Fixes <https://bugs.gnu.org/39060>.
Reported by Tobias Geerinckx-Rice <me@tobias.gr>.
* doc/build.scm (html-manual)[build]: Copy 'htmlxref.cnf' to the current
directory so that 'makeinfo' honors it.
* gnu/services/sound.scm (ladspa-configuration): New record.
(ladspa-environment): New procedure.
(ladspa-service-type): New service type.
(pulseaudio-environment): Remove LADSPA_PATH.
* doc/guix.texi: Adjust documentation.
Signed-off-by: Marius Bakke <mbakke@fastmail.com>
* gnu/services/nfs.scm (<idmap-configuration>)[verbosity]: New field.
(idmap-configuration-verbosity): New procedure.
(idmap-service-type): Use it.
* doc/guix.texi (Network File System): Document it.
* gnu/services/sound.scm (pulseaudio-environment): New procedure.
(pulseaudio-service-type): New variable.
* doc/guix.texi (Sound Services): Document it.
This solution was kindly provided by Bernard M. Wiedemann.
* gnu/services/base.scm (console-font-service-type): Add ter132n (terminus 132
nomal) font example, for HDPI displays.
* doc/guix.texi (Invoking guix system): Update to `guix system search console'
example output.
* gnu/services/web.scm (%mumi-activation, %mumi-accounts): New variables.
(mumi-shepherd-services): New procedure.
(mumi-service-type): New variable.
* doc/guix.texi (Web Services): Document it.
* gnu/build/vm.scm (load-in-linux-vm): Move Qemu network configuration from
ARCH-SPECIFIC-FLAGS to the Qemu command line. Use the "-nic" option of Qemu
instead of "-device" and "-net".
* gnu/system/vm.scm (common-qemu-options): Do not add a '-net' command.
(virtual-machine-compiler): Use "-nic user,..." instead of "-net".
* doc/guix.texi (Installing Guix in a VM, Invoking guix system, Running Guix
in a VM): Do the same for examples.
* guix/scripts/challenge.scm (call-with-nar): New procedure.
(narinfo-contents): Express in terms of 'call-with-nar'.
(call-with-mismatches, report-differing-files/external): New
procedures.
(%diffoscope-command): New variable.
(%options): Support "diffoscope" and a string starting with "/".
* tests/challenge.scm (call-mismatch-test): New procedure.
("differing-files"): Rewrite in terms of 'call-mismatch-test'.
("call-with-mismatches"): New test.
* doc/guix.texi (Invoking guix challenge): Document it.
* guix/scripts/archive.scm (show-help, %options): Add '--list'.
(list-contents): New procedure.
(guix-archive): Honor the '--list' option.
* tests/guix-archive.sh: Test it.
* doc/guix.texi (Invoking guix archive): Document it.
* guix/scripts/pack.scm (squashfs-image)[symlinks*]: New variable.
[build]: Use it instead of SYMLINKS.
(guix-pack): Emit a warning and a hint when "bash" and "bash-minimal"
are missing and PACK-FORMAT is 'squashfs.
* doc/guix.texi (Invoking guix pack): Document the /bin/sh requirement
for Singularity.
* guix/build/syscalls.scm (MS_LAZYTIME): New variable.
* gnu/build/file-systems.scm (mount-flags->bit-mask): Add match rules for
'strict-atime' and 'lazy-time'.
* doc/guix.texi (File Systems): Add 'strict-atime' and 'lazy-time' to the list
of supported flags.
Signed-off-by: Ludovic Courtès <ludo@gnu.org>
* guix/scripts/system.scm (show-help, %options): Add "--save-provenance".
(process-action): Define 'save-provenance?' and 'transform'; call
'transform' on the OS.
* doc/guix.texi (Invoking guix system): Document it under 'reconfigure'.
(Service Reference): Mention that 'provenance-service-type' is
automatically added by 'reconfigure' & 'init'.
* gnu/services/desktop.scm: (<gnome-keyring-configuration>): New record type.
(pam-gnome-keyring): New procedure.
(gnome-keyring-service-type): New variable.
* doc/guix.texi (Desktop Services): Document it.
Signed-off-by: Ludovic Courtès <ludo@gnu.org>
* guix/gexp.scm (local-file): Distinguish the case where FILE is a
literal string and when it's not. Add a clause for when FILE is not a
literal string.
