~bzr-pqm/bzr/bzr.dev

Overview

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High level upgrade process

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In broad terms, there are 3 steps involved in upgrading to Bazaar 2.x:

1. Upgrade the core software

2. Upgrade required plugins

3. Migrate data to the new default format.

Bazaar 2.x supports branches in earlier formats so the third step is

strictly not required. However, the new default format in Bazaar 2.x

is more space efficient, faster on large projects and provides a range

of new features, so it is recommended that most projects migrate to it

at a convenient time.

For most users, upgrading to 2.x and migrating to the new format is

straight forward. For projects with a large community of developers

though, things become more complex. In these cases, careful planning

and good communications become essential. This document provides

general advice which aims to assist in this regard. If in doubt,

please contact us on our mailing list or IRC channel with any

questions or concerns you have.

Upgrading the core software

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The steps required to upgrade the core software vary from operating

system to operating system. There is nothing special about upgrading

from Bazaar 1.x to Bazaar 2.0 compared to upgrading from Bazaar 1.x

to Bazaar 1.y. In either case, a brief outline of the steps is given

below.

To upgrade Bazaar on Linux:

1. Ensure your package manager is configured with the required

   software sources, e.g. the official release PPA for Ubuntu:

   https://launchpad.net/~bzr/+archive

2. Use your package manager to upgrade to the latest version.

To upgrade Bazaar on Windows:

1. Uninstall the existing version using Add/Remove Programs.

2. Install the new version using the relevant installer.

To upgrade Bazaar on OS X (via the installer):

1. Install the new version using the relevant installer.

To upgrade Bazaar on OS X (via MacPorts):

1. Refresh the package metadata using **sudo port selfupdate**

2. Upgrade to the latest version using **sudo port upgrade bzr**

For further information on installing and upgrading, see

http://bazaar-vcs.org/Download.

Upgrading required plugins

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Many plugins are not dependent on a particular Bazaar version so

upgrading them is optional. Other plugins, notably bzrtools and

bzr-svn, are more tightly associated with Bazaar's APIs so these

typically need to be upgraded in lockstep with the core software.

For Windows and OS X users, bzrtools and bzr-svn are typically

included in the installer so no special steps are required to upgrade

these. For Linux and UNIX users, bztrools, bzr-svn and many other

popular plugins can be installed and upgraded using your

platform's package manager, e.g. Synaptic on Ubuntu.

Migrating data to the new default format

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As mentioned earlier, the complexity of migrating to a new format

depends on several factors, particularly project community size.

It also depends on how data is currently stored, e.g. in a

standalone branch, multiple branches in a shared repository,

stacked branches on Launchpad, etc. These various scenarios are

covered in the next chapter.