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rxbryanrxbryan
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add extension for loading metacall*.json
1 parent 7ff9515 commit d7ab16c

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‎source/CMakeLists.txt

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@@ -111,6 +111,7 @@ add_subdirectory(serial)
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add_subdirectory(configuration)
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add_subdirectory(loader)
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add_subdirectory(metacall)
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add_subdirectory(extensions)
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# Loaders
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set(IDE_FOLDER "Loaders")

‎source/extensions/CMakeLists.txt

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#Check if extension loader is enabled
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if(NOT OPTION_BUILD_LOADERS OR NOT OPTION_BUILD_LOADERS_EXT)
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return()
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endif()
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#
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# Sub-projects
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#
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add_subdirectory(load_extensions)

‎source/extensions/load_extensions/CMakeLists.txt

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# Target name
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set(target load_extensions)
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# Exit here if required dependencies are not met
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message(STATUS "Script ${target}")
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# Set API export file and macro
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string(TOUPPER ${target} target_upper)
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set(feature_file "include/${target}/${target}_features.h")
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set(export_file "include/${target}/${target}_api.h")
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set(export_macro "${target_upper}_API")
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#
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# Compiler warnings
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#
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include(Warnings)
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#
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# Compiler security
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#
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include(SecurityFlags)
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#
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# Sources
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#
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set(include_path "${CMAKE_CURRENT_SOURCE_DIR}/include/${target}")
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set(source_path "${CMAKE_CURRENT_SOURCE_DIR}/source")
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set(headers
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${include_path}/load_extensions.h
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)
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set(sources
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${source_path}/load_extensions.cpp
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)
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# Group source files
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set(header_group "Header Files (API)")
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set(source_group "Source Files")
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source_group_by_path(${include_path} "\\\\.h$|\\\\.hpp$"
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${header_group} ${headers})
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source_group_by_path(${source_path} "\\\\.cpp$|\\\\.c$|\\\\.h$|\\\\.hpp$"
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${source_group} ${sources})
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#
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# Create library
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#
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# Build library
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add_library(${target} MODULE
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${sources}
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${headers}
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)
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# Create namespaced alias
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add_library(${META_PROJECT_NAME}::${target} ALIAS ${target})
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# Export library for downstream projects
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export(TARGETS ${target} NAMESPACE ${META_PROJECT_NAME}:: FILE ${PROJECT_BINARY_DIR}/cmake/${target}/${target}-export.cmake)
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# Create feature detection header
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# Compilers: https://cmake.org/cmake/help/v3.1/variable/CMAKE_LANG_COMPILER_ID.html#variable:CMAKE_%3CLANG%3E_COMPILER_ID
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# Feature: https://cmake.org/cmake/help/v3.1/prop_gbl/CMAKE_CXX_KNOWN_FEATURES.html
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# Check for availability of module; use pre-generated version if not found
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if (WriterCompilerDetectionHeaderFound)
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write_compiler_detection_header(
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FILE ${feature_file}
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PREFIX ${target_upper}
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COMPILERS AppleClang Clang GNU MSVC
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FEATURES cxx_alignas cxx_alignof cxx_constexpr cxx_final cxx_noexcept cxx_nullptr cxx_sizeof_member cxx_thread_local
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VERSION 3.2
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)
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else()
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file(
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COPY ${PROJECT_SOURCE_DIR}/codegeneration/${target}_features.h
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DESTINATION ${CMAKE_CURRENT_BINARY_DIR}/include/${target}
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USE_SOURCE_PERMISSIONS
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)
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endif()
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# Create API export header
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generate_export_header(${target}
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EXPORT_FILE_NAME ${export_file}
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EXPORT_MACRO_NAME ${export_macro}
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)
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#
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# Project options
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#
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set_target_properties(${target}
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PROPERTIES
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${DEFAULT_PROJECT_OPTIONS}
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FOLDER "${IDE_FOLDER}"
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BUNDLE $<$<BOOL:${APPLE}>:$<$<VERSION_GREATER:${PROJECT_OS_VERSION},8>>>
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)
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#
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# Include directories
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#
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target_include_directories(${target}
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PRIVATE
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${PROJECT_BINARY_DIR}/source/include
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${CMAKE_CURRENT_SOURCE_DIR}/include
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${CMAKE_CURRENT_BINARY_DIR}/include
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$<TARGET_PROPERTY:${META_PROJECT_NAME}::metacall,INCLUDE_DIRECTORIES> # MetaCall includes
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PUBLIC
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${DEFAULT_INCLUDE_DIRECTORIES}
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INTERFACE
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$<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
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$<BUILD_INTERFACE:${CMAKE_CURRENT_BINARY_DIR}/include>
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$<INSTALL_INTERFACE:include>
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)
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#
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# Libraries
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#
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target_link_libraries(${target}
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PRIVATE
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${META_PROJECT_NAME}::metacall # MetaCall library
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PUBLIC
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${DEFAULT_LIBRARIES}
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INTERFACE
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)
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#
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# Compile definitions
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#
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target_compile_definitions(${target}
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PRIVATE
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PUBLIC
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$<$<NOT:$<BOOL:${BUILD_SHARED_LIBS}>>:${target_upper}_STATIC_DEFINE>
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${DEFAULT_COMPILE_DEFINITIONS}
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INTERFACE
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)
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#
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# Compile options
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#
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target_compile_options(${target}
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PRIVATE
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PUBLIC
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${DEFAULT_COMPILE_OPTIONS}
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INTERFACE
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)
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#
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# Linker options
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#
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target_link_libraries(${target}
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PRIVATE
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PUBLIC
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${DEFAULT_LINKER_OPTIONS}
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INTERFACE
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)
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set_property(TARGET ${target} PROPERTY CXX_STANDARD 17)

