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CMake: add a flag to enable version lookup outside the root folder (#533)

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Add ARGN to determine_version_with_git() parameters list to allow
specifying the optional ALLOW_LOOKING_ABOVE_CMAKE_SOURCE_DIR flag
This commit is contained in:
valentink-eroad 2022-04-14 20:15:40 +12:00 committed by GitHub
parent 3d4709152d
commit 733b50e9ae
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4 changed files with 10 additions and 3 deletions
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2
CMakeLists.txt
View File

@ -5,7 +5,7 @@ cmake_minimum_required(VERSION 3.5.0)
include(${CMAKE_CURRENT_SOURCE_DIR}/cmake/helpers.cmake)
determine_version_with_git()
determine_version_with_git(${GIT_DIR_LOOKUP_POLICY})
project(etl VERSION ${ETL_VERSION})

7
README.md
View File

@ -77,6 +77,13 @@ add_executable(foo main.cpp)
target_link_libraries(foo PRIVATE etl)
```
If ETL library is used as a Git submodule it may require additional configuration for proper ETL version resolution by allowing the lookup for Git folder outside of the library root directory.
```cmake
set(GIT_DIR_LOOKUP_POLICY ALLOW_LOOKING_ABOVE_CMAKE_SOURCE_DIR)
add_subdirectory(etl)
```
If you want to install this library with CMake, you can perform the following steps. On Linux,
super user rights might be required to install the library, so it might be necessary to add
`sudo` before the last command:

2
cmake/GetGitRevisionDescription.cmake
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@ -176,7 +176,7 @@ function(git_describe _var)
if(NOT GIT_FOUND)
find_package(Git QUIET)
endif()
get_git_head_revision(refspec hash)
get_git_head_revision(refspec hash ${ARGN})
if(NOT GIT_FOUND)
set(${_var}
"GIT-NOTFOUND"

2
cmake/helpers.cmake
View File

@ -10,7 +10,7 @@ endfunction()
function(determine_version_with_git)
include(${CMAKE_CURRENT_SOURCE_DIR}/cmake/GetGitRevisionDescription.cmake)
git_describe(VERSION)
git_describe(VERSION ${ARGN})
string(FIND ${VERSION} "." VALID_VERSION)
if(VALID_VERSION EQUAL -1)
message(WARNING "Version string ${VERSION} retrieved with git describe is invalid")