Working patterns

The pattern I use is to have this:

        /repository/.git
		with core.worktree = /working
        /working/...

then

        cd /repository
        git add /working/x/y
        git ...

The point I'm trying to make is that it appears that all of the Git
commands implemented as programs use the same code at the beginning to
determine the location of the Git repository and the root directory of
the work tree -- to determine GIT_DIR and GIT_WORK_TREE effectively.
And the code works with my work pattern, which seems intuitively
correct to me.

It seems to me that this code should implement the design, and the
design should match what the code does.

However, the parallel code in the Git commands that are scripts, which
seems to be in git-sh-setup, does not implement the same design as the
C code does.

It seems to me that the two sets of Git commands should be invokable
under the same circumstances, that there is a design specification as
to how Git can be invoked, and both implementations should match that.

Dale