| // Copyright 2014 The Bazel Authors. All rights reserved. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| package com.google.devtools.build.lib.query2.engine; |
| |
| import com.google.common.collect.ImmutableList; |
| import com.google.common.collect.Iterables; |
| import com.google.devtools.build.lib.query2.engine.QueryEnvironment.QueryTaskFuture; |
| import com.google.devtools.build.lib.query2.engine.QueryEnvironment.ThreadSafeMutableSet; |
| import java.util.List; |
| |
| /** |
| * A loadfiles(x) query expression, which computes the set of .bzl files |
| * for each target in set x. The result is unordered. This |
| * operator is typically used for determining what files or packages to check |
| * out. |
| * |
| * <pre>expr ::= LOADFILES '(' expr ')'</pre> |
| */ |
| public class LoadFilesFunction implements QueryEnvironment.QueryFunction { |
| LoadFilesFunction() {} |
| |
| @Override |
| public String getName() { |
| return "loadfiles"; |
| } |
| |
| @Override |
| public <T> QueryTaskFuture<Void> eval( |
| final QueryEnvironment<T> env, |
| QueryExpressionContext<T> context, |
| final QueryExpression expression, |
| List<QueryEnvironment.Argument> args, |
| final Callback<T> callback) { |
| final Uniquifier<T> uniquifier = env.createUniquifier(); |
| return env.eval( |
| args.get(0).getExpression(), |
| context, |
| new Callback<T>() { |
| @Override |
| public void process(Iterable<T> partialResult) |
| throws QueryException, InterruptedException { |
| ThreadSafeMutableSet<T> result = env.createThreadSafeMutableSet(); |
| Iterables.addAll(result, partialResult); |
| callback.process( |
| uniquifier.unique( |
| env.getBuildFiles( |
| expression, result, /*buildFiles=*/ false, /*loads=*/ true, context))); |
| } |
| }); |
| } |
| |
| @Override |
| public int getMandatoryArguments() { |
| return 1; |
| } |
| |
| @Override |
| public List<QueryEnvironment.ArgumentType> getArgumentTypes() { |
| return ImmutableList.of(QueryEnvironment.ArgumentType.EXPRESSION); |
| } |
| } |