CMakeLists.txt

cmake_minimum_required(VERSION 2.8)

project("version_from_git")

# Appends the cmake/modules path to MAKE_MODULE_PATH variable.
set(CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/cmake/modules ${CMAKE_MODULE_PATH})

#
# Make a version file containing the current version from git.
#
include(GetGitRevisionDescription)
git_describe(VERSION --tags --dirty=-dirty)

#parse the version information into pieces.
string(REGEX REPLACE "^v([0-9]+)\\..*" "\\1" VERSION_MAJOR "${VERSION}")
string(REGEX REPLACE "^v[0-9]+\\.([0-9]+).*" "\\1" VERSION_MINOR "${VERSION}")
string(REGEX REPLACE "^v[0-9]+\\.[0-9]+\\.([0-9]+).*" "\\1" VERSION_PATCH "${VERSION}")
string(REGEX REPLACE "^v[0-9]+\\.[0-9]+\\.[0-9]+(.*)" "\\1" VERSION_SHA1 "${VERSION}")
set(VERSION_SHORT "${VERSION_MAJOR}.${VERSION_MINOR}.${VERSION_PATCH}")

configure_file(${CMAKE_CURRENT_SOURCE_DIR}/cmake/modules/version.cpp.in
                ${CMAKE_CURRENT_BINARY_DIR}/version.cpp)
set(version_file "${CMAKE_CURRENT_BINARY_DIR}/version.cpp")

set(source_files "${CMAKE_CURRENT_SOURCE_DIR}/src/main.cpp")

#Add the version_file to the project build.
add_executable(${PROJECT_NAME} ${source_files} ${version_file})