[MERGE/RFC] Content filters - take 6

[Robert Collins]

On Fri, 2009-02-20 at 08:57 -0600, John Arbash Meinel wrote:
> 
> > 
> > This method get_file_with_stat seems a bit dangerous because the
> > size in the stat object may be inconsistent with what's actually
> > returned; I'd like to see if we could deprecate this method.
> 
> The reason to have it was to have a "non-racing" implementation to get
> the content and the stat. Otherwise if you read at a separate time
> than
> you stat, something could have changed in the mean-time.
> 
> I believe the stat is only really used to pass back to the dirstate to
> have it mark the file as "unchanged since last commit".

Yah, its an abstraction on file handle basically. If the size changes we
get a stat cache miss -> no problem. And the stat we get is the stat on
the file we read, not on a different file mv'd into place during the
commit.

-Rob

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