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());
}