* tests/gexp.scm ("local-file, non-literal relative file name"): New test.
* doc/guix.texi (G-Expressions): Update accordingly.
* gnu/services/pam-mount.scm: New file.
* gnu/local.mk (GNU_SYSTEM_MODULES): Add it.
* doc/guix.texi (PAM Mount Service): New subsection.
Signed-off-by: Ludovic Courtès <ludo@gnu.org>
This is a followup to bc69ea2d60.
* guix/scripts/build.scm (show-build-options-help): Rename
"--no-build-hook" to "--no-offload".
(%standard-build-options): Likewise, and warn when "--no-build-hook" is
passed.
* nix/nix-daemon/guix-daemon.cc (options): Add "--no-offload" and mark
"--no-build-hook" as hidden.
* guix/scripts/offload.scm: Adjust comment.
* doc/guix.texi (Invoking guix-daemon, Common Build Options): Replace
"--no-build-hook" with "--no-offload".
* etc/completion/fish/guix.fish, etc/completion/zsh/_guix: Adjust
accordingly.
* guix/scripts/pack.scm (guix-pack): Collect 'manifest' options, and
concatenate the resulting manifests.
* tests/guix-pack.sh: Test it.
* doc/guix.texi (Invoking guix pack): Document it.
* guix/scripts/package.scm (manifest-action): Remove.
(%actions): Remove it.
(load-manifest): New procedure.
(process-actions): Handle 'manifest' options. Define 'files' from
'manifest' options. Define 'manifest' based on FILES. Define 'trans'
to represent the final transaction.
* tests/guix-package.sh: Test it.
* doc/guix.texi (Invoking guix package): Mention
* tests/guix-environment.sh: Test 'guix environment' with two '-m' options.
* doc/guix.texi (Invoking guix environment): Explain that '-m' can be
passed multiple times.
* guix/scripts/pack.scm (%options, show-help): Add "--derivation".
(guix-pack): Honor it.
* tests/guix-pack.sh: Test it.
* doc/guix.texi (Invoking guix pack): Document it.
* guix/scripts/time-machine.scm: New file.
* Makefile.am: (MODULES): Add it.
* guix/scripts/pull.scm (channel-list): Export.
* guix/inferior.scm (cached-channel-instance): New procedure.
(inferior-for-channels): Use it.
* doc/guix.texi (Invoking guix time-machine): New section.
(Channels): Cross-reference it.
Signed-off-by: Ludovic Courtès <ludo@gnu.org>
* gnu/services/networking.scm (pagekite-service-type): New service type.
(<pagekite-configuration>): New record type.
(pagekite-shepherd-service): New procedure.
* doc/guix.texi (Networking Services): Document it.
* gnu/services/dns.scm (<knot-resolver-configuration>): New record type.
(knot-resolver-activation, knot-resolver-shpherd-services): New procedures.
(%knot-resolver-accounts, %kresd.conf, knot-resolver-service-type): New
variables.
* doc/guix.texi (DNS Services): Document it.
Emphasize that what the '--source' build option downloads is
insufficient for reproducing the packages.
* doc/guix.texi (Additional Build Options): Explain more.
* gnu/services/web.scm (<nginx-configuration>): Add modules field.
(nginx-configuration-modules): New field accessor.
(emit-load-module): New procedure.
(default-nginx-config): Add support for the modules field.
* doc/guix.texi (NGINX): Document it.
* doc/guix.texi (Keyboard Layout and Networking and Partitioning):
Use human readable arguments for 'ip' command. Mention 'ip link set'.
Signed-off-by: Ludovic Courtès <ludo@gnu.org>
* gnu/services/audio.scm (<mpd-output>): New record type.
(<mpd-configuration>)[outputs]: New field.
(mpd-output, mpd-output?, mpd-output->string): New procedures.
(mpd-config->file): Use mpd-output->string.
* doc/guix.texi (Audio Services): Document mpd-output fields.
The XML feed was discontinued on Oct. 16th, 2019:
<https://nvd.nist.gov/General/News/XML-Vulnerability-Feed-Retirement-Phase-3>
* guix/cve.scm (string->date*): New procedure.
(<cve-item>, <cve>, <cve-reference>): New record types.
(cpe-match->cve-configuration, configuration-data->cve-configurations)
(json->cve-items, version-matches?): New procedures.
