From cc641688296a3cf7efbfd30b942b4cdf8d8049e7 Mon Sep 17 00:00:00 2001
From: Jan Tattermusch <jtattermusch@google.com>
Date: Tue, 17 Jan 2017 11:59:31 +0100
Subject: [PATCH] cmake support for generating from .proto files
---
templates/CMakeLists.txt.template | 95 ++++++++++++++++++++++++++++---
1 file changed, 87 insertions(+), 8 deletions(-)
diff --git a/templates/CMakeLists.txt.template b/templates/CMakeLists.txt.template
index 028c1b8c32..7868d41229 100644
--- a/templates/CMakeLists.txt.template
+++ b/templates/CMakeLists.txt.template
@@ -40,6 +40,17 @@
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
<%!
+
+ import re
+
+ proto_re = re.compile('(.*)\\.proto')
+
+ def proto_replace_ext(filename, ext):
+ m = proto_re.match(filename)
+ if not m:
+ return filename
+ return '${_gRPC_PROTO_GENS_DIR}/' + m.group(1) + ext
+
def get_deps(target_dict):
deps = []
if target_dict.get('baselib', False):
@@ -140,6 +151,9 @@
if(TARGET libprotoc)
set(_gRPC_PROTOBUF_PROTOC_LIBRARIES libprotoc)
endif()
+ if(TARGET protoc)
+ set(_gRPC_PROTOBUF_PROTOC protoc)
+ endif()
else()
message(WARNING "gRPC_PROTOBUF_PROVIDER is \"module\" but PROTOBUF_ROOT_DIR is wrong")
endif()
@@ -152,6 +166,9 @@
if(TARGET protobuf::libprotoc)
set(_gRPC_PROTOBUF_PROTOC_LIBRARIES protobuf::libprotoc)
endif()
+ if(TARGET protobuf::protoc)
+ set(_gRPC_PROTOBUF_PROTOC protobuf::protoc)
+ endif()
set(_gRPC_FIND_PROTOBUF "if(NOT protobuf_FOUND)\n find_package(protobuf CONFIG)\nendif()")
else()
find_package(Protobuf MODULE)
@@ -192,16 +209,60 @@
if(NOT DEFINED CMAKE_INSTALL_CMAKEDIR)
set(CMAKE_INSTALL_CMAKEDIR "<%text>${CMAKE_INSTALL_LIBDIR}</%text>/cmake/gRPC")
endif()
-
+
+ # Create directory for generated .proto files
+ set(_gRPC_PROTO_GENS_DIR <%text>${CMAKE_BINARY_DIR}/gens</%text>)
+ file(MAKE_DIRECTORY <%text>${_gRPC_PROTO_GENS_DIR}</%text>)
+
+ # protobuf_generate_grpc_cpp
+ # --------------------------
+ #
+ # Add custom commands to process ``.proto`` files to C++ using protoc and
+ # GRPC plugin::
+ #
+ # protobuf_generate_grpc_cpp [<ARGN>...]
+ #
+ # ``ARGN``
+ # ``.proto`` files
+ #
+ function(protobuf_generate_grpc_cpp)
+ if(NOT ARGN)
+ message(SEND_ERROR "Error: PROTOBUF_GENERATE_GRPC_CPP() called without any proto files")
+ return()
+ endif()
+
+ set(_protobuf_include_path -I .)
