git says "not under version control" for just-checked-out file

Another quirk that left me frustrated is if you're using the command line, it will use your current path to git mv the file. So if you have a file in C:\Git\MyRepo\MyFolder\MyFile.txt

If you do:

c:

cd git

cd myrepo

cd myfolder

dir

It will work fine, you'll see your file. But if you type git mv MyFile.txt MyFile2.txt you will get an error because git can't find Myfile.txt.

The reason is that it's looking at your current path, which is c:\git\myrepo\myfolder\

But git is case sensitive. So you have to go back and type

c:

cd Git

cd MyRepo

cd MyFolder

If you then type git mv it will work fine.

Putting this in as an answer for people like me that found this post while debugging this error message.

Maybe App/android/AndroidManifest.xml does exist, but with a diferent case (like App/android/androidmanifest.xml, which would mean that App/android/AndroidManifest.xml isn't versioned (hence the error message):

Doing the git mv with the right case should then be enough.

The OP explains in the comments:

What happened was that there were two folders in Git, "App" and "app".
When I checked out the repo under Windows, because of the case-insensitivity of Windows, it actually overlayed the two folders into one into "App".
Which meant, the directory structure was fine, but half of the files (the ones coming from the "app" side) had an invalid Git path!