build: versioning

versioning via git tags, commits after tags are displayed in the versionnumber

cmake/version.cmake

@@ -0,0 +1,47 @@
+# simple check for a git repo
+if(EXISTS "${CMAKE_SOURCE_DIR}/.git")
+
+    execute_process(
+        COMMAND git rev-parse --abbrev-ref HEAD
+        WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
+        OUTPUT_VARIABLE GIT_BRANCH
+        OUTPUT_STRIP_TRAILING_WHITESPACE
+    )
+
+    execute_process(
+        COMMAND git log -1 --format=%h
+        WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
+        OUTPUT_VARIABLE GIT_COMMIT_HASH
+        OUTPUT_STRIP_TRAILING_WHITESPACE
+    )
+
+    execute_process(
+        COMMAND git log -1 --format=%ci
+        WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
+        OUTPUT_VARIABLE GIT_COMMIT_TIME
+        OUTPUT_STRIP_TRAILING_WHITESPACE
+    )
+
+    execute_process(
+        COMMAND git describe --match "[0-9]*" --abbrev=7 HEAD
+        WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
+        OUTPUT_VARIABLE GIT_VERSION_NUMBER
+        OUTPUT_STRIP_TRAILING_WHITESPACE
+    )
+else(EXISTS "${CMAKE_SOURCE_DIR}/.git")
+    set(GIT_BRANCH "")
+    set(GIT_COMMIT_HASH "")
+    set(GIT_VERSION_NUMBER "")
+    set(BUILD_TYPE "")
+
+endif(EXISTS "${CMAKE_SOURCE_DIR}/.git")
+
+message(STATUS "Git current branch: ${GIT_BRANCH}")
+message(STATUS "Git commit hash: ${GIT_COMMIT_HASH}")
+message(STATUS "Git commit time: ${GIT_COMMIT_TIME}")
+message(STATUS "Git version number:" ${GIT_VERSION_NUMBER} )
+
+configure_file(
+  ${CMAKE_SOURCE_DIR}/src/app/version.h.in
+  ${CMAKE_SOURCE_DIR}/build/src/app/version.h
+)

cmake/version_setup.cmake

@@ -0,0 +1,7 @@
+# # build type needs to be in added as definition because of visual studio
+message(STATUS "setting up the buildtype for versioning")
+if(MSVC)
+    add_definitions(-DBUILD_TYPE="${ConfigurationName}")
+else(MSVC)
+     add_definitions(-DBUILD_TYPE="${CMAKE_BUILD_TYPE}")
+endif(MSVC)