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+# Copyright 2016 The TensorFlow 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.
+
+_DEFAULT_TYPINGS = [
+    "@com_microsoft_typescript//:lib.es6.d.ts",
+]
+
+def tensorboard_typescript_genrule(name, srcs, typings=[], **kwargs):
+  """Filegroup of compiled TypeScript sources.
+
+  This is a very unsophisticated TypeScript rule where the user is responsible
+  for passing all typings and sources via srcs. It's meant as a stopgap because
+  TypeScript rules currently don't exist for Bazel. The definition of this rule
+  will need to evolve as more ts_library rules are migrated.
+  """
+  for src in srcs:
+    if (src.startswith("/") or
+        src.endswith(".d.ts") or
+        not src.endswith(".ts")):
+      fail("srcs must be typescript sources in same package")
+  native.genrule(
+      name = name,
+      srcs = _DEFAULT_TYPINGS + typings + srcs,
+      outs = [src[:-3] + ".js" for src in srcs],
+      cmd = "$(location @com_microsoft_typescript//:tsc)" +
+            " --inlineSourceMap" +
+            " --inlineSources" +
+            " --outDir $(@D)" +
+            " $(SRCS)",
+      tools = ["@com_microsoft_typescript//:tsc"],
+      **kwargs
+  )
+
+def tensorboard_ts_library(**kwargs):
+  """Rules referencing this will be deleted from the codebase soon."""
+  pass
+
+def tensorboard_webcomponent_library(**kwargs):
+  """Rules referencing this will be deleted from the codebase soon."""
+  pass
+
+def tensorboard_wct_test_suite(**kwargs):
+  """Rules referencing this will be deleted from the codebase soon."""
+  pass