(yearly-feed-uri): Change URL to refer to JSON feed.
(cpe->product-alist, %parse-vulnerability-feed)
(xml->vulnerabilities): Remove.
(cve-configuration->package-list, merge-package-lists)
(cve-item->vulnerability, json->vulnerabilities): New procedures.
(write-cache): Use 'json->vulnerabilities' instead of
'xml->vulnerabilities', and remove 'parameterize'.
(vulnerabilities->lookup-proc): Use 'version-matches?' when VERSION is
true.
* tests/cve.scm (%sample): Use 'tests/cve-sample.json'.
(%expected-vulnerabilities): Rewrite accordingly.
("json->cve-items", "cve-item-published-date")
("json->vulnerabilities"): New tests.
("xml->vulnerabilities"): Remove.
("vulnerabilities->lookup-proc"): Adjust to new vulnerabilities.
* tests/cve-sample.json: New file.
* tests/cve-sample.xml: Remove.
* Makefile.am (EXTRA_DIST): Adjust accordingly.
* doc/guix.texi (Invoking guix lint): Update nist.gov URLs.
* doc/build.scm (%manual): New variable.
(html-manual): #:manual now defaults to %MANUAL.
[build]: Define 'language->texi-file-name' and use it. Filter out items
of LANGUAGES that lack a .texi file.
(pdf-manual, html-manual-indexes, pdf+html-manual): #:manual now
defaults to %MANUAL.
* doc/guix.texi (Installing Guix in a Virtual Machine):
Pass "order=d" to '-boot' option. Use "-drive media=cdrom" for the ISO
image. Remove paragraph about ordering and the boot menu.
Signed-off-by: Ludovic Courtès <ludo@gnu.org>
* gnu/services/guix.scm: New file.
* gnu/tests/guix.scm: New file.
* gnu/local.mk (GNU_SYSTEM_MODULES): Add both new files.
* doc/guix.texi (Guix Services): New section documenting the Guix Data
Service.
* guix/scripts/pull.scm (display-news-entry)
(display-channel-specific-news): New procedures.
(display-channel-news): Call it.
(display-new/upgraded-packages): Adjust hint message.
* doc/guix.texi (Invoking guix pull): Mention it.
Suggested by Ricardo Wurmus <rekado@elephly.net>.
* guix/channels.scm (<channel-news-entry>)[tag]: New field.
(sexp->channel-news-entry): Accept either 'commit' or 'tag' in 'entry'
forms.
(resolve-channel-news-entry-tag): New procedure.
(channel-news-for-commit): Move 'with-repository' form one level
higher. Call 'resolve-channel-news-entry-tag' on all the news entries.
* guix/tests/git.scm (populate-git-repository): Add clause for 'tag'.
* tests/channels.scm ("channel-news, one entry"): Create a tag and add
an entry with a tag. Check that the tag is resolved and also visible in
the <channel-news-entry> record.
* doc/guix.texi (Channels): Mention tags in news entries.
* guix/channels.scm (<channel-metadata>)[news-file]: New field.
(read-channel-metadata): Set the 'news-file' field.
(read-channel-metadata-from-source): Likewise.
(<channel-news>, <channel-news-entry>): New record types.
(sexp->channel-news-entry, read-channel-news)
(channel-news-for-commit): New procedures.
* guix/tests/git.scm (populate-git-repository): For 'add', allow
CONTENTS to be a procedure.
* tests/channels.scm ("channel-news, no news")
("channel-news, one entry"): New tests.
* doc/guix.texi (Channels): Document it.
* guix/scripts/show.scm: New file.
* Makefile.am (MODULES): Add it.
* po/guix/POTFILES.in: Add it.
* tests/guix-package-aliases.sh: Add test.
* doc/guix.texi (Invoking guix package): Document it and use it in a example.
Signed-off-by: Ludovic Courtès <ludo@gnu.org>
* gnu/services/networking.scm (%default-nftables-ruleset): New variable.
(<nftables-configuration>): New record type.
(nftables-shepherd-service): New procedure.
(nftables-service-type): New service type.
* doc/guix.texi (Networking Services): Document it.
* .gitignore: Update ignore list.
* Makefile.am (assert-no-store-file-names): Exclude the cookbook.
* bootstrap: Generate po files for cookbook translations.
* doc/guix-cookbook.texi: New file.
* doc/local.mk (info_TEXINFOS): Add it; add a rule to build cookbook
translations.
