wor...@alum.mit.edu (Dale R. Worley) writes:

> I must admit I've never seen the design (and I personally doubt that
> the design has ever been written down).  But at least the following
> commands work correctly on a detached worktree if the current
> directory contains the .git directory, because I am using them in a
> production manner:
>     git add

If you have this:


where proj-wt1 is a working tree for that proj.git repository, the
idea was to set these:

        export GIT_DIR GIT_WORK_TREE

and then working in /working/trees/proj-wt1 or any of its
subdirectory should work as if you did not have these two
environment variables and had /working/trees/proj-wt1/.git instead
of /repositories/proj.git as the repository.  To make that use case
work was the motivation behind these environment variables.

        Side note: without GIT_WORK_TREE environment (or
        core.worktree), there is no way to tell where the top level
        is, so you were limited to always be at the top level of
        your working tree if you used GIT_DIR to refer to a
        repository that is not embedded in your working tree.  There
        were some changes in this area, but I do not recall the
        details offhand.

Now, when you say "the cwd contains the .git directory", do you mean

        cd /repositories
        git add ../working/trees/proj-wt1/file

updates "file" in the /repositories/proj.git/index?  Or do you mean

        cd /repositories/proj.git
        git add ../../working/trees/proj-wt1/file

Or this?

        cd /repositories
        edit ../working/trees/proj-wt1/file
        git add file

Most of the commands you listed do not need to look at the actual
working tree files, so I would expect e.g. "git log" or "git log
paths..." to work but I am wondering what your definition of "works"
with respect to the pathspecs, especially when you talk about
starting Git command _outside_ the working tree (whether the working
tree has its repository embedded in it is not very relevant).

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