+ foreach(FIL <%text>${ARGN}</%text>)
+ get_filename_component(ABS_FIL <%text>${FIL}</%text> ABSOLUTE)
+ get_filename_component(FIL_WE <%text>${FIL}</%text> NAME_WE)
+ file(RELATIVE_PATH REL_FIL <%text>${CMAKE_SOURCE_DIR}</%text> <%text>${ABS_FIL}</%text>)
+ get_filename_component(REL_DIR <%text>${REL_FIL}</%text> DIRECTORY)
+ set(RELFIL_WE "<%text>${REL_DIR}/${FIL_WE}</%text>")
+
+ add_custom_command(
+ OUTPUT <%text>"${_gRPC_PROTO_GENS_DIR}/${RELFIL_WE}.grpc.pb.cc"</%text>
+ <%text>"${_gRPC_PROTO_GENS_DIR}/${RELFIL_WE}.grpc.pb.h"</%text>
+ <%text>"${_gRPC_PROTO_GENS_DIR}/${RELFIL_WE}.pb.cc"</%text>
+ <%text>"${_gRPC_PROTO_GENS_DIR}/${RELFIL_WE}.pb.h"</%text>
+ COMMAND <%text>${_gRPC_PROTOBUF_PROTOC}</%text>
+ ARGS --grpc_out=<%text>${_gRPC_PROTO_GENS_DIR}</%text>
+ --cpp_out=<%text>${_gRPC_PROTO_GENS_DIR}</%text>
+ --plugin=protoc-gen-grpc=$<TARGET_FILE:grpc_cpp_plugin>
+ <%text>${_protobuf_include_path}</%text>
+ <%text>${REL_FIL}</%text>
+ DEPENDS <%text>${ABS_FIL}</%text> <%text>${_gRPC_PROTOBUF_PROTOC}</%text> grpc_cpp_plugin
+ WORKING_DIRECTORY <%text>${CMAKE_SOURCE_DIR}</%text>
+ COMMENT "Running gRPC C++ protocol buffer compiler on <%text>${FIL}</%text>"
+ VERBATIM)
+
+ <%text>set_source_files_properties("${_gRPC_PROTO_GENS_DIR}/${RELFIL_WE}.grpc.pb.cc" "${_gRPC_PROTO_GENS_DIR}/${RELFIL_WE}.grpc.pb.h" "${_gRPC_PROTO_GENS_DIR}/${RELFIL_WE}.pb.cc" "${_gRPC_PROTO_GENS_DIR}/${RELFIL_WE}.pb.h" PROPERTIES GENERATED TRUE)</%text>
+ endforeach()
+ endfunction()
+
% for lib in libs:
% if lib.build in ["all", "protoc", "tool"] and lib.language in ['c', 'c++']:
- ## TODO(jtattermusch): grpc++_reflection includes .proto files
- ## which is not yet supported and thus fails the entire build.
- ## Re-enable once fixed.
- % if lib.name != 'grpc++_reflection':
- ${cc_library(lib)}
- ${cc_install(lib)}
- % endif
+ ${cc_library(lib)}
+ ${cc_install(lib)}
% endif
% endfor
@@ -215,9 +276,24 @@
<%def name="cc_library(lib)">
add_library(${lib.name}
% for src in lib.src:
+ % if not proto_re.match(src):
${src}
+ % else:
+ ${proto_replace_ext(src, '.pb.cc')}
+ ${proto_replace_ext(src, '.grpc.pb.cc')}
+ ${proto_replace_ext(src, '.pb.h')}
+ ${proto_replace_ext(src, '.grpc.pb.h')}
+ % endif
% endfor
)
+
+ % for src in lib.src:
+ % if proto_re.match(src):
+ protobuf_generate_grpc_cpp(
+ ${src}
+ )
+ % endif
+ % endfor
target_include_directories(${lib.name}
PRIVATE <%text>${CMAKE_CURRENT_SOURCE_DIR}</%text>
@@ -226,6 +302,9 @@
PRIVATE <%text>${PROTOBUF_ROOT_DIR}</%text>/src
PRIVATE <%text>${ZLIB_INCLUDE_DIR}</%text>
PRIVATE <%text>${CMAKE_CURRENT_BINARY_DIR}</%text>/third_party/zlib
+ % if any(proto_re.match(src) for src in lib.src):
+ PRIVATE <%text>${_gRPC_PROTO_GENS_DIR}</%text>
+ % endif
)
% if len(get_deps(lib)) > 0:
--
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