diff options
Diffstat (limited to 'cmake/GetGitRevisionDescription.cmake')
| -rw-r--r-- | cmake/GetGitRevisionDescription.cmake | 141 |
1 files changed, 141 insertions, 0 deletions
diff --git a/cmake/GetGitRevisionDescription.cmake b/cmake/GetGitRevisionDescription.cmake new file mode 100644 index 0000000..5e0847b --- /dev/null +++ b/cmake/GetGitRevisionDescription.cmake @@ -0,0 +1,141 @@ +# - Returns a version string from Git +# +# These functions force a re-configure on each git commit so that you can +# trust the values of the variables in your build system. +# +# get_git_head_revision(<refspecvar> <hashvar> [<additional arguments to git describe> ...]) +# +# Returns the refspec and sha hash of the current head revision +# +# git_describe(<var> [<additional arguments to git describe> ...]) +# +# Returns the results of git describe on the source tree, and adjusting +# the output so that it tests false if an error occurs. +# +# git_get_exact_tag(<var> [<additional arguments to git describe> ...]) +# +# Returns the results of git describe --exact-match on the source tree, +# and adjusting the output so that it tests false if there was no exact +# matching tag. +# +# Requires CMake 2.6 or newer (uses the 'function' command) +# +# Original Author: +# 2009-2010 Ryan Pavlik <rpavlik@iastate.edu> <abiryan@ryand.net> +# http://academic.cleardefinition.com +# Iowa State University HCI Graduate Program/VRAC +# +# Copyright Iowa State University 2009-2010. +# Distributed under the Boost Software License, Version 1.0. +# (See accompanying file LICENSE_1_0.txt or copy at +# http://www.boost.org/LICENSE_1_0.txt) + +if(__get_git_revision_description) + return() +endif() +set(__get_git_revision_description YES) + +# We must run the following at "include" time, not at function call time, +# to find the path to this module rather than the path to a calling list file +get_filename_component(_gitdescmoddir ${CMAKE_CURRENT_LIST_FILE} PATH) + +function(get_git_head_revision _refspecvar _hashvar) + set(GIT_PARENT_DIR "${CMAKE_CURRENT_SOURCE_DIR}") + set(GIT_DIR "${GIT_PARENT_DIR}/.git") + while(NOT EXISTS "${GIT_DIR}") # .git dir not found, search parent directories + set(GIT_PREVIOUS_PARENT "${GIT_PARENT_DIR}") + get_filename_component(GIT_PARENT_DIR ${GIT_PARENT_DIR} PATH) + if(GIT_PARENT_DIR STREQUAL GIT_PREVIOUS_PARENT) + # We have reached the root directory, we are not in git + set(${_refspecvar} "GITDIR-NOTFOUND" PARENT_SCOPE) + set(${_hashvar} "GITDIR-NOTFOUND" PARENT_SCOPE) + return() + endif() + set(GIT_DIR "${GIT_PARENT_DIR}/.git") + endwhile() + # check if this is a submodule + if(NOT IS_DIRECTORY ${GIT_DIR}) + file(READ ${GIT_DIR} submodule) + string(REGEX REPLACE "gitdir: (.*)\n$" "\\1" GIT_DIR_RELATIVE ${submodule}) + get_filename_component(SUBMODULE_DIR ${GIT_DIR} PATH) + get_filename_component(GIT_DIR ${SUBMODULE_DIR}/${GIT_DIR_RELATIVE} ABSOLUTE) + endif() + set(GIT_DATA "${CMAKE_CURRENT_BINARY_DIR}/CMakeFiles/git-data") + if(NOT EXISTS "${GIT_DATA}") + file(MAKE_DIRECTORY "${GIT_DATA}") + endif() + + if(NOT EXISTS "${GIT_DIR}/HEAD") + return() + endif() + set(HEAD_FILE "${GIT_DATA}/HEAD") + configure_file("${GIT_DIR}/HEAD" "${HEAD_FILE}" COPYONLY) + + configure_file("${_gitdescmoddir}/GetGitRevisionDescription.cmake.in" + "${GIT_DATA}/grabRef.cmake" + @ONLY) + include("${GIT_DATA}/grabRef.cmake") + + set(${_refspecvar} "${HEAD_REF}" PARENT_SCOPE) + set(${_hashvar} "${HEAD_HASH}" PARENT_SCOPE) +endfunction() + +function(git_rev_parse _var) + if(NOT GIT_FOUND) + find_package(Git QUIET) + endif() + if(NOT GIT_FOUND) + set(${_var} "n/a" PARENT_SCOPE) + return() + endif() + get_git_head_revision(refspec hash) + if(NOT hash) + set(${_var} "n/a" PARENT_SCOPE) + return() + endif() + + execute_process(COMMAND "${GIT_EXECUTABLE}" rev-parse ${ARGN} ${hash} + WORKING_DIRECTORY "${CMAKE_SOURCE_DIR}" + RESULT_VARIABLE res + OUTPUT_VARIABLE out + ERROR_QUIET + OUTPUT_STRIP_TRAILING_WHITESPACE) + if(NOT res EQUAL 0) + set(out "n/a") + endif() + + set(${_var} "${out}" PARENT_SCOPE) +endfunction() + + +function(git_describe _var) + if(NOT GIT_FOUND) + find_package(Git QUIET) + endif() + if(NOT GIT_FOUND) + set(${_var} "n/a" PARENT_SCOPE) + return() + endif() + get_git_head_revision(refspec hash) + if(NOT hash) + set(${_var} "n/a" PARENT_SCOPE) + return() + endif() + + execute_process(COMMAND "${GIT_EXECUTABLE}" describe ${hash} ${ARGN} + WORKING_DIRECTORY "${CMAKE_SOURCE_DIR}" + RESULT_VARIABLE res + OUTPUT_VARIABLE out + ERROR_QUIET + OUTPUT_STRIP_TRAILING_WHITESPACE) + if(NOT res EQUAL 0) + set(out "n/a") + endif() + + set(${_var} "${out}" PARENT_SCOPE) +endfunction() + +function(git_get_exact_tag _var) + git_describe(out --exact-match ${ARGN}) + set(${_var} "${out}" PARENT_SCOPE) +endfunction() |