[issue767] add csup to world

[YONETANI Tomokazu]

On Sat, Sep 01, 2007 at 12:57:11PM -0700, walt wrote:
> Peter Avalos wrote:
> >On Sat, Sep 01, 2007 at 04:21:28PM +0200, Simon 'corecode' Schubert wrote:
> >>Peter Avalos wrote:
> >>>Although I agree that this doesn't help with the server part (mainly 
> >>>used by the source mirrors), won't this help end-user clients?
> >>But why should we add this to world?
> >
> >I'm not sure.  If it's in pkgsrc, can anyone think of why we need it
> >in world?
> 
> The csup in pkgsrc still doesn't work properly with the version of CVS
> used in DF.  IIRC Yonetani-san posted a patch many months ago.

This comes from how cvsup servers out there respond to a client when it
found an RCS keyword unknown to it (refered to as "newphrase" in rcsfile(5)).
in an RCS file.  In such a case, cvsup server tries to send a delta command
with that unknown keyword (marked as 'n' or 'N' as desribed in doc/Protocol
found in cvsup source distribution).  The server sends this special command
even if it's running in check out mode, in which clients usually doesn't care
about the changes in RCS keywords (well, at least as of cvs-1.12.13, future
versions of cvs or rcs may add a new keyword which may affect checkouts).

The current cvsup client code doesn't do anything for such commands.
The current csup implementation aborts as soon as it found a delta command
with sub commands other than 'L', 'S', or 'T'.
My patch changes csup to also accept the delta commands with 'n'/'N'
and do nothing.

Maxime seemed to consider it was a bug in cvsup server or the protocol
to send delta commands which have nothing to do with checkout mode, so
he didn't want to add a workaround for no reason.  I agree with this,
but I also care about how long it takes for cvsup mirrors around the world
to update to a newer cvsup version, especially when the problem is only
critical to csup users trying to checkout a CVS repository containing
commitid keyword.

Cheers.