‎source/extensions/load_extensions/include/load_extensions/load_extensions.h

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#ifndef LOAD_EXTENSIONS_H
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#define LOAD_EXTENSIONS_H 1
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#include <dynlink/dynlink.h>
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#include <load_extensions/load_extensions_api.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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LOAD_EXTENSIONS_API void load_extensions(void *loader, void *context);
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DYNLINK_SYMBOL_EXPORT(load_extensions);
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#ifdef __cplusplus
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}
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#endif
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#endif //extension.h

‎source/extensions/load_extensions/source/load_extensions.cpp

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#include <load_extensions/load_extensions.h>
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#include <environment/environment_variable_path.h>
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#include <log/log.h>
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#include <metacall/metacall.h>
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#include <assert.h>
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#include <filesystem>
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#include <regex>
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#include <string>
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#define METACALL_EXTENSIONS_PATH "METACALL_EXTENSIONS_PATH" /*ENV Variable for plugin path*/
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namespace fs = std::filesystem;
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std::string get_ext_path()
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{
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/* Initialize the library path */
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const char name[] = "metacall"
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#if (!defined(NDEBUG) || defined(DEBUG) || defined(_DEBUG) || defined(__DEBUG) || defined(__DEBUG__))
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"d"
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#endif
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;
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dynlink_library_path_str path;
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size_t length = 0;
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/* The order of precedence is:
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* 1) Environment variable
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* 2) Dynamic link library path of the host library
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*/
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dynlink_library_path(name, path, &length); //TODO: check return value
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char *lib_path = environment_variable_path_create(METACALL_EXTENSIONS_PATH, path, length + 1, NULL);
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if (!lib_path)
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{
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return "";
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}
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fs::path tmp(lib_path);
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environment_variable_path_destroy(lib_path);
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tmp /= "extensions";
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return tmp.string();
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}
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void load_extensions(void *loader, void *context)
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{
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std::regex metacall_json{ R"(metacall(-.+)?\.json$)" };
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std::string ext_path = get_ext_path();
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if (ext_path.empty())
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{
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/*TODO: log*/
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assert(!"Failed to get metacall lib path");
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}
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struct metacall_allocator_std_type std_ctx = { &std::malloc, &std::realloc, &std::free };
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void *config_allocator = metacall_allocator_create(METACALL_ALLOCATOR_STD, (void *)&std_ctx);
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auto i = fs::recursive_directory_iterator(ext_path);
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while (i != fs::recursive_directory_iterator())
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{
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if (i.depth() == 2)
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i.disable_recursion_pending();
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fs::directory_entry dir(*i);
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if (dir.is_regular_file())
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{
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if (std::regex_match(dir.path().filename().c_str(), metacall_json))
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{
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metacall_load_from_configuration(dir.path().c_str(), NULL, config_allocator);
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i.pop();
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continue;
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}
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}
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i++;
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}
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metacall_allocator_destroy(config_allocator);
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}

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