diff options
Diffstat (limited to 'cmake/cmkr/cmkr.cmake')
| -rw-r--r-- | cmake/cmkr/cmkr.cmake | 222 |
1 files changed, 222 insertions, 0 deletions
diff --git a/cmake/cmkr/cmkr.cmake b/cmake/cmkr/cmkr.cmake new file mode 100644 index 0000000..1ed1435 --- /dev/null +++ b/cmake/cmkr/cmkr.cmake @@ -0,0 +1,222 @@ +include_guard() + +# Change these defaults to point to your infrastructure if desired +set(CMKR_REPO "https://github.com/build-cpp/cmkr" CACHE STRING "cmkr git repository" FORCE) +set(CMKR_TAG "v0.2.7" CACHE STRING "cmkr git tag (this needs to be available forever)" FORCE) + +# To bootstrap/generate a cmkr project: cmake -P cmkr.cmake +if(CMAKE_SCRIPT_MODE_FILE) + set(CMAKE_BINARY_DIR "${CMAKE_BINARY_DIR}/build") + set(CMAKE_CURRENT_BINARY_DIR "${CMAKE_BINARY_DIR}") + file(MAKE_DIRECTORY "${CMAKE_BINARY_DIR}") +endif() + +# Set these from the command line to customize for development/debugging purposes +set(CMKR_EXECUTABLE "" CACHE FILEPATH "cmkr executable") +set(CMKR_SKIP_GENERATION OFF CACHE BOOL "skip automatic cmkr generation") +set(CMKR_BUILD_TYPE "Debug" CACHE STRING "cmkr build configuration") + +# Disable cmkr if generation is disabled +if(DEFINED ENV{CI} OR CMKR_SKIP_GENERATION OR CMKR_BUILD_SKIP_GENERATION) + message(STATUS "[cmkr] Skipping automatic cmkr generation") + unset(CMKR_BUILD_SKIP_GENERATION CACHE) + macro(cmkr) + endmacro() + return() +endif() + +# Disable cmkr if no cmake.toml file is found +if(NOT CMAKE_SCRIPT_MODE_FILE AND NOT EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/cmake.toml") + message(AUTHOR_WARNING "[cmkr] Not found: ${CMAKE_CURRENT_SOURCE_DIR}/cmake.toml") + macro(cmkr) + endmacro() + return() +endif() + +# Convert a Windows native path to CMake path +if(CMKR_EXECUTABLE MATCHES "\\\\") + string(REPLACE "\\" "/" CMKR_EXECUTABLE_CMAKE "${CMKR_EXECUTABLE}") + set(CMKR_EXECUTABLE "${CMKR_EXECUTABLE_CMAKE}" CACHE FILEPATH "" FORCE) + unset(CMKR_EXECUTABLE_CMAKE) +endif() + +# Helper macro to execute a process (COMMAND_ERROR_IS_FATAL ANY is 3.19 and higher) +function(cmkr_exec) + execute_process(COMMAND ${ARGV} RESULT_VARIABLE CMKR_EXEC_RESULT) + if(NOT CMKR_EXEC_RESULT EQUAL 0) + message(FATAL_ERROR "cmkr_exec(${ARGV}) failed (exit code ${CMKR_EXEC_RESULT})") + endif() +endfunction() + +# Windows-specific hack (CMAKE_EXECUTABLE_PREFIX is not set at the moment) +if(WIN32) + set(CMKR_EXECUTABLE_NAME "cmkr.exe") +else() + set(CMKR_EXECUTABLE_NAME "cmkr") +endif() + +# Use cached cmkr if found +if(DEFINED ENV{CMKR_CACHE} AND EXISTS "$ENV{CMKR_CACHE}") + set(CMKR_DIRECTORY_PREFIX "$ENV{CMKR_CACHE}") + string(REPLACE "\\" "/" CMKR_DIRECTORY_PREFIX "${CMKR_DIRECTORY_PREFIX}") + if(NOT CMKR_DIRECTORY_PREFIX MATCHES "\\/$") + set(CMKR_DIRECTORY_PREFIX "${CMKR_DIRECTORY_PREFIX}/") + endif() +else() + set(CMKR_DIRECTORY_PREFIX "${CMAKE_CURRENT_BINARY_DIR}/_cmkr_") +endif() +set(CMKR_DIRECTORY "${CMKR_DIRECTORY_PREFIX}${CMKR_TAG}") +set(CMKR_CACHED_EXECUTABLE "${CMKR_DIRECTORY}/bin/${CMKR_EXECUTABLE_NAME}") + +# Handle upgrading logic +if(CMKR_EXECUTABLE AND NOT CMKR_CACHED_EXECUTABLE STREQUAL CMKR_EXECUTABLE) + if(CMKR_EXECUTABLE MATCHES "^${CMAKE_CURRENT_BINARY_DIR}/_cmkr") + if(DEFINED ENV{CMKR_CACHE} AND EXISTS "$ENV{CMKR_CACHE}") + message(AUTHOR_WARNING "[cmkr] Switching to cached cmkr: '${CMKR_CACHED_EXECUTABLE}'") + if(EXISTS "${CMKR_CACHED_EXECUTABLE}") + set(CMKR_EXECUTABLE "${CMKR_CACHED_EXECUTABLE}" CACHE FILEPATH "Full path to cmkr executable" FORCE) + else() + unset(CMKR_EXECUTABLE CACHE) + endif() + else() + message(AUTHOR_WARNING "[cmkr] Upgrading '${CMKR_EXECUTABLE}' to '${CMKR_CACHED_EXECUTABLE}'") + unset(CMKR_EXECUTABLE CACHE) + endif() + elseif(DEFINED ENV{CMKR_CACHE} AND EXISTS "$ENV{CMKR_CACHE}" AND CMKR_EXECUTABLE MATCHES "^${CMKR_DIRECTORY_PREFIX}") + message(AUTHOR_WARNING "[cmkr] Upgrading cached '${CMKR_EXECUTABLE}' to '${CMKR_CACHED_EXECUTABLE}'") + unset(CMKR_EXECUTABLE CACHE) + endif() +endif() + +if(CMKR_EXECUTABLE AND EXISTS "${CMKR_EXECUTABLE}") + message(VERBOSE "[cmkr] Found cmkr: '${CMKR_EXECUTABLE}'") +elseif(CMKR_EXECUTABLE AND NOT CMKR_EXECUTABLE STREQUAL CMKR_CACHED_EXECUTABLE) + message(FATAL_ERROR "[cmkr] '${CMKR_EXECUTABLE}' not found") +elseif(NOT CMKR_EXECUTABLE AND EXISTS "${CMKR_CACHED_EXECUTABLE}") + set(CMKR_EXECUTABLE "${CMKR_CACHED_EXECUTABLE}" CACHE FILEPATH "Full path to cmkr executable" FORCE) + message(STATUS "[cmkr] Found cached cmkr: '${CMKR_EXECUTABLE}'") +else() + set(CMKR_EXECUTABLE "${CMKR_CACHED_EXECUTABLE}" CACHE FILEPATH "Full path to cmkr executable" FORCE) + message(VERBOSE "[cmkr] Bootstrapping '${CMKR_EXECUTABLE}'") + + message(STATUS "[cmkr] Fetching cmkr...") + if(EXISTS "${CMKR_DIRECTORY}") + cmkr_exec("${CMAKE_COMMAND}" -E rm -rf "${CMKR_DIRECTORY}") + endif() + find_package(Git QUIET REQUIRED) + cmkr_exec("${GIT_EXECUTABLE}" + clone + --config advice.detachedHead=false + --branch ${CMKR_TAG} + --depth 1 + ${CMKR_REPO} + "${CMKR_DIRECTORY}" + ) + message(STATUS "[cmkr] Building cmkr (using system compiler)...") + cmkr_exec("${CMAKE_COMMAND}" + --no-warn-unused-cli + "${CMKR_DIRECTORY}" + "-B${CMKR_DIRECTORY}/build" + "-DCMAKE_BUILD_TYPE=${CMKR_BUILD_TYPE}" + "-DCMAKE_UNITY_BUILD=ON" + "-DCMAKE_INSTALL_PREFIX=${CMKR_DIRECTORY}" + "-DCMKR_GENERATE_DOCUMENTATION=OFF" + ) + cmkr_exec("${CMAKE_COMMAND}" + --build "${CMKR_DIRECTORY}/build" + --config "${CMKR_BUILD_TYPE}" + --parallel + ) + cmkr_exec("${CMAKE_COMMAND}" + --install "${CMKR_DIRECTORY}/build" + --config "${CMKR_BUILD_TYPE}" + --prefix "${CMKR_DIRECTORY}" + --component cmkr + ) + if(NOT EXISTS ${CMKR_EXECUTABLE}) + message(FATAL_ERROR "[cmkr] Failed to bootstrap '${CMKR_EXECUTABLE}'") + endif() + cmkr_exec("${CMKR_EXECUTABLE}" version) + message(STATUS "[cmkr] Bootstrapped ${CMKR_EXECUTABLE}") +endif() +execute_process(COMMAND "${CMKR_EXECUTABLE}" version + RESULT_VARIABLE