- Add CMake Workflow Presets

- Upgrade to gitup workflow action v3
- Prepare use of git-flow
- Use CMake v3.21 variable PROJECT_IS_TOP_LEVEL
- Use CMAKE_DEBUG_POSTFIX to prevent name clashes
- Add more config files

standalone/CMakeLists.txt

@@ -1,7 +1,16 @@
-cmake_minimum_required(VERSION 3.14...3.27)
+cmake_minimum_required(VERSION 3.21...3.27)
 
 project(GreeterStandalone LANGUAGES CXX)
 
+if(PROJECT_IS_TOP_LEVEL AND CMAKE_BUILD_TYPE STREQUAL "Release")
+  set(CMAKE_SKIP_INSTALL_RULES
+      NO
+      CACHE BOOL "Forced generation of installation rules" FORCE
+  )
+endif()
+
+option(OPTION_ENABLE_UNITY "Enable Unity builds of project" ON)
+
 # --- Import tools ----
 
 include(../cmake/tools.cmake)
@@ -13,6 +22,7 @@ include(../cmake/CPM.cmake)
 CPMAddPackage(
   GITHUB_REPOSITORY jarro2783/cxxopts
   VERSION 3.1.1
+  SYSTEM ON # used in case of cmake v3.25
   OPTIONS "CXXOPTS_BUILD_EXAMPLES NO" "CXXOPTS_BUILD_TESTS NO" "CXXOPTS_ENABLE_INSTALL YES"
 )
 
@@ -27,8 +37,22 @@ CPMAddPackage(
 file(GLOB sources CONFIGURE_DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/source/*.cpp)
 
 add_executable(${PROJECT_NAME} ${sources})
+if(CMAKE_DEBUG_POSTFIX)
+  set_property(TARGET ${PROJECT_NAME} PROPERTY DEBUG_POSTFIX ${CMAKE_DEBUG_POSTFIX})
+endif()
+target_link_libraries(${PROJECT_NAME} Greeter::Greeter cxxopts::cxxopts)
+set_target_properties(${PROJECT_NAME} PROPERTIES UNITY_BUILD ${OPTION_ENABLE_UNITY})
 
-# TODO(CK): why is this needed?
+# TODO(CK): why is this used? This overrides the CMAKE_DEBUG_POSTFIX!
 set_target_properties(${PROJECT_NAME} PROPERTIES OUTPUT_NAME Greeter)
 
-target_link_libraries(${PROJECT_NAME} Greeter::Greeter cxxopts::cxxopts)
+# --- Test it ---
+
+enable_testing()
+add_test(NAME ${PROJECT_NAME} COMMAND ${PROJECT_NAME} --help)
+
+# --- Install it ---
+
+install(TARGETS ${PROJECT_NAME} RUNTIME)
+
+include(CPack)