John Doe
3 years ago
parent
2747e8f073
commit
dff4679eee
@ -0,0 +1,162 @@
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include_guard()
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# Change these defaults to point to your infrastructure if desired
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set(CMKR_REPO "https://github.com/build-cpp/cmkr" CACHE STRING "cmkr git repository" FORCE)
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set(CMKR_TAG "archive_264e4ace" CACHE STRING "cmkr git tag (this needs to be available forever)" FORCE)
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# Set these from the command line to customize for development/debugging purposes
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set(CMKR_EXECUTABLE "" CACHE FILEPATH "cmkr executable")
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set(CMKR_SKIP_GENERATION OFF CACHE BOOL "skip automatic cmkr generation")
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# Disable cmkr if generation is disabled
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if(DEFINED ENV{CI} OR CMKR_SKIP_GENERATION)
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message(STATUS "[cmkr] Skipping automatic cmkr generation")
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macro(cmkr)
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endmacro()
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return()
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endif()
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# Disable cmkr if no cmake.toml file is found
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if(NOT EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/cmake.toml")
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message(AUTHOR_WARNING "[cmkr] Not found: ${CMAKE_CURRENT_SOURCE_DIR}/cmake.toml")
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macro(cmkr)
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endmacro()
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return()
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endif()
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# Convert a Windows native path to CMake path
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if(CMKR_EXECUTABLE MATCHES "\\\\")
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string(REPLACE "\\" "/" CMKR_EXECUTABLE_CMAKE "${CMKR_EXECUTABLE}")
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set(CMKR_EXECUTABLE "${CMKR_EXECUTABLE_CMAKE}" CACHE FILEPATH "" FORCE)
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unset(CMKR_EXECUTABLE_CMAKE)
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endif()
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# Helper macro to execute a process (COMMAND_ERROR_IS_FATAL ANY is 3.19 and higher)
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function(cmkr_exec)
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execute_process(COMMAND ${ARGV} RESULT_VARIABLE CMKR_EXEC_RESULT)
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if(NOT CMKR_EXEC_RESULT EQUAL 0)
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message(FATAL_ERROR "cmkr_exec(${ARGV}) failed (exit code ${CMKR_EXEC_RESULT})")
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endif()
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endfunction()
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# Windows-specific hack (CMAKE_EXECUTABLE_PREFIX is not set at the moment)
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if(WIN32)
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set(CMKR_EXECUTABLE_NAME "cmkr.exe")
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else()
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set(CMKR_EXECUTABLE_NAME "cmkr")
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endif()
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# Use cached cmkr if found
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set(CMKR_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}/_cmkr_${CMKR_TAG}")
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set(CMKR_CACHED_EXECUTABLE "${CMKR_DIRECTORY}/bin/${CMKR_EXECUTABLE_NAME}")
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if(NOT CMKR_CACHED_EXECUTABLE STREQUAL CMKR_EXECUTABLE AND CMKR_EXECUTABLE MATCHES "^${CMAKE_CURRENT_BINARY_DIR}/_cmkr")
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message(AUTHOR_WARNING "[cmkr] Upgrading '${CMKR_EXECUTABLE}' to '${CMKR_CACHED_EXECUTABLE}'")
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unset(CMKR_EXECUTABLE CACHE)
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endif()
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if(CMKR_EXECUTABLE AND EXISTS "${CMKR_EXECUTABLE}")
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message(VERBOSE "[cmkr] Found cmkr: '${CMKR_EXECUTABLE}'")
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elseif(CMKR_EXECUTABLE AND NOT CMKR_EXECUTABLE STREQUAL CMKR_CACHED_EXECUTABLE)
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message(FATAL_ERROR "[cmkr] '${CMKR_EXECUTABLE}' not found")
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else()
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set(CMKR_EXECUTABLE "${CMKR_CACHED_EXECUTABLE}" CACHE FILEPATH "Full path to cmkr executable" FORCE)
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message(VERBOSE "[cmkr] Bootstrapping '${CMKR_EXECUTABLE}'")
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message(STATUS "[cmkr] Fetching cmkr...")
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if(EXISTS "${CMKR_DIRECTORY}")
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cmkr_exec("${CMAKE_COMMAND}" -E rm -rf "${CMKR_DIRECTORY}")
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endif()
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find_package(Git QUIET REQUIRED)
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cmkr_exec("${GIT_EXECUTABLE}"
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clone
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--config advice.detachedHead=false
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--branch ${CMKR_TAG}
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--depth 1
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${CMKR_REPO}
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"${CMKR_DIRECTORY}"
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)
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message(STATUS "[cmkr] Building cmkr...")
