Re: Handling RA extensions between 1.x releases

Peter N. Lundblad wrote:

>Hi,
>
>Issue 1846 (and also my blame optimization, but that's awaiting
>proof-of-concept performance testing) brings up the question how to handle
>extensions to the RA layer between 1.x releases. There are four
>parts to this:
>
>a) Where to put the fallback?
>b) the svn_ra_plugin_t
>c) ra_dav extensions
>d) ra_svn dito.
>
>a) Fallback
>For backwards compability, we need a fallback implementation somewhere in
>the client. We can implement the callback in terms of other RA layer
>functions where the new functionality would be used.
>
>A question is how to detect that the functionality is missing. Is that
>what SVN_ERR_RA_NOT_IMPLEMENTED is for?
>
>
There are two sides to this question:

    * How does a new server know it's talking to an old client?
    * How does a new client compensate for functionality missing in an
      old server?

You only addressed the second question.

-- 
Brane Čibej   <brane_at_xbc.nu>   http://www.xbc.nu/brane/
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