1 files changed, 56 insertions, 0 deletions
diff --git a/src/main/java/com/google/devtools/build/lib/query2/engine/BuildFilesFunction.java b/src/main/java/com/google/devtools/build/lib/query2/engine/BuildFilesFunction.java
new file mode 100644
index 0000000000..d606a6acb3
--- /dev/null
+++ b/src/main/java/com/google/devtools/build/lib/query2/engine/BuildFilesFunction.java
@@ -0,0 +1,56 @@
+// Copyright 2014 Google Inc. 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.devtools.build.lib.query2.engine.QueryEnvironment.Argument;
+import com.google.devtools.build.lib.query2.engine.QueryEnvironment.ArgumentType;
+import com.google.devtools.build.lib.query2.engine.QueryEnvironment.QueryFunction;
+
+import java.util.List;
+import java.util.Set;
+
+/**
+ * A buildfiles(x) query expression, which computes the set of BUILD files and
+ * subincluded files for each target in set x.  The result is unordered.  This
+ * operator is typically used for determinining what files or packages to check
+ * out.
+ *
+ * <pre>expr ::= BUILDFILES '(' expr ')'</pre>
+ */
+class BuildFilesFunction implements QueryFunction {
+  BuildFilesFunction() {
+  }
+
+  @Override
+  public String getName() {
+    return "buildfiles";
+  }
+
+  @Override
+  public <T> Set<T> eval(QueryEnvironment<T> env, QueryExpression expression, List<Argument> args)
+      throws QueryException {
+    return env.getBuildFiles(expression, args.get(0).getExpression().eval(env));
+  }
+
+  @Override
+  public int getMandatoryArguments() {
+    return 1;
+  }
+
+  @Override
+  public List<ArgumentType> getArgumentTypes() {
+    return ImmutableList.of(ArgumentType.EXPRESSION);
+  }
+}