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Recompile git version info only when it changes.
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# - 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 <[email protected]> <[email protected]> | ||
# 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) | ||
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if(__get_git_revision_description) | ||
return() | ||
endif() | ||
set(__get_git_revision_description YES) | ||
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# 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 ${CMAKE_CURRENT_LIST_FILE} PATH) | ||
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function(get_git_head_revision _refspecvar _hashvar) | ||
set(GIT_PARENT_DIR "${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 "${GIT_DATA}") | ||
endif() | ||
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if(NOT EXISTS "${GIT_DIR}/HEAD") | ||
return() | ||
endif() | ||
set(HEAD_FILE "${GIT_DATA}/HEAD") | ||
configure_file("${GIT_DIR}/HEAD" "${HEAD_FILE}" COPYONLY) | ||
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configure_file("${_gitdescmoddir}/GetGitRevisionDescription.cmake.in" | ||
"${GIT_DATA}/grabRef.cmake" | ||
@ONLY) | ||
include("${GIT_DATA}/grabRef.cmake") | ||
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set(${_refspecvar} "${HEAD_REF}" PARENT_SCOPE) | ||
set(${_hashvar} "${HEAD_HASH}" PARENT_SCOPE) | ||
endfunction() | ||
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function(git_describe _var) | ||
if(NOT GIT_FOUND) | ||
find_package(Git QUIET) | ||
endif() | ||
get_git_head_revision(refspec hash) | ||
if(NOT GIT_FOUND) | ||
set(${_var} "GIT-NOTFOUND" PARENT_SCOPE) | ||
return() | ||
endif() | ||
if(NOT hash) | ||
set(${_var} "HEAD-HASH-NOTFOUND" PARENT_SCOPE) | ||
return() | ||
endif() | ||
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# TODO sanitize | ||
#if((${ARGN}" MATCHES "&&") OR | ||
# (ARGN MATCHES "||") OR | ||
# (ARGN MATCHES "\\;")) | ||
# message("Please report the following error to the project!") | ||
# message(FATAL_ERROR "Looks like someone's doing something nefarious with git_describe! Passed arguments ${ARGN}") | ||
#endif() | ||
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#message(STATUS "Arguments to execute_process: ${ARGN}") | ||
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execute_process(COMMAND | ||
"${GIT_EXECUTABLE}" | ||
describe | ||
${hash} | ||
${ARGN} | ||
WORKING_DIRECTORY | ||
"${CMAKE_CURRENT_SOURCE_DIR}" | ||
RESULT_VARIABLE | ||
res | ||
OUTPUT_VARIABLE | ||
out | ||
ERROR_QUIET | ||
OUTPUT_STRIP_TRAILING_WHITESPACE) | ||
if(NOT res EQUAL 0) | ||
set(out "${out}-${res}-NOTFOUND") | ||
endif() | ||
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set(${_var} "${out}" PARENT_SCOPE) | ||
endfunction() | ||
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function(git_get_exact_tag _var) | ||
git_describe(out --exact-match ${ARGN}) | ||
set(${_var} "${out}" PARENT_SCOPE) | ||
endfunction() |
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# | ||
# Internal file for GetGitRevisionDescription.cmake | ||
# | ||
# Requires CMake 2.6 or newer (uses the 'function' command) | ||
# | ||
# Original Author: | ||
# 2009-2010 Ryan Pavlik <[email protected]> <[email protected]> | ||
# http://academic.cleardefinition.com | ||
# Iowa State University HCI Graduate Program/VRAC | ||
# | ||
# Copyright Iowa State University 2009-2010. | ||
# Distributed under the Boost Software License, Version 1.0. | ||
# (See accompanying file LICENSE_1_0.txt or copy at | ||
# http://www.boost.org/LICENSE_1_0.txt) | ||
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set(HEAD_HASH) | ||
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file(READ "@HEAD_FILE@" HEAD_CONTENTS LIMIT 1024) | ||
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string(STRIP "${HEAD_CONTENTS}" HEAD_CONTENTS) | ||
if(HEAD_CONTENTS MATCHES "ref") | ||
# named branch | ||
string(REPLACE "ref: " "" HEAD_REF "${HEAD_CONTENTS}") | ||
if(EXISTS "@GIT_DIR@/${HEAD_REF}") | ||
configure_file("@GIT_DIR@/${HEAD_REF}" "@GIT_DATA@/head-ref" COPYONLY) | ||
else() | ||
configure_file("@GIT_DIR@/packed-refs" "@GIT_DATA@/packed-refs" COPYONLY) | ||
file(READ "@GIT_DATA@/packed-refs" PACKED_REFS) | ||
if(${PACKED_REFS} MATCHES "([0-9a-z]*) ${HEAD_REF}") | ||
set(HEAD_HASH "${CMAKE_MATCH_1}") | ||
endif() | ||
endif() | ||
else() | ||
# detached HEAD | ||
configure_file("@GIT_DIR@/HEAD" "@GIT_DATA@/head-ref" COPYONLY) | ||
endif() | ||
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if(NOT HEAD_HASH) | ||
file(READ "@GIT_DATA@/head-ref" HEAD_HASH LIMIT 1024) | ||
string(STRIP "${HEAD_HASH}" HEAD_HASH) | ||
endif() |
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