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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]].
generated by cgit
ut. ("replacement also grafted"): New test. Ludovic Courtès 2016-09-06packages: Add 'package-superseded' and associated support....This provides a way to mark a package as superseded by another one. Upgrades replace superseded packages with their replacement. * guix/packages.scm (package-superseded, deprecated-package): New procedures. * gnu/packages.scm (%find-package): Check for 'package-superseded'. * guix/scripts/package.scm (transaction-upgrade-entry)[supersede]: New procedure. Call it when 'package-superseded' is true. * tests/guix-build.sh: Add test for a superseded package. * tests/packages.scm ("package-superseded") ("transaction-upgrade-entry, superseded package"): New tests. Ludovic Courtès 2016-09-06guix package: Build up the transaction incrementally....* guix/scripts/package.scm (upgraded-manifest-entry): Rename to... (transaction-upgrade-entry): ... this. Add 'transaction' parameter and return a transaction. (options->installable): Likewise. [to-upgrade]: Rename to... [upgraded]: ... this, and change to be a transaction. Return a transaction. (options->removable): Likewise. (process-actions): Adjust accordingly. * tests/packages.scm ("transaction-upgrade-entry, zero upgrades") ("transaction-upgrade-entry, one upgrade"): New tests. Ludovic Courtès 2016-09-01packages: Add 'package-input-rewriting'....* guix/packages.scm (package-input-rewriting): New procedure. * tests/packages.scm ("package-input-rewriting"): New test. * doc/guix.texi (Defining Packages): Document it. (Package Transformation Options): Add cross-reference. Ludovic Courtès 2016-07-28gnu: commencement: 'guile-final' is now "hidden"....This way, we no longer have this annoying warning: $ guix build guile -n guix build: warning: ambiguous package specification `guile' guix build: warning: choosing guile-2.0.11 from gnu/packages/guile.scm:128:2 * gnu/packages/commencement.scm (guile-final): Use 'hidden-package'. * tests/packages.scm ("fold-packages, hidden package"): New test. Ludovic Courtès 2016-07-28packages: Add 'hidden-package'....* guix/packages.scm (hidden-package, hidden-package?): New procedures. * gnu/packages.scm (fold-packages): Filter out 'hidden-package?'. * tests/packages.scm ("hidden-package"): New test. Ludovic Courtès 2016-07-12gnu: Remove unneeded 'imported-modules' fields for 'origin'....* gnu/packages/engineering.scm (fastcap)[source](modules, imported-modules): Remove. * gnu/packages/wm.scm (awesome)[source](imported-modules): Remove. * tests/packages.scm ("package-source-derivation, snippet"): Remove 'imported-modules' field. Ludovic Courtès 2016-06-20tests: Strengthen regexp in 'packages.scm'....* tests/packages.scm ("--search-paths with pattern"): Call 'regexp-quote' on the result of 'derivation->output-path'. Ludovic Courtès 2016-06-15packages: The 'source' can be any lowerable object....* guix/packages.scm (expand-input): Use 'struct?' instead of 'origin?' when matching SOURCE. (package-source-derivation): Use 'lower-object' instead of 'origin->derivation'. * tests/packages.scm ("package-source-derivation, local-file"): New test. * doc/guix.texi (package Reference): Update 'source' documentation accordingly. Ludovic Courtès