def constrain()

in lib/ramble/spack/spec.py [0:0]

• 65 lines of code
• 46 McCabe index (conditional complexity)

    def constrain(self, other, deps=True):
        """Merge the constraints of other with self.

        Returns True if the spec changed as a result, False if not.
        """
        # If we are trying to constrain a concrete spec, either the spec
        # already satisfies the constraint (and the method returns False)
        # or it raises an exception
        if self.concrete:
            if self.satisfies(other):
                return False
            else:
                raise spack.error.UnsatisfiableSpecError(
                    self, other, 'constrain a concrete spec'
                )

        other = self._autospec(other)

        if not (self.name == other.name or
                (not self.name) or
                (not other.name)):
            raise UnsatisfiableSpecNameError(self.name, other.name)

        if (other.namespace is not None and
                self.namespace is not None and
                other.namespace != self.namespace):
            raise UnsatisfiableSpecNameError(self.fullname, other.fullname)

        if not self.versions.overlaps(other.versions):
            raise UnsatisfiableVersionSpecError(self.versions, other.versions)

        for v in [x for x in other.variants if x in self.variants]:
            if not self.variants[v].compatible(other.variants[v]):
                raise vt.UnsatisfiableVariantSpecError(
                    self.variants[v], other.variants[v]
                )

        # TODO: Check out the logic here
        sarch, oarch = self.architecture, other.architecture
        if sarch is not None and oarch is not None:
            if sarch.platform is not None and oarch.platform is not None:
                if sarch.platform != oarch.platform:
                    raise UnsatisfiableArchitectureSpecError(sarch, oarch)
            if sarch.os is not None and oarch.os is not None:
                if sarch.os != oarch.os:
                    raise UnsatisfiableArchitectureSpecError(sarch, oarch)
            if sarch.target is not None and oarch.target is not None:
                if sarch.target != oarch.target:
                    raise UnsatisfiableArchitectureSpecError(sarch, oarch)

        changed = False

        if not self.name and other.name:
            self.name = other.name
            changed = True

        if not self.namespace and other.namespace:
            self.namespace = other.namespace
            changed = True

        if self.compiler is not None and other.compiler is not None:
            changed |= self.compiler.constrain(other.compiler)
        elif self.compiler is None:
            changed |= (self.compiler != other.compiler)
            self.compiler = other.compiler

        changed |= self.versions.intersect(other.versions)
        changed |= self.variants.constrain(other.variants)

        changed |= self.compiler_flags.constrain(other.compiler_flags)

        old = str(self.architecture)
        sarch, oarch = self.architecture, other.architecture
        if sarch is None or other.architecture is None:
            self.architecture = sarch or oarch
        else:
            if sarch.platform is None or oarch.platform is None:
                self.architecture.platform = sarch.platform or oarch.platform
            if sarch.os is None or oarch.os is None:
                sarch.os = sarch.os or oarch.os
            if sarch.target is None or oarch.target is None:
                sarch.target = sarch.target or oarch.target
        changed |= (str(self.architecture) != old)

        if deps:
            changed |= self._constrain_dependencies(other)

        return changed