Re: [PATCH] rev-parse --git-path: fix output when running in a subdirectory

> In addition to making git_path() aware of certain file names that need
> to be handled differently e.g. when running in worktrees, the commit
> 557bd833bb (git_path(): be aware of file relocation in $GIT_DIR,
> 2014-11-30) also snuck in a new option for `git rev-parse`:
> `--git-path`.
>
> On the face of it, there is no obvious bug in that commit's diff: it
> faithfully calls git_path() on the argument and prints it out, i.e. `git
> rev-parse --git-path <filename>` has the same precise behavior as
> calling `git_path("<filename>")` in C.
>
> The problem lies deeper, much deeper. In hindsight (which is always
> unfair), implementing the .git/ directory discovery in
> `setup_git_directory()` by changing the working directory may have
> allowed us to avoid passing around a struct that contains information
> about the current repository, but it bought us many, many problems.