fatal: ambiguous argument 'HEAD'

[northern]

Hi there.

Just following the instructions on the main page of this project, step by step. After I do:

git subtree add --prefix=vm symfony-vm master

I get the following:

fatal: ambiguous argument 'HEAD': unknown revision or path not in the working tree.
Use '--' to separate paths from revisions, like this:
'git <command> [<revision>...] -- [<file>...]'
Working tree has modifications.  Cannot add.

Not sure how to resolve this.

[bezhermoso]

Hi @northern!

Can you try doing git fetch symfony-vm master first before the git subtree command?

[bezhermoso]

Ok, I know what's causing this:

You have to have a clean tree before being able to subtree stuff. After git init, you have to first add and commit everything and so you have a clean working directory.

After that you should be able to do git subtree add ... with no problem :)

Let me know if you encounter any problems.

[dhirajunraveldata]

I am still have the same issue even after starting with clean directory. Is there any resolution for the problem ?

fatal: ambiguous argument 'HEAD': unknown revision or path not in the working tree.
Use '--' to separate paths from revisions, like this:
'git [...] -- [...]'
Working tree has modifications. Cannot add.

My git version is : git version 1.9.5 (Apple Git-50.3)

I found a fix.
if I add a dummy file and commit it than there is no error.