Once Bazaar is installed and set up you can use Bazaar to download and then keep updated the current development version of Drupal.
The Bazaar mirror of the development version of Drupal is at http://bazaar.launchpad.net/~vcs-imports/drupal/main
Getting Drupal can take between 2 and 10 minutes.
The short version for getting Drupal is
bzr branch lp:drupal
The longer version for getting Drupal is
bzr init drupal
cd drupal
bzr pull http://bazaar.launchpad.net/~vcs-imports/drupal/main
If you forget to initialize you run into this error bzr: ERROR: Not a branch: "/x/y/z/".
Later on, a simple command will keep you up to date:
bzr pull
We'll cover how to update a Drupal branch that you have modified in a later chapter. Don't worry; the process is almost as easy.
Comments
If you follow the "longer
If you follow the "longer version for getting Drupal" instructions, with Bazaar 2.2.0 on Windows, your local repository will be initialized with a different format, you will get a "Doing on-the-fly conversion from RepositoryFormatKnitPack1() to RepositoryFormat2a()." message, it will take a long time, and will probably not complete.
"bzr branch lp:drupal" works like a charm.