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cmkr_exec("${CMAKE_COMMAND}"
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--no-warn-unused-cli
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"${CMKR_DIRECTORY}"
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"-B${CMKR_DIRECTORY}/build"
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"-DCMAKE_BUILD_TYPE=Release"
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"-DCMAKE_INSTALL_PREFIX=${CMKR_DIRECTORY}"
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"-DCMKR_GENERATE_DOCUMENTATION=OFF"
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)
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cmkr_exec("${CMAKE_COMMAND}"
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--build "${CMKR_DIRECTORY}/build"
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--config Release
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--parallel
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)
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cmkr_exec("${CMAKE_COMMAND}"
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--install "${CMKR_DIRECTORY}/build"
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--config Release
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--prefix "${CMKR_DIRECTORY}"
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--component cmkr
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)
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if(NOT EXISTS ${CMKR_EXECUTABLE})
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message(FATAL_ERROR "[cmkr] Failed to bootstrap '${CMKR_EXECUTABLE}'")
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endif()
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cmkr_exec("${CMKR_EXECUTABLE}" version)
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message(STATUS "[cmkr] Bootstrapped ${CMKR_EXECUTABLE}")
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endif()
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execute_process(COMMAND "${CMKR_EXECUTABLE}" version
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RESULT_VARIABLE CMKR_EXEC_RESULT
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)
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if(NOT CMKR_EXEC_RESULT EQUAL 0)
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message(FATAL_ERROR "[cmkr] Failed to get version, try clearing the cache and rebuilding")
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endif()
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# This is the macro that contains black magic
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macro(cmkr)
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# When this macro is called from the generated file, fake some internal CMake variables
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get_source_file_property(CMKR_CURRENT_LIST_FILE "${CMAKE_CURRENT_LIST_FILE}" CMKR_CURRENT_LIST_FILE)
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if(CMKR_CURRENT_LIST_FILE)
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set(CMAKE_CURRENT_LIST_FILE "${CMKR_CURRENT_LIST_FILE}")
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get_filename_component(CMAKE_CURRENT_LIST_DIR "${CMAKE_CURRENT_LIST_FILE}" DIRECTORY)
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endif()
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# File-based include guard (include_guard is not documented to work)
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get_source_file_property(CMKR_INCLUDE_GUARD "${CMAKE_CURRENT_LIST_FILE}" CMKR_INCLUDE_GUARD)
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if(NOT CMKR_INCLUDE_GUARD)
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set_source_files_properties("${CMAKE_CURRENT_LIST_FILE}" PROPERTIES CMKR_INCLUDE_GUARD TRUE)
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file(SHA256 "${CMAKE_CURRENT_LIST_FILE}" CMKR_LIST_FILE_SHA256_PRE)
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# Generate CMakeLists.txt
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cmkr_exec("${CMKR_EXECUTABLE}" gen
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WORKING_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}"
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)
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file(SHA256 "${CMAKE_CURRENT_LIST_FILE}" CMKR_LIST_FILE_SHA256_POST)
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# Delete the temporary file if it was left for some reason
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set(CMKR_TEMP_FILE "${CMAKE_CURRENT_SOURCE_DIR}/CMakerLists.txt")
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if(EXISTS "${CMKR_TEMP_FILE}")
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file(REMOVE "${CMKR_TEMP_FILE}")
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endif()
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if(NOT CMKR_LIST_FILE_SHA256_PRE STREQUAL CMKR_LIST_FILE_SHA256_POST)
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# Copy the now-generated CMakeLists.txt to CMakerLists.txt
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# This is done because you cannot include() a file you are currently in
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configure_file(CMakeLists.txt "${CMKR_TEMP_FILE}" COPYONLY)
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# Add the macro required for the hack at the start of the cmkr macro
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set_source_files_properties("${CMKR_TEMP_FILE}" PROPERTIES
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CMKR_CURRENT_LIST_FILE "${CMAKE_CURRENT_LIST_FILE}"
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)
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# 'Execute' the newly-generated CMakeLists.txt
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include("${CMKR_TEMP_FILE}")
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# Delete the generated file
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file(REMOVE "${CMKR_TEMP_FILE}")
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# Do not execute the rest of the original CMakeLists.txt
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return()
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endif()
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# Resume executing the unmodified CMakeLists.txt
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endif()
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endmacro()
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@ -0,0 +1 @@
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// private entity
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