[grpc] Use build_modules to find executable grpc_cpp_plugin

recipes/grpc/all/cmake/grpc_cpp_plugin.cmake

@@ -0,0 +1,18 @@
+if(NOT TARGET gRPC::grpc_cpp_plugin)
+    if(CMAKE_CROSSCOMPILING)
+        find_program(GRPC_CPP_PLUGIN_PROGRAM 
+            NAMES grpc_cpp_plugin 
+            PATHS ENV 
+            PATH NO_DEFAULT_PATH)
+    else()
+        find_program(GRPC_CPP_PLUGIN_PROGRAM 
+            NAMES grpc_cpp_plugin 
+            PATHS "${CMAKE_CURRENT_LIST_DIR}/../../bin/"
+            NO_DEFAULT_PATH)
+    endif()
+
+    get_filename_component(GRPC_CPP_PLUGIN_PROGRAM "${GRPC_CPP_PLUGIN_PROGRAM}" ABSOLUTE)
+
+    add_executable(gRPC::grpc_cpp_plugin IMPORTED)
+    set_property(TARGET gRPC::grpc_cpp_plugin PROPERTY IMPORTED_LOCATION ${GRPC_CPP_PLUGIN_PROGRAM})
+endif()

recipes/grpc/all/conanfile.py

@@ -11,7 +11,7 @@ class grpcConan(ConanFile):
     url = "https://github.com/conan-io/conan-center-index"
     homepage = "https://github.com/grpc/grpc"
     license = "Apache-2.0"
-    exports_sources = ["CMakeLists.txt"]
+    exports_sources = ["CMakeLists.txt", "cmake/*"]
     generators = "cmake", "cmake_find_package", "cmake_find_package_multi"
     short_paths = True
 
@@ -116,13 +116,15 @@ def build(self):
         cmake.build()
 
     def package(self):
-        self.copy(pattern="LICENSE", dst="licenses", src=self._source_subfolder)
         cmake = self._configure_cmake()
         cmake.install()
 
         tools.rmdir(os.path.join(self.package_folder, "lib", "cmake"))
         tools.rmdir(os.path.join(self.package_folder, "lib", "pkgconfig"))
         tools.rmdir(os.path.join(self.package_folder, "share"))
+
+        self.copy(pattern="LICENSE", dst="licenses", src=self._source_subfolder)
+        self.copy(pattern="*.cmake", dst="lib/cmake", src=os.path.join(self.source_folder, "cmake"))
 
     def package_info(self):
         bindir = os.path.join(self.package_folder, "bin")
@@ -232,6 +234,10 @@ def package_info(self):
 
         # Executables
         # gRPC::grpc_cpp_plugin
+        if self.options.cpp_plugin:
+            module_target_rel_path = os.path.join("lib", "cmake", "grpc_cpp_plugin.cmake")
+            self.cpp_info.components["execs"].build_modules["cmake_find_package"] = [module_target_rel_path]
+            self.cpp_info.components["execs"].build_modules["cmake_find_package_multi"] = [module_target_rel_path]
         # gRPC::grpc_csharp_plugin
         # gRPC::grpc_node_plugin
         # gRPC::grpc_objective_c_plugin

recipes/grpc/all/test_package/CMakeLists.txt

@@ -18,8 +18,7 @@ message(STATUS "Using protobuf ${protobuf_VERSION}")
 # Find gRPC installation
 find_package(gRPC CONFIG REQUIRED)
 message(STATUS "Using gRPC ${gRPC_VERSION}")
-# set(_GRPC_CPP_PLUGIN_EXECUTABLE $<TARGET_FILE:gRPC::grpc_cpp_plugin>)
-find_program(_GRPC_CPP_PLUGIN_EXECUTABLE grpc_cpp_plugin ${CONAN_BIN_DIRS_GRPC} NO_DEFAULT_PATH)
+set(_GRPC_CPP_PLUGIN_EXECUTABLE $<TARGET_FILE:gRPC::grpc_cpp_plugin>)
 
 # Proto file
 get_filename_component(hw_proto "helloworld.proto" ABSOLUTE)

recipes/grpc/all/test_package/greeter_client_server.cc

@@ -23,12 +23,7 @@
 #include <thread>
 
 #include <grpcpp/grpcpp.h>
-
-#ifdef BAZEL_BUILD
-#include "examples/protos/helloworld.grpc.pb.h"
-#else
 #include "helloworld.grpc.pb.h"
-#endif
 
 using grpc::Channel;
 using grpc::ClientContext;