ASP-based solver: add a generic rule for propagation (#44870)
This adds a generic propagate/2 rule to propagate any fact to children in the DAG.
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2 changed files with 44 additions and 41 deletions
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@ -1878,11 +1878,8 @@ def _spec_clauses(
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)
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clauses.append(f.variant_value(spec.name, vname, value))
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if variant.propagate:
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clauses.append(
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f.variant_propagation_candidate(spec.name, vname, value, spec.name)
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)
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clauses.append(f.propagate(spec.name, fn.variant_value(vname, value)))
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# Tell the concretizer that this is a possible value for the
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# variant, to account for things like int/str values where we
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@ -2737,7 +2734,7 @@ class _Head:
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node_flag = fn.attr("node_flag_set")
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node_flag_source = fn.attr("node_flag_source")
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node_flag_propagate = fn.attr("node_flag_propagate")
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variant_propagation_candidate = fn.attr("variant_propagation_candidate")
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propagate = fn.attr("propagate")
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class _Body:
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@ -2754,7 +2751,7 @@ class _Body:
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node_flag = fn.attr("node_flag")
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node_flag_source = fn.attr("node_flag_source")
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node_flag_propagate = fn.attr("node_flag_propagate")
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variant_propagation_candidate = fn.attr("variant_propagation_candidate")
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propagate = fn.attr("propagate")
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class ProblemInstanceBuilder:
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@ -811,37 +811,6 @@ node_has_variant(node(ID, Package), Variant) :-
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pkg_fact(Package, variant(Variant)),
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attr("node", node(ID, Package)).
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% Variant propagation is forwarded to dependencies
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attr("variant_propagation_candidate", PackageNode, Variant, Value, Source) :-
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attr("node", PackageNode),
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depends_on(ParentNode, PackageNode),
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attr("variant_value", node(_, Source), Variant, Value),
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attr("variant_propagation_candidate", ParentNode, Variant, _, Source).
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% If the node is a candidate, and it has the variant and value,
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% then those variant and value should be propagated
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attr("variant_propagate", node(ID, Package), Variant, Value, Source) :-
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attr("variant_propagation_candidate", node(ID, Package), Variant, Value, Source),
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node_has_variant(node(ID, Package), Variant),
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pkg_fact(Package, variant_possible_value(Variant, Value)),
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not attr("variant_set", node(ID, Package), Variant).
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% Propagate the value, if there is the corresponding attribute
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attr("variant_value", PackageNode, Variant, Value) :- attr("variant_propagate", PackageNode, Variant, Value, _).
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% If a variant is propagated, we cannot have extraneous values (this is for multi valued variants)
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variant_is_propagated(PackageNode, Variant) :- attr("variant_propagate", PackageNode, Variant, _, _).
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:- variant_is_propagated(PackageNode, Variant),
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attr("variant_value", PackageNode, Variant, Value),
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not attr("variant_propagate", PackageNode, Variant, Value, _).
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% Cannot receive different values from different sources on the same variant
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error(100, "{0} and {1} cannot both propagate variant '{2}' to package {3} with values '{4}' and '{5}'", Source1, Source2, Variant, Package, Value1, Value2) :-
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attr("variant_propagate", node(X, Package), Variant, Value1, Source1),
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attr("variant_propagate", node(X, Package), Variant, Value2, Source2),
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node_has_variant(node(X, Package), Variant),
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Value1 < Value2, Source1 < Source2.
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% a variant cannot be set if it is not a variant on the package
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error(100, "Cannot set variant '{0}' for package '{1}' because the variant condition cannot be satisfied for the given spec", Variant, Package)
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:- attr("variant_set", node(X, Package), Variant),
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@ -919,7 +888,7 @@ variant_not_default(node(ID, Package), Variant, Value)
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% variants set explicitly on the CLI don't count as non-default
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not attr("variant_set", node(ID, Package), Variant, Value),
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% variant values forced by propagation don't count as non-default
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not attr("variant_propagate", node(ID, Package), Variant, Value, _),
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not propagate(node(ID, Package), variant_value(Variant, Value)),
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% variants set on externals that we could use don't count as non-default
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% this makes spack prefer to use an external over rebuilding with the
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% default configuration
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@ -932,7 +901,7 @@ variant_default_not_used(node(ID, Package), Variant, Value)
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:- variant_default_value(Package, Variant, Value),
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node_has_variant(node(ID, Package), Variant),
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not attr("variant_value", node(ID, Package), Variant, Value),
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not attr("variant_propagate", node(ID, Package), Variant, _, _),
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not propagate(node(ID, Package), variant_value(Variant, _)),
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attr("node", node(ID, Package)).
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% The variant is set in an external spec
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@ -989,6 +958,43 @@ pkg_fact(Package, variant_single_value("dev_path"))
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#defined variant_default_value/3.
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#defined variant_default_value_from_packages_yaml/3.
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%-----------------------------------------------------------------------------
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% Propagation semantics
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%-----------------------------------------------------------------------------
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% Propagation roots have a corresponding attr("propagate", ...)
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propagate(RootNode, PropagatedAttribute) :- attr("propagate", RootNode, PropagatedAttribute).
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% Propagate an attribute along edges to child nodes
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propagate(ChildNode, PropagatedAttribute) :-
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propagate(ParentNode, PropagatedAttribute),
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depends_on(ParentNode, ChildNode).
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%-----------------------------------------------------------------------------
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% Activation of propagated values
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%-----------------------------------------------------------------------------
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%----
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% Variants
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%----
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% If a variant is propagated, and can be accepted, set its value
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attr("variant_value", node(ID, Package), Variant, Value) :-
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propagate(node(ID, Package), variant_value(Variant, Value)),
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node_has_variant(node(ID, Package), Variant),
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pkg_fact(Package, variant_possible_value(Variant, Value)),
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not attr("variant_set", node(ID, Package), Variant).
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% If a variant is propagated, we cannot have extraneous values
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variant_is_propagated(PackageNode, Variant) :-
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attr("variant_value", PackageNode, Variant, Value),
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propagate(PackageNode, variant_value(Variant, Value)),
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not attr("variant_set", PackageNode, Variant).
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:- variant_is_propagated(PackageNode, Variant),
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attr("variant_value", PackageNode, Variant, Value),
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not propagate(PackageNode, variant_value(Variant, Value)).
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%-----------------------------------------------------------------------------
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% Platform semantics
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%-----------------------------------------------------------------------------
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@ -1496,7 +1502,7 @@ opt_criterion(45, "preferred providers (non-roots)").
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}.
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% Try to minimize the number of compiler mismatches in the DAG.
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opt_criterion(40, "compiler mismatches that are not from CLI").
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opt_criterion(40, "compiler mismatches that are not required").
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#minimize{ 0@240: #true }.
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#minimize{ 0@40: #true }.
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#minimize{
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@ -1506,7 +1512,7 @@ opt_criterion(40, "compiler mismatches that are not from CLI").
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not runtime(Dependency)
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}.
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opt_criterion(39, "compiler mismatches that are not from CLI").
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opt_criterion(39, "compiler mismatches that are required").
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#minimize{ 0@239: #true }.
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#minimize{ 0@39: #true }.
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#minimize{
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