🏁 Windows: `pwd` not available

[Evan1578]

Hi all,

I am currently trying to try to run the default C-PAC pipeline through a Docker container using C-PAC Python package. However, after installing C-PAC and Docker, I am running into the error - "ModuleNotFoundError: No module named 'pwd' " with stack trace:

(venv) C:\Users\Evan\PycharmProjects\DataScienceProject\venv\TDAfMRI>cpac run --help
Traceback (most recent call last):
File "C:\Users\Evan\AppData\Local\Programs\Python\Python38\lib\runpy.py", line 194, in run_module_as_main
return run_code(code, main_globals, None,
File "C:\Users\Evan\AppData\Local\Programs\Python\Python38\lib\runpy.py", line 87, in run_code
exec(code, run_globals)
File "C:\Users\Evan\PycharmProjects\DataScienceProject\venv\Scripts\cpac.exe_main.py", line 7, in
File "c:\users\evan\pycharmprojects\datascienceproject\venv\lib\site-packages\cpac_main.py", line 397, in run
main(parsed)
File "c:\users\evan\pycharmprojects\datascienceproject\venv\lib\site-packages\cpac_main.py", line 307, in main
Backends(**arg_vars).run(
File "c:\users\evan\pycharmprojects\datascienceproject\venv\lib\site-packages\cpac\backends_init_.py", line 20, in Backends
from .docker import Docker
File "c:\users\evan\pycharmprojects\datascienceproject\venv\lib\site-packages\cpac\backends\docker.py", line 6, in
from cpac.backends.platform import Backend, Platform_Meta
File "c:\users\evan\pycharmprojects\datascienceproject\venv\lib\site-packages\cpac\backends\platform.py", line 3, in
import pwd
ModuleNotFoundError: No module named 'pwd'

Does anyone understand this error and how it can be avoided?

Version Details

• Windows 10 x64 system
• Python 3.8.8
• Docker version 20.10.5, build 55c4c88

[shnizzedy]

Duplicate of shnizzedy/cpac#14

Unfortunately cpac (Python package) doesn't yet support Windows.

However, you should be able to run C-PAC directly in Docker on Windows. The usage is similar, but when running directly you need to specify volume mount bindings (-v /path/on/host:/path/in/container) and you'll probably want to specify keep STDIN open and interactive (-it) and clean up (--rm).

Just getting the help string for run doesn't need any directory bindings, so the equivalent of

cpac run --help

would be

docker run --rm -it fcpindi/c-pac:latest --help

[shnizzedy]

Original thread from shnizzedy/cpac#14:

pwd is not available on Windows, so

https://github.com/shnizzedy/cpac-python-package/blob/9c3dcd6a2102b49fc7014a50a8043d7e4c97485b/src/cpac/backends/platform.py#L59

won't work on Windows.
― @shnizzedy commented on Apr 30, 2020

Can make Windows low priority, at least for now.
(Sorry Windows)
― @sgiavasis commented on May 1, 2020