sprint report so far

[Robert Collins]

So we're here in sunny Vilnius sprinting on bzr. I thought I'd write up
some of what we've achieved.

On Thursday Wouter got most of the nested-trees branch merged up with
bzr.dev, but about 500 tests failing ;). Jelmer has introduced a new
parameter to the sprout api call on BzrDir called 'limit_to_revisions'
which if supplied is a set of revisions which forms a strict limit on
the amount of data to be fetched. This is intended to be the API by
which the desire for limiting history - to achieve shallow
branches/history horizons - is communicated at the 'bzr branch' or 'bzr
checkout' stage. This API is tested so everything passes, but nothing
chooses to implement it yet. I was hacking on commit (somewhat
indirectly) by working on the repository-wide indexing logic we will
require if we wish to move to a more free-form database with
semi-arbitrary keys mapping to opaque data (at the lowest level). I got
a core GraphIndex up at this point. There was some other hacking going
on too - Tim Hutch did some tweaks to bzr-hg, Jelmer some bzr-svn, and
so on.

On Friday we carried on on the same basic targets: Wouter fixed the 500+
failing tests so now its only in the 5-10 range, and has been debugging
them one by one since. Jelmer implemented the limit_to_revisions
parameter all the way down to the knit level, for non-delta compressed
knits (e.g. revisions.knit), which made knit1 repositories support the
parameter and got the 'supports' branches of the interface tests being
executed. I developed CombinedGraphIndex, and have sent the low level
Index stuff up for review, and followed that up by implementing a
KnitIndex implementation that layers on the GraphIndex API to allow the
use of .knit files without .kndx. This new index API allows us to switch
out the indexing code and format much more easily than previously - the
knit index logic is decoupled from the generic indexing facilities. It
also allows us to record arbitrary-parent compression chains. Finally
Jelmer implemented the wishlist item for bzr-gtk of a notification area
widget that can be used to enable bzr-avahi watching, and share commits
with the local LAN/get notified of commits on the local LAN.

Today is the last day of the sprint, and I hope that we'll get the
nested tree branch passing all tests, the limit_to_revisions parameter
causing delta-compressed knits to only copy data outside the listed
parameters to the first full text, and have an experimental repository
format that uses the new index layer for at least a couple of its knits
(e.g. revisions and inventory, or revisions and signatures).

Cheers,
Rob


-- 
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