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-*- mode: org; coding: utf-8; -*-

#+TITLE: Hacking GNU Guix and Its Incredible Distro

Copyright © 2012, 2013, 2014, 2016, 2017 Ludovic Courtès <ludo@gnu.org>
Copyright © 2015, 2017 Mathieu Lirzin <mthl@gnu.org>
Copyright © 2017 Leo Famulari <leo@famulari.name>

  Copying and distribution of this file, with or without modification,
  are permitted in any medium without royalty provided the copyright
  notice and this notice are preserved.

* Contributing

See the manual for useful hacking informations, either by running

  info -f doc/guix.info "Contributing"

or by checking the [[http://www.gnu.org/software/guix/manual/guix.html#Contributing][web copy of the manual]].

* Commit Access

For frequent contributors, having write access to the repository is
convenient.  When you deem it necessary, feel free to ask for it on the
mailing list.  When you get commit access, please make sure to follow the
policy below (discussions of the policy can take place on guix-devel@gnu.org.)

Non-trivial patches should always be posted to guix-patches@gnu.org (trivial
patches include fixing typos, etc.)  This mailing list fills the
patch-tracking database at [[https://bugs.gnu.org/guix-patches]]; see
"Contributing" in the manual for details.

For patches that just add a new package, and a simple one, it’s OK to commit,
if you’re confident (which means you successfully built it in a chroot setup,
and have done a reasonable copyright and license auditing.)  Likewise for
package upgrades, except upgrades that trigger a lot of rebuilds (for example,
upgrading GnuTLS or GLib.)  We have a mailing list for commit notifications
(guix-commits@gnu.org), so people can notice.  Before pushing your changes,
make sure to run ‘git pull --rebase’.

All commits that are pushed to the central repository on Savannah must be
signed with an OpenPGP key, and the public key should be uploaded to your user
account on Savannah and to public key servers, such as ‘pgp.mit.edu’.  To
configure Git to automatically sign commits, run:

  git config commit.gpgsign true
  git config user.signingkey CABBA6EA1DC0FF33

You can prevent yourself from accidentally pushing unsigned commits to
Savannah by using the pre-push Git hook called located at ‘etc/git/pre-push’:

  cp etc/git/pre-push .git/hooks/pre-push

When pushing a commit on behalf of somebody else, please add a Signed-off-by
line at the end of the commit log message (e.g. with ‘git am --signoff’).
This improves tracking of who did what.

For anything else, please post to guix-patches@gnu.org and leave time for a
review, without committing anything.  If you didn’t receive any reply
after two weeks, and if you’re confident, it’s OK to commit.

That last part is subject to being adjusted, allowing individuals to commit
directly on non-controversial changes on parts they’re familiar with.
l'>...Fixes <http://bugs.gnu.org/22633>. * gnu/build/vm.scm (load-in-linux-vm): Only pass "-enable-kvm" flag to qemu if "/dev/kvm" is present. * gnu/system/vm.scm (common-kvm-options): Same as above. Christopher Allan Webber 2016-02-08file-systems: Spawn a Bournish REPL upon fsck failure....Fixes <http://bugs.gnu.org/22588>. Reported by Mark H Weaver <mhw@netris.org>. * gnu/build/file-systems.scm (check-file-system): Pass %BOURNISH-LANGUAGE as the argument to 'start-repl'. * gnu/services.scm (activation-script): Add (guix build bournish). * gnu/services/base.scm (file-system-shepherd-service)[imported-modules]: Likewise. * gnu/system/linux-container.scm (container-script): Likewise. * gnu/system/vm.scm (expression->derivation-in-linux-vm): Likewise. Ludovic Courtès 2016-01-01system: Allow the root file system to have a UUID....This is a followup to ab64483. * gnu/system.scm (mapped-device-user): Check whether the title of FS is 'device before calling 'string=?'. * gnu/system/vm.scm (virtualized-operating-system)[user-file-systems]: Likewise. Ludovic Courtès 2015-11-21gnu: Add qemu-minimal....* gnu/packages/qemu.scm (qemu): Exchange with former QEMU-HEADLESS. (qemu-headless): Rename to... (qemu-minimal): ... this. New variable. Pass --target-list. * gnu/packages/debug.scm (qemu-2.3.0): Inherit from QEMU-MINIMAL. * gnu/packages/grub.scm (qemu-for-tests): Likewise. * gnu/system/vm.scm (expression->derivation-in-linux-vm, qemu-image): Update to name change. Ludovic Courtès 2015-11-03system: Rename (gnu system linux) to (gnu system pam)....* gnu/system/linux.scm: Rename to... * gnu/system/pam.scm: ... this. * gnu-system.am (GNU_SYSTEM_MODULES): Adjust accordingly. * gnu.scm, gnu/services/base.scm, gnu/services/desktop.scm, gnu/services/networking.scm, gnu/services/ssh.scm, gnu/services/xorg.scm, gnu/system.scm, gnu/system/vm.scm: Likewise. Ludovic Courtès 2015-07-26vm: Make the list of partitions to build a parameter....* gnu/build/vm.scm (<partition>): New record type. (fold2): New procedure. (initialize-partition-table): Remove #:bootable? and 'partition-size' parameters. Add 'partitions' parameter. Invoke 'parted' with '--script'. (initialize-root-partition): Remove. (initialize-partition, root-partition-initializer): New procedures. (initialize-hard-disk): Remove #:system-directory, #:disk-image-size, #:file-system-type, #:file-system-label, #:closures, #:copy-closures?, #:bootable?, and #:register-closures? parameters. Add #:partitions. Rewrite to use 'initialize-partition' for each item of PARTITIONS. * gnu/system/vm.scm (expression->derivation-in-linux-vm): Add (guix records) to #:modules default value. (qemu-image): Adjust accordingly. Ludovic Courtès 2015-07-24vm: Use the 'umount' procedure instead of util-linux's 'umount' command....* gnu/build/vm.scm (initialize-root-partition, initialize-hard-disk): Use the 'umount' procedure instead of invoking the 'umount' command. * gnu/system/vm.scm (qemu-image): Remove UTIL-LINUX from INPUTS. Ludovic Courtès