diff options
Diffstat (limited to 'lib/spack/spack/spec.py')
| -rw-r--r-- | lib/spack/spack/spec.py | 141 |
1 files changed, 116 insertions, 25 deletions
diff --git a/lib/spack/spack/spec.py b/lib/spack/spack/spec.py index c045e80365..d04135860e 100644 --- a/lib/spack/spack/spec.py +++ b/lib/spack/spack/spec.py @@ -353,7 +353,7 @@ class VariantMap(HashableMap): @property def concrete(self): return self.spec._concrete or all( - v in self for v in self.spec.package.variants) + v in self for v in self.spec.package_class.variants) def copy(self): @@ -418,9 +418,11 @@ class Spec(object): # cases we've read them from a file want to assume normal. # This allows us to manipulate specs that Spack doesn't have # package.py files for. - self._normal = kwargs.get('normal', False) + self._normal = kwargs.get('normal', False) self._concrete = kwargs.get('concrete', False) - self.external = None + + # Allow a spec to be constructed with an external path. + self.external = kwargs.get('external', None) # This allows users to construct a spec DAG with literals. # Note that given two specs a and b, Spec(a) copies a, but @@ -499,6 +501,14 @@ class Spec(object): @property + def package_class(self): + """Internal package call gets only the class object for a package. + Use this to just get package metadata. + """ + return spack.repo.get_pkg_class(self.name) + + + @property def virtual(self): """Right now, a spec is virtual if no package exists with its name. @@ -786,8 +796,30 @@ class Spec(object): """Replace this virtual spec with a concrete spec.""" assert(self.virtual) for name, dependent in self.dependents.items(): + # remove self from all dependents. + del dependent.dependencies[self.name] + + # add the replacement, unless it is already a dep of dependent. + if concrete.name not in dependent.dependencies: + dependent._add_dependency(concrete) + + + def _replace_node(self, replacement): + """Replace this spec with another. + + Connects all dependents of this spec to its replacement, and + disconnects this spec from any dependencies it has. New spec + will have any dependencies the replacement had, and may need + to be normalized. + + """ + for name, dependent in self.dependents.items(): del dependent.dependencies[self.name] - dependent._add_dependency(concrete) + dependent._add_dependency(replacement) + + for name, dep in self.dependencies.items(): + del dep.dependents[self.name] + del self.dependencies[dep.name] def _expand_virtual_packages(self): @@ -807,18 +839,80 @@ class Spec(object): this are infrequent, but should implement this before it is a problem. """ + # Make an index of stuff this spec already provides + self_index = ProviderIndex(self.traverse(), restrict=True) + changed = False done = False while not done: done = True for spec in list(self.traverse()): - if spack.concretizer.concretize_virtual_and_external(spec): - done = False + replacement = None + if spec.virtual: + replacement = self._find_provider(spec, self_index) + if replacement: + # TODO: may break if in-place on self but + # shouldn't happen if root is traversed first. + spec._replace_with(replacement) + done=False + break + + if not replacement: + # Get a list of possible replacements in order of preference. + candidates = spack.concretizer.choose_virtual_or_external(spec) + + # Try the replacements in order, skipping any that cause + # satisfiability problems. + for replacement in candidates: + if replacement is spec: + break + + # Replace spec with the candidate and normalize + copy = self.copy() + copy[spec.name]._dup(replacement.copy(deps=False)) + + try: + # If there are duplicate providers or duplicate provider + # deps, consolidate them and merge constraints. + copy.normalize(force=True) + break + except SpecError as e: + # On error, we'll try the next replacement. + continue + + # If replacement is external then trim the dependencies + if replacement.external: + if (spec.dependencies): + changed = True + spec.dependencies = DependencyMap() + replacement.dependencies = DependencyMap() + + # TODO: could this and the stuff in _dup be cleaned up? + def feq(cfield, sfield): + return (not cfield) or (cfield == sfield) + + if replacement is spec or (feq(replacement.name, spec.name) and + feq(replacement.versions, spec.versions) and + feq(replacement.compiler, spec.compiler) and + feq(replacement.architecture, spec.architecture) and + feq(replacement.dependencies, spec.dependencies) and + feq(replacement.variants, spec.variants) and + feq(replacement.external, spec.external)): + continue + + # Refine this spec to the candidate. This uses + # replace_with AND dup so that it can work in + # place. TODO: make this more efficient. + if spec.virtual: + spec._replace_with(replacement) + changed = True + if spec._dup(replacement, deps=False, cleardeps=False): changed = True - # If there are duplicate providers or duplicate provider deps, this - # consolidates them and merge constraints. - changed |= self.normalize(force=True) + self_index.update(spec) + done=False + break + return changed @@ -842,7 +936,7 @@ class Spec(object): force = False while changed: - changes = (self.normalize(force=force), + changes = (self.normalize(force), self._expand_virtual_packages(), self._concretize_helper()) changed = any(changes) @@ -968,8 +1062,8 @@ class Spec(object): def _find_provider(self, vdep, provider_index): """Find provider for a virtual spec in the provider index. - Raise an exception if there is a conflicting virtual - dependency already in this spec. + Raise an exception if there is a conflicting virtual + dependency already in this spec. """ assert(vdep.virtual) providers = provider_index.providers_for(vdep) @@ -1010,17 +1104,14 @@ class Spec(object): """ changed = False - # If it's a virtual dependency, try to find a provider and - # merge that. + # If it's a virtual dependency, try to find an existing + # provider in the spec, and merge that. if dep.virtual: visited.add(dep.name) provider = self._find_provider(dep, provider_index) if provider: dep = provider - else: - # if it's a real dependency, check whether it provides - # something already required in the spec. index = ProviderIndex([dep], restrict=True) for vspec in (v for v in spec_deps.values() if v.virtual): if index.providers_for(vspec): @@ -1117,13 +1208,14 @@ class Spec(object): # Get all the dependencies into one DependencyMap spec_deps = self.flat_dependencies(copy=False) - # Initialize index of virtual dependency providers - index = ProviderIndex(spec_deps.values(), restrict=True) + # Initialize index of virtual dependency providers if + # concretize didn't pass us one already + provider_index = ProviderIndex(spec_deps.values(), restrict=True) # traverse the package DAG and fill out dependencies according # to package files & their 'when' specs visited = set() - any_change = self._normalize_helper(visited, spec_deps, index) + any_change = self._normalize_helper(visited, spec_deps, provider_index) # If there are deps specified but not visited, they're not # actually deps of this package. Raise an error. @@ -1161,7 +1253,7 @@ class Spec(object): # Ensure that variants all exist. for vname, variant in spec.variants.items(): - if vname not in spec.package.variants: + if vname not in spec.package_class.variants: raise UnknownVariantError(spec.name, vname) @@ -1402,13 +1494,12 @@ class Spec(object): Whether deps should be copied too. Set to false to copy a spec but not its dependencies. """ - # We don't count dependencies as changes here changed = True if hasattr(self, 'name'): - changed = (self.name != other.name and self.versions != other.versions and \ - self.architecture != other.architecture and self.compiler != other.compiler and \ - self.variants != other.variants and self._normal != other._normal and \ + changed = (self.name != other.name and self.versions != other.versions and + self.architecture != other.architecture and self.compiler != other.compiler and + self.variants != other.variants and self._normal != other._normal and self.concrete != other.concrete and self.external != other.external) # Local node attributes get copied first. |