* po/doc/local.mk (DOC_COOKBOOK_PO_FILES): New variable.
(EXTRA_DIST): Add cookbook pot file and po files.
(doc-po-update-cookbook-%): New target.
(doc-pot-update): Also update cookbook pot file.
(doc-po-update): Also update cookbook po files.
* gnu/services/certbot.scm (certbot-command): Add
--manual-public-ip-logging-ok flag to the certbot command when doing a
manual challenge.
Signed-off-by: Ludovic Courtès <ludo@gnu.org>
* guix/import/crate.scm (crate->guix-package): Add optional 'version'
argument and honor it.
* guix/scripts/import/crate.scm (guix-import-crate): Assume the first
argument is a spec and destructure it with
'package-name->name+version'. Pass both to 'crate->guix-package'.
* doc/guix.texi (Invoking guix import): Document it.
Co-authored-by: Ludovic Courtès <ludo@gnu.org>
* gnu/services/networking.scm (ntp-server-types): New enum.
(<ntp-server>): New record type.
(ntp-server->string): New procedure.
(%ntp-servers): Define in terms of <htp-server> records. Use the first
entrypoint server as a pool instead of a list of static servers. This is more
resilient since a new server of the pool can be interrogated on every
request. Add the 'iburst' options.
(ntp-configuration-servers): Define a custom accessor that warns but honors
the now deprecated server format.
(<ntp-configuration>): Use it.
(%openntpd-servers): New variable,
(<openntpd-configuration>): Use it, as a pool ('servers' field) instead of a
regular server.
* tests/networking.scm: New file.
* Makefile.am (SCM_TESTS): Register it.
* doc/guix.texi: Update documentation.
This is documented as best practice in `man ntpd', and is required to allow
the date to be set correctly when traveling (without having to manually update
the hardware clock in the BIOS/UEFI).
* gnu/services/networking.scm (<ntp-server>)[allow-large-adjustment?]: Set the
default value to #t.
* doc/guix.texi (Networking Services): Update documentation.
This is a followup to f8c143a713, which
allows syntax highlighting of @lisp snippets in the HTML output.
* doc/guix.texi, doc/contributing.texi: Use @lisp instead of @example
for all the Scheme snippets.
* gnu/services/cups.scm (error-policy, cups-configuration): Substitute
RETRY-CURRENT-JOB for the obsolete RETRY-THIS-JOB name of this policy.
* doc/guix.texi (Printing Services): Likewise.
* gnu/services/cups.scm (comma-separated-string-list?)
(serialize-comma-separated-string-list): New variables.
(cups-configuration)[browse-dns-sd-sub-types]: New field.
* doc/guix.texi (Printing Services): Document it.
* guix/import/cran.scm (vcs-file?): New procedure.
(download): Support downloading from git.
(fetch-description): Add a clause for the 'git repository type.
(files-match-pattern?): New procedure.
(tarball-files-match-pattern?): Implement in terms of FILES-MATCH-PATTERN?.
(directory-needs-fortran?, directory-needs-zlib?,
directory-needs-pkg-config?): New procedures.
(needs-fortran?, needs-zlib?, needs-pkg-config?): Rename these procedures...
(tarball-needs-fortran?, tarball-needs-zlib?, tarball-needs-pkg-config?):
...to this, and use them.
(file-hash): New procedure.
(description->package): Handle the 'git repository type.
* guix/import/utils.scm (package->definition): Handle package expression
inside of a let.
* guix/scripts/import.scm (guix-import): Handle let expressions.
* doc/guix.texi (Invoking guix import): Document it.
* gnu/services/cuirass.scm (<cuirass-configuration>): Add web-log-file field.
(cuirass-shepherd-service): Read it and use it.
* doc/guix.texi (Continuous Integration): Document it.
…except for ‘AllowDH’, which makes no sense on GNU TLS systems.
* gnu/services/cups.scm (ssl-options?): Validate ‘DenyCBC’ and
‘DenyTLS1.0’.
* doc/guix.texi (Printing Services): Document them both.
Following some discussion with Ludovic (see:
https://lists.gnu.org/archive/html/guix-patches/2019-08/msg00506.html), it is
better advice to generally recommend the use of `program-file' for any usage
of modules, not just for those which define syntax.
