Any sufficiently advanced technology is indistinguishable from magic...

This is in the very early stage of something which should become a howto to understand the build process of the Debian Edu (install) cd - please help to improve it. I will do so too, on my way to eternal wisdom and happyness :-)

debian-cd

We are using two different branches of debian-cd. The svn://svn.debian.org/debian-cd/etch_r0_build branch is used to build etch cd's. And svn://svn.debian.org/debian-cd/trunk is used to build post-etch cd's. The reason for this is, that when debian release a revision update, they update the etch branch and we'd have to backport those updates in our patch if we wanted to build etch using trunk.

the upstream code for the version of debian-cd we're using is at /home/builder/src/debian-edu/src/build/CD-administrator/debian-cd.[etch|trunk] The upstream code is updated from svn by the patch-debian-cd script and uses the revision number found in the debian-cd-revision file. This makes it easier to merge in ustream changes when we have time to update our patch. And also easier to move back incase of severe breakage.

Since we use 2 branches we also have 2 patch files. debian-cd.patch.[etch|trunk]

During every build the matching upstream branch is patched by debian-edu/src/build/CD-administrator/patch-debian-cd <$branch> with debian-edu/src/build/CD-administrator/debian-cd.patch.$branch the result is put into debian-cd, where the build is executed.

If you want to exclude certain packages from the cd, there is a exclude-etch list (also used for etch-test) in that patch.

cd-build logs

the logs from each cd build are commited to svn (debian-edu/html/logs/cd-build-$suite.log). the commits are silent, so no commit-mail is sent. You can read the logs in the individual cd-suite directories in http://ftp.skolelinux.no

force re-build

all developers can force a build by using the command /home/builder/bin/trigger_builds on user.skolelinux.org - trigger_build takes on argument: the image to rebuild or "all".

how to exclude packages from the cd

Get the curret status

  1. grab CD-administrator with svn co svn+ssh://$alioth-user-name@svn.debian.org/svn/debian-edu/trunk/src/build/CD-administrator

  2. cd CD-administrator
  3. patch using ./patch-debian-cd

edit the patch

how to merge in changes from upstream

  1. increment debian-cd-revision, svn
  2. patch both the trunk and the etch branch using using ./patch-debian-cd [etch|trunk]

  3. if both patches succeeds, you can commit debian-cd-revision, and wait for the cd to build.
  4. if one (or both) of the patches fail, you'll have the half baked results in debian-cd.new. Check thru the rejects and adjust debian-cd.patch.[etch|trunk] as needed. Test that your modified patch works with ./patch-debian-cd [etch|trunk]

  5. commit the debian-cd-revision, and debian-cd.patch.$branch files
  6. have a $beverage while it's building.
  7. test the cd

How to build more images

There are a few thing one must in order to add a new cd to the build system.

  1. make the temp file area.
    • debian-cd uses a area on disk, for tempfile area, building the filesystem that becomes the iso, and making the iso.

      you need to make the directory owned by builder as /skolelinux/administrator/temp_storage/builder/$suite. For example /skolelinux/administrator/temp_storage/builder/lenny-test-dvd/  You should also check that the area have the needed free space 1.5G for a cd and FIXME: GB for the dvd

buildd admins

Members of the builder group on administrator are:

famous last words

... and any technology distinguishable from magic is not sufficiently advanced!