Nguyen Thai Ngoc Duy <> writes:

> "~" is a shell feature. Know your shell. If we make an exception for
> --git-dir, we might have to support --blahblah=~/somewhere.

Correct but not entirely true.

When we know --git-dir=<path> must name a path, we should be able to
do better.  See OPT_FILENAME in >parse-optios.h>, for inspiration.

MJG's patch later in this thread is conceptually OK but I do not
think it should introduce a "expand and then setenv" helper that
won't be useful unless the variable is GIT_DIR.  That pattern does
not appear that often, and smells like a bad API design taste.

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