From 045ebf7a8c9f4ac42e6a1774e1c470850638c463 Mon Sep 17 00:00:00 2001
From: SpectraL519 <jmusial2003@gmail.com>
Date: Wed, 15 May 2024 16:24:27 +0200
Subject: [PATCH] cmake integration test

---
 CMakeLists.txt               | 89 +++++++++++++++---------------------
 cmake/cpp-ap-config.cmake.in | 10 ++--
 2 files changed, 40 insertions(+), 59 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 258c14d..d60ddd2 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,6 +1,6 @@
 cmake_minimum_required(VERSION 3.12)
 
-# check if CPP-AP is a top level project
+# Check if CPP-AP is a top level project
 if (NOT DEFINED PROJECT_NAME)
     set(CPP_AP_IS_TOP_LEVEL_PROJECT ON)
 else()
@@ -15,40 +15,39 @@ project(
     LANGUAGES CXX
 )
 
-# define the library target
+# Define the library target
 add_library(cpp-ap INTERFACE)
 target_include_directories(cpp-ap INTERFACE
     $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
     $<INSTALL_INTERFACE:include>
 )
+set_target_properties(cpp-ap PROPERTIES
+    CXX_STANDARD 20
+    CXX_STANDARD_REQUIRED YES
+)
 
-# installation rules
+# Installation configuration
 include(GNUInstallDirs)
-install(TARGETS cpp-ap
-    EXPORT cpp-ap-targets
-    INCLUDES DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}
-)
+include(CMakePackageConfigHelpers)
 
-install(DIRECTORY include/ DESTINATION ${CMAKE_INSTALL_INCLUDEDIR})
+# Install the headers
+install(DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/include/
+        DESTINATION ${CMAKE_INSTALL_INCLUDEDIR})
 
-# generate and install the CMake package configuration files
-install(EXPORT cpp-ap-targets
-    FILE cpp-ap-targets.cmake
-    NAMESPACE cpp-ap::
-    DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/cpp-ap
+# Install the library target
+install(TARGETS cpp-ap EXPORT cpp-ap-targets)
+
+# Create a Config file for find_package
+configure_package_config_file(
+    ${CMAKE_CURRENT_SOURCE_DIR}/cmake/cpp-ap-config.cmake.in
+    ${CMAKE_CURRENT_BINARY_DIR}/cpp-ap-config.cmake
+    INSTALL_DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/cpp-ap
 )
 
-include(CMakePackageConfigHelpers)
 write_basic_package_version_file(
     ${CMAKE_CURRENT_BINARY_DIR}/cpp-ap-config-version.cmake
     VERSION ${PROJECT_VERSION}
-    COMPATIBILITY ExactVersion
-)
-
-configure_package_config_file(
-    ${CMAKE_CURRENT_LIST_DIR}/cmake/cpp-ap-config.cmake.in
-    ${CMAKE_CURRENT_BINARY_DIR}/cpp-ap-config.cmake
-    INSTALL_DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/cpp-ap
+    COMPATIBILITY SameMajorVersion
 )
 
 install(FILES
@@ -57,40 +56,24 @@ install(FILES
     DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/cpp-ap
 )
 
-if (CPP_AP_IS_TOP_LEVEL_PROJECT)
-    option(CPP_AP_BUILD_TESTS "Build tests" ON)
-    option(CPP_AP_BUILD_EXAMPLES "Build examples" OFF)
-
-    if(CPP_AP_BUILD_EXAMPLES)
-        add_subdirectory(examples)
-    endif()
+install(EXPORT cpp-ap-targets
+    FILE cpp-ap-targets.cmake
+    NAMESPACE cpp-ap::
+    DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/cpp-ap
+)
 
-    if(CPP_AP_BUILD_TESTS)
-        enable_testing()
+# For FetchContent usage
+if (CPP_AP_IS_TOP_LEVEL_PROJECT)
+    include(CTest)
+    if (BUILD_TESTING)
         add_subdirectory(test)
     endif()
+endif()
 
-    if(CPP_AP_INSTALL)
-        install(EXPORT cpp-ap-targets
-            FILE cpp-ap-config.cmake
-            NAMESPACE ap::
-            DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/cpp-ap
-        )
-
-        install(FILES
-            ${CMAKE_CURRENT_BINARY_DIR}/cpp-ap-config-version.cmake
-            DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/cpp-ap
-        )
-    endif()
-
-    set(CPACK_PACKAGE_NAME "${PROJECT_NAME}")
-    set(CPACK_PACKAGE_DESCRIPTION_SUMMARY "${PROJECT_DESCRIPTION}")
-    set(CPACK_PACKAGE_VENDOR "SpectraL519")
-    set(CPACK_PACKAGE_CONTACT "Jakub Musiał jmusial2003@gmail.com")
-    set(CPACK_PACKAGE_VERSION "${PROJECT_VERSION}")
-    set(CPACK_PACKAGE_VERSION_MAJOR "${PROJECT_VERSION_MAJOR}")
-    set(CPACK_PACKAGE_VERSION_MINOR "${PROJECT_VERSION_MINOR}")
-    set(CPACK_PACKAGE_VERSION_PATCH "${PROJECT_VERSION_PATCH}")
+# Exporting from the build tree
+export(EXPORT cpp-ap-targets
+    FILE ${CMAKE_CURRENT_BINARY_DIR}/cpp-ap-targets.cmake
+    NAMESPACE cpp-ap::
+)
 
-    include(CPack)
-endif()
+export(PACKAGE cpp-ap)
diff --git a/cmake/cpp-ap-config.cmake.in b/cmake/cpp-ap-config.cmake.in
index 6b4bbff..cf97c93 100644
--- a/cmake/cpp-ap-config.cmake.in
+++ b/cmake/cpp-ap-config.cmake.in
@@ -1,9 +1,7 @@
 @PACKAGE_INIT@
 
-# avoid repeatedly including the targets
-if(NOT TARGET cpp-ap::cpp-ap)
-    # Provide path for scripts
-    list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_LIST_DIR}")
+include(CMakeFindDependencyMacro)
 
-    include(${CMAKE_CURRENT_LIST_DIR}/cpp-ap-targets.cmake)
-endif()
+set_and_check(CPP_AP_INCLUDE_DIR "@PACKAGE_INSTALL_PREFIX@/@CMAKE_INSTALL_INCLUDEDIR@")
+
+include("${CMAKE_CURRENT_LIST_DIR}/cpp-ap-targets.cmake")