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+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2018 Mathieu Othacehe <m.othacehe@gmail.com>
+;;;
+;;; 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 installer build-installer)
+ #:use-module (guix packages)
+ #:use-module (guix gexp)
+ #:use-module (guix modules)
+ #:use-module (guix utils)
+ #:use-module (guix ui)
+ #:use-module ((guix self) #:select (make-config.scm))
+ #:use-module (gnu installer)
+ #:use-module (gnu packages admin)
+ #:use-module (gnu packages base)
+ #:use-module (gnu packages bash)
+ #:use-module (gnu packages connman)
+ #:use-module (gnu packages guile)
+ #:autoload (gnu packages gnupg) (guile-gcrypt)
+ #:use-module (gnu packages iso-codes)
+ #:use-module (gnu packages linux)
+ #:use-module (gnu packages ncurses)
+ #:use-module (gnu packages package-management)
+ #:use-module (gnu packages xorg)
+ #:use-module (ice-9 match)
+ #:use-module (srfi srfi-1)
+ #:export (installer-program))
+
+(define not-config?
+ ;; Select (guix …) and (gnu …) modules, except (guix config).
+ (match-lambda
+ (('guix 'config) #f)
+ (('guix rest ...) #t)
+ (('gnu rest ...) #t)
+ (rest #f)))
+
+(define* (build-compiled-file name locale-builder)
+ "Return a file-like object that evalutes the gexp LOCALE-BUILDER and store
+its result in the scheme file NAME. The derivation will also build a compiled
+version of this file."
+ (define set-utf8-locale
+ #~(begin
+ (setenv "LOCPATH"
+ #$(file-append glibc-utf8-locales "/lib/locale/"
+ (version-major+minor
+ (package-version glibc-utf8-locales))))
+ (setlocale LC_ALL "en_US.utf8")))
+
+ (define builder
+ (with-extensions (list guile-json)
+ (with-imported-modules (source-module-closure
+ '((gnu installer locale)))
+ #~(begin
+ (use-modules (gnu installer locale))
+
+ ;; The locale files contain non-ASCII characters.
+ #$set-utf8-locale
+
+ (mkdir #$output)
+ (let ((locale-file
+ (string-append #$output "/" #$name ".scm"))
+ (locale-compiled-file
+ (string-append #$output "/" #$name ".go")))
+ (call-with-output-file locale-file
+ (lambda (port)
+ (write #$locale-builder port)))
+ (compile-file locale-file
+ #:output-file locale-compiled-file))))))
+ (computed-file name builder))
+
+(define apply-locale
+ ;; Install the specified locale.
+ #~(lambda (locale-name)
+ (false-if-exception
+ (setlocale LC_ALL locale-name))))
+
+(define* (compute-locale-step installer
+ #:key
+ locales-name
+ iso639-languages-name
+ iso3166-territories-name)
+ "Return a gexp that run the locale-page of INSTALLER, and install the
+selected locale. The list of locales, languages and territories passed to
+locale-page are computed in derivations named respectively LOCALES-NAME,
+ISO639-LANGUAGES-NAME and ISO3166-TERRITORIES-NAME. Those lists are compiled,
+so that when the installer is run, all the lengthy operations have already
+been performed at build time."
+ (define (compiled-file-loader file name)
+ #~(load-compiled
+ (string-append #$file "/" #$name ".go")))
+
+ (let* ((supported-locales #~(supported-locales->locales
+ #$(local-file "aux-files/SUPPORTED")))
+ (iso-codes #~(string-append #$iso-codes "/share/iso-codes/json/"))
+ (iso639-3 #~(string-append #$iso-codes "iso_639-3.json"))
+ (iso639-5 #~(string-append #$iso-codes "iso_639-5.json"))
+ (iso3166 #~(string-append #$iso-codes "iso_3166-1.json"))
+ (locales-file (build-compiled-file
+ locales-name
+ #~`(quote ,#$supported-locales)))
+ (iso639-file (build-compiled-file
+ iso639-languages-name
+ #~`(quote ,(iso639->iso639-languages
+ #$supported-locales
+ #$iso639-3 #$iso639-5))))
+ (iso3166-file (build-compiled-file
+ iso3166-territories-name
+ #~`(quote ,(iso3166->iso3166-territories #$iso3166))))
+ (locales-loader (compiled-file-loader locales-file
+ locales-name))
+ (iso639-loader (compiled-file-loader iso639-file
+ iso639-languages-name))
+ (iso3166-loader (compiled-file-loader iso3166-file
+ iso3166-territories-name)))
+ #~(let ((result
+ (#$(installer-locale-page installer)
+ #:supported-locales #$locales-loader
+ #:iso639-languages #$iso639-loader
+ #:iso3166-territories #$iso3166-loader)))
+ (#$apply-locale result))))
+
+(define apply-keymap
+ ;; Apply the specified keymap.
+ #~(match-lambda
+ ((model layout variant)
+ (kmscon-update-keymap model layout variant))))
+
+(define* (compute-keymap-step installer)
+ "Return a gexp that runs the keymap-page of INSTALLER and install the
+selected keymap."
