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-rw-r--r--gnu/installer/newt.scm5
-rw-r--r--gnu/installer/newt/substitutes.scm43
-rw-r--r--gnu/installer/proxy.scm6
-rw-r--r--gnu/installer/record.scm3
-rw-r--r--gnu/installer/substitutes.scm41
-rw-r--r--gnu/installer/utils.scm11
6 files changed, 103 insertions, 6 deletions
diff --git a/gnu/installer/newt.scm b/gnu/installer/newt.scm
index a1cbeca49a..4f7fc6f4dc 100644
--- a/gnu/installer/newt.scm
+++ b/gnu/installer/newt.scm
@@ -30,6 +30,7 @@
   #:use-module (gnu installer newt page)
   #:use-module (gnu installer newt partition)
   #:use-module (gnu installer newt services)
+  #:use-module (gnu installer newt substitutes)
   #:use-module (gnu installer newt timezone)
   #:use-module (gnu installer newt user)
   #:use-module (gnu installer newt utils)
@@ -101,6 +102,9 @@ problem. The backtrace is displayed below. Please report it by email to \
 (define (network-page)
   (run-network-page))
 
+(define (substitutes-page)
+  (run-substitutes-page))
+
 (define (hostname-page)
   (run-hostname-page))
 
@@ -130,6 +134,7 @@ problem. The backtrace is displayed below. Please report it by email to \
    (locale-page locale-page)
    (menu-page menu-page)
    (network-page network-page)
+   (substitutes-page substitutes-page)
    (timezone-page timezone-page)
    (hostname-page hostname-page)
    (user-page user-page)
diff --git a/gnu/installer/newt/substitutes.scm b/gnu/installer/newt/substitutes.scm
new file mode 100644
index 0000000000..938cb1a53b
--- /dev/null
+++ b/gnu/installer/newt/substitutes.scm
@@ -0,0 +1,43 @@
+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2020 Mathieu Othacehe <othacehe@gnu.org>
+;;;
+;;; 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 substitutes)
+  #:use-module (gnu installer substitutes)
+  #:use-module (gnu installer utils)
+  #:use-module (guix i18n)
+  #:use-module (newt)
+  #:use-module (ice-9 match)
+  #:export (run-substitutes-page))
+
+(define* (run-substitutes-page)
+  (match (current-clients)
+    (()
+     (case (choice-window
+            (G_ "Substitute server discovery.")
+            (G_ "Enable") (G_ "Disable")
+            (G_ " By turning this option on, you allow Guix to fetch \
+substitutes (pre-built binaries) during installation from servers \
+discovered on your local area network (LAN) in addition to the official \
+server.  This can increase download throughput.
+
+ There are no security risks: only genuine substitutes may be retrieved from \
+those servers.  However, eavesdroppers on your LAN may be able to see what \
+software you are installing."))
+       ((1) (enable-discovery))
+       ((2) (disable-discovery))))
+    (_ #f)))
diff --git a/gnu/installer/proxy.scm b/gnu/installer/proxy.scm
index befaf3ab0a..86c827294e 100644
--- a/gnu/installer/proxy.scm
+++ b/gnu/installer/proxy.scm
@@ -17,15 +17,11 @@
 ;;; along with GNU Guix.  If not, see <http://www.gnu.org/licenses/>.
 
 (define-module (gnu installer proxy)
+  #:use-module (gnu installer utils)
   #:use-module (gnu services herd)
   #:export (set-http-proxy
             clear-http-proxy))
 
-(define-syntax-rule (with-silent-shepherd exp ...)
-  (parameterize ((shepherd-message-port
-                  (%make-void-port "w")))
-    exp ...))
-
 (define (set-http-proxy proxy)
   (with-silent-shepherd
     (with-shepherd-action 'guix-daemon
diff --git a/gnu/installer/record.scm b/gnu/installer/record.scm
index 6ebd87f6a6..0b34318c45 100644
--- a/gnu/installer/record.scm
+++ b/gnu/installer/record.scm
@@ -33,6 +33,7 @@
             installer-locale-page
             installer-menu-page
             installer-network-page
+            installer-substitutes-page
             installer-timezone-page
             installer-hostname-page
             installer-user-page
@@ -73,6 +74,8 @@
   (menu-page installer-menu-page)
   ;; procedure void -> void
   (network-page installer-network-page)
+  ;; procedure void -> void
+  (substitutes-page installer-substitutes-page)
   ;; procedure (zonetab) -> posix-timezone
   (timezone-page installer-timezone-page)
   ;; procedure void -> void
diff --git a/gnu/installer/substitutes.scm b/gnu/installer/substitutes.scm
new file mode 100644
index 0000000000..c9a7418f89
--- /dev/null
+++ b/gnu/installer/substitutes.scm
@@ -0,0 +1,41 @@
+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2020 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 substitutes)
+  #:use-module (gnu installer utils)
+  #:use-module (gnu services herd)
+  #:export (enable-discovery
+            disable-discovery))
+
+(define (enable-discovery)
+  (with-silent-shepherd
+    (with-shepherd-action 'guix-daemon
+        ('discover "on")
+        result
+      result)))
+
+(define (disable-discovery)
+  (with-silent-shepherd
+    (with-shepherd-action 'guix-daemon
+        ('discover "off")
+        result
+      result)))
+
+;; Local Variables:
+;; eval: (put 'with-silent-shepherd 'scheme-indent-function 0)
+;; End:
diff --git a/gnu/installer/utils.scm b/gnu/installer/utils.scm
index a7fa66a199..bb97bc5560 100644
--- a/gnu/installer/utils.scm
+++ b/gnu/installer/utils.scm
@@ -18,6 +18,7 @@
 ;;; along with GNU Guix.  If not, see <http://www.gnu.org/licenses/>.
 
 (define-module (gnu installer utils)
+  #:use-module (gnu services herd)
   #:use-module (guix utils)
   #:use-module (guix build utils)
   #:use-module (guix i18n)
@@ -43,7 +44,9 @@
             with-server-socket
             current-server-socket
             current-clients
-            send-to-clients))
+            send-to-clients
+
+            with-silent-shepherd))
 
 (define* (read-lines #:optional (port (current-input-port)))
   "Read lines from PORT and return them as a list."
@@ -233,3 +236,9 @@ accepting socket."
 
   (current-clients (reverse remainder))
   exp)
+
+(define-syntax-rule (with-silent-shepherd exp ...)
+  "Evaluate EXP while discarding shepherd messages."
+  (parameterize ((shepherd-message-port
+                  (%make-void-port "w")))
+    exp ...))
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