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;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2012 Andreas Enge <andreas@enge.fr>
;;; Copyright © 2017 Ricardo Wurmus <rekado@elephly.net>
;;; Copyright © 2017 Eric Bavier <bavier@member.fsf.org>
;;; Copyright © 2018 Tobias Geerinckx-Rice <me@tobias.gr>
;;;
;;; This file is part of GNU Guix.
;;;
;;; GNU Guix is free software; you can redistribute it and/or modify it
;;; under the terms of the GNU General Public License as published by
;;; the Free Software Foundation; either version 3 of the License, or (at
;;; your option) any later version.
;;;
;;; GNU Guix is distributed in the hope that it will be useful, but
;;; WITHOUT ANY WARRANTY; without even the implied warranty of
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
;;; GNU General Public License for more details.
;;;
;;; You should have received a copy of the GNU General Public License
;;; along with GNU Guix.  If not, see <http://www.gnu.org/licenses/>.

(define-module (gnu packages gsasl)
  #:use-module (gnu packages)
  #:use-module (gnu packages compression)
  #:use-module (gnu packages libidn)
  #:use-module (gnu packages nettle)
  #:use-module (gnu packages kerberos)
  #:use-module (gnu packages tls)
  #:use-module ((guix licenses) #:prefix license:)
  #:use-module (guix packages)
  #:use-module (guix download)
  #:use-module (guix build-system gnu))

(define-public libntlm
  (package
    (name "libntlm")
    (version "1.5")
    (source (origin
              (method url-fetch)
              (uri (string-append "https://www.nongnu.org/libntlm/releases/"
                                  "libntlm-" version ".tar.gz"))
              (sha256
               (base32
                "1gcvv7f9rggpxay81qv6kw5hr6gd4qiyzkbwhzz02fx9jvv9kmsk"))))
    (build-system gnu-build-system)
    (synopsis "Library that implements NTLM authentication")
    (description
     "Libntlm is a library that implements NTLM authentication.")
    (license license:lgpl2.1+)
    (home-page "https://www.nongnu.org/libntlm/")))

(define-public gss
  (package
   (name "gss")
   (version "1.0.3")
   (source (origin
            (method url-fetch)
            (uri (string-append "mirror://gnu/gss/gss-" version
                                ".tar.gz"))
            (sha256 (base32
                     "1syyvh3k659xf1hdv9pilnnhbbhs6vfapayp4xgdcc8mfgf9v4gz"))))
   (build-system gnu-build-system)
   (inputs `(("nettle" ,nettle)
             ("shishi" ,shishi)
             ("zlib" ,zlib)))
   (synopsis "Generic Security Service library")
   (description
    "The GNU Generic Security Service provides a free implementation of the
GSS-API specification.  It provides a generic application programming
interface for programs to access security services.  Security services present
a generic, GSS interface, with which the calling application interacts via
this library, freeing the application developer from needing to know about
the underlying security implementation.")
   (license license:gpl3+)
   (home-page "https://www.gnu.org/software/gss/")))

