* gnu/system/install.scm (os-with-u-boot): New procedure.
* gnu/packages/bootloaders.scm (make-u-boot-package): Export.
* doc/guix.texi (Building the Installation Image for ARM Boards): New
subsection.

The next commits make (sqlite3) an indirect dependency of (gnu build
install), which is itself used by (guix scripts system), hence this new
requirement.

* configure.ac: Error out when $guix_cv_have_recent_guile_sqlite3 is
false.  Remove HAVE_GUILE_SQLITE3 Automake conditional.
* Makefile.am (MODULES, SCM_TESTS): Remove HAVE_GUILE_SQLITE3 conditions.
* doc/guix.texi (Requirements): Add Guile-SQLite3.
* README: Ditto.
* gnu/packages/package-management.scm (guix)[propagated-inputs]: Add
GUILE-SQLITE3.
[arguments]: In 'wrap-program' phase, take guile-sqlite3 into account.

* guix/scripts/pull.scm (show-help, %options): Add '--list-generations'.
(display-profile-content, process-query): New procedures.
(guix-pull): Honor '--list-generations'.

This helpful when adding content to the nginx configuration file, which isn't
supported by the record type used for the configuration.  For example, like
adding proxy_cache_path configuration.

* gnu/packages/web.scm (<nginx-configuration>): Add new extra-content field.
  (nginx-configuration-extra-content): New field accessor.
  (default-nginx-config): Add support for the extra-content field.
* doc/guix.texi (NGINX): Document the new extra-content field.

* guix/scripts/pull.scm (%pull-version): New variable.
(build-from-source): Pass #:pull-version to BUILD.
(whole-package-for-legacy, derivation->manifest-entry): New procedure.
(build-and-install): Rewrite in terms of 'build-and-use-profile'.
* guix/scripts/system.scm (maybe-suggest-running-guix-pull)[latest]:
Switch to "/current".
* scripts/guix.in (augment-load-paths!): Remove use of
~/.config/guix/latest.
* build-aux/compile-as-derivation.scm: Replace "/guix/latest/" with
"/current/share/guile/site/X.Y"
* guix/scripts.scm (warn-about-old-distro)[age]: Check "/current"
instead of "/latest".
* doc/guix.texi (Invoking guix pull): Document it.
* doc/contributing.texi (Running Guix Before It Is Installed): Remove
footnote about abusing ~/.config/guix/latest.

* doc/guix.texi (Xorg display): Add an example xorg keymap configuration.

The 'no-negcache?' option is mapped to the '--no-negcache' command-line
argument directly, but we're in the scheme world, where the general guideline
is to avoid double-negations in identifiers.

* gnu/services/dns.scm <dnsmasq-configuration>: Replace the 'no-negcache?'
field with 'negative-cache?'.
* doc/guix.texi (DNS Services)[Dnsmasq Service]: Adjust accordingly.

* doc/guix.texi (Invoking guix import): Document elpa recursive import.
* guix/import/elpa.scm (elpa-package->sexp): Return package and
dependencies values.
(elpa-guix-name, elpa-recursive-import): New procedures.
* guix/scripts/import/elpa.scm (show-help, %options): Add recursive
option.
(guix-import-elpa): Use 'elpa-recursive-import'.

* gnu/services/dns.scm (dnsmasq-service-type): New variable.
(<dnsmasq-configuration>): New record type.
(dnsmasq-shepherd-service): New procedure.
* doc/guix.texi (DNS Services): Document it.

* guix/gexp.scm (<gexp>)[extensions]: New field.
(gexp-attribute): New procedure.
(gexp-modules): Write in terms of 'gexp-attribute'.
(gexp-extensions): New procedure.
(gexp->derivation): Add #:effective-version.
[extension-flags]: New procedure.
Honor extensions of EXP.
(current-imported-extensions): New syntax parameter.
(with-extensions): New macro.
(gexp): Honor CURRENT-IMPORTED-EXTENSIONS.
(compiled-modules): Add #:extensions and honor it.
(load-path-expression): Likewise.
(gexp->script, gexp->file): Honor extensions.
* tests/gexp.scm (%extension-package): New variable.
("gexp-extensions & ungexp")
("gexp-extensions & ungexp-splicing")
("gexp-extensions and literal Scheme object")
("gexp->derivation & with-extensions")
("program-file & with-extensions"): New tests.
* doc/guix.texi (G-Expressions): Document 'with-extensions'.

* gnu/service/web.scm (<hpcguix-web-configuration>): New record-type.
  (%hpcguix-web-accounts): New variable.
  (%hpcguix-web-activation,hpcguix-web-shepherd-service,
  hpcguix-web-service-type): New procedures.
* gnu/tests/web.scm (run-hpcguix-web-server-test): New procedure.
  (%hpcguix-web-specs, %hpcguix-web-os, %test-hpcguix-web): New variable.
* doc/guix.texi (Web Services): Add 'hpcguix-web'.

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

* doc/guix.texi (Invoking guix pack): Add concept index entry for Docker.

