pack: Add '--manifest'.

* guix/scripts/pack.scm (%options, show-help): Add --manifest.
(guix-pack)[manifest-from-args]: New procedure.
Use it.
* doc/guix.texi (Invoking guix pack): Document --manifest.

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

services: agetty: Add agetty instance to base services. Make its tty optional.

* gnu/services/base.scm (%base-services): Instantiate agetty-service.
(default-serial-port): New variable.
(agetty-shepherd-service): Make tty optional, default to the above.
* doc/guix.texi (agetty-configuration): Update "tty" documentation.
* gnu/system/install.scm (agetty-default-service): Delete variable.
(embedded-installation-os): Remove agetty-default-service instance.
Add "console" kernel-argument.

gnu: Add cat-avatar-generator-service.

* gnu/services/web.scm (cat-avatar-generator-service): New variable.
* doc/guix.text (Web Services): Document it.

doc: Mention starting GNOME on Wayland manually.

* doc/guix.texi (Desktop Services): Mention starting GNOME on Wayland manually.

gnu: services: Add wesnothd service.

* gnu/services/games.scm: New file.
* gnu/local.mk (GNU_SYSTEM_MODULES): Add it.
* doc/guix.texi (Game Services): Document the service.

etc: Add SELinux policy for the daemon.

* etc/guix-daemon.cil.in: New file.
* Makefile.am (dist_selinux_policy_DATA): Define it.
* configure.ac: Handle --with-selinux-policy-dir.
* doc/guix.texi (SELinux Support): New section.

doc: Document the 'upstream-name' property.

Reported by Hartmut Goebel <h.goebel@crazy-compilers.com>.

* doc/guix.texi (Invoking guix refresh): Document 'upstream-name'.

doc: guix-publish-configuration-ttl is in seconds.

* doc/guix.texi (Base Services): Document that
guix-publish-configuration-ttl takes its value in seconds.

etc: Add installation script.

* etc/guix-install.sh: New file.
* Makefile.am (EXTRA_DIST): Add it.
* doc/guix.texi (Binary Installation): Mention it.

Co-authored-by: sharlatan <sharlatanus@gmail.com>

doc: Unconfuse file systems and partitions.

Partitions can have their own labels and UUIDs (e.g. under GPT) that are
unrelated to those of the contained file system.  Confusing the two ends
poorly.

* doc/guix.scm (File Systems, Proceeding with the Installation)
(Using the Configuration System, Initial RAM Disk): Substitute `file
system' for `partition' when talking about labels and UUIDs.

doc, gnu: Fix spelling of screen-things.

* doc/guix.texi (X Window): Write 'screen locker' and 'screen saver' in
prose.
* gnu/services/xorg.scm (screen-locker-service): Likewise.

doc: Fix SCREEN-LOCKER-SERVICE description.

* doc/guix.texi (X Window): Correct the documentation for the
SCREEN-LOCKER-SERVICE procedure.

doc: Replace a stale reference to a code snippet.

The text refers to a snippet which has since been removed, but a
suitable replacement is near.  Use it.

* doc/guix.texi (Using the Configuration System): Substitute bind for
tcpdump.

doc: Mention escpr in CUPS configuration example.

Suggested by Danny Milosavljevic <dannym@scratchpost.org>.

* doc/guix.texi (Printing Services): Mention how to add support for
Epson printers to CUPS via escpr in the configuration example.

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

doc: Improve ‘fix-runpath’ description.

* doc/guix.texi (Build Systems): Re-write ‘fix-runpath’ documentation
entirely.  Just fixing the typos didn't do much.

services: Missing services are automatically instantiated.

This simplifies OS configuration: users no longer need to be aware of
what a given service depends on.

See the discussion at
<https://lists.gnu.org/archive/html/guix-devel/2018-01/msg00114.html>.

* gnu/services.scm (missing-target-error): New procedure.
(service-back-edges): Use it.
(instantiate-missing-services): New procedure.
* gnu/system.scm (operating-system-services): Call
'instantiate-missing-services'.
* tests/services.scm ("instantiate-missing-services")
("instantiate-missing-services, no default value"): New tests.
* gnu/services/version-control.scm (cgit-service-type)[extensions]: Add
FCGIWRAP-SERVICE-TYPE.
* gnu/tests/version-control.scm (%cgit-os): Remove NGINX-SERVICE-TYPE
and FCGIWRAP-SERVICE-TYPE instances.
* doc/guix.texi (Log Rotation): Remove 'mcron-service-type' in example.
(Miscellaneous Services): Remove 'nginx-service-type' and
'fcgiwrap-service-type' in Cgit example.

build: Declare “doc/guix.texi“ dependencies.

Fixes <https://bugs.gnu.org/29727>.

* doc/local.mk (%C%_guix_TEXINFOS): New variable containing files included by
“doc/guix.texi”.
(EXTRA_DIST): Remove ‘.texi’ files.

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

gnu: Consistently Write ‘file system(s)’.

It is the GNU way.

* doc/guix.texi (Build Systems, DNS Services): Write ‘file system(s)’.
* gnu/build/vm.scm (create-ext-file-system, create-fat-file-system):
Likewise.
* gnu/packages/backup.scm (dirvish, rsnapshot)[description]: Likewise.
* gnu/packages/check.scm (python-testpath)[description]: Likewise.
* gnu/packages/disk.scm (pydf)[description]: Likewise.
* gnu/packages/file-systems.scm (disorderfs)[synopsis, description]: Likewise.
(glusterfs)[description]: Likewise.
* gnu/packages/haskell.scm (ghc-directory, ghc-system-fileio-bootstrap)
(ghc-system-fileio)[synopsis]: Likewise.
(ghc-fsnotify)[description]: Likewise.
* gnu/packages/linux.scm (proot)[description]: Likewise.
(jmtpfs)[synopsis, description]: Likewise.
* gnu/packages/mate.scm (caja, caja-extensions)[description]: Likewise.
* gnu/packages/storage.scm (ceph)[description]: Likewise.
* gnu/packages/sync.scm (lsyncd)[description]: Likewise.
* gnu/packages/syncthing.scm (syncthing)[synopsis]: Likewise.
(go-github-com-zillode-notify)[description]: Likewise.
* gnu/services/nfs.scm (pipefs-service-type): Likewise.
* guix/scripts/system.scm (perform-action): Likewise.

doc: Suggest running guix-daemon with 'sudo -E'.

Suggested by Martin H. <maze@strahlungsfrei.de>.

* doc/contributing.texi (Running Guix Before It Is Installed): Suggest
'sudo -E'.

docs: Fix typo in qemu-binfmt example.

* doc/guix.texi (Virtualization Services): Document 'guix-support?' properly.