[PATCH 1 of 3 V4] revset: record if a set is in topographical order

[Yuya Nishihara]

On Tue, 14 Jun 2016 11:29:11 +0100, Martijn Pieters wrote:
> # HG changeset patch
> # User Martijn Pieters <mjpieters at fb.com>
> # Date 1465898736 -3600
> #      Tue Jun 14 11:05:36 2016 +0100
> # Node ID 99d323953b81516541cbdd0898e9bc1017eb9e28
> # Parent  c27dc3c31222c7f74331221a3d25566146feecac
> revset: record if a set is in topographical order

Queued the series with trivial typo fixed, thanks.

> diff --git a/mercurial/cmdutil.py b/mercurial/cmdutil.py
> --- a/mercurial/cmdutil.py
> +++ b/mercurial/cmdutil.py
> @@ -2147,7 +2147,7 @@
>      if opts.get('rev'):
>          # User-specified revs might be unsorted, but don't sort before
>          # _makelogrevset because it might depend on the order of revs
> -        if not revs.isdescending():
> +        if not (revs.isdescending() or revs.istopo()):
>              revs.sort(reverse=True)
>      if expr:
>          # Revset matchers often operate faster on revisions in changelog

You'll need to stop sorting in "if expr" after my patches are landed. I'm
fixing the issue of unstable ordering.