Suggested by Ludovic Courtès <ludo@gnu.org>.

* emacs/guix-build-log.el (guix-build-log-phase-end-regexp): New
  variable.
  (guix-build-log-phase-start, guix-build-log-phase-end,
  guix-build-log-phase-hide, guix-build-log-phase-show,
  guix-build-log-phase-hidden-p, guix-build-log-phase-toggle-function,
  guix-build-log-phase-toggle, guix-build-log-phase-toggle-all): New functions.
  (guix-build-log-mode-map): Add 'TAB'/'S-TAB' key bindings.
* doc/emacs.texi (Emacs Build Log): Document them.

* gnu/packages/scheme.scm (scmutils): New variable.

* gnu/packages/ruby.scm (ruby-bio-logger): New variable.

* guix/build/download.scm
  (seconds->string): Conditionally include hours in timestamp.

Signed-off-by: Ludovic Courtès <ludo@gnu.org>

* gnu/packages/guile.scm (guile-next): New variable.
* gnu/packages/guile.scm (guile-for-guile-emacs):
  Adjust to inherit from guile-next rather than guile-2.0

Signed-off-by: Ludovic Courtès <ludo@gnu.org>

* gnu/packages/emacs.scm (typo): New variable.

* gnu/packages/emacs.scm (butler): New variable.

* gnu/packages/emacs.scm (emacs-deferred): New variable.

* gnu/packages/ruby.scm (ruby-cucumber-core): New variable.

* guix/build/download.scm
  (string-pad-middle, store-url-abbreviation, store-path-abbreviation):
  New procedures.
  (progress-proc): Add #:abbreviation parameter and use it.  Generate a
  better indeterminate progress string.
* guix/scripts/substitute.scm (assert-valid-narinfo): Add newlines to output.
  (process-substitution): Use byte-count->string and store-path-abbreviation.

Co-authored-by: Ludovic Courtès <ludo@gnu.org>

* gnu/packages/bioinformatics.scm (mafft): New variable.

* gnu/packages/password-utils.scm (keepassx): New variable.

* gnu/packages/openstack.scm (python-requests-mock,
  python2-requests-mock): New variables.

* gnu/packages/python.scm (python-webob, python2-webob): New variables.

* gnu/packages/openstack.scm (python-oslo.context,
  python2-oslo.context): New variables.

* gnu/packages/openstack.scm (python-oslo.serialization,
  python2-oslo.serialization): New variables.

* gnu/packages/compression.scm (sfarklib): Update to 2.24.

* gnu/packages/ruby.scm (ruby-log4r): New variable.

* gnu/packages/statistics.scm (r-dbi): New variable.

* gnu/packages/abiword.scm: Add comment above 'description'.

* doc/guix.texi (Synopses and Descriptions): New node.
* doc/contributing.texi (Submitting Patches): Add item that
  cross-references it.

* doc/guix.texi: Replace outdated @author list with just "The GNU Guix
  Developers".

* gnu/packages/statistics.scm (r-lazyeval): New variable.

* gnu/packages/statistics.scm (r-assertthat): New variable.

* gnu/packages/ruby.scm (ruby-gherkin3): New variable.

* guix/script/lint.scm (check-description-style): Check for invalid
  Texinfo markup.
* tests/lint.scm: Test it.

* emacs/guix-command.el (guix-run-view-build-log): New function.
  (guix-command-additional-execute-arguments,
  guix-command-special-executors): Add entries for "View build log"
  action.
* emacs/guix-utils.el (guix-find-file-or-url): New function.

* emacs/guix-build-log.el: New file.
* emacs.am (ELFILES): Add it.
* doc/emacs.texi (Emacs Build Log): Document it.  New node.
  (Emacs Interface): Add it.
* doc/guix.texi (Top): Likewise.

* emacs/guix-main.scm (output+error): New procedure.
  (guix-command-output): Use it.
* emacs/guix-base.el (guix-command-output): Display error output in the
  minibuffer.

* emacs/guix.el (guix-faces): New custom group.
* emacs/guix-base.el (guix-operation-option-key): Use it.
  (guix-define-buffer-type): Generate faces group.
* emacs/guix-info.el: Adjust faces to use new groups.
  (guix-info-faces): New custom group.
* emacs/guix-list.el: Likewise
  (guix-list-faces): New custom group.

* guix/scripts/lint.scm (check-source-file-name): New procedure.
  (%checkers): Add 'source-file-name' checker.
* tests/lint.scm ("source-file-name", "source-file-name: v prefix")
  ("source-file-name: valid", "source-file-name: bad checkout")
  ("source-file-name: good checkout"): New tests.
* doc/guix.texi (Invoking guix lint): Mention file name check.

* guix/scripts/graph.scm (uri->file-name, node-full-name): Move origin file
  name logic to...
* guix/packages.scm (origin-actual-file-name): ...here.
* tests/packages.scm ("origin-actual-file-name")
  ("origin-actual-file-name, file-name"): New tests.

* guix/build/download.scm (nearest-exact-integer): New procedure.
  (seconds->string, byte-count->string): Use it.

Fixes <http://bugs.gnu.org/21451>.
Reported by Steve Sprang <steve.sprang@gmail.com>.

* guix/scripts/system.scm (guix-system)[option-arguments]: Error out
  when ACTION is #f.

Apply the recommended formatting rules from '.dir-locals.el' to the
examples in the manual in order to fulfill it's purpose of being a
reference.

* doc/package-hello.scm: Indent it.
* doc/guix.texi (Defining Packages, Version Numbers): Likewise.
* gnu/packages/base.scm (hello): Be consistent with the manual.

* gnu/packages/bioinformatics.scm (bio-locus): New variable.

This reverts commit b429c4fb.

* gnu/packages/bioinformatics.scm (bio-locus): New variable.

* gnu/system/linux-container.scm: New file.
* gnu-system.am (GNU_SYSTEM_MODULES): Add it.
* gnu/system.scm: Export 'operating-system-etc-directory',
  'operating-system-boot-script', 'operating-system-locale-directory', and
  'file-union'.
  (operating-system-boot-script): Add #:container? keyword argument.
  (operating-system-activation-script): Add #:container?  keyword argument.
  Don't call 'activate-firmware' or 'activate-ptrace-attach' when activating a
  container.

Previously, the Ruby build system only knew how to work with gem archives,
which made it difficult to build unreleased gems from a Git repository or
released gems in tarball form.

* gnu/build/ruby-build-system.scm (gnu:unpack, gem-archive?): New procedures.
  (unpack): Use GNU build system unpack phase for non-gem sources.
  (build): Rebuild the gemspec iff the source is a gem archive.
* guix.texi ("ruby-build-system"): Mention that tarballs and directories are
  acceptable.