pw_protobuf_compiler: nanopb support
This change adds support for compiling nanopb protobufs using
pw_protobuf_compiler.
The pw_protobuf_langs build variable is renamed to
pw_protobuf_generators as there is no longer a 1:1 mapping of languages.
To compile nanopb, add the "nanopb" generator to pw_protobuf_generators.
The build variable $dir_third_party_nanopb must be set to point to a
local installation of nanopb with GN support:
https://github.com/frolv/nanopb/tree/gn-build
The host build will run a test which compiles nanopb code if
$dir_third_party_nanopb is set.
Change-Id: I29bf8780644917f35203a538b0bd7e4f3ec40180
diff --git a/pw_protobuf_compiler/BUILD b/pw_protobuf_compiler/BUILD
new file mode 100644
index 0000000..34b516e
--- /dev/null
+++ b/pw_protobuf_compiler/BUILD
@@ -0,0 +1,23 @@
+# Copyright 2020 The Pigweed Authors
+#
+# 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
+#
+# https://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(default_visibility = ["//visibility:public"])
+
+licenses(["notice"]) # Apache License 2.0
+
+# TODO(frolv): Figure out how to support nanopb codegen in Bazel.
+filegroup(
+ name = "nanopb_test",
+ srcs = ["nanopb_test.cc"],
+)