tests: Create a copy-on-write image instead of copying eagerly.

* gnu/tests/install.scm (qemu-command/writable-image): Invoke 'qemu-img
-o backing_file' instead of calling 'copy-file'.

Merge branch 'master' into python-build-system

tests: Add 'opensmtpd-service-type' test.

* gnu/tests/mail.scm: New file.
* gnu/local.mk (GNU_SYSTEM_MODULES): Add it.

Merge branch 'master' into python-build-system

tests: Remove 'GUIX_LOCPATH' hack that had been added for glibc@2.23.

* gnu/tests/base.scm (run-basic-test)[test]("locale"): Remove
'GUIX_LOCPATH' hack, which is no longer needed since
commit 9f58fe3d1c32e3f0ced065e286532a10cad1b5e3.

install: Enable "cryptodisk" handling in GRUB.

This allows 'grub-install' to do the right thing when / or /boot is a
LUKS-encrypted partition.

Fixes <http://bugs.gnu.org/21843>.

* gnu/build/install.scm (install-grub): Add 'setenv' to set
'GRUB_ENABLE_CRYPTODISK'.
(wait-for-screen-text): New test.
* gnu/tests/base.scm (run-basic-test): Add #:initialization parameter
and honor it.
* gnu/tests/install.scm (%encrypted-root-os)[kernel-arguments]: Remove.
(%encrypted-root-installation-script): Pass '--uuid' to 'cryptsetup
luksFormat'.  Remove 'sed' invocation.
(enter-luks-passphrase): New procedure.
(%test-encrypted-os)[value]: Pass #:initialization to 'run-basic-test'.

marionette: Add 'marionette-screen-text' using OCR.

* gnu/build/marionette.scm (marionette-screen-text): New procedure.
* gnu/tests/base.scm (run-basic-test)["screen text"]: New test.

tests: basic: Fix harmless thinko.

* gnu/tests/base.scm (run-basic-test)["login on tty1"]: Move the
file-waiting loop inside the 'marionette-eval' body.  Before that, we
were waiting for the file to appear on the host, which would never
happen, meaning that we were always waiting for 15 seconds.

Merge branch 'master' into core-updates

tests: Test installation with a RAID root partition.

* gnu/tests/install.scm (%raid-root-os, %raid-root-os-source)
(%raid-root-installation-script, %test-raid-root-os): New variables.

tests: Add #:memory-size parameter for the command to run the installed OS.

* gnu/tests/install.scm (qemu-command/writable-image): Add #:memory-size
parameter and honor it.

tests: Test installation with store on a separate partition.

This is a followup to 0f65f54ebd76324653fd5506a7dab42ee44d9255.

* gnu/tests/install.scm (%separate-store-os, %separate-store-os-source)
(%separate-store-installation-script, %test-separate-store-os): New
variables.

Merge branch 'master' into core-updates

tests: ssh: Add Dropbear test.

* gnu/tests/ssh.scm (run-ssh-test): Try authenticating with
'userauth-none!' when 'userauth-password!' fails.
(%test-dropbear): New variable.

tests: ssh: Generalize.

* gnu/tests/ssh.scm (%openssh-os): Rename to...
(%base-os): ... this.
[services]: Remove 'openssh-service-type' instance.
(os-with-service): New procedure.
(run-openssh-test): Rename to...
(run-ssh-test): ... this.  Add 'ssh-service' and 'pid-file' parameters.
Use 'os-with-service' to add SSH-SERVICE to %BASE-OS.  Honor PID-FILE.
(%test-openssh): Adjust accordingly.

tests: Add 'openssh-service-type' test.

* gnu/tests/ssh.scm: New file.
* gnu/local.mk (GNU_SYSTEM_MODULES): Add it.

Merge branch 'master' into core-updates

services: syslog: Use syslog-configuration.

* gnu/services/base.scm (<syslog-configuration>): New variable.
  (syslog-service-type): Use <syslog-configuration>.
  (syslog-service): Use <syslog-configuration>.
* gnu/tests/base.scm (%avahi-os): Use <syslog-configuration>.
* doc/guix.texi (syslog-configuration-type): Add @deftp.
  (syslog-service): Update @deffn.

Merge branch 'master' into core-updates

services: herd: Provide <live-service> objects.

* gnu/services/herd.scm (<live-service>): New record type.
(current-services): Change to return a single value: #f or a list of
<live-service>.
* guix/scripts/system.scm (call-with-service-upgrade-info): Adjust
accordingly.
* gnu/tests/base.scm (run-basic-test)["shepherd services"]: Adjust
accordingly.