installer: Add services page.

Add a page to select services, for now only desktop environments choice is
available.

* gnu/installer.scm (steps): Add services step.
* gnu/installer/newt.scm (newt-installer): Add services-page field.
* gnu/installer/newt/services.scm: New file.
* gnu/installer/record.scm (installer): Add services-page field.
* gnu/installer/services.scm: New file.
* gnu/local.mk (GNU_SYSTEM_MODULES): Add new files.
* po/guix/POTFILES.in: Add new files.

1 files changed, 48 insertions, 0 deletions

diff --git a/gnu/installer/newt/services.scm b/gnu/installer/newt/services.scm
new file mode 100644
index 0000000000..80fac43dc8
--- /dev/null
+++ b/gnu/installer/newt/services.scm
@@ -0,0 +1,48 @@
+;;; 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 services)
+  #:use-module (gnu installer services)
+  #:use-module (gnu installer steps)
+  #: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-services-page))
+
+(define (run-desktop-environments-cbt-page)
+  "Run a page allowing the user to choose between various desktop
+environments."
+  (run-checkbox-tree-page
+   #:info-text (G_ "Please select the desktop(s) environment(s) you wish to \
+install. If you select multiple desktops environments, we will be able to \
+choose the one to use on the log-in screen with F1.")
+   #:title (G_ "Desktop environment")
+   #:items %desktop-environments
+   #:item->text desktop-environment-name
+   #:checkbox-tree-height 5
+   #:cancel-button-callback-procedure
+   (lambda ()
+     (raise
+      (condition
+       (&installer-step-abort))))))
+
+(define (run-services-page)
+  (run-desktop-environments-cbt-page))