Import code from internal repository to git

third_party/closure/compiler/closure_js_library.bzl

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+# -*- mode: python; -*-
+#
+# Copyright 2016 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.
+
+"""Build definitions for Closure JavaScript libraries.
+"""
+
+load("//third_party/closure/compiler/private:defs.bzl",
+     "JS_LANGUAGE_DEFAULT",
+     "JS_DEPS_ATTR",
+     "JS_LIBRARY_ATTRS",
+     "collect_js_srcs",
+     "determine_js_language")
+
+def _impl(ctx):
+  srcs, externs = collect_js_srcs(ctx)
+  return struct(files=set(ctx.files.srcs),
+                js_language=determine_js_language(ctx),
+                js_exports=ctx.files.exports,
+                transitive_js_srcs=srcs,
+                transitive_js_externs=externs)
+
+closure_js_library = rule(
+    implementation=_impl,
+    attrs=JS_LIBRARY_ATTRS + {
+        "exports": JS_DEPS_ATTR,
+        "language": attr.string(default=JS_LANGUAGE_DEFAULT),
+    })