feat(version): add build field to vim.version()

This exposes the full git hash of the build to the lua table, generated by CMake.

Closes #23863

cmake/GenerateVersion.cmake

@@ -8,6 +8,17 @@ execute_process(
   ERROR_QUIET
   RESULT_VARIABLE RES)
 
+execute_process(
+  COMMAND git --git-dir=${NVIM_SOURCE_DIR}/.git --work-tree=${NVIM_SOURCE_DIR} rev-parse HEAD
+  OUTPUT_VARIABLE GIT_HASH
+  OUTPUT_STRIP_TRAILING_WHITESPACE
+  ERROR_QUIET
+  RESULT_VARIABLE RES)
+
+set(NVIM_VERSION_BUILD "#define NVIM_VERSION_BUILD \"${GIT_HASH}\"\n")
+file(WRITE "${OUTPUT}" "${NVIM_VERSION_BUILD}")
+
+
 if(RES)
   message(STATUS "Using NVIM_VERSION: ${NVIM_VERSION}")
   file(WRITE "${OUTPUT}" "")
@@ -33,7 +44,7 @@ endif()
 
 if(NOT "${NVIM_VERSION_HASH}" STREQUAL "${CURRENT_VERSION_HASH}")
   message(STATUS "Using NVIM_VERSION: ${NVIM_VERSION}")
-  file(WRITE "${OUTPUT}" "${NVIM_VERSION_STRING}")
+  file(APPEND "${OUTPUT}" "${NVIM_VERSION_STRING}")
   if(WIN32)
     configure_file("${OUTPUT}" "${OUTPUT}" NEWLINE_STYLE UNIX)
   endif()

src/nvim/version.c

@@ -2560,6 +2560,7 @@ Dictionary version_dict(void)
   PUT(d, "major", INTEGER_OBJ(NVIM_VERSION_MAJOR));
   PUT(d, "minor", INTEGER_OBJ(NVIM_VERSION_MINOR));
   PUT(d, "patch", INTEGER_OBJ(NVIM_VERSION_PATCH));
+  PUT(d, "build", CSTR_AS_OBJ(NVIM_VERSION_BUILD));
   PUT(d, "prerelease", BOOLEAN_OBJ(NVIM_VERSION_PRERELEASE[0] != '\0'));
   PUT(d, "api_level", INTEGER_OBJ(NVIM_API_LEVEL));
   PUT(d, "api_compatible", INTEGER_OBJ(NVIM_API_LEVEL_COMPAT));