bzr loves Ubuntu @ UDS

[Robert Collins]

On Wed, 2009-11-18 at 17:36 -0600, Jelmer Vernooij wrote:
> Hi Vincent,
> 
> Thanks for writing this up.
> 
> On Wed, 2009-11-18 at 16:49 -0600, Vincent Ladeuil wrote: 
> > Many discussions and sessions related to the daily builds and the source
> > packages have happened here already.
> > 
> > It's a bit hard to report about them without repeating a lot of things
> > that has been covered during our bzr sprint, so I'll try to focus on the
> > main differences (at least in my understanding, feel free to correct
> > me).
> > 
> > 1) code imports
> > 
> > First of all, I'll appreciate some rehash of the arguments about why
> > code imports should be at priority #2 behind mini-grumpy.
> > 
> > There seem to be many problems around branches with different histories
> > between the upstream, debian and ubuntu branches. The sooner we get the
> > first ones via code imports the less problems of history rewriting we'll
> > have to deal with. Is there something wrong with that reasoning ?
> > 

> +1, it seems a lot easier to get the history right in the first place
> than to fix it up later on.

The reasoning we have is:
 - we know that ~ 25% of imports fail at the moment (maybe 50% on first
attempt, and then we whittle it down).
 - We don't want to block users on imports. Better to have a productive
user now with a history rewrite down the track (because we know how to
do history rewrites), than an unproductive user until their particular
import works.

'imports' is a piece of string problem: its never ending and continually
lengthening. Thats why its #2: we can deliver daily builds where we have
the imports, and make that work well, and then every import we add
increases the value of the daily builds. If we do it the other way
around, no-one gets daily builds until 'all the imports are working'.

-Rob
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