installer: Add dialog to select networking services.

* gnu/installer/newt/services.scm (run-networking-cbt-page): New procedure.
(run-services-page): Call it.
* gnu/installer/services.scm (%system-services): Add OpenSSH and Tor.
(networking-system-service?): New procedure.
* gnu/installer/steps.scm (format-configuration): Add 'networking' and
'ssh' to the service modules.

gnu/installer/newt/services.scm

@@ -1,5 +1,6 @@
 ;;; GNU Guix --- Functional package management for GNU
 ;;; Copyright © 2018 Mathieu Othacehe <m.othacehe@gmail.com>
+;;; Copyright © 2019 Ludovic Courtès <ludo@gnu.org>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -44,5 +45,21 @@ choose the one to use on the log-in screen.")
       (condition
        (&installer-step-abort))))))
 
+(define (run-networking-cbt-page)
+  "Run a page allowing the user to select networking services."
+  (run-checkbox-tree-page
+   #:info-text (G_ "You can now select networking services to run on your
+system.")
+   #:title (G_ "Network service")
+   #:items (filter networking-system-service? %system-services)
+   #:item->text system-service-name
+   #:checkbox-tree-height 5
+   #:exit-button-callback-procedure
+   (lambda ()
+     (raise
+      (condition
+       (&installer-step-abort))))))
+
 (define (run-services-page)
-  (run-desktop-environments-cbt-page))
+  (append (run-desktop-environments-cbt-page)
+          (run-networking-cbt-page)))

gnu/installer/services.scm

@@ -26,6 +26,7 @@
             system-service-snippet
 
             desktop-system-service?
+            networking-system-service?
 
             %system-services
             system-services->configuration))
@@ -34,7 +35,7 @@
   system-service make-system-service
   system-service?
   (name            system-service-name)           ;string
-  (type            system-service-type)           ;symbol
+  (type            system-service-type)           ;'desktop | 'networking
   (snippet         system-service-snippet))       ;sexp
 
 ;; This is the list of desktop environments supported as services.
@@ -58,12 +59,26 @@
       (snippet '(service mate-desktop-service-type)))
      (desktop-environment
       (name "Enlightenment")
-      (snippet '(service enlightenment-desktop-service-type))))))
+      (snippet '(service enlightenment-desktop-service-type)))
+
+     ;; Networking.
+     (system-service
+      (name "OpenSSH secure shell daemon (sshd)")
+      (type 'networking)
+      (snippet '(service openssh-service-type)))
+     (system-service
+      (name "Tor anonymous network router")
+      (type 'networking)
+      (snippet '(service tor-service-type))))))
 
 (define (desktop-system-service? service)
   "Return true if SERVICE is a desktop environment service."
   (eq? 'desktop (system-service-type service)))
 
+(define (networking-system-service? service)
+  "Return true if SERVICE is a desktop environment service."
+  (eq? 'networking (system-service-type service)))
+
 (define (system-services->configuration services)
   "Return the configuration field for SERVICES."
   (let* ((snippets (map system-service-snippet services))

gnu/installer/steps.scm

@@ -215,7 +215,7 @@ found in RESULTS."
                   '())))
           steps))
         (modules '((use-modules (gnu))
-                   (use-service-modules desktop))))
+                   (use-service-modules desktop networking ssh))))
     `(,@modules
       ()
       (operating-system ,@configuration))))