Use ctest --build-and-test (#1)

* Use ctest --build-and-test

* Move sub presets to cmake/presets

* Final cleanup

.cmake-format.yaml

@@ -1,5 +1,5 @@
 format:
-  line_width: 123
+  line_width: 120
   tab_size: 4
   max_subgroups_hwrap: 4
   max_pargs_hwrap: 4

CMakeLists.txt

@@ -8,13 +8,11 @@ project(mylib VERSION 1.0.0 DESCRIPTION "Template for C++ library built with CMa
 include(cmake/utils.cmake)
 include(GNUInstallDirs)
 
-string(COMPARE EQUAL "${CMAKE_SOURCE_DIR}" "${CMAKE_CURRENT_SOURCE_DIR}" is_top_level)
-
 # MYLIB_SHARED_LIBS option (undefined by default) can be used to force shared/static build
-option(MYLIB_BUILD_TESTS "Build mylib tests" ${is_top_level})
-option(MYLIB_BUILD_EXAMPLES "Build mylib examples" ${is_top_level})
+option(MYLIB_BUILD_TESTS "Build mylib tests" ${PROJECT_IS_TOP_LEVEL})
+option(MYLIB_BUILD_EXAMPLES "Build mylib examples" ${PROJECT_IS_TOP_LEVEL})
 option(MYLIB_BUILD_DOCS "Build mylib documentation" OFF)
-option(MYLIB_INSTALL "Generate target for installing mylib" ${is_top_level})
+option(MYLIB_INSTALL "Generate target for installing mylib" ${PROJECT_IS_TOP_LEVEL})
 set_if_undefined(
     MYLIB_INSTALL_CMAKEDIR
     "${CMAKE_INSTALL_LIBDIR}/cmake/mylib"
@@ -40,7 +38,7 @@ if(NOT DEFINED CMAKE_BUILD_TYPE AND NOT DEFINED CMAKE_CONFIGURATION_TYPES)
 endif()
 
 # Neither of these two are technically needed, but they make the expectation clear
-set_if_undefined(CMAKE_CXX_STANDARD 20)
+set_if_undefined(CMAKE_CXX_STANDARD 17)
 set_if_undefined(CMAKE_CXX_EXTENSIONS FALSE)
 
 set_if_undefined(CMAKE_CXX_VISIBILITY_PRESET hidden)
@@ -101,15 +99,16 @@ if(MYLIB_INSTALL AND NOT CMAKE_SKIP_INSTALL_RULES)
 
     write_basic_package_version_file(mylib-config-version.cmake COMPATIBILITY SameMajorVersion)
 
+    # cmake-format: off
     install(TARGETS mylib
             EXPORT mylib_export
             RUNTIME COMPONENT mylib
             LIBRARY COMPONENT mylib NAMELINK_COMPONENT mylib-dev
-            ARCHIVE COMPONENT mylib-dev FILE_SET HEADERS COMPONENT mylib-dev
-            INCLUDES
-            COMPONENT mylib-dev
-            DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}"
+            ARCHIVE COMPONENT mylib-dev
+            INCLUDES DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}"
+            FILE_SET HEADERS COMPONENT mylib-dev
     )
+    # cmake-format: on
 
     set(targets_file "mylib-shared-targets.cmake")
 
@@ -124,8 +123,9 @@ if(MYLIB_INSTALL AND NOT CMAKE_SKIP_INSTALL_RULES)
             NAMESPACE mylib::
     )
 
-    install(FILES "${CMAKE_CURRENT_BINARY_DIR}/mylib-config.cmake" "${CMAKE_CURRENT_BINARY_DIR}/mylib-config-version.cmake"
-            COMPONENT mylib-dev DESTINATION "${MYLIB_INSTALL_CMAKEDIR}"
+    install(FILES "${CMAKE_CURRENT_BINARY_DIR}/mylib-config.cmake"
+                  "${CMAKE_CURRENT_BINARY_DIR}/mylib-config-version.cmake" COMPONENT mylib-dev
+            DESTINATION "${MYLIB_INSTALL_CMAKEDIR}"
     )
 
     if(MSVC)

CMakePresets.json

@@ -6,7 +6,7 @@
     "patch": 0
   },
   "include": [
-    "CMake${hostSystemName}Presets.json"
+    "cmake/presets/CMake${hostSystemName}Presets.json"
   ],
   "buildPresets": [
     {

CMakeLinuxPresets.json → cmake/presets/CMakeLinuxPresets.json

@@ -29,8 +29,8 @@
       "name": "Debug",
       "description": "Possix preset for library developers",
       "inherits": [
-        "Release",
         "dev-mode",
+        "Release",
         "clang-tidy"
       ]
     }

CMakeWindowsPresets.json → cmake/presets/CMakeWindowsPresets.json

@@ -30,8 +30,8 @@
       "name": "Debug",
       "description": "Windows preset for library developers",
       "inherits": [
-        "Release",
-        "dev-mode"
+        "dev-mode",
+        "Release"
       ],
       "generator": "Visual Studio 17 2022"
     }

examples/add/CMakeLists.txt

@@ -1,11 +1,10 @@
-cmake_minimum_required(VERSION 3.14)
+cmake_minimum_required(VERSION 3.25...3.30)
 project(mylib-add LANGUAGES CXX)
 
 include("../../cmake/utils.cmake")
-string(COMPARE EQUAL "${CMAKE_SOURCE_DIR}" "${CMAKE_CURRENT_SOURCE_DIR}" is_top_level)
 
