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

#+TITLE: Hacking GNU Guix and Its Incredible Distro

Copyright © 2012, 2013, 2014, 2016, 2017, 2019 Ludovic Courtès <ludo@gnu.org>
Copyright © 2015, 2017 Mathieu Lirzin <mthl@gnu.org>
Copyright © 2017 Leo Famulari <leo@famulari.name>
Copyright © 2017 Arun Isaac <arunisaac@systemreboot.net>

  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 information, either by running

  info -f doc/guix.info "Contributing"

or by checking the [[https://guix.gnu.org/manual/devel/en/html_node/Contributing.html][web copy of the manual]].
tests/guix-pack-relocatable.sh, tests/guix-pack.sh, tests/guix-package-aliases.sh, tests/guix-package-net.sh, tests/guix-package.sh: Use the shell '!' keyword to negate command exit status in place of 'if ...; then false; else true; fi' Eric Bavier 2019-04-10guix gc: Add '--list-roots'....* guix/scripts/gc.scm (show-help, %options): Add '--list-roots'. (guix-gc)[list-roots]: New procedure. Handle '--list-roots'. * tests/guix-gc.sh: Test it. * doc/guix.texi (Invoking guix gc): Document it. Ludovic Courtès