(define-public gsasl
  (package
   (name "gsasl")
   (version "1.8.0")
   (source (origin
            (method url-fetch)
            (uri (string-append "mirror://gnu/gsasl/gsasl-" version
                                ".tar.gz"))
            (sha256 (base32
                     "1rci64cxvcfr8xcjpqc4inpfq7aw4snnsbf5xz7d30nhvv8n40ii"))
            (modules '((guix build utils)))
            (snippet
             '(begin
                ;; The gnulib test-lock test is prone to writer starvation
                ;; with our glibc@2.25, which prefers readers, so disable it.
                ;; The gnulib commit b20e8afb0b2 should fix this once
                ;; incorporated here.
                (substitute* "tests/Makefile.in"
                  (("test-lock\\$\\(EXEEXT\\) ") ""))
                #t))))
   (build-system gnu-build-system)
   (inputs `(("libidn" ,libidn)
             ("libntlm" ,libntlm)
             ("gss" ,gss)
             ("zlib" ,zlib)))
   (propagated-inputs
    ;; Propagate GnuTLS because libgnutls.la reads `-lnettle', and Nettle is a
    ;; propagated input of GnuTLS.
    `(("gnutls" ,gnutls)))
   (synopsis "Simple Authentication and Security Layer library")
   (description
    "GNU SASL is an implementation of the Simple Authentication and
Security Layer framework.  On network servers such as IMAP or SMTP servers,
SASL is used to handle client/server authentication.  This package contains
both a library and a command-line tool to access the library.")
   (license license:gpl3+)
   (home-page "https://www.gnu.org/software/gsasl/")))
n263' href='#n263'>263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632
;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021 Ludovic Courtès <ludo@gnu.org>
;;; Copyright © 2015 Mark H Weaver <mhw@netris.org>
;;; Copyright © 2016 Andreas Enge <andreas@enge.fr>
;;; Copyright © 2017 Marius Bakke <mbakke@fastmail.com>
;;; Copyright © 2017, 2019 Tobias Geerinckx-Rice <me@tobias.gr>
;;; Copyright © 2020 Florian Pelz <pelzflorian@pelzflorian.de>
;;; Copyright © 2020 Efraim Flashner <efraim@flashner.co.il>
;;;
;;; This file is part of GNU Guix.
;;;
;;; GNU Guix is free software; you can redistribute it and/or modify it
;;; under the terms of the GNU General Public License as published by
;;; the Free Software Foundation; either version 3 of the License, or (at
;;; your option) any later version.
;;;
;;; GNU Guix is distributed in the hope that it will be useful, but
;;; WITHOUT ANY WARRANTY; without even the implied warranty of
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
;;; GNU General Public License for more details.
;;;
;;; You should have received a copy of the GNU General Public License
;;; along with GNU Guix.  If not, see <http://www.gnu.org/licenses/>.

(define-module (gnu system install)
  #:use-module (gnu)
  #:use-module (gnu system)
  #:use-module (gnu bootloader u-boot)
  #:use-module (guix gexp)
  #:use-module (guix store)
  #:use-module (guix monads)
  #:use-module (guix modules)
  #:use-module ((guix packages) #:select (package-version))
  #:use-module ((guix store) #:select (%store-prefix))
  #:use-module (gnu installer)
  #:use-module (gnu system locale)
  #:use-module (gnu services avahi)
  #:use-module (gnu services dbus)
  #:use-module (gnu services networking)
  #:use-module (gnu services shepherd)
  #:use-module (gnu services ssh)
  #:use-module (gnu packages admin)
  #:use-module (gnu packages bash)
  #:use-module (gnu packages bootloaders)
  #:use-module (gnu packages certs)
  #:use-module (gnu packages compression)
  #:use-module (gnu packages fonts)
  #:use-module (gnu packages fontutils)
  #:use-module (gnu packages guile)
  #:use-module (gnu packages linux)
  #:use-module (gnu packages package-management)
  #:use-module (gnu packages texinfo)
  #:use-module (gnu packages xorg)
  #:use-module (ice-9 match)
  #:use-module (srfi srfi-26)
  #:export (installation-os
            a20-olinuxino-lime-installation-os
            a20-olinuxino-lime2-emmc-installation-os
            a20-olinuxino-micro-installation-os
            bananapi-m2-ultra-installation-os
            beaglebone-black-installation-os
            mx6cuboxi-installation-os
            nintendo-nes-classic-edition-installation-os
            novena-installation-os
            firefly-rk3399-installation-os
            pine64-plus-installation-os
            pinebook-installation-os
            rock64-installation-os
            rockpro64-installation-os
            rk3399-puma-installation-os
            wandboard-installation-os
            os-with-u-boot))

;;; Commentary:
;;;
;;; This module provides an 'operating-system' definition for use on images
;;; for USB sticks etc., for the installation of the GNU system.
;;;
;;; Code:


;;;
;;; Documentation service.
;;;