-if(is_top_level)
-    find_package(mylib REQUIRED)
+if(PROJECT_IS_TOP_LEVEL)
+    find_package(mylib 1.0.0 REQUIRED)
 endif()
 
 set(sources main.cpp)
@@ -15,6 +14,6 @@ add_executable(mylib-add)
 target_sources(mylib-add PRIVATE ${sources})
 target_link_libraries(mylib-add PRIVATE mylib::mylib)
 
-if(NOT is_top_level)
+if(NOT PROJECT_IS_TOP_LEVEL)
     win_copy_deps_to_target_dir(mylib-add mylib::mylib)
 endif()

tests/CMakeLists.txt

@@ -1,18 +1,17 @@
 cmake_minimum_required(VERSION 3.25...3.30)
-project(mylib-tests)
+project(mylib-tests LANGUAGES CXX)
 
 #----------------------------------------------------------------------------------------------------------------------
 # general settings and options
 #----------------------------------------------------------------------------------------------------------------------
 
 include("../cmake/utils.cmake")
-string(COMPARE EQUAL "${CMAKE_SOURCE_DIR}" "${CMAKE_CURRENT_SOURCE_DIR}" is_top_level)
 
-if(is_top_level)
+if(PROJECT_IS_TOP_LEVEL)
     enable_testing()
 
     # Neither of these two are technically needed, but they make the expectation clear
-    set_if_undefined(CMAKE_CXX_STANDARD 20)
+    set_if_undefined(CMAKE_CXX_STANDARD 17)
     set_if_undefined(CMAKE_CXX_EXTENSIONS FALSE)
 endif()
 
@@ -23,24 +22,26 @@ endif()
 include(FetchContent)
 FetchContent_Declare(
     googletest URL https://github.com/google/googletest/archive/refs/tags/v1.15.2.tar.gz DOWNLOAD_EXTRACT_TIMESTAMP ON
-    DOWNLOAD_NO_PROGRESS ON
+    DOWNLOAD_NO_PROGRESS ON FIND_PACKAGE_ARGS NAMES GTest
 )
 
 set(gtest_force_shared_crt ON CACHE BOOL "" FORCE) # do not override parent project's runtime settings on Windows
 set(INSTALL_GTEST OFF)
-
-# For simplicity, always build googletest as static library. This prevents mylib-tests executable from
-# complaining about missing googletest DLLs on Windows.
-set(BUILD_SHARED_LIBS OFF)
+set(BUILD_GMOCK OFF)
 
 FetchContent_MakeAvailable(googletest)
 
 #----------------------------------------------------------------------------------------------------------------------
 # tests dependencies
 #----------------------------------------------------------------------------------------------------------------------
 
-if(is_top_level)
-    find_package(mylib REQUIRED)
+if(PROJECT_IS_TOP_LEVEL)
+    find_package(mylib 1.0.0 QUIET)
+    if(NOT mylib_FOUND)
+        message(STATUS "find_package(mylib) was NOT found, use as subproject ...")
+        # test if the targets are usable if used as subproject
+        add_subdirectory(.. mylib EXCLUDE_FROM_ALL)
+    endif()
 endif()
 
 #----------------------------------------------------------------------------------------------------------------------
@@ -57,9 +58,26 @@ source_group(TREE "${CMAKE_CURRENT_SOURCE_DIR}" FILES ${sources})
 add_executable(mylib-tests)
 target_sources(mylib-tests PRIVATE ${sources})
 
-target_link_libraries(mylib-tests PRIVATE mylib::mylib gtest_main)
+target_link_libraries(mylib-tests PRIVATE mylib::mylib GTest::gtest_main)
+
+if(NOT PROJECT_IS_TOP_LEVEL)
+    # test if the targets are findable from the build directory
+    # cmake-format: off
+    add_test(find-package-test
+        ${CMAKE_CTEST_COMMAND}
+        -C ${CMAKE_BUILD_TYPE}
+        --build-and-test
+            "${CMAKE_CURRENT_SOURCE_DIR}"
+            "${CMAKE_CURRENT_BINARY_DIR}/find-package-test"
+        --build-generator ${CMAKE_GENERATOR}
+        --build-makeprogram ${CMAKE_MAKE_PROGRAM}
+        --build-options
+            "-DCMAKE_CXX_COMPILER=${CMAKE_CXX_COMPILER}"
+            "-DCMAKE_BUILD_TYPE=${CMAKE_BUILD_TYPE}"
+            "-DCMAKE_PREFIX_PATH=${CMAKE_PREFIX_PATH}"
+    )
+    # cmake-format: on
 
-if(NOT is_top_level)
     win_copy_deps_to_target_dir(mylib-tests mylib::mylib)
 endif()