enable building of tests with cmake

templates/CMakeLists.txt.template

@@ -65,6 +65,8 @@
       deps.append("${_gRPC_ZLIB_LIBRARIES}")
     for d in target_dict.get('deps', []):
       deps.append(d)
+    if target_dict.build == 'test' and target_dict.language == 'c++':
+      deps.append("${_gRPC_GFLAGS_LIBRARIES}")
     return deps
   %>
 
@@ -76,6 +78,9 @@
   set(PACKAGE_TARNAME   "<%text>${PACKAGE_NAME}-${PACKAGE_VERSION}</%text>")
   set(PACKAGE_BUGREPORT "https://github.com/grpc/grpc/issues/")
   project(<%text>${PACKAGE_NAME}</%text> C CXX)
+  
+  # Options
+  option(gRPC_BUILD_TESTS "Build tests" OFF)
 
   if (NOT MSVC)
     set(gRPC_INSTALL ON CACHE BOOL "Generate installation target")
@@ -91,7 +96,10 @@
 
   set(gRPC_PROTOBUF_PROVIDER "module" CACHE STRING "Provider of protobuf library")
   set_property(CACHE gRPC_PROTOBUF_PROVIDER PROPERTY STRINGS "module" "package")
-
+  
+  set(gRPC_GFLAGS_PROVIDER "module" CACHE STRING "Provider of gflags library")
+  set_property(CACHE gRPC_GFLAGS_PROVIDER PROPERTY STRINGS "module" "package")
+  
   set(gRPC_USE_PROTO_LITE OFF CACHE BOOL "Use the protobuf-lite library")
 
   if (MSVC)
@@ -195,6 +203,26 @@
     endif()
     set(_gRPC_FIND_SSL "if(NOT OpenSSL_FOUND)\n  find_package(OpenSSL)\nendif()")
   endif()
+  
+  if("<%text>${gRPC_GFLAGS_PROVIDER}</%text>" STREQUAL "module")
+    if(NOT GFLAGS_ROOT_DIR)
+      set(GFLAGS_ROOT_DIR <%text>${CMAKE_CURRENT_SOURCE_DIR}</%text>/third_party/gflags)
+    endif()
+    if(EXISTS "<%text>${GFLAGS_ROOT_DIR}</%text>/CMakeLists.txt")
+        add_subdirectory(<%text>${GFLAGS_ROOT_DIR}</%text> third_party/gflags)
+        if(TARGET gflags-static)
+            set(_gRPC_GFLAGS_LIBRARIES gflags-static)
+        endif()
+    else()
+        message(WARNING "gRPC_GFLAGS_PROVIDER is \"module\" but GFLAGS_ROOT_DIR is wrong")
+    endif()
+  elseif("<%text>${gRPC_GFLAGS_PROVIDER}</%text>" STREQUAL "package")
+    find_package(gflags)
+    if(TARGET gflags::gflags)
+      set(_gRPC_GFLAGS_LIBRARIES gflags::gflags)
+    endif()
+    set(_gRPC_FIND_GFLAGS "if(NOT gflags_FOUND)\n  find_package(gflags)\nendif()")
+  endif()
 
   if(NOT MSVC)
     set(CMAKE_C_FLAGS   "<%text>${CMAKE_C_FLAGS}</%text>   -std=c11")
@@ -260,17 +288,31 @@
   endfunction()
   
   % for lib in libs:
-  % if lib.build in ["all", "protoc", "tool"] and lib.language in ['c', 'c++']:
+  % if lib.build in ["all", "protoc", "tool", "test", "private"] and lib.language in ['c', 'c++']:
+  % if not lib.get('build_system', []) or 'cmake' in lib.get('build_system', []):
+  % if lib.build in ["test", "private"]:
+  if (gRPC_BUILD_TESTS)
+  ${cc_library(lib)}
+  endif (gRPC_BUILD_TESTS)
+  % else:
   ${cc_library(lib)}
   ${cc_install(lib)}
   % endif
+  % endif
+  % endif
   % endfor
 
   % for tgt in targets:
-  % if tgt.build in ["all", "protoc", "tool"] and tgt.language in ['c', 'c++']:
+  % if tgt.build in ["all", "protoc", "tool", "test", "private"] and tgt.language in ['c', 'c++']:
+  % if tgt.build in ["test", "private"]:
+  if (gRPC_BUILD_TESTS)
+  ${cc_binary(tgt)}
+  endif (gRPC_BUILD_TESTS)
+  % else:
   ${cc_binary(tgt)}
   ${cc_install(tgt)}
   % endif
+  % endif
   % endfor
 
   <%def name="cc_library(lib)">
@@ -302,6 +344,11 @@
     PRIVATE <%text>${PROTOBUF_ROOT_DIR}</%text>/src
     PRIVATE <%text>${ZLIB_INCLUDE_DIR}</%text>
     PRIVATE <%text>${CMAKE_CURRENT_BINARY_DIR}</%text>/third_party/zlib
+    PRIVATE <%text>${CMAKE_CURRENT_BINARY_DIR}</%text>/third_party/gflags/include
+  % if lib.build in ['test', 'private'] and lib.language == 'c++':
+    PRIVATE third_party/googletest/include
+    PRIVATE third_party/googletest
+  % endif
   % if any(proto_re.match(src) for src in lib.src):
     PRIVATE <%text>${_gRPC_PROTO_GENS_DIR}</%text>
   % endif
@@ -335,6 +382,9 @@
   % for src in tgt.src:
     ${src}
   % endfor
+  % if tgt.build == 'test' and tgt.language == 'c++':
+    third_party/googletest/src/gtest-all.cc
+  % endif
   )
 
   target_include_directories(${tgt.name}
@@ -344,6 +394,11 @@
     PRIVATE <%text>${PROTOBUF_ROOT_DIR}</%text>/src
     PRIVATE <%text>${ZLIB_ROOT_DIR}</%text>
     PRIVATE <%text>${CMAKE_CURRENT_BINARY_DIR}</%text>/third_party/zlib
+    PRIVATE <%text>${CMAKE_CURRENT_BINARY_DIR}</%text>/third_party/gflags/include
+  % if tgt.build in ['test', 'private'] and tgt.language == 'c++':
+    PRIVATE third_party/googletest/include
+    PRIVATE third_party/googletest
+  % endif
   )
 
   % if len(get_deps(tgt)) > 0: