* guix/scripts/graph.scm (ensure-store-items): New procedure.
(%reference-node-type)[convert]: Use it.
(non-derivation-referrers): New procedure.
(%referrer-node-type): New variable.
(%node-types): Add it.
* tests/graph.scm ("referrer DAG"): New test.
* doc/guix.texi (Invoking guix graph): Document it.

* doc/guix.texi (Python Modules): New sub-subsection "Specifying
Dependencies".

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

* gnu/services/nfs.scm (pipefs-service-type): New variable,
(gss-service-type): New variable, (idmap-service-type) New variable.

* doc/guix.texi (Network File System): New node.

* guix/build-system/asdf.scm: New file.
* guix/build/asdf-build-system.scm: New file.
* guix/build/lisp-utils.scm: New file.
* Makefile.am (MODULES): Add them.
* doc/guix.texi (Build Systems): Document 'asdf-build-system'.

Signed-off-by: 宋文武 <iyzsong@gmail.com>

* doc/guix.texi (package Reference): Remove GHC from the list of
languages for which library run-time dependencies must be propagated.

* guix/build/graft.scm (replace-store-references): REPLACEMENT is now
the full string, not just the hash.
(rewrite-directory)[hash-mapping](valid-suffix?): Remove.
(hash+suffix): Rename to...
(hash+rest): ... this.  Change to return the whole string as the second
element of the list.  Adjust 'match-lambda' expression accordingly;
check whether the string length of the origin and replacement match.
* tests/grafts.scm ("graft-derivation, grafted item uses a different
name"): New test.
* doc/guix.texi (Security Updates): Update sentence on the name/version
restriction.

* gnu/services/ssh.scm (<openssh-configuration>): Add default values.
[pubkey-authentication?]: Rename to...
[public-key-authentication?]: ... this.
(openssh-service): Remove.
* doc/guix.texi (Networking Services): Adjust accordingly.

* gnu/services/admin.scm: New file.
* gnu/local.mk (GNU_SYSTEM_MODULES): Add it.
* doc/guix.texi (Log Rotation): New node.

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

* gnu/packages/ssh.scm (openssh)[arguments]: Set sysconfdir to /etc/ssh.
* gnu/services/ssh.scm (<openssh-configuration>): New record type.
(%openssh-accounts): New variable.
(openssh-activation, openssh-config-file, openssh-shepherd-service)
(openssh-service): New procedures.
(openssh-service-type): New variable.
* doc/guix.texi (Networking Services): Document 'openssh-services'.

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

* doc/guix.texi (OPENPGP-SIGNING-KEY-ID): Use fingerprint instead of
long key ID.

* gnu/services/mail.scm (dovecot-configuration): Change default for
  postmaster-address, as dovecot is now requiring a non-empty value and
  will fail to start up otherwise.
* doc/guix.texi (Mail Services): Update.

* gnu/services.scm (simple-service): New procedure.
* doc/guix.texi (Service Reference): Document it.

* doc/guix.texi: "filesystem" -> "file system"
* gnu/packages/admin.scm: "filesystem" -> "file system"
* gnu/packages/cdrom.scm: "filesystem" -> "file system"
* gnu/packages/compression.scm: "filesystem" -> "file system"
* gnu/packages/disk.scm: "filesystem" -> "file system"
* gnu/packages/gnome.scm: "filesystem" -> "file system"
* gnu/packages/irc.scm: "filesystem" -> "file system"
* gnu/packages/linux.scm: "filesystem" -> "file system"
* gnu/packages/mail.scm: "filesystem" -> "file system"
* gnu/packages/mpd.scm: "filesystem" -> "file system"
* gnu/packages/ocaml.scm: "filesystem" -> "file system"
* gnu/packages/perl.scm: "filesystem" -> "file system"
* gnu/packages/python.scm: "filesystem" -> "file system"
* gnu/packages/search.scm: "filesystem" -> "file system"
* gnu/packages/tls.scm: "filesystem" -> "file system"
* gnu/services/mail.scm: "filesystem" -> "file system"

* doc/guix.texi (G-Expressions): In cross-compilation example, pass a
GNU triplet to #:target.

* doc/guix.texi (Services): "Various" -> "Miscellaneous"

* gnu/services/base.scm (<kmscon-configuration>, kmscon-service-type):
  New variables.
* doc/guix.texi (@deffn kmscon-service-type, @deftp
  kmscon-configuration): Add documentation.

* gnu/services/base.scm (%default-motd, <login-configuration>,
  login-pam-service, login-serivce-type, login-service): New variables.
  (<mingetty-configuration>, mingetty-shepherd-service,
  mingetty-serivce-type): Remove motd. Remove allow-empty-passwords?.
  Remove mingetty-pam-service.
  (%base-services): Add login-service. Remove motd.

