installer: Add configuration formatter.

* gnu/installer.scm (installer-steps): Add configuration-formatter procedures.
* gnu/installer/final.scm: New file.
* gnu/installer/locale.scm (locale->configuration): New exported procedure.
* gnu/installer/newt.scm (newt-installer): Add final page.
* gnu/installer/newt/final.scm: New file.
* gnu/installer/record.scm (installer): Add final-page field.
* gnu/installer/timezone.scm (posix-tz->configuration): New exported
procedure.
* gnu/installer/steps.scm (installer-step): Rename configuration-proc field to
configuration-formatter.
(%installer-configuration-file): New exported parameter,
(%installer-target-dir): ditto,
(%configuration-file-width): ditto,
(format-configuration): new exported procedure,
(configuration->file): new exported procedure.

1 files changed, 36 insertions, 0 deletions

diff --git a/gnu/installer/final.scm b/gnu/installer/final.scm
new file mode 100644
index 0000000000..e1c62f5ce0
--- /dev/null
+++ b/gnu/installer/final.scm
@@ -0,0 +1,36 @@
+;;; 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 final)
+  #:use-module (gnu installer newt page)
+  #:use-module (gnu installer steps)
+  #:use-module (gnu installer utils)
+  #:use-module (gnu services herd)
+  #:use-module (guix build utils)
+  #:export (install-system))
+
+(define (install-system)
+  "Start COW-STORE service on target directory and launch guix install command
+in a subshell."
+  (let ((install-command
+         (format #f "guix system init ~a ~a"
+                 (%installer-configuration-file)
+                 (%installer-target-dir))))
+    (mkdir-p (%installer-target-dir))
+    (start-service 'cow-store (list (%installer-target-dir)))
+    (false-if-exception (run-shell-command install-command))))