Re: [PATCH] git-gui: give more advice when detaching HEAD

Johannes Sixt [off-list ref] writes:

quoted

On Sat, Feb 12, 2011 at 09:42, Junio C Hamano [off-list ref] wrote:

quoted

That way, the traversal will terminate much sooner than computing the
true merge base.

Since we want to use this in git-gui, do you intend to expose this as
a command somehow (e.g. 'git rev-parse --reachable HEAD --all' or
somesuch)?

What's wrong with checking the output of

  git rev-list -1 HEAD --not --branches --tags --

for zero length?

Nothing, except that (1) that approach won't catch refs outside heads and
tags (like the ones I have in refs/merge-fixes and refs/hold), and (2) it
won't have an early termination optimization I mentioned either.

I don't know how much the early termination optimization matter in
practice, though.  It would probably depend heavily on where you begin.