1 # - Returns a version string from Git 2 # 3 # These functions force a re-configure on each git commit so that you can 4 # trust the values of the variables in your build system. 5 # 6 # get_git_head_revision(<refspecvar> <hashvar> [<additional arguments to git describe> ...]) 7 # 8 # Returns the refspec and sha hash of the current head revision 9 # 10 # git_describe(<var> [<additional arguments to git describe> ...]) 11 # 12 # Returns the results of git describe on the source tree, and adjusting 13 # the output so that it tests false if an error occurs. 14 # 15 # git_get_exact_tag(<var> [<additional arguments to git describe> ...]) 16 # 17 # Returns the results of git describe --exact-match on the source tree, 18 # and adjusting the output so that it tests false if there was no exact 19 # matching tag. 20 # 21 # Requires CMake 2.6 or newer (uses the 'function' command) 22 # 23 # Original Author: 24 # 2009-2010 Ryan Pavlik <rpavlik (a] iastate.edu> <abiryan (a] ryand.net> 25 # http://academic.cleardefinition.com 26 # Iowa State University HCI Graduate Program/VRAC 27 # 28 # Copyright Iowa State University 2009-2010. 29 # Distributed under the Boost Software License, Version 1.0. 30 # (See accompanying file LICENSE_1_0.txt or copy at 31 # http://www.boost.org/LICENSE_1_0.txt) 32 33 if(__get_git_revision_description) 34 return() 35 endif() 36 set(__get_git_revision_description YES) 37 38 # We must run the following at "include" time, not at function call time, 39 # to find the path to this module rather than the path to a calling list file 40 get_filename_component(_gitdescmoddir ${CMAKE_CURRENT_LIST_FILE} PATH) 41 42 function(get_git_head_revision _refspecvar _hashvar) 43 set(GIT_PARENT_DIR "${CMAKE_CURRENT_SOURCE_DIR}") 44 set(GIT_DIR "${GIT_PARENT_DIR}/.git") 45 while(NOT EXISTS "${GIT_DIR}") # .git dir not found, search parent directories 46 set(GIT_PREVIOUS_PARENT "${GIT_PARENT_DIR}") 47 get_filename_component(GIT_PARENT_DIR ${GIT_PARENT_DIR} PATH) 48 if(GIT_PARENT_DIR STREQUAL GIT_PREVIOUS_PARENT) 49 # We have reached the root directory, we are not in git 50 set(${_refspecvar} "GITDIR-NOTFOUND" PARENT_SCOPE) 51 set(${_hashvar} "GITDIR-NOTFOUND" PARENT_SCOPE) 52 return() 53 endif() 54 set(GIT_DIR "${GIT_PARENT_DIR}/.git") 55 endwhile() 56 # check if this is a submodule 57 if(NOT IS_DIRECTORY ${GIT_DIR}) 58 file(READ ${GIT_DIR} submodule) 59 string(REGEX REPLACE "gitdir: (.*)\n$" "\\1" GIT_DIR_RELATIVE ${submodule}) 60 get_filename_component(SUBMODULE_DIR ${GIT_DIR} PATH) 61 get_filename_component(GIT_DIR ${SUBMODULE_DIR}/${GIT_DIR_RELATIVE} ABSOLUTE) 62 endif() 63 set(GIT_DATA "${CMAKE_CURRENT_BINARY_DIR}/CMakeFiles/git-data") 64 if(NOT EXISTS "${GIT_DATA}") 65 file(MAKE_DIRECTORY "${GIT_DATA}") 66 endif() 67 68 if(NOT EXISTS "${GIT_DIR}/HEAD") 69 return() 70 endif() 71 set(HEAD_FILE "${GIT_DATA}/HEAD") 72 configure_file("${GIT_DIR}/HEAD" "${HEAD_FILE}" COPYONLY) 73 74 configure_file("${_gitdescmoddir}/GetGitRevisionDescription.cmake.in" 75 "${GIT_DATA}/grabRef.cmake" 76 @ONLY) 77 include("${GIT_DATA}/grabRef.cmake") 78 79 set(${_refspecvar} "${HEAD_REF}" PARENT_SCOPE) 80 set(${_hashvar} "${HEAD_HASH}" PARENT_SCOPE) 81 endfunction() 82 83 function(git_describe _var) 84 if(NOT GIT_FOUND) 85 find_package(Git QUIET) 86 endif() 87 get_git_head_revision(refspec hash) 88 if(NOT GIT_FOUND) 89 set(${_var} "GIT-NOTFOUND" PARENT_SCOPE) 90 return() 91 endif() 92 if(NOT hash) 93 set(${_var} "HEAD-HASH-NOTFOUND" PARENT_SCOPE) 94 return() 95 endif() 96 97 # TODO sanitize 98 #if((${ARGN}" MATCHES "&&") OR 99 # (ARGN MATCHES "||") OR 100 # (ARGN MATCHES "\\;")) 101 # message("Please report the following error to the project!") 102 # message(FATAL_ERROR "Looks like someone's doing something nefarious with git_describe! Passed arguments ${ARGN}") 103 #endif() 104 105 #message(STATUS "Arguments to execute_process: ${ARGN}") 106 107 execute_process(COMMAND 108 "${GIT_EXECUTABLE}" 109 describe 110 ${hash} 111 ${ARGN} 112 WORKING_DIRECTORY 113 "${CMAKE_SOURCE_DIR}" 114 RESULT_VARIABLE 115 res 116 OUTPUT_VARIABLE 117 out 118 ERROR_QUIET 119 OUTPUT_STRIP_TRAILING_WHITESPACE) 120 if(NOT res EQUAL 0) 121 set(out "${out}-${res}-NOTFOUND") 122 endif() 123 124 set(${_var} "${out}" PARENT_SCOPE) 125 endfunction() 126 127 function(git_get_exact_tag _var) 128 git_describe(out --exact-match ${ARGN}) 129 set(${_var} "${out}" PARENT_SCOPE) 130 endfunction() 131
