build: added CMake file for final users to let them include the library in their project

Author: Alexandre jublot

CMakeLists.txt

@@ -3,56 +3,33 @@ project(NetworkLibrary)
 
 set(CMAKE_CXX_STANDARD 20)
 
-set(REPOSITORY repository_dir)
-
-if (NOT TARGET asio)
-    include(cmake/FindAsio.cmake)
-    FIND_PACKAGE(asio REQUIRED)
-endif ()
-
-
-file(GLOB_RECURSE SRCS src/*.cpp)
-list(REMOVE_ITEM SRCS src/main.cpp)
-
-file(GLOB_RECURSE ICLS include/*.hpp)
-file(GLOB_RECURSE PRIV_ICLS src/include/*.hpp)
+if (NOT TARGET PolymorphNetwork)
+    if (NOT TARGET asio)
+        include(cmake/FindAsio.cmake)
+        FIND_PACKAGE(asio REQUIRED)
+    endif ()
 
-add_library(PolymorphNetwork ${SRCS} ${ICLS} ${PRIV_ICLS})
 
-target_include_directories(PolymorphNetwork PUBLIC
-        include
-)
+    file(GLOB_RECURSE SRCS src/*.cpp)
+    list(REMOVE_ITEM SRCS src/main.cpp)
 
-target_include_directories(PolymorphNetwork PRIVATE
-        src/include
-)
+    file(GLOB_RECURSE ICLS include/*.hpp)
+    file(GLOB_RECURSE PRIV_ICLS src/include/*.hpp)
 
-target_link_libraries(PolymorphNetwork
-        asio
-)
+    add_library(PolymorphNetwork ${SRCS} ${ICLS} ${PRIV_ICLS})
+    target_include_directories(PolymorphNetwork PUBLIC include)
+    target_include_directories(PolymorphNetwork PRIVATE src/include)
+    target_link_libraries(PolymorphNetwork asio)
+    if(WIN32)
+        # MSVC
+        # /wd4100: unreferenced formal parameter (= unused parameter)
+        target_compile_options(PolymorphNetwork PRIVATE /W4)
+    endif()
+endif()
 
 if (${CMAKE_SOURCE_DIR} STREQUAL ${CMAKE_CURRENT_SOURCE_DIR})
-    if (NOT TARGET GTest::gtest_main)
-        include(FetchContent)
-        FetchContent_Declare(
-                googletest
-                GIT_REPOSITORY https://github.com/google/googletest.git
-                GIT_TAG release-1.12.1
-        )
-
-        set(gtest_force_shared_crt ON CACHE BOOL "" FORCE)
-        FetchContent_MakeAvailable(googletest)
-    endif ()
-
+    include(tests/cmake/FindGoogleTest.cmake)
     enable_testing()
 
     add_subdirectory(tests)
-
-
 endif ()
-
-if(WIN32)
-    # MSVC
-    # /wd4100: unreferenced formal parameter (= unused parameter)
-    target_compile_options(PolymorphNetwork PRIVATE /W4)
-endif()

FindPolymorphNetworkLibrary.cmake

@@ -0,0 +1,11 @@
+cmake_minimum_required(VERSION 3.17)
+
+if (NOT TARGET PolymorphNetwork)
+    include(FetchContent)
+    FetchContent_Declare(
+        PolymorphNetwork
+        GIT_REPOSITORY git@github.com:PolymorphEngine/NetworkLibrary.git
+        GIT_TAG        master
+    )
+    FetchContent_MakeAvailable(PolymorphNetwork)
+endif()

tests/cmake/FindGoogleTest.cmake

@@ -0,0 +1,13 @@
+cmake_minimum_required(VERSION 3.17)
+
+if (NOT TARGET GTest::gtest_main)
+    include(FetchContent)
+    FetchContent_Declare(
+            googletest
+            GIT_REPOSITORY https://github.com/google/googletest.git
+            GIT_TAG release-1.12.1
+    )
+
+    set(gtest_force_shared_crt ON CACHE BOOL "" FORCE)
+    FetchContent_MakeAvailable(googletest)
+endif ()