| # Go is an optional dependency. It's a necessary dependency if running tests or |
| # the FIPS build, which will check these. |
| find_program(GO_EXECUTABLE go) |
| |
| function(require_go) |
| if(NOT GO_EXECUTABLE) |
| message(FATAL_ERROR "Could not find Go") |
| endif() |
| endfunction() |
| |
| function(go_executable dest package) |
| require_go() |
| set(godeps "${PROJECT_SOURCE_DIR}/util/godeps.go") |
| if(NOT CMAKE_GENERATOR STREQUAL "Ninja") |
| # The DEPFILE parameter to add_custom_command only works with Ninja. Query |
| # the sources at configure time. Additionally, everything depends on go.mod. |
| # That affects what external packages to use. |
| # |
| # TODO(davidben): Starting CMake 3.20, it also works with Make. Starting |
| # 3.21, it works with Visual Studio and Xcode too. |
| execute_process(COMMAND ${GO_EXECUTABLE} run ${godeps} -format cmake |
| -pkg ${package} |
| WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR} |
| OUTPUT_VARIABLE sources |
| RESULT_VARIABLE godeps_result) |
| add_custom_command(OUTPUT ${dest} |
| COMMAND ${GO_EXECUTABLE} build |
| -o ${CMAKE_CURRENT_BINARY_DIR}/${dest} ${package} |
| WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR} |
| DEPENDS ${sources} ${PROJECT_SOURCE_DIR}/go.mod) |
| else() |
| # Ninja expects the target in the depfile to match the output. This is a |
| # relative path from the build directory. |
| binary_dir_relative_path(${dest} target) |
| |
| set(depfile "${CMAKE_CURRENT_BINARY_DIR}/${dest}.d") |
| add_custom_command(OUTPUT ${dest} |
| COMMAND ${GO_EXECUTABLE} build |
| -o ${CMAKE_CURRENT_BINARY_DIR}/${dest} ${package} |
| COMMAND ${GO_EXECUTABLE} run ${godeps} -format depfile |
| -target ${target} -pkg ${package} -out ${depfile} |
| WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR} |
| DEPENDS ${godeps} ${PROJECT_SOURCE_DIR}/go.mod |
| DEPFILE ${depfile}) |
| endif() |
| endfunction() |
| |
