| # CMake script that writes version control information to a header. |
| # |
| # Input variables: |
| # NAMES - A list of names for each of the source directories. |
| # <NAME>_SOURCE_DIR - A path to source directory for each name in NAMES. |
| # HEADER_FILE - The header file to write |
| # |
| # The output header will contain macros <NAME>_REPOSITORY and <NAME>_REVISION, |
| # where "<NAME>" is substituted with the names specified in the input variables, |
| # for each of the <NAME>_SOURCE_DIR given. |
| |
| get_filename_component(LLVM_CMAKE_DIR "${CMAKE_SCRIPT_MODE_FILE}" PATH) |
| |
| list(APPEND CMAKE_MODULE_PATH "${LLVM_CMAKE_DIR}") |
| |
| include(VersionFromVCS) |
| |
| # Handle strange terminals |
| set(ENV{TERM} "dumb") |
| |
| function(append_info name path) |
| if(path) |
| get_source_info("${path}" revision repository) |
| endif() |
| if(revision) |
| file(APPEND "${HEADER_FILE}.tmp" |
| "#define ${name}_REVISION \"${revision}\"\n") |
| else() |
| file(APPEND "${HEADER_FILE}.tmp" |
| "#undef ${name}_REVISION\n") |
| endif() |
| if(repository) |
| file(APPEND "${HEADER_FILE}.tmp" |
| "#define ${name}_REPOSITORY \"${repository}\"\n") |
| else() |
| file(APPEND "${HEADER_FILE}.tmp" |
| "#undef ${name}_REPOSITORY\n") |
| endif() |
| endfunction() |
| |
| foreach(name IN LISTS NAMES) |
| if(NOT DEFINED ${name}_SOURCE_DIR) |
| message(FATAL_ERROR "${name}_SOURCE_DIR is not defined") |
| endif() |
| append_info(${name} "${${name}_SOURCE_DIR}") |
| endforeach() |
| |
| # Copy the file only if it has changed. |
| execute_process(COMMAND ${CMAKE_COMMAND} -E copy_if_different |
| "${HEADER_FILE}.tmp" "${HEADER_FILE}") |
| file(REMOVE "${HEADER_FILE}.tmp") |