private LicensesProvider initializeLicensesProvider() {
if (!ruleContext.getConfiguration().checkLicenses()) {
return LicensesProviderImpl.EMPTY;
}
NestedSetBuilder<TargetLicense> builder = NestedSetBuilder.linkOrder();
BuildConfiguration configuration = ruleContext.getConfiguration();
Rule rule = ruleContext.getRule();
License toolOutputLicense = rule.getToolOutputLicense(ruleContext.attributes());
if (configuration.isHostConfiguration() && toolOutputLicense != null) {
if (toolOutputLicense != License.NO_LICENSE) {
builder.add(new TargetLicense(rule.getLabel(), toolOutputLicense));
}
} else {
if (rule.getLicense() != License.NO_LICENSE) {
builder.add(new TargetLicense(rule.getLabel(), rule.getLicense()));
}
for (TransitiveInfoCollection dep : ruleContext.getConfiguredTargetMap().values()) {
LicensesProvider provider = dep.getProvider(LicensesProvider.class);
if (provider != null) {
builder.addTransitive(provider.getTransitiveLicenses());
}
}
}
return new LicensesProviderImpl(builder.build());
}
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);
}
}
}
}
/**
* Scans {@code action_listeners} associated with this build to see if any {@code extra_actions}
* should be added to this configured target. If any action_listeners are present, a partial visit
* of the artifact/action graph is performed (for as long as actions found are owned by this
* {@link ConfiguredTarget}). Any actions that match the {@code action_listener} get an {@code
* extra_action} associated. The output artifacts of the extra_action are reported to the {@link
* AnalysisEnvironment} for bookkeeping.
*/
private ExtraActionArtifactsProvider initializeExtraActions() {
BuildConfiguration configuration = ruleContext.getConfiguration();
if (configuration.isHostConfiguration()) {
return ExtraActionArtifactsProvider.EMPTY;
}
ImmutableList<Artifact> extraActionArtifacts = ImmutableList.of();
NestedSetBuilder<ExtraArtifactSet> builder = NestedSetBuilder.stableOrder();
List<Label> actionListenerLabels = configuration.getActionListeners();
if (!actionListenerLabels.isEmpty()
&& ruleContext.getRule().getAttributeDefinition(":action_listener") != null) {
ExtraActionsVisitor visitor =
new ExtraActionsVisitor(ruleContext, computeMnemonicsToExtraActionMap());
// The action list is modified within the body of the loop by the addExtraAction() call,
// thus the copy
for (Action action :
ImmutableList.copyOf(ruleContext.getAnalysisEnvironment().getRegisteredActions())) {
if (!actionsWithoutExtraAction.contains(action)) {
visitor.addExtraAction(action);
}
}
extraActionArtifacts = visitor.getAndResetExtraArtifacts();
if (!extraActionArtifacts.isEmpty()) {
builder.add(ExtraArtifactSet.of(ruleContext.getLabel(), extraActionArtifacts));
}
}
// Add extra action artifacts from dependencies
for (TransitiveInfoCollection dep : ruleContext.getConfiguredTargetMap().values()) {
ExtraActionArtifactsProvider provider = dep.getProvider(ExtraActionArtifactsProvider.class);
if (provider != null) {
builder.addTransitive(provider.getTransitiveExtraActionArtifacts());
}
}
if (mandatoryStampFiles != null && !mandatoryStampFiles.isEmpty()) {
builder.add(ExtraArtifactSet.of(ruleContext.getLabel(), mandatoryStampFiles));
}
if (extraActionArtifacts.isEmpty() && builder.isEmpty()) {
return ExtraActionArtifactsProvider.EMPTY;
}
return new ExtraActionArtifactsProvider(extraActionArtifacts, builder.build());
}
static BuildConfiguration setupTransitions(
BuildConfiguration targetConfiguration,
BuildConfiguration dataConfiguration,
BuildConfiguration hostConfiguration,
ListMultimap<SplitTransition<?>, BuildConfiguration> splitTransitionsTable) {
Set<BuildConfiguration> allConfigurations = new LinkedHashSet<>();
allConfigurations.add(targetConfiguration);
allConfigurations.add(dataConfiguration);
allConfigurations.add(hostConfiguration);
allConfigurations.addAll(splitTransitionsTable.values());
Table<BuildConfiguration, Transition, ConfigurationHolder> transitionBuilder =
HashBasedTable.create();
for (BuildConfiguration from : allConfigurations) {
for (ConfigurationTransition transition : ConfigurationTransition.values()) {
BuildConfiguration to;
if (transition == ConfigurationTransition.HOST) {
to = hostConfiguration;
} else if (transition == ConfigurationTransition.DATA && from == targetConfiguration) {
to = dataConfiguration;
} else {
to = from;
}
transitionBuilder.put(from, transition, new ConfigurationHolder(to));
}
}
// TODO(bazel-team): This makes LIPO totally not work. Just a band-aid until we get around to
// implementing a way for the C++ rules to contribute this transition to the configuration
// collection.
for (BuildConfiguration config : allConfigurations) {
transitionBuilder.put(config, CppTransition.LIPO_COLLECTOR, new ConfigurationHolder(config));
transitionBuilder.put(
config,
CppTransition.TARGET_CONFIG_FOR_LIPO,
new ConfigurationHolder(config.isHostConfiguration() ? null : config));
}
for (BuildConfiguration config : allConfigurations) {
Transitions outgoingTransitions =
new BazelTransitions(
config,
transitionBuilder.row(config),
// Split transitions must not have their own split transitions because then they
// would be applied twice due to a quirk in DependencyResolver. See the comment in
// DependencyResolver.resolveLateBoundAttributes().
splitTransitionsTable.values().contains(config)
? ImmutableListMultimap.<SplitTransition<?>, BuildConfiguration>of()
: splitTransitionsTable);
// We allow host configurations to be shared between target configurations. In that case, the
// transitions may already be set.
// TODO(bazel-team): Check that the transitions are identical, or even better, change the
// code to set the host configuration transitions before we even create the target
// configuration.
if (config.isHostConfiguration() && config.getTransitions() != null) {
continue;
}
config.setConfigurationTransitions(outgoingTransitions);
}
return targetConfiguration;
}