CMKR_EXEC_RESULT +) +if(NOT CMKR_EXEC_RESULT EQUAL 0) + message(FATAL_ERROR "[cmkr] Failed to get version, try clearing the cache and rebuilding") +endif() + +# Use cmkr.cmake as a script +if(CMAKE_SCRIPT_MODE_FILE) + if(NOT EXISTS "${CMAKE_SOURCE_DIR}/cmake.toml") + execute_process(COMMAND "${CMKR_EXECUTABLE}" init + RESULT_VARIABLE CMKR_EXEC_RESULT + ) + if(NOT CMKR_EXEC_RESULT EQUAL 0) + message(FATAL_ERROR "[cmkr] Failed to bootstrap cmkr project. Please report an issue: https://github.com/build-cpp/cmkr/issues/new") + else() + message(STATUS "[cmkr] Modify cmake.toml and then configure using: cmake -B build") + endif() + else() + execute_process(COMMAND "${CMKR_EXECUTABLE}" gen + RESULT_VARIABLE CMKR_EXEC_RESULT + ) + if(NOT CMKR_EXEC_RESULT EQUAL 0) + message(FATAL_ERROR "[cmkr] Failed to generate project.") + else() + message(STATUS "[cmkr] Configure using: cmake -B build") + endif() + endif() +endif() + +# This is the macro that contains black magic +macro(cmkr) + # When this macro is called from the generated file, fake some internal CMake variables + get_source_file_property(CMKR_CURRENT_LIST_FILE "${CMAKE_CURRENT_LIST_FILE}" CMKR_CURRENT_LIST_FILE) + if(CMKR_CURRENT_LIST_FILE) + set(CMAKE_CURRENT_LIST_FILE "${CMKR_CURRENT_LIST_FILE}") + get_filename_component(CMAKE_CURRENT_LIST_DIR "${CMAKE_CURRENT_LIST_FILE}" DIRECTORY) + endif() + + # File-based include guard (include_guard is not documented to work) + get_source_file_property(CMKR_INCLUDE_GUARD "${CMAKE_CURRENT_LIST_FILE}" CMKR_INCLUDE_GUARD) + if(NOT CMKR_INCLUDE_GUARD) + set_source_files_properties("${CMAKE_CURRENT_LIST_FILE}" PROPERTIES CMKR_INCLUDE_GUARD TRUE) + + file(SHA256 "${CMAKE_CURRENT_LIST_FILE}" CMKR_LIST_FILE_SHA256_PRE) + + # Generate CMakeLists.txt + cmkr_exec("${CMKR_EXECUTABLE}" gen + WORKING_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}" + ) + + file(SHA256 "${CMAKE_CURRENT_LIST_FILE}" CMKR_LIST_FILE_SHA256_POST) + + # Delete the temporary file if it was left for some reason + set(CMKR_TEMP_FILE "${CMAKE_CURRENT_SOURCE_DIR}/CMakerLists.txt") + if(EXISTS "${CMKR_TEMP_FILE}") + file(REMOVE "${CMKR_TEMP_FILE}") + endif() + + if(NOT CMKR_LIST_FILE_SHA256_PRE STREQUAL CMKR_LIST_FILE_SHA256_POST) + # Copy the now-generated CMakeLists.txt to CMakerLists.txt + # This is done because you cannot include() a file you are currently in + configure_file(CMakeLists.txt "${CMKR_TEMP_FILE}" COPYONLY) + + # Add the macro required for the hack at the start of the cmkr macro + set_source_files_properties("${CMKR_TEMP_FILE}" PROPERTIES + CMKR_CURRENT_LIST_FILE "${CMAKE_CURRENT_LIST_FILE}" + ) + + # 'Execute' the newly-generated CMakeLists.txt + include("${CMKR_TEMP_FILE}") + + # Delete the generated file + file(REMOVE "${CMKR_TEMP_FILE}") + + # Do not execute the rest of the original CMakeLists.txt + return() + endif() + # Resume executing the unmodified CMakeLists.txt + endif() +endmacro() |