Support for external commands?

[skshetry]

It'd be amazing to have a support for external command being able to run dvc <cmd> by just having a dvc-<cmd> in the user's PATH, similar to git.

Looking at the argparse, it does not seem to be possible to add support for default subparser or a fallback subparser. So, we may be need to add all the commands from the PATH matching dvc- prefix during ArgumentParser build. Also may need to take into account a few things for windows
(eg: PATHEXT, current directory has higher precedence, multiple executable extensions, etc.).

Also see: iterative/cml#699.

[daavoo]

What about also allowing users to register custom commands via entry-points:

https://packaging.python.org/guides/creating-and-discovering-plugins/#using-package-metadata

[skshetry]

Closing, so far there has not been a usecase. live command was deprecated/removed.