[PATCH] [PATCH 04 of 11 RFC] histedit: add execute function (issue4036)

[David Soria Parra]

Olle Lundberg <olle.lundberg at gmail.com> writes:
>  
> +def execute(ui, repo, ctx, cmd, opts):
> +    hg.update(repo, ctx.node())
> +    rc = util.system(cmd)

I think it would be nice to populate a HGREVISION and HGNODE environment
variable at this point.