services: etc: Add '/etc/ttys' symlink for the Hurd.

Reported by Vitaliy Shatrov <D0dyBo0D0dyBo0@protonmail.com> via IRC.

* gnu/system.scm (operating-system-etc-service): For the Hurd, add '/etc/ttys'
symlink.  This fixes terminal behavior in the console by setting TERM=hurd.

installer: final: Dump "guix system init" command output when testing.

When debugging the installation tests, it can be very handy to be able to read
"guix system init" command output.

* gnu/installer/final.scm (install-system): Dump installation command output
to the console when running the installation tests.

installer: final: Remove left-over pk call.

* gnu/installer/final.scm (kill-cow-users): Remove pk call.

gnu: guix: Update to 141b5c1620.

* gnu/packages/package-management.scm (guix): Update to 1.1.0-1.141b5c1620.

gnu: grub: Support graphical gfxterm on all systems.

* gnu/bootloaders/grub.scm (eye-candy): Use gfxterm depending only on
(bootloader-configuration (terminal-outputs …)), which defaults to '(gfxterm).
This makes the system argument obsolete.

Signed-off-by: Mathieu Othacehe <othacehe@gnu.org>

gnu: emacs-helm: Update to 3.6.2.

* gnu/packages/emacs-xyz.scm (emacs-helm): Update to 3.6.2.

gnu: apache-arrow: Update to 0.17.1.

* gnu/packages/databases.scm (apache-arrow): Update to 0.17.1.
* gnu/packages/databases.scm (python-pyarrow): Update to 0.17.1.
* gnu/packages/serialization.scm (python-feather-format): Update to 0.4.1.

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

gnu: Add apache-thrift.

* gnu/packages/rpc.scm (apache-thrift): New variable.

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

gnu: icedove: Update to 68.9.0.

* gnu/packages/gnuzilla.scm (%icedove-build-id): Update.
(icedove): Update version and corresponding hg changeset.

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

store: Use buffered I/O for all protocol writes

* guix/store.scm (run-gc) Use buffered output port.
(export-path) Same.
(add-file-tree-to-store) Same.
(set-build-options): Same. Add explicit flush.

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

activation: Fix function call for system activation

* gnu/build/activation.scm (boot-time-system):
Evaluate the linux-command-line thunk for linux systems to boot

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

Revert "installer: utils: Dump command output to syslog when testing."

This reverts commit f73ed5579157a074093bae7a2ffb59a85412be0d. This was pushed
by error, as this is not reviewed yet.

installer: utils: Dump command output to syslog when testing.

When debugging the installation tests, it can be very handy to be able to read
"run-command" output, for instance when executing "guix system init".

Introduce a new "invoke-with-log" procedure that is able to log a command
standard and error outputs to the syslog. Use it, only when running the
installation tests, to dump "run-command" output.

* gnu/installer/utils.scm (open-pipe-with-stderr, invoke-with-log): New
procedures,
(invoke-log-port): new variable,
(run-command): move to the end of the file and use invoke-with-log when
running the installation tests.

build: image: Do not call make-essential-device-nodes by default.

Calling "mknod" without root permissions fails. Plus those device nodes do not
appear to be needed to boot.

* gnu/build/image.scm (initialize-root-partition): Do not use
make-essential-device-nodes as default make-device-nodes procedure.

doc: Add note to 'udisks-service'.

* doc/guix.texi (Desktop Services): Specify how to add file-systems
utilities to 'udisks-service'.

system: vm: Add missing imported module.

* gnu/system/vm.scm (qemu-image): Import missing (gnu build hurd-boot) module.

Signed-off-by: Maxim Cournoyer <maxim.cournoyer@gmail.com>

system: Fix typo that breaks grub.cfg generation.

* gnu/system.scm (boot-parameters->menu-entry): Delete quote to evalutate and
get kernel boot parameters.

Signed-off-by: Maxim Cournoyer <maxim.cournoyer@gmail.com>

git-authenticate: 'commit-authorized-keys' properly handles orphan commits.

Previously it would trigger a wrong-number-of-arguments error for
'lset-intersection'.

* guix/git-authenticate.scm (commit-authorized-keys): Add case for when
'commit-parents' returns the empty list.

git: 'commit-difference' really excludes the ancestors of #:excluded.

* guix/git.scm (commit-difference): Initialize VISITED to the closure of
OLD and EXCLUDED, as written in the docstring.
* tests/git.scm ("commit-difference, excluded commits"): Adjust
accordingly.

maint: 'make authenticate' starts from v1.0.0.

* Makefile.am (commit_v1_0_1): Remove.
(commit_v1_0_0): New variable.
(authenticate): Use it.