🔧 Copy deps to ./include/ to support add_subdirectory() usage

Reverts regression by 8550275

.gitignore

@@ -1 +1,3 @@
 /build
+/include/clippson/*.h
+/include/clippson/json*

CMakeLists.txt

@@ -3,6 +3,7 @@ project(clippson
   VERSION 0.8.8
   LANGUAGES CXX)
 
+cmake_policy(SET CMP0169 OLD)  # 3.28
 set(CMAKE_VERBOSE_MAKEFILE ON)
 include(CMakePrintHelpers)
 include(FetchContent)
@@ -31,6 +32,7 @@ function(git_fetch package version repo)
     GIT_TAG ${tag}
     GIT_SHALLOW ON
   )
+  FetchContent_GetProperties(${package})
   if(NOT ${package}_POPULATED)
     FetchContent_Populate(${package})
   endif()
@@ -41,25 +43,24 @@ endfunction()
 git_fetch(clipp v1.2.3.1 heavywatal/clipp)
 git_fetch(json v3.11.3 heavywatal/json)
 
+set(clipp_srcs ${clipp_SOURCE_DIR}/include/clipp.h)
+set(json_srcs ${json_SOURCE_DIR}/src/json.hpp ${json_SOURCE_DIR}/src/json_fwd.hpp)
+foreach(src IN LISTS clipp_srcs json_srcs)
+  cmake_print_variables(src)
+  configure_file(${src} ${PROJECT_SOURCE_DIR}/include/${PROJECT_NAME} COPYONLY)
+endforeach()
+
 add_library(${PROJECT_NAME} INTERFACE)
 add_library(${PROJECT_NAME}::${PROJECT_NAME} ALIAS ${PROJECT_NAME})
 target_include_directories(${PROJECT_NAME} INTERFACE
   $<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}/include>
-  $<BUILD_INTERFACE:${clipp_SOURCE_DIR}/include>
-  $<BUILD_INTERFACE:${json_SOURCE_DIR}/src>
   $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>
 )
 target_compile_features(${PROJECT_NAME} INTERFACE cxx_std_17)
 
 install(DIRECTORY ${PROJECT_SOURCE_DIR}/include/
   DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}
 )
-install(FILES
-  ${clipp_SOURCE_DIR}/include/clipp.h
-  ${json_SOURCE_DIR}/src/json.hpp
-  ${json_SOURCE_DIR}/src/json_fwd.hpp
-  DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/${PROJECT_NAME}
-)
 install(TARGETS ${PROJECT_NAME}
   EXPORT ${PROJECT_NAME}-config
 )

test/CMakeLists.txt

@@ -1,5 +1,6 @@
 set(source_files
   example.cpp
+  include_deps.cpp
   types_target.cpp
   types_json.cpp
   types_both.cpp
@@ -8,9 +9,7 @@ set(source_files
 foreach(src IN LISTS source_files)
   get_filename_component(name_we ${src} NAME_WE)
   add_executable(test-${name_we} ${src})
-  set_target_properties(test-${name_we} PROPERTIES
-    CXX_EXTENSIONS OFF
-  )
+  set_target_properties(test-${name_we} PROPERTIES CXX_EXTENSIONS OFF)
   target_link_libraries(test-${name_we} PRIVATE ${PROJECT_NAME}::${PROJECT_NAME})
   target_compile_options(test-${name_we} PRIVATE -Wall -Wextra -pedantic)
   add_test(NAME ${name_we} COMMAND $<TARGET_FILE:test-${name_we}> -h)

test/include_deps.cpp

@@ -0,0 +1,19 @@
+#include <clippson/clipp.h>
+#include <clippson/json.hpp>
+
+#include <iostream>
+
+int main(int argc, char* argv[]) {
+    bool help;
+    bool verbose;
+    auto cli = (
+        clipp::option("-h", "--help").set(help).doc("print help"),
+        clipp::option("-v", "--verbose").set(verbose)
+    );
+    clipp::parse(argc, argv, cli);
+    nlohmann::json vm;
+    vm["help"] = help;
+    vm["verbose"] = verbose;
+    std::cout << vm << std::endl;
+    return 0;
+}