| Andrew Walbran | 16937d0 | 2019-10-22 13:54:20 +0100 | [diff] [blame] | 1 | # CMake script that writes version control information to a header. |
| 2 | # |
| 3 | # Input variables: |
| 4 | # NAMES - A list of names for each of the source directories. |
| 5 | # <NAME>_SOURCE_DIR - A path to source directory for each name in NAMES. |
| 6 | # HEADER_FILE - The header file to write |
| 7 | # |
| 8 | # The output header will contain macros <NAME>_REPOSITORY and <NAME>_REVISION, |
| 9 | # where "<NAME>" is substituted with the names specified in the input variables, |
| 10 | # for each of the <NAME>_SOURCE_DIR given. |
| 11 | |
| 12 | get_filename_component(LLVM_CMAKE_DIR "${CMAKE_SCRIPT_MODE_FILE}" PATH) |
| 13 | |
| 14 | list(APPEND CMAKE_MODULE_PATH "${LLVM_CMAKE_DIR}") |
| 15 | |
| 16 | include(VersionFromVCS) |
| 17 | |
| 18 | # Handle strange terminals |
| 19 | set(ENV{TERM} "dumb") |
| 20 | |
| 21 | function(append_info name path) |
| 22 | if(path) |
| 23 | get_source_info("${path}" revision repository) |
| 24 | endif() |
| 25 | if(revision) |
| 26 | file(APPEND "${HEADER_FILE}.tmp" |
| 27 | "#define ${name}_REVISION \"${revision}\"\n") |
| 28 | else() |
| 29 | file(APPEND "${HEADER_FILE}.tmp" |
| 30 | "#undef ${name}_REVISION\n") |
| 31 | endif() |
| 32 | if(repository) |
| 33 | file(APPEND "${HEADER_FILE}.tmp" |
| 34 | "#define ${name}_REPOSITORY \"${repository}\"\n") |
| 35 | else() |
| 36 | file(APPEND "${HEADER_FILE}.tmp" |
| 37 | "#undef ${name}_REPOSITORY\n") |
| 38 | endif() |
| 39 | endfunction() |
| 40 | |
| 41 | foreach(name IN LISTS NAMES) |
| 42 | if(NOT DEFINED ${name}_SOURCE_DIR) |
| 43 | message(FATAL_ERROR "${name}_SOURCE_DIR is not defined") |
| 44 | endif() |
| 45 | append_info(${name} "${${name}_SOURCE_DIR}") |
| 46 | endforeach() |
| 47 | |
| 48 | # Copy the file only if it has changed. |
| 49 | execute_process(COMMAND ${CMAKE_COMMAND} -E copy_if_different |
| 50 | "${HEADER_FILE}.tmp" "${HEADER_FILE}") |
| 51 | file(REMOVE "${HEADER_FILE}.tmp") |