set mypath=%~dp0
cd %mypath:~0,-1%

set PYTHONHOME=
set PYTHONPATH=

if not exist %PYTHON_DIST% mkdir %PYTHON_DIST%
if not exist %PYTHON_BUILD% mkdir %PYTHON_BUILD%
if not exist %1 mkdir %1
if not exist %PYTHON_DIST%\Python-%PYTHON_VERSION%.tgz (
  curl https://www.python.org/ftp/python/%PYTHON_VERSION%/Python-%PYTHON_VERSION%.tgz --output %PYTHON_DIST%\Python-%PYTHON_VERSION%.tgz
)

if not exist "%1\python3*.lib" (
  echo building in %1
  rd /q /s %PYTHON_BUILD%\Python-%PYTHON_VERSION%

  tar -C %PYTHON_BUILD% -zxf %PYTHON_DIST%\Python-%PYTHON_VERSION%.tgz
  %PYTHON_BUILD%\Python-%PYTHON_VERSION%\PCBuild\build.bat
  if not exist %1\DLLs mkdir %1\DLLs
  (robocopy %PYTHON_BUILD%\Python-%PYTHON_VERSION%\PCBuild\amd64 %1\DLLs /MIR) ^& if %ERRORLEVEL% leq 1 set ERRORLEVEL = 0
  (robocopy %PYTHON_BUILD%\Python-%PYTHON_VERSION%\Lib %1\lib /MIR) ^& if %ERRORLEVEL% leq 1 set ERRORLEVEL = 0
  (robocopy %PYTHON_BUILD%\Python-%PYTHON_VERSION%\Include %1\include /MIR) ^& if %ERRORLEVEL% leq 1 set ERRORLEVEL = 0
  copy %PYTHON_BUILD%\Python-%PYTHON_VERSION%\PC\pyconfig.h %1\include
  move "%1\DLLs\python.exe" %1
  move "%1\DLLs\python3*.*" %1
  set PYTHONHOME=%~1
  %1\python -m ensurepip
)