(define %installation-node-names
  ;; Translated name of the "System Installation" node of the manual.  Ideally
  ;; we'd extract it from the 'guix-manual' gettext domain, but that one is
  ;; usually not available at run time, hence this hack.
  '(("de" . "Systeminstallation")
    ("en" . "System Installation")
    ("es" . "Instalación del sistema")
    ("fr" . "Installation du système")
    ("ru" . "Установка системы")))

(define (log-to-info tty user)
  "Return a script that spawns the Info reader on the right section of the
manual."
  (program-file "log-to-info"
                #~(let* ((tty      (open-file #$(string-append "/dev/" tty)
                                              "r0+"))
                         (locale   (cadr (command-line)))
                         (language (string-take locale
                                                (string-index locale #\_)))
                         (infodir  "/run/current-system/profile/share/info")
                         (per-lang (string-append infodir "/guix." language
                                                  ".info.gz"))
                         (file     (if (file-exists? per-lang)
                                       per-lang
                                       (string-append infodir "/guix.info")))
                         (node     (or (assoc-ref '#$%installation-node-names
                                                  language)
                                       "System Installation")))
                    (redirect-port tty (current-output-port))
                    (redirect-port tty (current-error-port))
                    (redirect-port tty (current-input-port))

                    (let ((pw (getpwnam #$user)))
                      (setgid (passwd:gid pw))
                      (setuid (passwd:uid pw)))

                    ;; 'gunzip' is needed to decompress the doc.
                    (setenv "PATH" (string-append #$gzip "/bin"))

                    ;; Change this process' locale so that command-line
                    ;; arguments to 'info' are properly encoded.
                    (catch #t
                      (lambda ()
                        (setlocale LC_ALL locale)
                        (setenv "LC_ALL" locale))
                      (lambda _
                        ;; Sometimes LOCALE itself is not available.  In that
                        ;; case pick the one UTF-8 locale that's known to work
                        ;; instead of failing.
                        (setlocale LC_ALL "en_US.utf8")
                        (setenv "LC_ALL" "en_US.utf8")))

                    (execl #$(file-append info-reader "/bin/info")
                           "info" "-d" infodir "-f" file "-n" node))))

(define (documentation-shepherd-service tty)
  (list (shepherd-service
         (provision (list (symbol-append 'term- (string->symbol tty))))
         (requirement '(user-processes host-name udev virtual-terminal))
         (start #~(lambda* (#:optional (locale "en_US.utf8"))
                    (fork+exec-command
                     (list #$(log-to-info tty "documentation") locale)
                     #:environment-variables
                     `("GUIX_LOCPATH=/run/current-system/locale"
                       "TERM=linux"))))
         (stop #~(make-kill-destructor)))))

(define %documentation-users
  ;; User account for the Info viewer.
  (list (user-account (name "documentation")
                      (system? #t)
                      (group "nogroup")
                      (home-directory "/var/empty"))))

(define documentation-service-type
  ;; Documentation viewer service.
  (service-type (name 'documentation)
                (extensions
                 (list (service-extension shepherd-root-service-type
                                          documentation-shepherd-service)
                       (service-extension account-service-type
                                          (const %documentation-users))))
                (description "Run the Info reader on a tty.")))


(define %backing-directory
  ;; Sub-directory used as the backing store for copy-on-write.
  "/tmp/guix-inst")

(define cow-store-service-type
  (shepherd-service-type
   'cow-store
   (lambda _
     (define (import-module? module)
       ;; Since we don't use deduplication support in 'populate-store', don't
       ;; import (guix store deduplication) and its dependencies, which
       ;; includes Guile-Gcrypt.
       (and (guix-module-name? module)
            (not (equal? module '(guix store deduplication)))))

     (shepherd-service
      (requirement '(root-file-system user-processes))
      (provision '(cow-store))
      (documentation
       "Make the store copy-on-write, with writes going to \
the given target.")

