private void visitRule(
Rule rule,
AspectDefinition aspect,
AspectParameters aspectParameters,
ListMultimap<Attribute, LabelAndConfiguration> labelMap,
ListMultimap<Attribute, Dependency> outgoingEdges) {
Preconditions.checkNotNull(labelMap);
for (Map.Entry<Attribute, Collection<LabelAndConfiguration>> entry :
labelMap.asMap().entrySet()) {
Attribute attribute = entry.getKey();
for (LabelAndConfiguration dep : entry.getValue()) {
Label label = dep.getLabel();
BuildConfiguration config = dep.getConfiguration();
Target toTarget;
try {
toTarget = getTarget(label);
} catch (NoSuchThingException e) {
throw new IllegalStateException(
"not found: " + label + " from " + rule + " in " + attribute.getName());
}
if (toTarget == null) {
continue;
}
BuildConfiguration.TransitionApplier transitionApplier = config.getTransitionApplier();
if (config.useDynamicConfigurations()
&& config.isHostConfiguration()
&& !BuildConfiguration.usesNullConfiguration(toTarget)) {
// This condition is needed because resolveLateBoundAttributes may switch config to
// the host configuration, which is the only case DependencyResolver applies a
// configuration transition outside of this method. We need to reflect that
// transition in the results of this method, but config.evaluateTransition is hard-set
// to return a NONE transition when the input is a host config. Since the outside
// caller originally passed the *original* value of config (before the possible
// switch), it can mistakenly interpret the result as a NONE transition from the
// original value of config. This condition fixes that. Another fix would be to have
// config.evaluateTransition return a HOST transition when the input config is a host,
// but since this blemish is specific to DependencyResolver it seems best to keep the
// fix here.
// TODO(bazel-team): eliminate this special case by passing transitionApplier to
// resolveLateBoundAttributes, so that method uses the same interface for transitions.
transitionApplier.applyTransition(Attribute.ConfigurationTransition.HOST);
} else {
config.evaluateTransition(rule, attribute, toTarget, transitionApplier);
}
for (Dependency dependency :
transitionApplier.getDependencies(
label, requiredAspects(aspect, aspectParameters, attribute, toTarget, rule))) {
outgoingEdges.put(entry.getKey(), dependency);
}
}
}
}
private void resolveExplicitAttributes(
Rule rule,
final BuildConfiguration configuration,
AttributeMap attributes,
final ImmutableSortedKeyListMultimap.Builder<Attribute, LabelAndConfiguration> builder) {
attributes.visitLabels(
new AttributeMap.AcceptsLabelAttribute() {
@Override
public void acceptLabelAttribute(Label label, Attribute attribute) {
String attributeName = attribute.getName();
if (attributeName.equals("abi_deps")) {
// abi_deps is handled specially: we visit only the branch that
// needs to be taken based on the configuration.
return;
}
if (attribute.getType() == BuildType.NODEP_LABEL) {
return;
}
if (attribute.isImplicit() || attribute.isLateBound()) {
return;
}
builder.put(attribute, LabelAndConfiguration.of(label, configuration));
}
});
// TODO(bazel-team): Remove this in favor of the new configurable attributes.
if (attributes.getAttributeDefinition("abi_deps") != null) {
Attribute depsAttribute = attributes.getAttributeDefinition("deps");
MakeVariableExpander.Context context =
new ConfigurationMakeVariableContext(rule.getPackage(), configuration);
String abi = null;
try {
abi = MakeVariableExpander.expand(attributes.get("abi", Type.STRING), context);
} catch (MakeVariableExpander.ExpansionException e) {
// Ignore this. It will be handled during the analysis phase.
}
if (abi != null) {
for (Map.Entry<String, List<Label>> entry :
attributes.get("abi_deps", BuildType.LABEL_LIST_DICT).entrySet()) {
try {
if (Pattern.matches(entry.getKey(), abi)) {
for (Label label : entry.getValue()) {
builder.put(depsAttribute, LabelAndConfiguration.of(label, configuration));
}
}
} catch (PatternSyntaxException e) {
// Ignore this. It will be handled during the analysis phase.
}
}
}
}
}
private void resolveImplicitAttributes(
Rule rule,
BuildConfiguration configuration,
AttributeMap attributeMap,
Iterable<Attribute> attributes,
ImmutableSortedKeyListMultimap.Builder<Attribute, LabelAndConfiguration> builder) {
// Since the attributes that come from aspects do not appear in attributeMap, we have to get
// their values from somewhere else. This incidentally means that aspects attributes are not
// configurable. It would be nice if that wasn't the case, but we'd have to revamp how
// attribute mapping works, which is a large chunk of work.
