Merge branch 'master' into core-updates

Move <boot-parameters> to (gnu system).

* guix/scripts/system.scm (previous-grub-entries)
  (display-system-generation): Use accessors instead of matching
  <boot-parameters>.
  (boot-parameters, boot-parameters?, boot-parameters-label)
  (boot-parameters-root-device, boot-parameters-kernel)
  (boot-parameters-kernel-arguments, read-boot-parameters): Move to...
* gnu/system.scm: ... here. Export them.

Merge branch 'master' into core-updates

services: Move /tmp cleanup to a separate service.

* gnu/services.scm (compute-boot-script): Remove /tmp and /var/run
deletion code from here.
(cleanup-gexp): New procedure with /tmp and /var/run deletion code
formerly in 'compute-boot-script'.
(cleanup-service-type): New variable.
* gnu/system.scm (essential-services): Add an instance of
CLEANUP-SERVICE-TYPE.

Merge branch 'master' into core-updates

system: Allow the root file system to be named by UUID.

* gnu/build/file-systems.scm (canonicalize-device-spec)[canonical-title]:
Use 'string->uuid' to check whether SPEC is a UUID.
When SPEC is a string and CANONICAL-TITLE is 'uuid, call 'string->uuid'.
* gnu/system.scm (operating-system-grub.cfg): Add 'root-device'
variable and use it for the "--root=" argument.

system: Allow the root file system to have a UUID.

This is a followup to ab64483.

* gnu/system.scm (mapped-device-user): Check whether the title of FS is
'device before calling 'string=?'.
* gnu/system/vm.scm (virtualized-operating-system)[user-file-systems]:
Likewise.

file-systems: The 'device' field can be a UUID (bytevector).

Previously a wrong-type-arg error would be raised when a file system
with a UUID (bytevector) field was encountered.

* gnu/system.scm (other-file-system-services)[device-mappings]: Check
whether FS's device is a string.

services: Add 'fstab-service-type'.

* gnu/services/base.scm (file-system->fstab-entry)
(file-systems->fstab): New procedures.
(fstab-service-type): New variable.
* gnu/services/base.scm (file-system-dmd-service): New procedure, taken
from...
(file-system-service-type): ... here.
* gnu/system.scm (essential-services): Add FSTAB-SERVICE-TYPE instance.

Merge branch 'master' into core-updates

system: Add /etc/environment.

* gnu/system.scm: (operating-system-environment-variables): New procedure.
Adapted and moved environment variables from /etc/profile.
(operating-system-etc-service): Adjust accordingly.
(essential-services): Add an instance of SESSION-ENVIRONMENT-SERVICE-TYPE.

system: Populate /etc/shells from ACCOUNT-SERVICE-TYPE.

* gnu/system.scm (user-shells): Remove.
  (operating-system-etc-service): Remove "shells" entry.
  (shells-file): Move to...
* gnu/system/shadow.scm (shells-file): ... here.  New procedure.
  (etc-skel): Rename to...
  (etc-files): ... this.  Add "shells" entry.
  (account-service-type): Adjust accordingly.

system: Rename (gnu system linux) to (gnu system pam).

* gnu/system/linux.scm: Rename to...
* gnu/system/pam.scm: ... this.
* gnu-system.am (GNU_SYSTEM_MODULES): Adjust accordingly.
* gnu.scm, gnu/services/base.scm, gnu/services/desktop.scm,
  gnu/services/networking.scm, gnu/services/ssh.scm,
  gnu/services/xorg.scm, gnu/system.scm, gnu/system/vm.scm: Likewise.

services: Add 'profile-service-type'.

* gnu/services.scm (packages->profile-entry): New procedure.
  (profile-service-type): New variable.
* gnu/system.scm (operating-system-directory-base-entries): Remove
  the "profile" entry.
  (essential-services): Add a PROFILE-SERVICE-TYPE instance.
  (operating-system-profile): Rewrite in terms of 'fold-services'.
* doc/guix.texi (Service Reference): Add 'profile-service-type'.
* doc/images/service-graph.dot: Likewise.

services: Add 'system-service-type'.

* gnu/services.scm (system-derivation): New procedure.
  (system-service-type): New variable.
  (boot-script-entry): New procedure.
  (boot-service-type): Extend SYSTEM-SERVICE-TYPE.
  (etc-entry): New procedure.
  (etc-service-type): Extend SYSTEM-SERVICE-TYPE.
  (fold-services): Change default #:target-type to SYSTEM-SERVICE-TYPE.
* gnu/system.scm (operating-system-directory-base-entries): New procedure.
  (essential-services): Use it.  Add an instance of
  SYSTEM-SERVICE-TYPE.
  (operating-system-boot-script): Pass #:target-type to 'fold-services'.
  (operating-system-derivation): Rewrite in terms of 'fold-services'.
* gnu/system/linux-container.scm (system-container): Remove.
  (container-script): Use 'operating-system-derivation'.
* guix/scripts/system.scm (export-extension-graph): Replace
  BOOT-SERVICE-TYPE by SYSTEM-SERVICE-TYPE.
* doc/images/service-graph.dot: Add 'system' node and edges.
* doc/guix.texi (Service Composition): Mention SYSTEM-SERVICE-TYPE.
  (Service Reference): Document it.  Update 'fold-services'
  documentation.

system: Add 'locale-libcs' field.

* gnu/system/locale.scm (localedef-command)[maybe-version-directory]:
  New procedure.
  Use it.
  (locale-directory): Rename to...
  (single-locale-directory): ... this.  Check the version of LIBC to
  determine whether to create a "X.Y" sub-directory or to make it a
  symlink to ".".  Add the version number in the derivation name.
  (locale-directory): New procedure.
  (%default-locale-libcs): New variable.
* gnu/system.scm (<operating-system>)[locale-libcs]: New field.
  (operating-system-locale-directory): Pass it to 'locale-directory'.
* doc/guix.texi (operating-system Reference): Document 'locale-libcs'.
  (Locales)[Locale Data Compatibility Considerations]: New section.

Merge branch 'master' into dbus-update

services: Add 'linux-bare-metal-service-type'.

* gnu/services.scm (modprobe-wrapper): Remove.
  (activation-script): Do not use it.  Remove calls to
  'activate-modprobe' and 'activate-ptrace-attach' in gexp.
  (%modprobe-wrapper, %linux-kernel-activation,
  linux-bare-metal-service-type, %linux-bare-metal-service): New
  variables.
* gnu/system.scm (essential-services): Add %LINUX-BARE-METAL-SERVICE to
  the list, unless CONTAINER? is true.

system: File systems depend on their corresponding device mappings.

Fixes a regression introduced in commit 0adfe95.

* gnu/system.scm (other-file-system-services)[requirements]: Remove.
  [add-dependencies]: New procedure.
  Use it.
* gnu/system/file-systems.scm (<file-system>)[dependencies]: Update
  comment.
* gnu/services/base.scm (mapped-device->dmd-service-name,
  dependency->dmd-service-name): New procedures.
  (file-system-service-type): Use it.

Merge branch 'master' into dbus-update