@echo off

if not defined PYTHON (set PYTHON=python)
if not defined GIT (set GIT=git)
if not defined COMMANDLINE_ARGS (set COMMANDLINE_ARGS=%*)
if not defined VENV_DIR (set VENV_DIR=venv)
if not defined TORCH_COMMAND (set TORCH_COMMAND=pip install torch==1.12.1+cu113 --extra-index-url https://download.pytorch.org/whl/cu113)
if not defined REQS_FILE (set REQS_FILE=requirements_versions.txt)

mkdir tmp 2>NUL

%PYTHON% -c "" >tmp/stdout.txt 2>tmp/stderr.txt
if %ERRORLEVEL% == 0 goto :setup_venv
echo Couldn't launch python
goto :show_stdout_stderr

:setup_venv
if [%VENV_DIR%] == [-] goto :skip_venv

dir %VENV_DIR%\Scripts\Python.exe >tmp/stdout.txt 2>tmp/stderr.txt
if %ERRORLEVEL% == 0 goto :activate_venv

for /f "delims=" %%i in ('CALL %PYTHON% -c "import sys; print(sys.executable)"') do set PYTHON_FULLNAME="%%i"
echo Creating venv in directory %VENV_DIR% using python %PYTHON_FULLNAME%
%PYTHON_FULLNAME% -m venv %VENV_DIR% >tmp/stdout.txt 2>tmp/stderr.txt
if %ERRORLEVEL% == 0 goto :activate_venv
echo Unable to create venv in directory %VENV_DIR%
goto :show_stdout_stderr

:activate_venv
set PYTHON="%~dp0%VENV_DIR%\Scripts\Python.exe"
%PYTHON% --version
echo venv %PYTHON%
goto :install_torch

:skip_venv
echo Skip
%PYTHON% --version

:install_torch
%PYTHON% -c "import torch" >tmp/stdout.txt 2>tmp/stderr.txt
if %ERRORLEVEL% == 0 goto :check_gpu
echo Installing torch...
%PYTHON% -m %TORCH_COMMAND% >tmp/stdout.txt 2>tmp/stderr.txt

if %ERRORLEVEL% == 0 goto :check_gpu
echo Failed to install torch
goto :show_stdout_stderr

:check_gpu
%PYTHON% -c "import torch; assert torch.cuda.is_available(), 'CUDA is not available'" >tmp/stdout.txt 2>tmp/stderr.txt
if %ERRORLEVEL% == 0 goto :launch
echo Torch is not able to use GPU
goto :show_stdout_stderr

:launch
echo Launching prune.py...
%PYTHON% prune.py
pause
exit /b

:show_stdout_stderr

echo.
echo exit code: %errorlevel%

for /f %%i in ("tmp\stdout.txt") do set size=%%~zi
if %size% equ 0 goto :show_stderr
echo.
echo stdout:
type tmp\stdout.txt

:show_stderr
for /f %%i in ("tmp\stderr.txt") do set size=%%~zi
if %size% equ 0 goto :show_stderr
echo.
echo stderr:
type tmp\stderr.txt

:endofscript

echo.
echo Launch unsuccessful. Exiting.
pause