@echo off

if [%1] == [] goto help

REM This allows us to expand variables at execution
setlocal ENABLEDELAYEDEXPANSION

REM This will set PYFILES as a list of tracked .py files
set PYFILES=
for /F "tokens=* USEBACKQ" %%A in (`git ls-files "*.py"`) do (
    set PYFILES=!PYFILES! %%A
)

goto %1

:reformat
black -l 99 !PYFILES!
exit /B %ERRORLEVEL%

:stylecheck
black -l 99 --check !PYFILES!
exit /B %ERRORLEVEL%

:help
echo Usage:
echo   make ^<command^>
echo.
echo Commands:
echo   reformat                   Reformat all .py files being tracked by git.
echo   stylecheck                 Check which tracked .py files need reformatting.