181/197: installer: Make the install attempts counter global.

[Danny Milosavljevic]

dannym pushed a commit to branch wip-installer-2
in repository guix.

commit 4ca55c28e947a1aa60c8621067f59dfc51f137e7
Author: John Darrington <address@hidden>
Date:   Tue Feb 14 08:36:44 2017 +0100

    installer: Make the install attempts counter global.
    
    * gnu/system/installer/misc.scm (install-attempts): New variable.
    * gnu/system/installer/install.scm (install-page-key-handler): Use it
    to generate a unique directory name.
---
 gnu/system/installer/install.scm | 8 +++-----
 gnu/system/installer/misc.scm    | 3 +++
 2 files changed, 6 insertions(+), 5 deletions(-)

diff --git a/gnu/system/installer/install.scm b/gnu/system/installer/install.scm
index 592e49e..8e5deb1 100644
--- a/gnu/system/installer/install.scm
+++ b/gnu/system/installer/install.scm
@@ -102,12 +102,11 @@
       (force-reboot))
 
      ((buttons-key-matches-symbol? nav ch 'continue)
-      (let* ((attempt (page-datum page 'attempt))
-             (target (format #f "/target-~a" attempt))
-             (window-port (make-window-port config-window)))
+      (let ((target (format #f "/target-~a" install-attempts))
+            (window-port (make-window-port config-window)))
         (catch #t
                (lambda ()
-                 (page-set-datum! page 'attempt (1+ attempt))
+                 (set! install-attempts (1+ install-attempts))
                  (and
                   (fold
                    (lambda (x prev)
@@ -202,7 +201,6 @@
     (page-set-wwin! p pr)
     (page-set-datum! p 'navigation buttons)
     (page-set-datum! p 'config-window (inner config-window))
-    (page-set-datum! p 'attempt 0)
     (buttons-post buttons bwin)
     (refresh* (outer pr))
     (refresh* text-window)
diff --git a/gnu/system/installer/misc.scm b/gnu/system/installer/misc.scm
index f1d1ac7..f9dab42 100644
--- a/gnu/system/installer/misc.scm
+++ b/gnu/system/installer/misc.scm
@@ -29,6 +29,7 @@
   #:export (system-role)
   #:export (users)
   #:export (installer-texinfo-markup)
+  #:export (install-attempts)
   #:export (mount-points))
 
 (define livery-title 1)
@@ -76,3 +77,5 @@
 
 
 (define users '())
+
+(define install-attempts 0)