies and generate requirements. """
[docs] @abstractmethod def list_dependencies(self): """ List the "simple" requirements that may be resolved "exact"-ly by this dependency resolver. """
def _to_requirement(self, name, version=None): return ToolRequirement(name=name, type="package", version=version)
[docs]class MappableDependencyResolver: """Mix this into a ``DependencyResolver`` to allow mapping files. Mapping files allow adapting generic requirements to specific local implementations. """ def _setup_mapping(self, dependency_manager, **kwds): mapping_files = dependency_manager.get_resolver_option(self, "mapping_files", explicit_resolver_options=kwds) mappings = [] if mapping_files: mapping_files = listify(mapping_files) for mapping_file in mapping_files: mappings.extend(MappableDependencyResolver._mapping_file_to_list(mapping_file)) self._mappings = mappings @staticmethod def _mapping_file_to_list(mapping_file): with open(mapping_file, "r") as f: raw_mapping = yaml.safe_load(f) or [] return map(RequirementMapping.from_dict, raw_mapping) def _expand_mappings(self, requirement): for mapping in self._mappings: if mapping.matches_requirement(requirement): requirement = mapping.apply(requirement) break return requirement
FROM_UNVERSIONED = object()
[docs]class RequirementMapping(object):
[docs] def __init__(self, from_name, from_version, to_name, to_version): self.from_name = from_name self.from_version = from_version self.to_name = to_name self.to_version = to_version
[docs] def matches_requirement(self, requirement): """Check if supplied ToolRequirement matches this mapping description. For it to match - the names must match. Additionally if the requirement is created with a version or with unversioned being set to True additional checks are needed. If a version is specified, it must match the supplied version exactly. If ``unversioned`` is True, then the supplied requirement must be unversioned (i.e. its version must be set to ``None``). """ if requirement.name != self.from_name: return False elif self.from_version is None: return True elif self.from_version is FROM_UNVERSIONED: return requirement.version is None else: return requirement.version == self.from_version
[docs] def apply(self, requirement): requirement = requirement.copy() requirement.name = self.to_name if self.to_version is not None: requirement.version = self.to_version return requirement
[docs] @staticmethod def from_dict(raw_mapping): from_raw = raw_mapping.get("from") if isinstance(from_raw, dict): from_name = from_raw.get("name") raw_version = from_raw.get("version", None) unversioned = from_raw.get("unversioned", False) if unversioned and raw_version: raise Exception("Cannot define both version and set unversioned to True.") if unversioned: from_version = FROM_UNVERSIONED else: from_version = str(raw_version) if raw_version is not None else raw_version else: from_name = from_raw from_version = None to_raw = raw_mapping.get("to") if isinstance(to_raw, dict): to_name = to_raw.get("name", from_name) to_version = str(to_raw.get("version")) else: to_name = to_raw to_version = None return RequirementMapping(from_name, from_version, to_name, to_version)
[docs]@six.add_metaclass(ABCMeta) class SpecificationAwareDependencyResolver: """Mix this into a :class:`DependencyResolver` to implement URI specification matching. Allows adapting generic requirements to more specific URIs - to tailor name or version to specified resolution system. """ @abstractmethod def _expand_specs(self, requirement): """Find closest matching specification for discovered resolver and return new concrete requirement."""
[docs]class SpecificationPatternDependencyResolver: """Implement the :class:`SpecificationAwareDependencyResolver` with a regex pattern.""" @abstractproperty def _specification_pattern(self): """Pattern of URI to match against.""" def _find_specification(self, specs): pattern = self._specification_pattern for spec in specs: if pattern.match(spec.uri): return spec return None def _expand_specs(self, requirement): name = requirement.name version = requirement.version specs = requirement.specs spec = self._find_specification(specs) if spec is not None: name = spec.short_name version = spec.version or version requirement = requirement.copy() requirement.name = name requirement.version = version return requirement
[docs]@six.add_metaclass(ABCMeta) class InstallableDependencyResolver: """ Mix this into a ``DependencyResolver`` and implement to indicate the dependency resolver can attempt to install new dependencies. """
[docs] @abstractmethod def install_dependency(self, name, version, type, **kwds): """ Attempt to install this dependency if a recipe to do so has been registered in some way. """
[docs]@six.add_metaclass(ABCMeta) class Dependency(Dictifiable, object): dict_collection_visible_keys = ['dependency_type', 'exact', 'name', 'version', 'cacheable'] cacheable = False
[docs] @abstractmethod def shell_commands(self, requirement): """ Return shell commands to enable this dependency. """
@abstractproperty def exact(self): """ Return true if version information wasn't discarded to resolve the dependency. """ @property def resolver_msg(self): """ Return a message describing this dependency """ return "Using dependency %s version %s of type %s" % (self.name, self.version, self.dependency_type)
[docs]class NullDependency(Dependency): dependency_type = None exact = True
[docs] def __init__(self, version=None, name=None): self.version = version self.name = name
@property def resolver_msg(self): """ Return a message describing this dependency """ return "Dependency %s not found." % self.name
[docs] def shell_commands(self, requirement): return None
[docs]class DependencyException(Exception): pass