vc-dir mode: marking modified files after pull

[Sam Steingold]

Hi,

ISTR that when I updated in CVS, the files which were modified by the
update were marked as such in the vc-dir buffer.

Is there a way to do that with git and hg?

With git the answer seems to be
$ git diff --name-status ORIG_HEAD..
(http://stackoverflow.com/questions/6535150/git-pull-change-log)

With hg it appears that the information has to be extracted before update:
$ hg status --rev .:tip
(http://stackoverflow.com/questions/3277334/what-files-will-be-changed-vs-added-when-i-do-an-hg-pull-and-hg-update)

So the information is available.
The question is, what has to be changed in vc-dir.el?

Thanks.

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Sam Steingold (http://sds.podval.org/) on darwin Ns 10.3.1343
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