* guix/scripts/pack.scm (%formats): Add "squashfs" format.
(guix-pack): Adjust "archiver" dependent on pack-format.
(squashfs-image): New procedure.
* doc/guix.texi (Invoking guix pack): Document it.

The 'title' field was easily overlooked and was an endless source of
confusion.  Now, the value of the 'device' field is self-contained.

* gnu/system/file-systems.scm (<file-system>): Change constructor name
to '%file-system'.
[title]: Remove.
(<file-system-label>): New record type with printer.
(report-deprecation, device-expression)
(process-file-system-declaration, file-system): New macros.
(file-system-title): New procedure.
(file-system->spec, spec->file-system): Adjust to handle
<file-system-label>.
* gnu/system.scm (bootable-kernel-arguments): Add case for
'file-system-label?'.
(read-boot-parameters): Likewise.
(mapped-device-user): Avoid 'file-system-title'.
(fs->boot-device): Remove.
(operating-system-boot-parameters): Use 'file-system-device' instead of
'fs->boot-device'.
(device->sexp): Add case for 'file-system-label?'.
* gnu/bootloader/grub.scm (grub-root-search): Add case for
'file-system-label?'.
* gnu/system/examples/bare-bones.tmpl,
gnu/system/examples/beaglebone-black.tmpl,
gnu/system/examples/lightweight-desktop.tmpl,
gnu/system/examples/vm-image.tmpl: Remove uses of 'title'.
* gnu/system/vm.scm (virtualized-operating-system): Remove uses of
'file-system-title'.
* guix/scripts/system.scm (check-file-system-availability): Likewise,
and adjust fix-it hint.
(check-initrd-modules)[file-system-/dev]: Likewise.
* gnu/build/file-systems.scm (canonicalize-device-spec): Remove 'title'
parameter.
[canonical-title]: Remove.
Match on SPEC's type rather than on CANONICAL-TITLE.
(mount-file-system): Adjust caller.
* gnu/build/linux-boot.scm (boot-system): Interpret ROOT here.
* gnu/services/base.scm (file-system->fstab-entry): Remove use of
'file-system-title'.
* doc/guix.texi (File Systems): Remove documentation of the 'title'
field.  Rewrite documentation of 'device' and document
'file-system-label'.

* gnu/services/desktop.scm (<enlightenment-desktop-configuration>,
enlightenment-desktop-service-type): New variables.
* doc/guix.texi (Desktop Services): Document the service.
* NEWS: Mention it.

Instead of having the service manage the list, it's useful to be able to point
this at an existing file, for example, when using cgit together with gitolite.

* gnu/services/cgit.scm (project-list?): New procedure.
(serialize-project-list): Handle file-object values.
(<cgit-configuration>): Change the predicate for project-list to allow lists
and file-objects.

* nix/libstore/build.cc (canBuildLocally): Allow building armhf-linux
builds on aarch64-linux.
(DerivationGoal::runChild) Throw error if attempting to build for
armhf-linux on an unsupported platform.
* doc/guix.texi (Invoking guix build): Document how to build natively
for armhf-linux on aarch64-linux.  Add note that on some aarch64
machines this is unsupported.

* doc/guix.texi (Invoking guix size): Update example.

Suggested by Martin Castillo <castilma@uni-bremen.de>.
Fixes <https://bugs.gnu.org/31456>.

* doc/guix.texi (Invoking guix size): Clarify that 'guix size' looks for
ungrafted packages.  Clarify that it can be passed several package
specifications.

* doc/guix.texi (Invoking guix lint): Add cpe-version to example.
(Invoking guix lint): Add example for lint-hidden-cve.

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

* doc/guix.texi (Bitlbee Service): Add plugins.
* gnu/services/messaging.scm (<bitlbee-configuration>): Add plugins argument.
  (bitlbee-shepherd-service): Update config file.

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

* gnu/packages/aux-files/run-in-namespace.c: New file.
* Makefile.am (AUX_FILES): Add it.
* guix/scripts/pack.scm (<c-compiler>): New record type.
(c-compiler, bootstrap-c-compiler, c-compiler-compiler): New procedures.
(self-contained-tarball): Use
'relative-file-name' for the SOURCE -> TARGET symlink.
(docker-image): Add 'defmod' to please Geiser.
(wrapped-package, map-manifest-entries): New procedures.
(%options, show-help): Add --relocatable.
(guix-pack): Honor it.

* doc/guix.texi (Build Systems): Add 'android-ndk-build-system'.

* doc/guix.texi (X Window): Fix ‘xinitr ’ typo.

* doc/guix.texi (Desktop Services): Use 'any' when refering to more than
two desktop environments.

* gnu/services/sound.scm: New file.
* gnu/local.mk (GNU_SYSTEM_MODULES): Add this.
* doc/guix.texi (Sound Services): New chapter.

* gnu/services/base.scm (%default-gpm-options): New variable.
(<gpm-configuration>)[gpm, options]: Add default values.
(gpm-service-type)[default-value]: New field.
(gpm-service): Use %DEFAULT-GPM-OPTIONS and mark as deprecated.
* doc/guix.texi (Base Services): Document 'gpm-service-type' and
'gpm-configuration'.  Remove 'gpm-service'.

