Clean up generate.bat

generate.bat

@@ -2,10 +2,11 @@
 
 git submodule update --init --recursive
 
-:LUA_GENERATE
- where gcc || goto NO_GCC
- where luajit || goto NO_LUAJIT
+where gcc || goto NO_GCC
+where luajit || goto NO_LUAJIT
+where python || goto NO_PYTHON
 
+:LUA_GENERATE
  pushd "%~dp0\cimgui\generator"
  del ..\..\cimgui.cpp
  del ..\..\cimgui.h
@@ -14,37 +15,26 @@ git submodule update --init --recursive
  copy ..\cimgui.h ..\..\zig-imgui\cimgui.h
  popd
 
- goto PYTHON_GENERATE
-
-:NO_LUAJIT
- echo Couldn't find LuaJIT, make sure it is installed and on your path.
- exit /b 1
-
-:NO_GCC
- echo Couldn't find gcc, make sure it is installed and on your path.
- exit /b 1
-
-:NO_BUILD
- :: build_lib.bat prints the specific error that prevented the build
- echo Skipping library build.
- goto PYTHON_GENERATE
-
 :PYTHON_GENERATE
- where python || goto NO_PYTHON
  python "%~dp0\generate.py"
- goto CLEANUP
 
 :CLEANUP
  pushd "%~dp0\cimgui"
  git restore .
  del generator\preprocesed.h
  popd
- goto DONE
-
-:NO_PYTHON
- echo Couldn't find python, make sure it is installed and on your path.
- goto DONE
 
 :DONE
  exit /b 0
 
+:NO_LUAJIT
+ echo Couldn't find LuaJIT, make sure it is installed and on your path.
+ exit /b 1
+
+:NO_GCC
+ echo Couldn't find gcc, make sure it is installed and on your path.
+ exit /b 1
+
+:NO_PYTHON
+ echo Couldn't find python, make sure it is installed and on your path.
+ exit /b 1