assertion failed errors when trying to git subtree split

Question

I have a private GitHub repo (which I can't share here) cloned locally. I want to split a subfolder in this repo into a new subtree repo. I'm following these instructions Using Git subtrees for repository separation (under Splitting code into its own repository).

My specific command is:

> git subtree split -P .\plugins\rg-feed-client -b rg-feed-client

however it fails with exactly 24 "assertion failed" error messages that look like this:

1/     26 (0)2/     26 (1)assertion failed:  [ plugins/rg-feed-client = .\plugins\rg-fee
3/     26 (2)assertion failed:  [ plugins/rg-feed-client = .\plugins\rg-feed-client ]
...
26/     26 (25)assertion failed:  [ plugins/rg-feed-client = .\plugins\rg-feed-client ]

If I try any other subfolder, the exact same happens. I have no idea what may be wrong here... HELP!

My repo has 2 remotes: origin, and a remote for an existing subtree that I added to my repo.

Answer 1

Split -P can't gracefully handle directory path . Use following command instead -

git subtree split --prefix=plugins/rg-feed-client -b rg-feed-client

A few points to remember -

1. Avoid prefixing ./ with path i.e instead of ./plugins/rg-feed-client use plugins/rg-feed-client

2. Avoid any trailing / after the path , i.e NO plugins/rg-feed-client/

Answer 2

This was probably due to the backslashes in --prefix (I was running Windows back then.)