ImmutableSet<String> mappedAttributes = ImmutableSet.copyOf(attributeMap.getAttributeNames());
for (Attribute attribute : attributes) {
if (!attribute.isImplicit() || !attribute.getCondition().apply(attributeMap)) {
continue;
}
if (attribute.getType() == BuildType.LABEL) {
Label label =
mappedAttributes.contains(attribute.getName())
? attributeMap.get(attribute.getName(), BuildType.LABEL)
: BuildType.LABEL.cast(attribute.getDefaultValue(rule));
if (label != null) {
builder.put(attribute, LabelAndConfiguration.of(label, configuration));
}
} else if (attribute.getType() == BuildType.LABEL_LIST) {
List<Label> labelList =
mappedAttributes.contains(attribute.getName())
? attributeMap.get(attribute.getName(), BuildType.LABEL_LIST)
: BuildType.LABEL_LIST.cast(attribute.getDefaultValue(rule));
for (Label label : labelList) {
builder.put(attribute, LabelAndConfiguration.of(label, configuration));
}
}
}
}
/**
* Adds new dependencies to the given rule under the given attribute name
*
* @param result the builder for the attribute --> dependency labels map
* @param rule the rule being evaluated
* @param attrName the name of the attribute to add dependency labels to
* @param labels the dependencies to add
* @param configuration the configuration to apply to those dependencies
*/
private void addExplicitDeps(
ImmutableSortedKeyListMultimap.Builder<Attribute, LabelAndConfiguration> result,
Rule rule,
String attrName,
Iterable<Label> labels,
BuildConfiguration configuration) {
if (!rule.isAttrDefined(attrName, BuildType.LABEL_LIST)
&& !rule.isAttrDefined(attrName, BuildType.NODEP_LABEL_LIST)) {
return;
}
Attribute attribute = rule.getRuleClassObject().getAttributeByName(attrName);
for (Label label : labels) {
// The configuration must be the configuration after the first transition step (applying
// split configurations). The proper configuration (null) for package groups will be set
// later.
result.put(attribute, LabelAndConfiguration.of(label, configuration));
}
}
private void resolveLateBoundAttributes(
Rule rule,
BuildConfiguration configuration,
BuildConfiguration hostConfiguration,
AttributeMap attributeMap,
Iterable<Attribute> attributes,
ImmutableSortedKeyListMultimap.Builder<Attribute, LabelAndConfiguration> builder)
throws EvalException, InterruptedException {
for (Attribute attribute : attributes) {
if (!attribute.isLateBound() || !attribute.getCondition().apply(attributeMap)) {
continue;
}
List<BuildConfiguration> actualConfigurations = ImmutableList.of(configuration);
if (attribute.getConfigurationTransition() instanceof SplitTransition<?>) {
Preconditions.checkState(attribute.getConfigurator() == null);
// TODO(bazel-team): This ends up applying the split transition twice, both here and in the
// visitRule method below - this is not currently a problem, because the configuration graph
// never contains nested split transitions, so the second application is idempotent.
actualConfigurations =
configuration.getSplitConfigurations(
(SplitTransition<?>) attribute.getConfigurationTransition());
}
for (BuildConfiguration actualConfig : actualConfigurations) {
@SuppressWarnings("unchecked")
LateBoundDefault<BuildConfiguration> lateBoundDefault =
(LateBoundDefault<BuildConfiguration>) attribute.getLateBoundDefault();
if (lateBoundDefault.useHostConfiguration()) {
actualConfig = hostConfiguration;
}
// TODO(bazel-team): This might be too expensive - can we cache this somehow?
if (!lateBoundDefault.getRequiredConfigurationFragments().isEmpty()) {
if (!actualConfig.hasAllFragments(lateBoundDefault.getRequiredConfigurationFragments())) {
continue;
}
}
// TODO(bazel-team): We should check if the implementation tries to access an undeclared
// fragment.
Object actualValue = lateBoundDefault.getDefault(rule, actualConfig);
if (EvalUtils.isNullOrNone(actualValue)) {
continue;
}
try {
if (attribute.getType() == BuildType.LABEL) {
Label label = BuildType.LABEL.cast(actualValue);
builder.put(attribute, LabelAndConfiguration.of(label, actualConfig));
} else if (attribute.getType() == BuildType.LABEL_LIST) {
for (Label label : BuildType.LABEL_LIST.cast(actualValue)) {
builder.put(attribute, LabelAndConfiguration.of(label, actualConfig));
}
} else {
throw new IllegalStateException(
String.format(
"Late bound attribute '%s' is not a label or a label list",
attribute.getName()));
}
} catch (ClassCastException e) {
throw new EvalException(
rule.getLocation(),
String.format(
"When computing the default value of %s, expected '%s', got '%s'",
attribute.getName(),
attribute.getType(),
EvalUtils.getDataTypeName(actualValue, true)));
}
}
}
}
