[PATCH 1 of 4] match: make _fileroots a @propertycache and rename it to _fileset

[Yuya Nishihara]

On Thu, 18 May 2017 11:03:43 -0700, Martin von Zweigbergk via Mercurial-devel wrote:
> # HG changeset patch
> # User Martin von Zweigbergk <martinvonz at google.com>
> # Date 1495123477 25200
> #      Thu May 18 09:04:37 2017 -0700
> # Node ID 48275b23f01283fdf1ae6e630c2c63660528edfc
> # Parent  0d6b3572ad924103128bb9cd296000fc6fd821ef
> match: make _fileroots a @propertycache and rename it to _fileset

Looks good overall. Queued, thanks.

> @@ -399,7 +402,6 @@
>                  return matcher.visitdir(self._path)
>              return matcher.visitdir(self._path + "/" + dir)
>          self.visitdir = visitdir
> -        self._fileroots = set(self._files)

This change should be fine as self._fileset is never be cached in __init__().