@echo off
setlocal

set UV4=C:\Keil_v5\UV4\UV4.exe
set PROJ=%~dp0STM32F407-Demo.uvprojx
set LOG=%~dp0build_log.txt
set TARGET=STM32F407-Demo

"%UV4%" -b "%PROJ%" -t%TARGET% -j0 -o "%LOG%"

findstr /C:"0 Error(s), 0 Warning(s)" "%LOG%" >nul
if %ERRORLEVEL% equ 0 (
    echo BUILD_OK: 0 errors, 0 warnings
    exit /b 0
)

echo BUILD_FAIL: no success marker in log
type "%LOG%"
exit /b 1