[brief] Changes the way the versioning is done.

[detailed]
- Use the built-in CMake PROJECT_VERSION variables instead of keeping
  separate ones. That way we only have to update one thing instead of
  updating several.

Author: marovira

CMakeLists.txt

@@ -10,15 +10,6 @@ endif()
 
 set_property(GLOBAL PROPERTY USE_FOLDERS ON)
 
-# Define version variables.
-set(ZEUS_VERSION_MAJOR "1")
-set(ZEUS_VERSION_MINOR "0")
-set(ZEUS_VERSION_PATCH "1")
-set(ZEUS_VERSION_EXTRA "")
-set(ZEUS_VERSION "${ZEUS_VERSION_MAJOR}.${ZEUS_VERSION_MINOR}")
-set(ZEUS_VERSION_FULL
-    "${ZEUS_VERSION}.${ZEUS_VERSION_PATCH}${ZEUS_VERSION_EXTRA}")
-
 #================================
 # Option variables.
 #================================

include/zeus/zeus.hpp.in

@@ -2,15 +2,15 @@
 
 #include <string_view>
 
-#define ZEUS_VERSION_MAJOR @ZEUS_VERSION_MAJOR@
-#define ZEUS_VERSION_MINOR @ZEUS_VERSION_MINOR@
-#define ZEUS_VERSION_PATCH @ZEUS_VERSION_PATCH@
+#define ZEUS_VERSION_MAJOR @PROJECT_VERSION_MAJOR@
+#define ZEUS_VERSION_MINOR @PROJECT_VERSION_MINOR@
+#define ZEUS_VERSION_PATCH @PROJECT_VERSION_PATCH@
 
 namespace zeus
 {
-    static constexpr auto zeus_version_major{@ZEUS_VERSION_MAJOR@};
-    static constexpr auto zeus_version_minor{@ZEUS_VERSION_MINOR@};
-    static constexpr auto zeus_version_patch{@ZEUS_VERSION_PATCH@};
+    static constexpr auto zeus_version_major{@PROJECT_VERSION_MAJOR@};
+    static constexpr auto zeus_version_minor{@PROJECT_VERSION_MINOR@};
+    static constexpr auto zeus_version_patch{@PROJECT_VERSION_PATCH@};
 
-    static constexpr std::string_view zeus_version_string{"@ZEUS_VERSION_MAJOR@.@ZEUS_VERSION_MINOR@.@ZEUS_VERSION_PATCH@"};
+    static constexpr std::string_view zeus_version_string{"@PROJECT_VERSION_MAJOR@.@PROJECT_VERSION_MINOR@.@PROJECT_VERSION_PATCH@"};
 }