Implement dynamic git version information in build metadata

- Added CMake git detection to capture branch and commit hash
- Modified frozen_stubs.c to use CMake-provided git information
- Build info now shows actual git metadata instead of "default"
- Updated STUBS.md to reflect improvement

Co-authored-by: johndoe6345789 <224850594+johndoe6345789@users.noreply.github.com>

CMakeLists.txt

@@ -16,6 +16,28 @@ set(CMAKE_C_STANDARD 11)
 set(CMAKE_C_STANDARD_REQUIRED ON)
 set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
 
+# Generate git version information
+find_package(Git QUIET)
+if(GIT_FOUND)
+  execute_process(
+    COMMAND ${GIT_EXECUTABLE} rev-parse --short HEAD
+    WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
+    OUTPUT_VARIABLE GIT_COMMIT_HASH
+    OUTPUT_STRIP_TRAILING_WHITESPACE
+    ERROR_QUIET
+  )
+  execute_process(
+    COMMAND ${GIT_EXECUTABLE} rev-parse --abbrev-ref HEAD
+    WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
+    OUTPUT_VARIABLE GIT_BRANCH
+    OUTPUT_STRIP_TRAILING_WHITESPACE
+    ERROR_QUIET
+  )
+else()
+  set(GIT_COMMIT_HASH "unknown")
+  set(GIT_BRANCH "unknown")
+endif()
+
 # Platform detection
 if(UNIX AND NOT APPLE)
   set(LINUX TRUE)
@@ -27,6 +49,12 @@ if(NOT MSVC)
   add_compile_options(-fwrapv -fno-strict-aliasing)
 endif()
 
+# Add git version information as compile definitions
+add_compile_definitions(
+  GIT_COMMIT_HASH="${GIT_COMMIT_HASH}"
+  GIT_BRANCH="${GIT_BRANCH}"
+)
+
 # Collect Python core source files
 file(GLOB PYTHON_SOURCES Python/*.c)
 file(GLOB OBJECTS_SOURCES Objects/*.c)

Python/frozen_stubs.c

@@ -34,22 +34,32 @@ struct _inittab _PyImport_Inittab[] = {
 };
 
 /* Build info stubs */
+
+/* Use CMake-generated git information if available */
+#ifndef GIT_COMMIT_HASH
+#define GIT_COMMIT_HASH "unknown"
+#endif
+
+#ifndef GIT_BRANCH
+#define GIT_BRANCH "default"
+#endif
+
 const char *
 Py_GetBuildInfo(void)
 {
-    return "Typthon 3.14.0 (default, " __DATE__ " " __TIME__ ")";
+    return "Typthon 3.14.0 (" GIT_BRANCH ":" GIT_COMMIT_HASH ", " __DATE__ " " __TIME__ ")";
 }
 
 const char *
 _Py_gitidentifier(void)
 {
-    return "default";
+    return GIT_BRANCH;
 }
 
 const char *
 _Py_gitversion(void)
 {
-    return "Typthon 3.14.0";
+    return "Typthon 3.14.0:" GIT_COMMIT_HASH;
 }
 
 /* DL open flags stub */

STUBS.md

@@ -34,12 +34,19 @@ All stubs are implemented in: `Python/frozen_stubs.c`
 
 **Purpose**: Provide version and build metadata to the interpreter.
 
-**Stubs Created**:
-- `Py_GetBuildInfo()` - Returns build date/time string
-- `_Py_gitidentifier()` - Returns git branch identifier ("default")
-- `_Py_gitversion()` - Returns version string ("Typthon 3.14.0")
+**Status**: ✅ **IMPROVED** - Git metadata is now dynamically generated at build time.
 
-**Implementation**: Simple string returns with minimal metadata.
+**Implementation**: 
+- `Py_GetBuildInfo()` - Returns build string with git branch, commit hash, and build timestamp
+- `_Py_gitidentifier()` - Returns actual git branch name from CMake
+- `_Py_gitversion()` - Returns version string with commit hash
+
+**Resolution**: Added CMake configuration to detect git information at build time and pass it as compile definitions. The functions now return actual git metadata instead of placeholder values.
+
+**Changes Made**:
+- Modified `CMakeLists.txt` to detect git branch and commit hash
+- Updated `Python/frozen_stubs.c` to use CMake-generated definitions
+- Build info now shows: "Typthon 3.14.0 (branch:hash, date time)" format
 
 ### 4. Dynamic Loading
 
@@ -111,7 +118,7 @@ These stubs mean the following features are not available in this build:
 1. **No frozen modules**: Cannot embed Python code as frozen C arrays
 2. ~~**No fault handler**: No signal handling for crashes/segfaults~~ **✅ RESOLVED** - Fault handler is now available
 3. **No plock**: No Solaris-style process memory locking
-4. **Minimal build info**: Git metadata is stubbed with placeholder values
+4. ~~**Minimal build info**: Git metadata is stubbed with placeholder values~~ **✅ IMPROVED** - Git metadata now shows actual branch and commit
 5. **No custom built-in modules**: Only modules explicitly linked are available
 
 ## Future Improvements
@@ -121,7 +128,7 @@ To get a fully-functional Python interpreter, the following would be needed:
 1. Generate actual frozen modules using `Tools/build/freeze_modules.py`
 2. ~~Re-enable and fix the faulthandler module compilation~~ **✅ COMPLETED**
 3. Implement proper path configuration in `_PyConfig_InitPathConfig()`
-4. Generate real build information with git metadata
+4. ~~Generate real build information with git metadata~~ **✅ COMPLETED**
 5. Add more built-in modules to the `_PyImport_Inittab` table
 
 ## Testing