fix: missing boost targets in the install export set while using Fetc…

…hContent

Signed-off-by: ik <[email protected]>

CMakeLists.txt

@@ -27,6 +27,7 @@ set(CMAKE_CXX_STANDARD          17)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
 set(CMAKE_CXX_EXTENSIONS        OFF)
 set(FETCHCONTENT_QUIET          OFF)
+set(BUILD_SHARED_LIBS           ${OPENGEMINI_BUILD_SHARED_LIBS})
 
 set(OPENGEMINI_COMPILE_DEFINITIONS "")
 
@@ -52,7 +53,6 @@ if(OPENGEMINI_BUILD_HEADER_ONLY_LIBS)
 else()
     list(APPEND OPENGEMINI_COMPILE_DEFINITIONS "OPENGEMINI_SEPARATE_COMPILATION")
 
-    set(BUILD_SHARED_LIBS ${OPENGEMINI_BUILD_SHARED_LIBS})
     if(BUILD_SHARED_LIBS)
         message(STATUS "Will generating shared libraries")
     else()

cmake/OpenGeminiCxxConfig.cmake.in

@@ -21,8 +21,9 @@ set(OPENGEMINI_ENABLE_SSL_SUPPORT @OPENGEMINI_ENABLE_SSL_SUPPORT@)
 include("${CMAKE_CURRENT_LIST_DIR}/@[email protected]")
 
 include(CMakeFindDependencyMacro)
-find_dependency(Boost REQUIRED)
+find_dependency(Boost REQUIRED COMPONENTS coroutine url)
 find_dependency(fmt REQUIRED)
+find_dependency(nlohmann_json REQUIRED)
 
 if(OPENGEMINI_ENABLE_SSL_SUPPORT)
     find_dependency(OpenSSL REQUIRED)

cmake/deps/boost.cmake

@@ -17,14 +17,48 @@
 include_guard()
 include(FetchContent)
 
-message(STATUS "Finding Boost package first before trying to download and build it from source")
-
-FetchContent_Declare(Boost
-    GIT_REPOSITORY https://github.com/boostorg/boost
-    GIT_TAG        boost-1.84.0
-    GIT_PROGRESS   TRUE
-    FIND_PACKAGE_ARGS
-        1.81
-        COMPONENTS coroutine url
-)
-FetchContent_MakeAvailable(Boost)
+find_package(Boost 1.81 QUIET COMPONENTS coroutine url)
+if(NOT Boost_FOUND)
+    message(STATUS "Download Boost and build it from source")
+    set(BOOST_ENABLE_CMAKE ON)
+    FetchContent_Declare(Boost
+        GIT_REPOSITORY https://github.com/boostorg/boost
+        GIT_TAG        boost-1.84.0
+        GIT_PROGRESS   TRUE
+    )
+    FetchContent_MakeAvailable(Boost)
+
+    set(OPENGEMINI_EXPORT_BOOST_TARGETS )
+    macro(append_boost_targets_recursively TARGET_NAME)
+        if (TARGET ${TARGET_NAME})
+            get_target_property(TARGET_ORIGIN_NAME ${TARGET_NAME} ALIASED_TARGET)
+            list(APPEND OPENGEMINI_EXPORT_BOOST_TARGETS ${TARGET_ORIGIN_NAME})
+        endif()
+
+        get_property(DEPEND_TARGETS TARGET ${TARGET_NAME} PROPERTY INTERFACE_LINK_LIBRARIES)
+        foreach(DEPEND_TARGET IN LISTS DEPEND_TARGETS)
+            append_boost_targets_recursively(${DEPEND_TARGET})
+        endforeach()
+    endmacro()
+
+    append_boost_targets_recursively("Boost::asio")
+    append_boost_targets_recursively("Boost::beast")
+    append_boost_targets_recursively("Boost::coroutine")
+    append_boost_targets_recursively("Boost::headers")
+    append_boost_targets_recursively("Boost::url")
+
+    list(REMOVE_DUPLICATES OPENGEMINI_EXPORT_BOOST_TARGETS)
+
+    foreach(TARGET_NAME IN LISTS OPENGEMINI_EXPORT_BOOST_TARGETS)
+        get_property(TARGET_INCLUDE_DIR TARGET ${TARGET_NAME} PROPERTY INTERFACE_INCLUDE_DIRECTORIES)
+        install(
+            DIRECTORY   ${TARGET_INCLUDE_DIR}
+            DESTINATION ${CMAKE_INSTALL_PREFIX}
+        )
+    endforeach()
+
+    install(
+        TARGETS     ${OPENGEMINI_EXPORT_BOOST_TARGETS}
+        EXPORT      ${PROJECT_NAME}Targets
+    )
+endif()