* gnu/services/networking.scm (modem-manager-service-type): New variable.
(<modem-manager-configuration>): New variable.
(modem-manager-configuration): New procedure.
(modem-manager-configuration?): New procedure.
* doc/guix.texi (Networking Services): Document it.
* gnu/tests/networking.scm: Import (gnu services base).

* doc/guix.texi (Networking Services): Document it.
* gnu/services/networking.scm (dhcpd-service-type): Add it.
(dhcpd-configuration, dhcpd-configuration?): Add it.
(dhcpd-configuration-package): Add it.
(dhcpd-configuration-config-file): Add it.
(dhcpd-configuration-version): Add it.
(dhcpd-configuration-run-directory): Add it.
(dhcpd-configuration-lease-file): Add it.
(dhcpd-configuration-pid-file): Add it.
(dhcpd-configuration-interfaces): Add it.
* gnu/tests/networking.scm (minimal-dhcpd-v4-config-file)
(dhcpd-v4-configuration, %dhcpd-os, run-dhcpd-test, %test-dhcpd): New
variables.

* doc/guix.texi (Version Control Services): Update accordingly.
* gnu/services/cgit.scm (cgit-configuration)[project-list]: New field.
(serialize-project-list): New procedure that uses PLAIN-FILE to generate a
file from the string list given by the user as input.
(serialize-cgit-configuration): Make sure to serialize 'project-list' before
'repostory-directory'.

* doc/guix.texi (Version Control Services): Update accordingly.
* gnu/services/cgit.scm (serialize-field, serialize-string, serialize-boolean,
serialize-integer, serialize-repository-cgit-configuration-list,
serialize-nginx-server-configuration-list, serialize-repo-field,
serialize-repo-boolean, serialize-repo-integer, serialize-module-link-path,
serialize-repository-directory, serialize-mimetype-alist): Return strings or
string-valued gexps and stop printing.
(repository-cgit-configuration)[source-filter, about-filter, commit-filter,
logo, owner-filter], (cgit-configuration)[auth-filter, commit-filter, css,
email-filter, favicon, include, logo, owner-filter, mimetype-file, readme,
source-filter]: Replace STRING with FILE-OBJECT.
(file-object?, serialize-file-object, repo-file-object?,
serialize-repo-file-object): New procedures.
(cgit-activation): Use SERIALIZE-CONFIGURATION's return value with
MIXED-TEXT-FILE instead of using its output with PLAIN-FILE.

* guix/gexp.scm (<scheme-file>)[splice?]: New field.
(scheme-file): Add #:splice? and pass it to '%scheme-file'.
(scheme-file-compiler): Pass SPLICE? to 'gexp->file'.
(gexp->file): Add #:splice? and honor it.
* tests/gexp.scm ("gexp->file + #:splice?"): New test.
("gexp->derivation & with-imported-module & computed module"): Use
 #:splice? #t.

* doc/guix.texi (Preparing for Installation)
(Proceeding with the Installation): Recommend nano.

Fixes <https://bugs.gnu.org/30830>.
Suggested by Ricardo Wurmus <rekado@elephly.net>.

* guix/scripts/package.scm (build-and-use-profile): Add
 #:allow-collisions? and pass it to 'profile-derivation'.
(show-help, %options): Add '--allow-collisions'.
(manifest-action, process-actions): Pass #:allow-collisions? to
'build-and-use-profile'.
* tests/guix-package.sh: Add collision test.
* doc/guix.texi (Invoking guix package): Document '--allow-collisions'.

* doc/guix.texi (Service Reference): Correct and clarify some statements
  regarding the "compose" and "extend" procedures of <service-type>.

* etc/guix-install.sh (ROOT_HOME): New variable.
  (sys_create_store, sys_enable_guix_daemon, sys_authorize_build_farms):
  Use ROOT_HOME instead of ~root or the HOME environment variable.
* doc/guix.texi (Binary Installation): Instead of assuming that ~ and
  $HOME refer to root's directory simply because commands are being run
  as root, explicilty refer to it via ~root.

Fixes: <https://bugs.gnu.org/30728>

* guix/scripts/weather.scm (histogram, throughput, queued-subset): New
procedures.
(report-server-coverage): Report CI information.
* doc/guix.texi (Invoking guix weather): Document it.

* guix/scripts/gc.scm (show-help, %options): Add '--derivers'.
(guix-gc): Handle 'list-derivers'.
* tests/guix-gc.sh: Add test.
* doc/guix.texi (Invoking guix gc): Document it.

* guix/scripts/graph.scm (module-from-package)
(source-module-dependencies*): New procedures.
(%module-node-type): New variable.
(%node-types): Add it.
* guix/modules.scm (source-module-dependencies): Export.
* tests/graph.scm ("module graph"): New test.
* doc/guix.texi (Invoking guix graph): Document it.

* doc/guix.texi (Web Services): Fix ‘wether’ typo.