Reading version from git

CMakeLists.txt

@@ -2,6 +2,28 @@
 cmake_minimum_required(VERSION 3.8.0)
 project(vimix VERSION 0.0.1 LANGUAGES CXX C)
 
+# use git
+find_package (Git)
+if(GIT_EXECUTABLE)
+  execute_process(
+    COMMAND ${GIT_EXECUTABLE} describe --tags
+    WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
+    OUTPUT_VARIABLE GIT_DESCRIBE_VERSION
+    RESULT_VARIABLE GIT_DESCRIBE_ERROR_CODE
+    OUTPUT_STRIP_TRAILING_WHITESPACE
+    )
+  if(NOT GIT_DESCRIBE_ERROR_CODE)
+      string(SUBSTRING ${GIT_DESCRIBE_VERSION} 0 1 VIMIX_VERSION_MAJOR)
+      string(SUBSTRING ${GIT_DESCRIBE_VERSION} 2 1 VIMIX_VERSION_MINOR)
+      string(SUBSTRING ${GIT_DESCRIBE_VERSION} 4 1 VIMIX_VERSION_PATCH)
+      add_definitions(-DVIMIX_VERSION_MAJOR=${VIMIX_VERSION_MAJOR})
+      add_definitions(-DVIMIX_VERSION_MINOR=${VIMIX_VERSION_MINOR})
+      add_definitions(-DVIMIX_VERSION_PATCH=${VIMIX_VERSION_PATCH})
+  endif()
+endif()
+
+message(STATUS "Compiling vimix version ${VIMIX_VERSION_MAJOR}.${VIMIX_VERSION_MINOR}.${VIMIX_VERSION_PATCH}")
+
 set(CMAKE_VERBOSE_MAKEFILE ON CACHE BOOL "ON")
 set(CMAKE_INCLUDE_CURRENTDIR ON)
 set(CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/cmake/modules )
@@ -34,6 +56,7 @@ endif()
 # Include the CMake RC module
 include(CMakeRC)
 
+
 #
 # GSTREAMER
 #
@@ -483,8 +506,9 @@ SET(CPACK_PACKAGE_DESCRIPTION_SUMMARY "vimix\n Real-time video mixing for live p
 SET(CPACK_PACKAGE_DESCRIPTION_FILE "${CMAKE_SOURCE_DIR}/README.md")
 SET(CPACK_PACKAGE_CONTACT "bruno.herbelin@gmail.com")
 SET(CPACK_RESOURCE_FILE_LICENSE "${CMAKE_SOURCE_DIR}/COPYING.txt")
-SET(CPACK_PACKAGE_VERSION_MAJOR "0")
+SET(CPACK_PACKAGE_VERSION_MAJOR "${VIMIX_VERSION_MAJOR}")
-SET(CPACK_PACKAGE_VERSION_MINOR "5")
+SET(CPACK_PACKAGE_VERSION_MINOR "${VIMIX_VERSION_MINOR}")
+SET(CPACK_PACKAGE_VERSION_PATCH "${VIMIX_VERSION_PATCH}")
 SET(CPACK_PACKAGE_VENDOR "Bruno Herbelin")
 SET(CPACK_SOURCE_IGNORE_FILES
     "/\\\\.git/"

Settings.cpp

@@ -22,9 +22,11 @@ void Settings::Save()
     xmlDoc.InsertFirstChild(pDec);
 
     XMLElement *pRoot = xmlDoc.NewElement(application.name.c_str());
-    pRoot->SetAttribute("major", APP_VERSION_MAJOR);
+#ifdef VIMIX_VERSION_MAJOR
-    pRoot->SetAttribute("minor", APP_VERSION_MINOR);
+    pRoot->SetAttribute("major", VIMIX_VERSION_MAJOR);
+    pRoot->SetAttribute("minor", VIMIX_VERSION_MINOR);
     xmlDoc.InsertEndChild(pRoot);
+#endif
 
     string comment = "Settings for " + application.name;
     XMLComment *pComment = xmlDoc.NewComment(comment.c_str());
@@ -233,12 +235,14 @@ void Settings::Load()
     if (application.name.compare( string( pRoot->Value() ) ) != 0 )
         return;
 
+#ifdef VIMIX_VERSION_MAJOR
     // cancel on different version
     int version_major = -1, version_minor = -1;
     pRoot->QueryIntAttribute("major", &version_major);
     pRoot->QueryIntAttribute("minor", &version_minor);
-    if (version_major != APP_VERSION_MAJOR || version_minor != APP_VERSION_MINOR)
+    if (version_major != VIMIX_VERSION_MAJOR || version_minor != VIMIX_VERSION_MINOR)
         return;
+#endif
 
     XMLElement * applicationNode = pRoot->FirstChildElement("Application");
     if (applicationNode != nullptr) {

UserInterfaceManager.cpp

@@ -3042,9 +3042,16 @@ void UserInterface::RenderAbout(bool* p_open)
         return;
     }
 
+#ifdef VIMIX_VERSION_MAJOR
     ImGuiToolkit::PushFont(ImGuiToolkit::FONT_BOLD);
-    ImGui::Text("%s %d.%d", APP_NAME, APP_VERSION_MAJOR, APP_VERSION_MINOR);
+    ImGui::Text("%s %d.%d.%d", APP_NAME, VIMIX_VERSION_MAJOR, VIMIX_VERSION_MINOR, VIMIX_VERSION_PATCH);
     ImGui::PopFont();
+#else
+    ImGuiToolkit::PushFont(ImGuiToolkit::FONT_BOLD);
+    ImGui::Text("%s", APP_NAME);
+    ImGui::PopFont();
+#endif
+
     ImGui::Separator();
     ImGui::Text("vimix performs graphical mixing and blending of\nseveral movie clips and computer generated graphics,\nwith image processing effects in real-time.");
     ImGui::Text("\nvimix is licensed under the GNU GPL version 3.\nCopyright 2019-2020 Bruno Herbelin.");

defines.h

@@ -4,8 +4,6 @@
 #define APP_NAME "vimix"
 #define APP_TITLE " -- Video Live Mixer"
 #define APP_SETTINGS "vimix.xml"
-#define APP_VERSION_MAJOR 0
-#define APP_VERSION_MINOR 5
 #define XML_VERSION_MAJOR 0
 #define XML_VERSION_MINOR 2
 #define MAX_RECENT_HISTORY 20