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cmake: Make the git version detection more robust

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This commit is contained in:
Ryan Pavlik 2021-04-09 18:11:28 -05:00
parent 88f1e51d76
commit 111d353662
1 changed files with 8 additions and 3 deletions
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11
cmake/GetGitRevisionDescription.cmake
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@ -3,7 +3,7 @@
# 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> ...])
# get_git_head_revision(<refspecvar> <hashvar> [ALLOW_LOOKING_ABOVE_CMAKE_SOURCE_DIR])
#
# Returns the refspec and sha hash of the current head revision
#
@ -68,7 +68,7 @@ function(_git_find_closest_git_dir _start_dir _git_dir_var)
while(NOT EXISTS "${git_dir}")
# .git dir not found, search parent directories
set(git_previous_parent "${cur_dir}")
get_filename_component(cur_dir ${cur_dir} DIRECTORY)
get_filename_component(cur_dir "${cur_dir}" DIRECTORY)
if(cur_dir STREQUAL git_previous_parent)
# We have reached the root directory, we are not in git
set(${_git_dir_var}
@ -86,10 +86,15 @@ endfunction()
function(get_git_head_revision _refspecvar _hashvar)
_git_find_closest_git_dir("${CMAKE_CURRENT_SOURCE_DIR}" GIT_DIR)
if("${ARGN}" STREQUAL "ALLOW_LOOKING_ABOVE_CMAKE_SOURCE_DIR")
set(ALLOW_LOOKING_ABOVE_CMAKE_SOURCE_DIR TRUE)
else()
set(ALLOW_LOOKING_ABOVE_CMAKE_SOURCE_DIR FALSE)
endif()
if(NOT "${GIT_DIR}" STREQUAL "")
file(RELATIVE_PATH _relative_to_source_dir "${CMAKE_SOURCE_DIR}"
"${GIT_DIR}")
if("${_relative_to_source_dir}" MATCHES "[.][.]")
if("${_relative_to_source_dir}" MATCHES "[.][.]" AND NOT ALLOW_LOOKING_ABOVE_CMAKE_SOURCE_DIR)
# We've gone above the CMake root dir.
set(GIT_DIR "")
endif()