Get application version from git

CMakeLists.txt

@@ -18,6 +18,7 @@ if(NOT CMAKE_BUILD_TYPE)
 endif()
 
 project(Alber)
+set(PANDA3DS_VERSION "0.8")
 set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR})
 
 if(APPLE)
@@ -60,6 +61,30 @@ if(CMAKE_CXX_COMPILER_ID STREQUAL "MSVC" AND ENABLE_USER_BUILD)
     set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /GS-")
 endif() 
 
+find_package(Git)
+if(GIT_FOUND)
+    execute_process(
+        WORKING_DIRECTORY ${PROJECT_SOURCE_DIR} COMMAND ${GIT_EXECUTABLE} describe --tags --abbrev=0
+        OUTPUT_VARIABLE PANDA3DS_VERSION OUTPUT_STRIP_TRAILING_WHITESPACE
+    )
+    execute_process(
+        WORKING_DIRECTORY ${PROJECT_SOURCE_DIR} COMMAND ${GIT_EXECUTABLE} describe --tags
+        OUTPUT_VARIABLE git_version_tag OUTPUT_STRIP_TRAILING_WHITESPACE
+    )
+    if(NOT PANDA3DS_VERSION STREQUAL git_version_tag)
+      execute_process(
+          WORKING_DIRECTORY ${PROJECT_SOURCE_DIR} COMMAND ${GIT_EXECUTABLE} describe --always --abbrev=7
+          OUTPUT_VARIABLE git_version_rev OUTPUT_STRIP_TRAILING_WHITESPACE
+      )
+      set(PANDA3DS_VERSION "${PANDA3DS_VERSION}.${git_version_rev}")
+      unset(git_version_rev)
+    endif()
+    string(REGEX REPLACE "^v" "" PANDA3DS_VERSION "${PANDA3DS_VERSION}")
+    unset(git_version_tag)
+endif()
+configure_file(${PROJECT_SOURCE_DIR}/include/version.hpp.in ${CMAKE_BINARY_DIR}/include/version.hpp)
+include_directories(${CMAKE_BINARY_DIR}/include/)
+
 add_library(AlberCore STATIC)
 
 include_directories(${PROJECT_SOURCE_DIR}/include/)