      ;; This is meant to be explicitly started by the user.
      (auto-start? #f)

      (modules `((gnu build install)
                 ,@%default-modules))
      (start
       (with-imported-modules (source-module-closure
                               '((gnu build install))
                               #:select? import-module?)
         #~(case-lambda
             ((target)
              (mount-cow-store target #$%backing-directory)
              target)
             (else
              ;; Do nothing, and mark the service as stopped.
              #f))))
      (stop #~(lambda (target)
                ;; Delete the temporary directory, but leave everything
                ;; mounted as there may still be processes using it since
                ;; 'user-processes' doesn't depend on us.  The 'user-file-systems'
                ;; service will unmount TARGET eventually.
                (delete-file-recursively
                 (string-append target #$%backing-directory))))))
   (description "Make the store copy-on-write, with writes going to \
the given target.")))

(define (cow-store-service)
  "Return a service that makes the store copy-on-write, such that writes go to
the user's target storage device rather than on the RAM disk."
  ;; See <http://bugs.gnu.org/18061> for the initial report.
  (service cow-store-service-type 'mooooh!))


(define (/etc/configuration-files _)
  "Return a list of tuples representing configuration templates to add to
/etc."
  (define directory
    (computed-file "configuration-templates"
                   (with-imported-modules '((guix build utils))
                     #~(begin
                         (mkdir #$output)
                         (for-each (lambda (file target)
                                     (copy-file file
                                                (string-append #$output "/"
                                                               target)))
                                   '(#$(local-file "examples/bare-bones.tmpl")
                                     #$(local-file "examples/beaglebone-black.tmpl")
                                     #$(local-file "examples/desktop.tmpl")
                                     #$(local-file "examples/lightweight-desktop.tmpl"))
                                   '("bare-bones.scm"
                                     "beaglebone-black.scm"
                                     "desktop.scm"
                                     "lightweight-desktop.scm"))
                         #t))))

  `(("configuration" ,directory)))

(define configuration-template-service-type
  (service-type (name 'configuration-template)
                (extensions
                 (list (service-extension etc-service-type
                                          /etc/configuration-files)))))

(define %configuration-template-service
  (service configuration-template-service-type #t))


(define %nscd-minimal-caches
  ;; Minimal in-memory caching policy for nscd.
  (list (nscd-cache (database 'hosts)
                    (positive-time-to-live (* 3600 12))

                    ;; Do not cache lookup failures at all since they are
                    ;; quite likely (for instance when someone tries to ping a
                    ;; host before networking is functional.)
                    (negative-time-to-live 0)

                    (persistent? #f)
                    (max-database-size (* 5 (expt 2 20)))))) ;5 MiB


;; These define a service to load the uvesafb kernel module with the
;; appropriate options.  The GUI installer needs it when the machine does not
;; support Kernel Mode Setting.  Otherwise kmscon is missing /dev/fb0.
(define (uvesafb-shepherd-service _)
  (list (shepherd-service
         (documentation "Load the uvesafb kernel module if needed.")
         (provision '(maybe-uvesafb))
         (requirement '(file-systems))
         (start #~(lambda ()
                    ;; uvesafb is only supported on x86 and x86_64.
                    (or (not (and (string-suffix? "linux-gnu" %host-type)
                                  (or (string-prefix? "x86_64" %host-type)
                                      (string-prefix? "i686" %host-type))))
                        (file-exists? "/dev/fb0")
                        (invoke #+(file-append kmod "/bin/modprobe")
                                "uvesafb"
                                (string-append "v86d=" #$v86d "/sbin/v86d")
                                "mode_option=1024x768"))))
         (respawn? #f)
         (one-shot? #t))))

(define uvesafb-service-type
  (service-type
   (name 'uvesafb)
   (extensions
    (list (service-extension shepherd-root-service-type
                             uvesafb-shepherd-service)))
   (description
    "Load the @code{uvesafb} kernel module with the right options.")
   (default-value #t)))

(define %installation-services
  ;; List of services of the installation system.
  (let ((motd (plain-file "motd" "
\x1b[1;37mWelcome to the installation of GNU Guix!\x1b[0m