* doc/guix.texi (Scheduled Job Execution): Drop the following text: "that
defines syntax (macros)".
* guix/ssh.scm (remote-authorize-signing-key): New variable.
* gnu/machine/ssh.scm (deploy-managed-host): Authorize coordinator's
signing key before any invocations of 'remote-eval'.
(deploy-managed-host): Display an error if a signing key does not exist.
* doc/guix.texi (Invoking guix deploy): Remove section describing manual
signing key authorization.
(Invoking guix deploy): Add section describing the 'authorize?' field.
* doc/guix.texi (Invoking guix deploy): Add section describing
prerequisites for deploying as a non-root user.
* guix/remote.scm (remote-pipe-for-gexp): New optional 'become-command'
argument.
(%remote-eval): New optional 'become-command' argument.
(remote-eval): New 'become-command' keyword argument.
* guix/ssh.scm (remote-inferior): New optional 'become-command'
argument.
(inferior-remote-eval): New optional 'become-command' argument.
(remote-authorize-signing-key): New optional 'become-command' argument.
* gnu/machine/ssh.scm (machine-become-command): New variable.
(managed-host-remote-eval): Invoke 'remote-eval' with the
'#:become-command' keyword.
(deploy-managed-host): Invoke 'remote-authorize-signing-key' with the
'#:become-command' keyword.
* gnu/machine/ssh.scm (machine-ssh-configuration): Add 'system' field.
(managed-host-remote-eval): Pass 'system' field to 'remote-eval'.
(machine-check-building-for-appropriate-system): New variable.
(check-deployment-sanity): Add call to
'machine-check-building-for-appropriate-system'.
* doc/guix.texi (Invoking guix deploy): Describe new 'system' field.
* guix/ssh.scm (remote-system): New variable.
* guix/remote.scm (remote-eval): Use result of 'remote-system' when
lowering the G-Expression.
(remote-eval): Add 'system' keyword argument.
(trampoline): Return a <program-file> rather than a <scheme-file>.
* gnu/machine.scm (machine-system): Delete variable.
(machine-operating-system): New variable.
All callers changed.
* doc/guix.texi (Invoking guix deploy): Use the
'machine-operating-system' accessor rather than 'machine-system'.
* guix/build/cargo-build-system.scm (generate-all-checksums): New
procedure.
(update-cargo-lock, patch-cargo-checksums): New phases.
(%standard-phases): Add 'update=cargo-lock after 'configure and
'patch-cargo-checksums after 'patch-generated-file-shebangs.
* doc/guix.texi (Build System)[cargo-build-system]: Mention how
Cargo.lock files are handled.
Fixes <https://bugs.gnu.org/36813>.
Reported by Jakob L. Kreuze <zerodaysfordays.sdf.org@sdf.org>.
* guix/gexp.scm (program-file-compiler): Pass #:system and #:target to
'gexp->script'.
(load-path-expression): Add #:system and #:target and honor them.
(gexp->script): Likewise.
* tests/gexp.scm ("program-file #:system"): New test.
* doc/guix.texi (G-Expressions): Adjust accordingly.
Guile-JSON 3.x is incompatible with Guile-JSON 1.x, which we relied on
until now: it maps JSON dictionaries to alists (instead of hash tables),
and JSON arrays to vectors (instead of lists). This commit is about
adjusting all the existing code to this new mapping.
* m4/guix.m4 (GUIX_CHECK_GUILE_JSON): New macro.
* configure.ac: Use it.
* doc/guix.texi (Requirements): Mention the Guile-JSON version.
* guix/git-download.scm (git-fetch)[guile-json]: Use GUILE-JSON-3.
* guix/import/cpan.scm (string->license): Expect vectors instead of
lists.
(module->dist-name): Use 'json-fetch' instead of 'json-fetch-alist'.
(cpan-fetch): Likewise.
* guix/import/crate.scm (crate-fetch): Likewise, and call 'vector->list'
for DEPS.
* guix/import/gem.scm (rubygems-fetch): Likewise.
* guix/import/json.scm (json-fetch-alist): Remove.
* guix/import/pypi.scm (pypi-fetch): Use 'json-fetch' instead of
'json-fetch-alist'.
(latest-source-release, latest-wheel-release): Call 'vector->list' on
RELEASES.
* guix/import/stackage.scm (stackage-lts-info-fetch): Use 'json-fetch'
instead of 'json-fetch-alist'.
