private NestedSet<Artifact> getPortableProtoFilters() {
NestedSetBuilder<Artifact> portableProtoFilters = NestedSetBuilder.stableOrder();
if (experimentalAutoUnion() && targetType == TargetType.LINKING_TARGET) {
Iterable<ObjcProtoProvider> objcProtoProviders =
ruleContext.getPrerequisites("deps", Mode.TARGET, ObjcProtoProvider.class);
for (ObjcProtoProvider objcProtoProvider : objcProtoProviders) {
portableProtoFilters.addTransitive(objcProtoProvider.getPortableProtoFilters());
}
}
portableProtoFilters.addAll(attributes.getPortableProtoFilters());
return portableProtoFilters.build();
}
/**
* Validates proto support.
*
* <ul>
* <li>Validates that there are protos specified to be compiled.
* <li>Validates that, when enabling the open source protobuf library, the options for the PB2
* are not specified also.
* <li>Validates that, when enabling the open source protobuf library, the rule specifies at
* least one portable proto filter file.
* </ul>
*
* @return this proto support
*/
public ProtoSupport validate() {
if (attributes.getProtoFiles().isEmpty()) {
ruleContext.ruleError(NO_PROTOS_ERROR);
}
if (usesProtobufLibrary()) {
if (attributes.getPortableProtoFilters().isEmpty()) {
ruleContext.ruleError(PORTABLE_PROTO_FILTERS_EMPTY_ERROR);
}
if (attributes.outputsCpp()
|| attributes.usesObjcHeaderNames()
|| attributes.needsPerProtoIncludes()
|| attributes.getOptionsFile() != null) {
ruleContext.ruleError(PORTABLE_PROTO_FILTERS_NOT_EXCLUSIVE_ERROR);
}
}
return this;
}