Import code from internal repository to git

third_party/closure/stylesheets/closure_css_binary.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 CSS compiled by the Closure Stylesheets.
+"""
+
+_CSS_FILE_TYPE = FileType([".css", ".gss"])
+_JS_FILE_TYPE = FileType([".js"])
+
+def _impl(ctx):
+  srcs = set(order="compile")
+  for dep in ctx.attr.deps:
+    srcs += dep.transitive_css_srcs
+  srcs += _CSS_FILE_TYPE.filter(ctx.files.srcs)
+  js_srcs = set(order="compile")
+  js_srcs += ctx.attr._library.transitive_js_srcs
+  js_srcs += _JS_FILE_TYPE.filter([ctx.outputs.js])
+  js_externs = set(order="compile")
+  js_externs += ctx.attr._library.transitive_js_externs
+  args = [
+      "--output-file",
+      ctx.outputs.out.path,
+      "--output-renaming-map",
+      ctx.outputs.js.path,
+      "--output-renaming-map-format",
+      "CLOSURE_COMPILED_SPLIT_HYPHENS",
+  ]
+  if ctx.attr.debug:
+    args += ["--rename", "DEBUG", "--pretty-print"]
+  else:
+    args += ["--rename", "CLOSURE"]
+  args += ctx.attr.defs
+  args += [src.path for src in srcs]
+  ctx.action(
+      inputs=list(srcs),
+      outputs=[ctx.outputs.out, ctx.outputs.js],
+      arguments=args,
+      executable=ctx.executable._compiler,
+      progress_message="Compiling %d stylesheets to %s" % (
+          len(srcs), ctx.outputs.out.short_path))
+  return struct(files=set([ctx.outputs.out]),
+                js_language="ANY",
+                js_exports=set(order="compile"),
+                transitive_js_srcs=js_srcs,
+                transitive_js_externs=js_externs)
+
+closure_css_binary = rule(
+    implementation=_impl,
+    attrs={
+        "srcs": attr.label_list(allow_files=_CSS_FILE_TYPE),
+        "deps": attr.label_list(
+            allow_files=False,
+            providers=["transitive_css_srcs"]),
+        "defs": attr.string_list(),
+        "debug": attr.bool(default=False),
+        "_compiler": attr.label(
+            default=Label("//third_party/closure/stylesheets"),
+            executable=True),
+        "_library": attr.label(
+            default=Label("//third_party/closure/library"),
+            providers=["transitive_js_srcs",
+                       "transitive_js_externs"]),
+    },
+    outputs={"out": "%{name}.css",
+             "js": "%{name}.css.js"})