Using bzr to update a series for patches

[Chris Packham]

Hi,

I'm trying to update a series of raw patches for an upstream project
that is managed with bazzar (for creating an RPM from pristine tarball
+ patches). We have 30 or so patches with our customizations so I'd
like to get bzr to do the heavy lifting for me. I haven't really used
bzr for anything serious but I have done similar things for upstream
projects using git.

In git I'd do something like this

git clone <upstream>
git checkout <tag that corresponds to the version of the tarball we use>
git checkout -b our-patches
git am <patches>
git rebase <tag that corresponds to the new version we want to use>
# fix merge issues with 'git merge-tool' or similar
git format-patch ...

Has anybody got a similar recipe for bzr?