+ #~(let ((result
+ (call-with-values
+ (lambda ()
+ (xkb-rules->models+layouts
+ (string-append #$xkeyboard-config
+ "/share/X11/xkb/rules/base.xml")))
+ (lambda (models layouts)
+ (#$(installer-keymap-page installer)
+ #:models models
+ #:layouts layouts)))))
+ (#$apply-keymap result)))
+
+(define (installer-steps installer)
+ (let ((locale-step (compute-locale-step
+ installer
+ #:locales-name "locales"
+ #:iso639-languages-name "iso639-languages"
+ #:iso3166-territories-name "iso3166-territories"))
+ (keymap-step (compute-keymap-step installer))
+ (timezone-data #~(string-append #$tzdata
+ "/share/zoneinfo/zone.tab")))
+ #~(list
+ ;; Welcome the user and ask him to choose between manual installation
+ ;; and graphical install.
+ (installer-step
+ (id 'welcome)
+ (compute (lambda _
+ #$(installer-welcome-page installer))))
+
+ ;; Ask the user to choose a locale among those supported by the glibc.
+ ;; Install the selected locale right away, so that the user may
+ ;; benefit from any available translation for the installer messages.
+ (installer-step
+ (id 'locale)
+ (description (G_ "Locale selection"))
+ (compute (lambda _
+ #$locale-step)))
+
+ ;; Ask the user to select a timezone under glibc format.
+ (installer-step
+ (id 'timezone)
+ (description (G_ "Timezone selection"))
+ (compute (lambda _
+ (#$(installer-timezone-page installer)
+ #$timezone-data))))
+
+ ;; The installer runs in a kmscon virtual terminal where loadkeys
+ ;; won't work. kmscon uses libxkbcommon as a backend for keyboard
+ ;; input. It is possible to update kmscon current keymap by sending it
+ ;; a keyboard model, layout and variant, in a somehow similar way as
+ ;; what is done with setxkbmap utility.
+ ;;
+ ;; So ask for a keyboard model, layout and variant to update the
+ ;; current kmscon keymap.
+ (installer-step
+ (id 'keymap)
+ (description (G_ "Keyboard mapping selection"))
+ (compute (lambda _
+ #$keymap-step)))
+
+ ;; Ask the user to input a hostname for the system.
+ (installer-step
+ (id 'hostname)
+ (description (G_ "Hostname selection"))
+ (compute (lambda _
+ #$(installer-hostname-page installer))))
+
+ ;; Provide an interface above connmanctl, so that the user can select
+ ;; a network susceptible to acces Internet.
+ (installer-step
+ (id 'network)
+ (description (G_ "Network selection"))
+ (compute (lambda _
+ #$(installer-network-page installer))))
+
+ ;; Prompt for users (name, group and home directory).
+ (installer-step
+ (id 'hostname)
+ (description (G_ "User selection"))
+ (compute (lambda _
+ #$(installer-user-page installer)))))))
+
+(define (installer-program installer)
+ "Return a file-like object that runs the given INSTALLER."
+ (define init-gettext
+ ;; Initialize gettext support, so that installer messages can be
+ ;; translated.
+ #~(begin
+ (bindtextdomain "guix" (string-append #$guix "/share/locale"))
+ (textdomain "guix")))
+
+ (define set-installer-path
+ ;; Add the specified binary to PATH for later use by the installer.
+ #~(let* ((inputs
+ '#$(append (list bash connman shadow)
+ (map canonical-package (list coreutils)))))
+ (with-output-to-port (%make-void-port "w")
+ (lambda ()
+ (set-path-environment-variable "PATH" '("bin" "sbin") inputs)))))
+
+ (define installer-builder
+ (with-extensions (list guile-gcrypt guile-newt guile-json)
+ (with-imported-modules `(,@(source-module-closure
+ `(,@(installer-modules installer)
+ (guix build utils))
+ #:select? not-config?)
+ ((guix config) => ,(make-config.scm)))
+ #~(begin
+ (use-modules (gnu installer keymap)
+ (gnu installer steps)
+ (gnu installer locale)
+ #$@(installer-modules installer)
+ (guix i18n)
+ (guix build utils)
+ (ice-9 match))
+
+ ;; Initialize gettext support so that installers can use
+ ;; (guix i18n) module.
+ #$init-gettext
+
+ ;; Add some binaries used by the installers to PATH.
+ #$set-installer-path
+
+ #$(installer-init installer)
+
+ (catch #t
+ (lambda ()
+ (run-installer-steps
+ #:rewind-strategy 'menu
+ #:menu-proc #$(installer-menu-page installer)
+ #:steps #$(installer-steps installer)))
+ (const #f)
+ (lambda (key . args)
+ (#$(installer-exit-error installer) key args)
+
+ ;; Be sure to call newt-finish, to restore the terminal into
+ ;; its original state before printing the error report.
+ (call-with-output-file "/tmp/error"
+ (lambda (port)
+ (display-backtrace (make-stack #t) port)
+ (print-exception port
+ (stack-ref (make-stack #t) 1)
+ key args)))
+ (primitive-exit 1)))
+ #$(installer-exit installer)))))
+
+ (program-file "installer" installer-builder))