\x1b[2m\
Using this shell, you can carry out the installation process \"manually.\"
Access documentation at any time by pressing Alt-F2.\x1b[0m
")))
    (define (normal-tty tty)
      (mingetty-service (mingetty-configuration (tty tty)
                                                (auto-login "root")
                                                (login-pause? #t))))

    (define bare-bones-os
      (load "examples/bare-bones.tmpl"))

    (list (service virtual-terminal-service-type)

          (service kmscon-service-type
                   (kmscon-configuration
                    (virtual-terminal "tty1")
                    (login-program (installer-program))))

          (login-service (login-configuration
                          (motd motd)))

          ;; Documentation.  The manual is in UTF-8, but
          ;; 'console-font-service' sets up Unicode support and loads a font
          ;; with all the useful glyphs like em dash and quotation marks.
          (service documentation-service-type "tty2")

          ;; Documentation add-on.
          %configuration-template-service

          ;; A bunch of 'root' ttys.
          (normal-tty "tty3")
          (normal-tty "tty4")
          (normal-tty "tty5")
          (normal-tty "tty6")

          ;; The usual services.
          (syslog-service)

          ;; Use the Avahi daemon to discover substitute servers on the local
          ;; network.  It can be faster than fetching from remote servers.
          (service avahi-service-type)

          ;; The build daemon.  Register the default substitute server key(s)
          ;; as trusted to allow the installation process to use substitutes by
          ;; default.
          (service guix-service-type
                   (guix-configuration (authorize-key? #t)))

          ;; Start udev so that useful device nodes are available.
          ;; Use device-mapper rules for cryptsetup & co; enable the CRDA for
          ;; regulations-compliant WiFi access.
          (udev-service #:rules (list lvm2 crda))

          ;; Add the 'cow-store' service, which users have to start manually
          ;; since it takes the installation directory as an argument.
          (cow-store-service)

          ;; Install Unicode support and a suitable font.
          (service console-font-service-type
                   (map (match-lambda
                          ("tty2"
                           ;; Use a font that contains characters such as
                           ;; curly quotes as found in the manual.
                           '("tty2" . "LatGrkCyr-8x16"))
                          (tty
                           ;; Use a font that doesn't have more than 256
                           ;; glyphs so that we can use colors with varying
                           ;; brightness levels (see note in setfont(8)).
                           `(,tty . "lat9u-16")))
                        '("tty1" "tty2" "tty3" "tty4" "tty5" "tty6")))

          ;; To facilitate copy/paste.
          (service gpm-service-type)

          ;; Add an SSH server to facilitate remote installs.
          (service openssh-service-type
                   (openssh-configuration
                    (port-number 22)
                    (permit-root-login #t)
                    ;; The root account is passwordless, so make sure
                    ;; a password is set before allowing logins.
                    (allow-empty-passwords? #f)
                    (password-authentication? #t)

                    ;; Don't start it upfront.
                    (%auto-start? #f)))

          ;; Since this is running on a USB stick with a overlayfs as the root
          ;; file system, use an appropriate cache configuration.
          (nscd-service (nscd-configuration
                         (caches %nscd-minimal-caches)))

          ;; Having /bin/sh is a good idea.  In particular it allows Tramp
          ;; connections to this system to work.
          (service special-files-service-type
                   `(("/bin/sh" ,(file-append bash "/bin/sh"))))

          ;; Loopback device, needed by OpenSSH notably.
          (service static-networking-service-type
                   (list (static-networking (interface "lo")
                                            (ip "127.0.0.1")
                                            (requirement '())
                                            (provision '(loopback)))))

          (service wpa-supplicant-service-type)
          (dbus-service)
          (service connman-service-type
                   (connman-configuration
                    (disable-vpn? #t)))

          ;; Keep a reference to BARE-BONES-OS to make sure it can be
          ;; installed without downloading/building anything.  Also keep the
          ;; things needed by 'profile-derivation' to minimize the amount of
          ;; download.
          (service gc-root-service-type
                   (append
                    (list bare-bones-os
                          glibc-utf8-locales
                          texinfo
                          guile-3.0)
                    %default-locale-libcs))

