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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 newt final)
+  #:use-module (gnu installer final)
+  #:use-module (gnu installer parted)
+  #:use-module (gnu installer steps)
+  #:use-module (gnu installer utils)
+  #:use-module (gnu installer newt page)
+  #:use-module (gnu installer newt utils)
+  #:use-module (guix i18n)
+  #:use-module (srfi srfi-34)
+  #:use-module (srfi srfi-35)
+  #:use-module (newt)
+  #:export (run-final-page))
+
+(define (run-config-display-page)
+  (let ((width (%configuration-file-width))
+        (height (nearest-exact-integer
+                 (/ (screen-rows) 2))))
+    (run-file-textbox-page
+     #:info-text (G_ "Congratulations, the installation is almost over! A \
+system configuration file has been generated, it is displayed just below. The \
+new system will be created from this file when pression the Ok button.")
+     #:title (G_ "Configuration file")
+     #:file (%installer-configuration-file)
+     #:info-textbox-width width
+     #:file-textbox-width width
+     #:file-textbox-height height
+     #:cancel-button-callback-procedure
+     (lambda ()
+       (raise
+        (condition
+         (&installer-step-abort)))))))
+
+(define (run-install-success-page)
+  (message-window
+   (G_ "Installation complete")
+   (G_ "Reboot")
+   (G_ "The installation finished with success. You may now remove the device \
+with the installation image and press the button to reboot.")))
+
+(define (run-install-failed-page)
+  (choice-window
+   (G_ "Installation failed")
+   (G_ "Restart installer")
+   (G_ "Retry system install")
+   (G_ "The final system installation step failed. You can retry the \
+last step, or restart the installer.")))
+
+(define (run-install-shell)
+  (clear-screen)
+  (newt-suspend)
+  (let ((install-ok? (install-system)))
+    (newt-resume)
+    install-ok?))
+
+(define (run-final-page result prev-steps)
+  (let* ((configuration (format-configuration prev-steps result))
+         (user-partitions (result-step result 'partition))
+         (install-ok?
+          (with-mounted-partitions
+           user-partitions
+           (configuration->file configuration)
+           (run-config-display-page)
+           (run-install-shell))))
+    (if install-ok?
+        (run-install-success-page)
+        (run-install-failed-page))))