Pilgrim

Pilgrim is a disk-image compiler. This means that it converts collections of packages (RPMs) and hacks into clean-installable disk images for the XO. It is typically run on a dedicated Linux server or virtual machine like xs-dev.laptop.org or pilgrim.laptop.org. 2010 OLPC builds use the OS Builder utility instead.

When the OLPC:Volunteer Infrastructure Group is up and running, we should link to pages describing the build infrastructure in detail.

More information on pilgrim is at Building custom images.

Details

Source code

Pilgrim is composed of two large and two small scripts and many configuration files.

 pilgrim              # user-interface
 pilgrim-autobuild    # implementation
 build-one            # build the current branch
 make-repos           # touch up yum repositories

The most important branch is "autobuild". This is where changes deemed suitable for all build branches should be merged. See Pilgrim Commit Policy.

The other branches - joyride, meshtest, xtest, and rainbow store branch-specific data like which yum repositories to compose into the image, which packages to pull, which activities to include, and so on.

These data are mostly recorded in

 streams.d/olpc-branch.conf                    # a few important config variables
 streams.d/olpc-development-yum-install.conf   # yum repositories to compose, package exclusions
 streams.d/olpc-development.stream             # lists of packages and activities to install

Questions:

• How do you enumerate the available branches? I.e. if you don't want to rely on the documentation being kept up to date...
• Where can one find the streams.d directory?