          ;; Machines without Kernel Mode Setting (those with many old and
          ;; current AMD GPUs, SiS GPUs, ...) need uvesafb to show the GUI
          ;; installer.  Some may also need a kernel parameter like nomodeset
          ;; or vga=793, but we leave that for the user to specify in GRUB.
          (service uvesafb-service-type))))

(define %issue
  ;; Greeting.
  "
\x1b[1;37mThis is an installation image of the GNU system.  Welcome.\x1b[0m

\x1b[1;33mUse Alt-F2 for documentation.\x1b[0m
")

(define installation-os
  ;; The operating system used on installation images for USB sticks etc.
  (operating-system
    (host-name "gnu")
    (timezone "Europe/Paris")
    (locale "en_US.utf8")
    (name-service-switch %mdns-host-lookup-nss)
    (bootloader (bootloader-configuration
                 (bootloader grub-bootloader)
                 (target "/dev/sda")))
    (label (string-append "GNU Guix installation "
                          (package-version guix)))

    ;; XXX: The AMD Radeon driver is reportedly broken, which makes kmscon
    ;; non-functional:
    ;; <https://lists.gnu.org/archive/html/guix-devel/2019-03/msg00441.html>.
    ;; Thus, blacklist it.
    (kernel-arguments '("quiet" "modprobe.blacklist=radeon"))

    (file-systems
     ;; Note: the disk image build code overrides this root file system with
     ;; the appropriate one.
     (cons* (file-system
              (mount-point "/")
              (device (file-system-label "Guix_image"))
              (type "ext4"))

            ;; Make /tmp a tmpfs instead of keeping the overlayfs.  This
            ;; originally was used for unionfs because FUSE creates
            ;; '.fuse_hiddenXYZ' files for each open file, and this confuses
            ;; Guix's test suite, for instance (see
            ;; <http://bugs.gnu.org/23056>).  We keep this for overlayfs to be
            ;; on the safe side.
            (file-system
              (mount-point "/tmp")
              (device "none")
              (type "tmpfs")
              (check? #f))

            ;; XXX: This should be %BASE-FILE-SYSTEMS but we don't need
            ;; elogind's cgroup file systems.
            (list %pseudo-terminal-file-system
                  %shared-memory-file-system
                  %efivars-file-system
                  %immutable-store)))

    (users (list (user-account
                  (name "guest")
                  (group "users")
                  (supplementary-groups '("wheel")) ; allow use of sudo
                  (password "")
                  (comment "Guest of GNU"))))

    (issue %issue)
    (services %installation-services)

    ;; We don't need setuid programs, except for 'passwd', which can be handy
    ;; if one is to allow remote SSH login to the machine being installed.
    (setuid-programs (list (file-append shadow "/bin/passwd")))

    (pam-services
     ;; Explicitly allow for empty passwords.
     (base-pam-services #:allow-empty-passwords? #t))

    (packages (append
                (list glibc         ; for 'tzselect' & co.
                      fontconfig
                      font-dejavu font-gnu-unifont
                      grub          ; mostly so xrefs to its manual work
                      nss-certs)    ; To access HTTPS, use git, etc.
                %base-packages-disk-utilities
                %base-packages))))

(define* (os-with-u-boot os board #:key (bootloader-target "/dev/mmcblk0")
                         (triplet "arm-linux-gnueabihf"))
  "Given OS, amend it with the u-boot bootloader for BOARD,
installed to BOOTLOADER-TARGET (a drive), compiled for TRIPLET.

