This is a tutorial for git-builder. See also cowbuilder. git-pbuilder is part of the package git-buildpackage and the usage is very similar to cowbuilder. git-builder needs sudo rights!
Initialization and Variants
You can create base images for all processor family (mostly i386 or amd64) and platforms (mostly Lenny, Squeeze, Testing/SID, Ubuntu xxx, ...) that your hardware can run on.
The easiest usage is to call no further options, that will create a Testing/SID build environment with the processor family you are currently running on (if you are using i386, the environment will also be created for i386):
The base build image is created in /var/cache/pbuilder/base.cow/
Creating other Platforms
If you want explicitly create a environment for i386 (and running on amd64) you have to tell that git-pbuilder:
ARCH=amd64 git-pbuilder create
The base build image is created in /var/cache/pbuilder/base-sid-amd64.cow/
Creating Packages for other Distros
Mainly package creating is done in the Testing release, sometime you want to create packages for the stable release, so you to tell this also while git-pbuilder is creating the environment. If you want to build for the Squeeze release then you have to git-pbuilder like this:
DIST=squeeze git-pbuilder create
The base image is created in /var/cache/pbuilder/base-squeeze-[your-platform].cow/
Using a Mirror
If you use git-builder (or git-buildpackage) very offen it's better to use a local mirror to save downloadtime and reduce traffic. If you have set up a local Apt proxy the you can tell git-pbuilder to use it. Let's say you want to create a base image for Squeeze and i386 with a caching proxy with the IP 192.168.110.4 on port 3142 (like apt-cacher-ng), so it's a combination of all variants from above:
DIST=squeeze ARCH=amd64 git-pbuilder create --mirror=http://192.168.110.4:3142/ftp.de.debian.org/debian
The base build image is created in /var/cache/pbuilder/base-squeeze-amd64.cow/
If the creation of your build environment is quite older you have to update it before you can use it. To update the base image just run:
The update for the possible other distros or platforms is similar like the creation of it. Update the Squeeze environmnt for the same platform you are currently running on would be:
DIST=squeeze git-pbuilder update
or for Squeeze on i386
DIST=squeeze ARCH=i368 git-pbuilder update
If you have used a mirror while creating the base images it will be used! So remember that if you have various networks you working, the update will fail if the mirror isn't reachable.
Slow copying and removing of the COW directory
What cowbuilder does is:
cp -al /var/cache/pbuilder/base.cow /tmp/new rm -rf /tmp/[new]
Of course cowbuilder uses a different location than /tmp/[new]. You need to optimize those 2 commands on your computer. They should take around 0.2s each. If not, try to use the ext3 filesystem, for more details, see our benchmarks.