Fixes <http://bugs.gnu.org/20067>.
Reported by Tomáš Čech <sleep_walker@suse.cz>.

* gnu/system.scm (system-linux-image-file-name)
(operating-system-kernel-file): New procedures.
(operating-system-grub.cfg): Use 'operating-system-kernel-file' for the
'kernel' field of 'menu-entry'.
(operating-system-parameters-file): Likewise for the 'kernel' entry.
(read-boot-parameters): Adjust 'kernel' field so that it contains the
absolute file name of the image.
* gnu/system/grub.scm (grub-configuration-file)[linux-image-name]:
Remove.
[entry->gexp]: Assume LINUX is the absolute file name of the kernel
image.
* doc/guix.texi (GRUB Configuration): Add an example, and adjust
'kernel' field documentation accordingly.

* guix/gexp.scm (<file-append>): New record type.
(file-append): New procedure.
(file-append-compiler): New gexp compiler.
* tests/gexp.scm ("file-append", "file-append, output")
("file-append, nested", "gexp->file + file-append"): New tests.
* doc/guix.texi (G-Expressions): Use it in 'nscd' and 'list-files'
examples.  Document 'file-append'.

* doc/guix.texi (Limitations): Update package count.

* gnu/services/nfs.scm: New file.
* gnu/local.mk (GNU_SYSTEM_MODULES): Add it.

* guix/scripts/hash.scm (show-help): Add help text for --exclude-vcs option.
(%options): Add --exclude-vcs option.
(guix-hash): Handle exclude-vcs option.
* doc/guix.texi ("Invoking guix hash"): Update doc.
* tests/guix-hash.sh: Add test.

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

* gnu/services/sddm.scm: New file.
* gnu/local.mk (GNU_SYSTEM_MODULES): Add it.
* doc/guix.texi (@deftp, @deffn): Add documentation.

* 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.

* guix/modules.scm, tests/modules.scm: New files.
* Makefile.am (MODULES, SCM_TESTS): Add them.
* doc/guix.texi (G-Expressions): Add an example of
'source-module-closure'.

* doc/guix.texi: Fix typo.
* doc/emacs.texi: Fix multiple typos.

* guix/packages.scm (package-input-rewriting): New procedure.
* tests/packages.scm ("package-input-rewriting"): New test.
* doc/guix.texi (Defining Packages): Document it.
(Package Transformation Options): Add cross-reference.

Reported by Vincent Legoll <vincent.legoll@gmail.com>.

* doc/guix.texi (Networking Services): Change #:name-service to
  #:servers in 'ntp-service' documentation.

* doc/guix.texi (Invoking guix package): Use '@' syntax in --show
example.

* gnu/system/shadow.scm (<user-account>)[create-home-directory?]: New
field.
(user-account->gexp): Serialize it.
* gnu/build/activation.scm (activate-users+groups)[activate-user]:
Update 'match-lambda' pattern accordingly.  Pass #:create-home? to
'ensure-user'.
(add-user, modify-user, ensure-user): Add #:create-home? parameter and
honor it.
* doc/guix.texi (User Accounts): Document it.

* gnu/services/base.scm (hydra-key-authorization): Add 'key' parameter
and honor it.
(%default-authorized-guix-keys): New variable.
(<guix-configuration>)[authorized-keys]: New field.
(guix-shepherd-service): Adjust 'match' clause accordingly.
(guix-activation): Adjust call to 'hydra-key-authorization'.
* doc/guix.texi (Base Services): Document 'authorized-keys'.

* doc/guix.texi: Fix multiple typos.

* gnu/services/spice.scm: New file.
* gnu/local.mk (GNU_SYSTEM_MODULES): Add it.
* doc/guix.texi (Various Services): New subheading.

* doc/guix.texi (Various Services)[Lirc Service]: New subsubheading.
  [lirc] New cindex.

This reverts commit 455859a5.

* doc/guix.texi (Application Setup): Use @xref, not @pxref, when
starting a sentence.
(Scheduled Job Execution): Remove extra indent in example; fix typos.

* doc/guix.texi (Services): Distinguish "service" and "Shepherd
service".  Add xref to "Shepherd Services".

* doc/guix.texi (Locales): Add missing 'of'.

* doc/guix.texi (Installing GuixSD in a VM): New node.
(USB Stick Installation): Refer to it.
(System Installation): Mention "GuixSD".

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

* guix/gnu-maintenance.scm (kde-package?, latest-kde-release): New private
  functions.
  (%kde-updater): New public variable.
* guix/scripts/refresh.scm (list-updaters): Add %kde-updater.
* doc/guix.texi (Invoking guix refresh): Mention the new updater.