Git: fatal: Pathspec is in submodule

I wanted to make a subdirectory stop being a git submodule. This worked for me:

$ mv subdir subdir2
$ git rm --cached subdir
$ mv subdir2 subdir

It seems the git add context is the parent repo ("parent" means the one including the submodule), which triggers the warning.

Try and change its context with:

cd _site
git --git-dir=.git --work-tree=. add . 
git --git-dir=.git --work-tree=. commit -m "new files"

Don't forget that, if this works, you would still have to go back to the parent repo, and git add _site, since the subrepo would have changes.

And you would have to push both.

---

Update January 2017 (2+ years later)

With Git 2.12, you won't see that prefix_pathspec: Assertion anymore.

See commit 2d81c48 (09 Jan 2017) by Stefan Beller (stefanbeller).
Helped-by: Jeff King (peff), and Junio C Hamano (gitster).
^{(Merged by Junio C Hamano -- gitster -- in commit 00880a1, 18 Jan 2017)}

pathspec: give better message for submodule related pathspec error

Running "git add a/b" when "a" is a submodule correctly errored out, but without a meaningful error message.

Removing the directory from git and adding it again worked for me:

 git rm --cached directory
 git add directory

This works if you purposefully removed the .git directory because you wanted to add directory to your main git project. In my specific case, I had git cloned an extension and ran git add . without thinking too much. Git decided to create a submodule, which I didn't like. So I removed directory/.git and ran into Git: fatal: Pathspec is in submodule. I couldn't find out how to remove the submodule stuff. Fixed with the two lines above.