From ace2ed15fe078008986226ef31c122dd6c21745d Mon Sep 17 00:00:00 2001
From: Rich Gowman <rgowman@google.com>
Date: Wed, 31 Jan 2018 14:00:26 -0500
Subject: Add ability to build nanopb and protobuf

---
 cmake/external/nanopb.cmake   | 61 +++++++++++++++++++++++++++++++++++++++++++
 cmake/external/protobuf.cmake | 35 +++++++++++++++++++++++++
 2 files changed, 96 insertions(+)
 create mode 100644 cmake/external/nanopb.cmake
 create mode 100644 cmake/external/protobuf.cmake

(limited to 'cmake')

diff --git a/cmake/external/nanopb.cmake b/cmake/external/nanopb.cmake
new file mode 100644
index 0000000..d602d9a
--- /dev/null
+++ b/cmake/external/nanopb.cmake
@@ -0,0 +1,61 @@
+# Copyright 2018 Google
+#
+# 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.
+
+include(ExternalProject)
+include(ExternalProjectFlags)
+
+ExternalProject_GitSource(
+  NANOPB_GIT
+  GIT_REPOSITORY "https://github.com/nanopb/nanopb.git"
+  GIT_TAG "master" # Needs the most recent. 0.3.9 doesn't fully support cmake.
+)
+
+ExternalProject_Add(
+  nanopb
+  DEPENDS
+    protobuf
+
+  ${NANOPB_GIT}
+
+  PREFIX ${PROJECT_BINARY_DIR}/external/nanopb
+
+  CMAKE_ARGS
+    -DCMAKE_BUILD_TYPE:STRING=${CMAKE_BUILD_TYPE}
+    -DBUILD_SHARED_LIBS:BOOL=OFF
+    -Dnanopb_BUILD_GENERATOR:BOOL=ON
+    -Dnanopb_PROTOC_PATH:STRING=${FIREBASE_INSTALL_DIR}/external/protobuf/src/protobuf-build/src/protoc
+
+  BUILD_COMMAND
+    ${CMAKE_COMMAND} --build .
+  # NB: The following additional build commands are only necessary to
+  # regenerate the nanopb proto files.
+  COMMAND
+    ${CMAKE_COMMAND} -E make_directory <BINARY_DIR>/generator/proto
+  COMMAND
+    ${CMAKE_COMMAND} -E copy <SOURCE_DIR>/generator/proto/__init__.py <BINARY_DIR>/generator/proto/
+  COMMAND
+    ${CMAKE_COMMAND} -E copy <SOURCE_DIR>/generator/protoc-gen-nanopb <BINARY_DIR>/generator/
+  COMMAND
+    ${CMAKE_COMMAND} -E copy <SOURCE_DIR>/generator/nanopb_generator.py <BINARY_DIR>/generator/
+  COMMAND
+    ${CMAKE_COMMAND} -E copy <BINARY_DIR>/nanopb_pb2.py <BINARY_DIR>/generator/proto/
+  COMMAND
+    ${CMAKE_COMMAND} -E copy <BINARY_DIR>/plugin_pb2.py <BINARY_DIR>/generator/proto/
+
+  # TODO: once we clone via a tag (rather than the master branch) we should
+  # disable updates; i.e.:
+  #   UPDATE_COMMAND ""
+
+  INSTALL_COMMAND ""
+)
diff --git a/cmake/external/protobuf.cmake b/cmake/external/protobuf.cmake
new file mode 100644
index 0000000..da5f11d
--- /dev/null
+++ b/cmake/external/protobuf.cmake
@@ -0,0 +1,35 @@
+# Copyright 2018 Google
+#
+# 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.
+
+include(ExternalProject)
+include(ExternalProjectFlags)
+
+ExternalProject_GitSource(
+  PROTOBUF_GIT
+  GIT_REPOSITORY "https://github.com/google/protobuf.git"
+  GIT_TAG "v3.5.1.1"
+)
+
+ExternalProject_Add(
+  protobuf
+
+  ${PROTOBUF_GIT}
+
+  PREFIX ${PROJECT_BINARY_DIR}/external/protobuf
+
+  UPDATE_COMMAND ""
+  CONFIGURE_COMMAND cd <SOURCE_DIR> && ./autogen.sh
+    COMMAND <SOURCE_DIR>/configure --prefix=${PREFIX}
+  INSTALL_COMMAND ""
+)
-- 
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