If you want a serial console, make sure to specify one in your
operating-system's kernel-arguments (\"console=ttyS0\" or similar)."
  (operating-system (inherit os)
    (bootloader (bootloader-configuration
                 (bootloader (bootloader (inherit u-boot-bootloader)
                              (package (make-u-boot-package board triplet))))
                 (target bootloader-target)))))

(define* (embedded-installation-os bootloader bootloader-target tty
                                   #:key (extra-modules '()))
  "Return an installation os for embedded systems.
The initrd gets the extra modules EXTRA-MODULES.
A getty is provided on TTY.
The bootloader BOOTLOADER is installed to BOOTLOADER-TARGET."
  (operating-system
    (inherit installation-os)
    (bootloader (bootloader-configuration
                 (bootloader bootloader)
                 (target bootloader-target)))
    (kernel linux-libre)
    (kernel-arguments
     (cons (string-append "console=" tty)
           (operating-system-user-kernel-arguments installation-os)))
    (initrd-modules (append extra-modules %base-initrd-modules))))

(define beaglebone-black-installation-os
  (embedded-installation-os u-boot-beaglebone-black-bootloader
                            "/dev/sda"
                            "ttyO0"
                            #:extra-modules
                            ;; This module is required to mount the sd card.
                            '("omap_hsmmc")))


(define a20-olinuxino-lime-installation-os
  (embedded-installation-os u-boot-a20-olinuxino-lime-bootloader
                            "/dev/mmcblk0" ; SD card storage
                            "ttyS0"))

(define a20-olinuxino-lime2-emmc-installation-os
  (embedded-installation-os u-boot-a20-olinuxino-lime2-bootloader
                            "/dev/mmcblk1" ; eMMC storage
                            "ttyS0"))

(define a20-olinuxino-micro-installation-os
  (embedded-installation-os u-boot-a20-olinuxino-micro-bootloader
                            "/dev/mmcblk0" ; SD card storage
                            "ttyS0"))

(define bananapi-m2-ultra-installation-os
  (embedded-installation-os u-boot-bananapi-m2-ultra-bootloader
                            "/dev/mmcblk1" ; eMMC storage
                            "ttyS0"))

(define firefly-rk3399-installation-os
  (embedded-installation-os u-boot-firefly-rk3399-bootloader
                            "/dev/mmcblk0" ; SD card/eMMC (SD priority) storage
                            "ttyS2")) ; UART2 connected on the Pi2 bus

(define mx6cuboxi-installation-os
  (embedded-installation-os u-boot-mx6cuboxi-bootloader
                            "/dev/mmcblk0" ; SD card storage
                            "ttymxc0"))

(define novena-installation-os
  (embedded-installation-os u-boot-novena-bootloader
                            "/dev/mmcblk1" ; SD card storage
                            "ttymxc1"))

(define nintendo-nes-classic-edition-installation-os
  (embedded-installation-os u-boot-nintendo-nes-classic-edition-bootloader
                            "/dev/mmcblk0" ; SD card (solder it yourself)
                            "ttyS0"))

(define pine64-plus-installation-os
  (embedded-installation-os u-boot-pine64-plus-bootloader
                            "/dev/mmcblk0" ; SD card storage
                            "ttyS0"))

(define pinebook-installation-os
  (embedded-installation-os u-boot-pinebook-bootloader
                            "/dev/mmcblk0" ; SD card storage
                            "ttyS0"))

(define rock64-installation-os
  (embedded-installation-os u-boot-rock64-rk3328-bootloader
                            "/dev/mmcblk0" ; SD card/eMMC (SD priority) storage
                            "ttyS2")) ; UART2 connected on the Pi2 bus

(define rockpro64-installation-os
  (embedded-installation-os u-boot-rockpro64-rk3399-bootloader
                            "/dev/mmcblk0" ; SD card/eMMC (SD priority) storage
                            "ttyS2")) ; UART2 connected on the Pi2 bus

(define rk3399-puma-installation-os
  (embedded-installation-os u-boot-puma-rk3399-bootloader
                            "/dev/mmcblk0" ; SD card storage
                            "ttyS0"))

(define wandboard-installation-os
  (embedded-installation-os u-boot-wandboard-bootloader
                            "/dev/mmcblk0" ; SD card storage
                            "ttymxc0"))

;; Return the default os here so 'guix system' can consume it directly.
installation-os

;;; install.scm ends here