gnu: grub: Run tests sequentially.

Reported by Maxim Cournoyer <maxim.cournoyer@gmail.com>
at <http://bugs.gnu.org/26936>.

* gnu/packages/bootloaders.scm (grub)[arguments]: Add #:parallel-tests?.

gnu: sudo: Update to 1.8.20p2.

* gnu/packages/admin.scm (sudo): Update to 1.8.20p2.

gnu: re2: Update to 2017-06-01.

* gnu/packages/regex.scm (re2): Update to 2017-06-01.

.mailmap: Add another alias for ng0.

Signed-off-by: Marius Bakke <mbakke@fastmail.com>

gnu: neomutt: Update to 20170602.

* gnu/packages/mail.scm (neomutt): Update to 20170602.

Signed-off-by: Arun Isaac <arunisaac@systemreboot.net>

substitute: Do not display the installed size.

* guix/scripts/substitute.scm (process-substitution): Do not show the
installed size in the "Downloading" message.

ui: 'show-what-to-build' warns when we don't have enough disk space.

* guix/ui.scm (check-available-space): New procedure.
(show-what-to-build): Compute 'installed-size' and call
'check-available-space'.

syscalls: Provide 'free-disk-space'.

* guix/build/syscalls.scm (free-disk-space): New procedure.
* guix/scripts/gc.scm (guix-gc)[ensure-free-space]: Use it instead of
'statfs'.

ui: 'show-what-to-build' displays how much will be downloaded.

* guix/ui.scm (show-what-to-build)[download-size]
[display-download-size?]: New variables.
Add cases for when DISPLAY-DOWNLOAD-SIZE? is true.

derivations: 'derivation-prerequisites-to-build' returns <substitutable>.

* guix/derivations.scm (derivation-prerequisites-to-build): Rename
 #:substitutable? to #:substitutable-info.
[derivation-substitutable?]: Rename to...
[derivation-substitutable-info]: ... this.  Return a list of <substitutable>.
Second return value is now a list of <substitutable> instead of a list
of strings.
* guix/ui.scm (show-what-to-build)[substitutable?]: Rename to...
[substitutable-info]: ... this.
Adjust to new 'derivation-prerequisites-to-build' return value type.
* tests/derivations.scm ("derivation-prerequisites-to-build and
substitutes"): Adjust.
("derivation-prerequisites-to-build and substitutes, local build"):
Likewise.

derivations: 'substitution-oracle' returns a <substitutable>.

* guix/derivations.scm (substitution-oracle): Use
'substitution-path-info' instead of 'substitution-paths'.  Turn SUBST
into a vhash from path to <substitutable>.  Change the returned
procedure to provide a <substitutable> instead of a Boolean.
* tests/derivations.scm ("substitution-oracle and #:substitute? #f"):
Mock 'substitutable-path-info' instead of 'substitutable-paths'.

gnu: Move vtk to image-processing.scm.

* gnu/packages/image-processing.scm (vtk): New variable.
* gnu/packages/vtk.scm: Delete file.
* gnu/local.mk (GNU_SYSTEM_MODULES): Remove it.

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

tests: Remove 't-profile-alt-*-link' files.

Reported by myglc2 <myglc2@gmail.com>
at <https://debbugs.gnu.org/cgi/bugreport.cgi?bug=27137#11>.

* tests/guix-package-net.sh: In the trap, remove $profile_alt-[0-9]*.

gnu: mutt: Update to 1.8.3.

* gnu/packages/mail.scm (mutt): Update to 1.8.3.

gnu: Add archivemount

* gnu/packages/linux.scm (archivemount): New variable.

gnu: Update retroarch to 1.6.0.

* gnu/packages/games.scm (retroarch): Update to 1.6.0.

gnu: Add kaiju.

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

gnu: python-gpg: Use explicit version 1.8.0 instead of GPGME's.

GPGME defines version 1.9.0, which isn't yet available for python-gnupg, whose
latest version is 1.8.0, so we use that explicitly instead.

Fixes <https://bugs.gnu.org/26610>.

* gnu/packages/gnupg.scm (python-gpg, python2-gpg): Use explicit version 1.8.0
instead of GPGME's version.

Signed-off-by: Leo Famulari <leo@famulari.name>

gnu: Add uglify-js.

* gnu/packages/lisp.scm (uglify-js): New variable.

gnu: Add sbcl-cl-uglify-js.

* gnu/packages/lisp.scm (sbcl-cl-uglify-js): New variable.