I think the quotation marks are unneeded, FWIW. Ditto in arcgit.

Hm... this will print the path relative to the -C argument. Shouldn't it be git=${git_dir}/$(git ...) ?

Looks like this check should come earlier?

Hm, on my machine I get an absolute path. What version of git do you have? I have 2.8.1.

Indeed

Lovely, seems like a regression then:

$ cd /
$ git -C /home/markj/src/freebsd-dev rev-parse --git-dir
.git
$ git --version
git version 2.10.1
$

Nope, I see the same behaviour from a native git tree. It's only work trees that give absolute paths. *sigh*

Compounding my confusion, old-style worktrees created with git-new-workdir also give relative paths.