(lts-package-version): Use 'vector->list'.
* guix/import/utils.scm (hash-table->alist): Remove.
(alist->package): Pass 'vector->list' on the inputs fields, and default
to the empty vector.
* guix/scripts/import/json.scm (guix-import-json): Remove call to
'hash-table->alist'.
* guix/swh.scm (define-json-reader): Expect pair? or null? instead of
hash-table?.
[extract-field]: Use 'assoc-ref' instead of 'hash-ref'.
(json->branches): Use 'map' instead of 'hash-map->list'.
(json->checksums): Likewise.
(json->directory-entries, origin-visits): Call 'vector->list' on the
result of 'json->scm'.
* tests/import-utils.scm ("alist->package with dependencies"): New test.
* gnu/installer.scm (build-compiled-file)[builder]: Use GUILE-JSON-3.
* gnu/installer.scm (installer-program)[installer-builder]: Likewise.
* gnu/installer/locale.scm (iso639->iso639-languages): Use 'assoc-ref'
instead of 'hash-ref', and pass vectors through 'vector->list'.
(iso3166->iso3166-territories): Likewise.
* gnu/system/vm.scm (system-docker-image)[build]: Use GUILE-JSON-3.
* guix/docker.scm (manifest, config): Adjust for Guile-JSON 3.
* guix/scripts/pack.scm (docker-image)[build]: Use GUILE-JSON-3.
* guix/import/github.scm (fetch-releases-or-tags): Update docstring.
(latest-released-version): Use 'assoc-ref' instead of 'hash-ref'. Pass
the result of 'fetch-releases-or-tags' to 'vector->list'.
* guix/import/launchpad.scm (latest-released-version): Likewise.
* doc/contributing.texi (Building from Git, Running Guix Before It Is
Installed): Make instructions using Guix come first and clarify which code is
an instruction and which is merely an example.
Signed-off-by: Ludovic Courtès <ludo@gnu.org>
Suggested by Julien Lepiller.
* doc/build.scm (html-manual-indexes)[build]: Add 'with-extensions'.
(translate): Actually honor DOMAIN. Add call to 'bindtextdomain' for
ISO-CODES.
(%iso639-languages): New variable.
(language-code->name, top-level-index): New procedures.
Add call to 'write-html' for OUTPUT/index.html.
* doc/build.scm (html-manual-indexes)[build](sxml-index): Generalize;
add a 'title' and a 'body' parameter and honor them.
(language-index): New procedure.
(write-index): Remove.
(write-html): New procedure.
Use 'write-html' and 'language-index'.
* guix/build/node-build-system.scm: New file.
* guix/build-system/node.scm: New file.
* guix/build/json.scm: New file.
* doc/guix.texi: Document it.
* Makefile.am: Added new files.
Co-Authored-By: Julien Lepiller <julien@lepiller.eu>
* guix/channels.scm (<channel-metadata>): Add directory slot. Update users.
(read-channel-metadata-from-source): New function.
(standard-module-derivation): Use it.
* doc/guix.texi (Package Modules in a Subdirectory): New subsection.
This mirrors the steps performed by etc/guix-install.sh.
* doc/guix.texi (KEY-SERVER): Replace moribund SKS key servers with...
(OPENPGP-SIGNING-KEY-URL): ...the TLS PKI of the future.
(Binary Installation, USB Stick and DVD Installation): Update the
@example gpg command to download the key directly from Savannah.
* doc/guix.texi (Invoking guix environment): Add --no-cwd.
* guix/scripts/environment.scm (show-help, %options): Add --no-cwd.
(launch-environment/container): Add 'map-cwd?' param; only add mapping
for cwd if #t. Only change to cwd within container if #t, otherwise
home.
(guix-environment): Error if --no-cwd without --container. Provide
'(not no-cwd?)' to launch-environment/container as 'map-cwd?'.
* tests/guix-environment.sh: Add test for no-cwd.
Co-authored-by: Mike Gerwitz <mtg@gnu.org>
* gnu/services/networking.scm (usb-modeswitch-service-type): New variable.
(usb-modeswitch-configuration): New variable.
(usb-modeswitch-sh): New procedure.
(usb-modeswitch-configuration->udev-rules): New procedure.
* doc/guix.texi (Networking Services): Document it.
Signed-off-by: Ludovic Courtès <ludo@gnu.org>