diff options
Diffstat (limited to 'lib')
-rw-r--r-- | lib/spack/spack/cmd/solve.py | 3 | ||||
-rw-r--r-- | lib/spack/spack/solver/asp.py | 17 | ||||
-rw-r--r-- | lib/spack/spack/solver/concretize.lp | 39 |
3 files changed, 49 insertions, 10 deletions
diff --git a/lib/spack/spack/cmd/solve.py b/lib/spack/spack/cmd/solve.py index 0cd11f5507..3f4787fdad 100644 --- a/lib/spack/spack/cmd/solve.py +++ b/lib/spack/spack/cmd/solve.py @@ -16,6 +16,7 @@ import spack.cmd import spack.cmd.common.arguments as arguments import spack.package import spack.solver.asp as asp +from spack.util.string import plural description = "concretize a specs using an ASP solver" section = 'developer' @@ -103,7 +104,7 @@ def solve(parser, args): opt, i, answer = best if not args.yaml: tty.msg("Best of %d answers." % (i + 1)) - tty.msg("Optimization %s" % opt) + tty.msg("Optimization: %s" % opt) # iterate over roots from command line for spec in specs: diff --git a/lib/spack/spack/solver/asp.py b/lib/spack/spack/solver/asp.py index 080a685584..500d34845b 100644 --- a/lib/spack/spack/solver/asp.py +++ b/lib/spack/spack/solver/asp.py @@ -346,6 +346,10 @@ class AspGenerator(object): # dependencies for name, conditions in pkg.dependencies.items(): for cond, dep in conditions.items(): + named_cond = cond.copy() + if not named_cond.name: + named_cond.name = pkg.name + if cond == spack.spec.Spec(): for t in dep.type: self.fact( @@ -354,9 +358,6 @@ class AspGenerator(object): ) ) else: - named_cond = cond.copy() - if not named_cond.name: - named_cond.name = pkg.name for t in dep.type: self.rule( fn.declared_dependency( @@ -367,6 +368,16 @@ class AspGenerator(object): ) ) + # add constraints on the dependency from dep spec. + for clause in self.spec_clauses(dep.spec): + self.rule( + clause, + self._and( + fn.depends_on(dep.pkg.name, dep.spec.name), + *self.spec_clauses(named_cond, body=True) + ) + ) + # virtual preferences self.virtual_preferences( pkg.name, diff --git a/lib/spack/spack/solver/concretize.lp b/lib/spack/spack/solver/concretize.lp index 97ed4ea82e..2b8baadc5d 100644 --- a/lib/spack/spack/solver/concretize.lp +++ b/lib/spack/spack/solver/concretize.lp @@ -17,7 +17,6 @@ version_declared(P, V) :- version_declared(P, V, _). version_possible(P, V) :- version_declared(P, V), not version_conflict(P, V). version_weight(P, V, N) :- version(P, V), version_declared(P, V, N). -#minimize{ N@3,P,V : version_weight(P, V, N) }. #defined version_conflict/2. @@ -54,9 +53,6 @@ provider_weight(D, 100) not pkg_provider_preference(P, V, D, _), not default_provider_preference(V, D, _). -% pick most preferred virtual providers -#minimize{ N@2,D : provider_weight(D, N) }. - % all nodes must be reachable from some root needed(D) :- root(D), node(D). needed(D) :- root(P), depends_on(P, D). @@ -100,8 +96,6 @@ variant_not_default(P, V, X, 0) variant_default_value(P, V, X), node(P). -#minimize { N@1,P,V,X : variant_not_default(P, V, X, N) }. - % suppress wranings about this atom being unset. It's only set if some % spec or some package sets it, and without this, clingo will give % warnings like 'info: atom does not occur in any rule head'. @@ -187,3 +181,36 @@ node_compiler_set(D, C) node_compiler_version_set(D, C, V) :- node(D), compiler(C), depends_on(P, D), node_compiler(D, C), node_compiler_version_set(P, C, V). + + +%----------------------------------------------------------------------------- +% How to optimize the spec (high to low priority) +%----------------------------------------------------------------------------- +% weight root preferences higher +% +% TODO: how best to deal with this issue? It's not clear how best to +% weight all the constraints. Without this root preference, `spack solve +% hdf5` will pick mpich instead of openmpi, even if openmpi is the +% preferred provider, because openmpi has a version constraint on hwloc. +% It ends up choosing between settling for an old version of hwloc, or +% picking the second-best provider. This workaround weights root +% preferences higher so that hdf5's prefs are more important, but it's +% not clear this is a general solution. It would be nice to weight by +% distance to root, but that seems to slow down the solve a lot. +% +% One option is to make preferences hard constraints. Or maybe we need +% to look more closely at where a constraint came from and factor that +% into our weights. e.g., a non-default variant resulting from a version +% constraint counts like a version constraint. Needs more thought later. +% +root(D, 2) :- root(D), node(D). +root(D, 1) :- not root(D), node(D). + +% pick most preferred virtual providers +#minimize{ N*R@3,D : provider_weight(D, N), root(P, R) }. + +% prefer default variants +#minimize { N*R@2,P,V,X : variant_not_default(P, V, X, N), root(P, R) }. + +% prefer more recent versions. +#minimize{ N@1,P,V : version_weight(P, V, N) }. |