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Re: Yum-presto (deltarpms) ready for testing.



On Tue, 2007-03-27 at 15:25 +0200, Tim Lauridsen wrote:
> seth vidal wrote: 
> > Why is that? I need to take a look at the code but there doesn't seem to
> > be any reason why it shouldn't be able to fall back to downloading the
> > whole package. It knows where it is.
> > 
> > -sv
> > 
> >   
> I look at the code, it works in the following way: 
> 
> postresolve_hook(conduit):
>     for each po to be install in TransactionSet:
>         check if delta as available.
>         make the po point to the delta insted of the full rpm.
> 
> normal yum downloading (yum.downloadPkg)
> 
> postdownload_hook(conduit):
>     for each pkg in the downloadpackages:
>           if pkg is a delta:
>              try:
>                    build the full rpm from the delta
>              except:
>                    Something is rotten in the state of Denmark, bail
> out.
> 
> if could be changed to:
> predownload_hook(conduit,pkglist):
>     for each po in pkglist:
>         if as delta is available:
>             try:  
>                 download the delta (copy the download code from
> yum.downloadPkgs)   
>                 build the full rpm.
>                 set po.pkgtype = 'local' # To make yum skip it in the
> normal download.
>              except:
>                 Something is rotten in the state of Denmark, just
> leave the po unchanged an yum will handle the download as normal.
> 
> normal yum downloading (yum.downloadPkg)
>    will download all the packages not processed without error, by the
> predownload_hook.
> 
> Tim

If it's agreed that this is the best way, I'm happy to make it work this
way.

Jonathan

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