1 files changed, 64 insertions, 0 deletions
diff --git a/src/main/java/com/google/devtools/build/lib/rules/SkylarkFileType.java b/src/main/java/com/google/devtools/build/lib/rules/SkylarkFileType.java
new file mode 100644
index 0000000000..be4a417845
--- /dev/null
+++ b/src/main/java/com/google/devtools/build/lib/rules/SkylarkFileType.java
@@ -0,0 +1,64 @@
+// 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.rules;
+
+import com.google.common.annotations.VisibleForTesting;
+import com.google.common.collect.ImmutableList;
+import com.google.devtools.build.lib.actions.Artifact;
+import com.google.devtools.build.lib.syntax.SkylarkCallable;
+import com.google.devtools.build.lib.syntax.SkylarkModule;
+import com.google.devtools.build.lib.util.FileType;
+import com.google.devtools.build.lib.util.FileTypeSet;
+
+import java.util.List;
+
+/**
+ * A wrapper class for FileType and FileTypeSet functionality in Skylark.
+ */
+@SkylarkModule(name = "FileType",
+    doc = "File type for file filtering. Can be used to filter collections of labels for certain "
+    + "file types.")
+public class SkylarkFileType {
+
+  private final FileType fileType;
+
+  private SkylarkFileType(FileType fileType) {
+    this.fileType = fileType;
+  }
+
+  public static SkylarkFileType of(Iterable<String> extensions) {
+    return new SkylarkFileType(FileType.of(extensions));
+  }
+
+  public FileTypeSet getFileTypeSet() {
+    return FileTypeSet.of(fileType);
+  }
+
+  @SkylarkCallable(doc =
+      "Returns a list created from the elements of the parameter containing all the "
+    + "<a href=\"#modules.File\"><code>File</code></a>s that match the FileType.")
+  public List<Artifact> filter(Iterable<Artifact> files) {
+    return ImmutableList.copyOf(FileType.filter(files, fileType));
+  }
+
+  @SkylarkCallable(doc = "Returns <code>True</code> if the parameter matches the FileType.")
+  public boolean matches(String fileName) {
+    return fileType.apply(fileName);
+  }
+
+  @VisibleForTesting
+  public Object getExtensions() {
+    return fileType.getExtensions();
+  }
+}