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-rw-r--r--gnu/installer/utils.scm38
1 files changed, 34 insertions, 4 deletions
diff --git a/gnu/installer/utils.scm b/gnu/installer/utils.scm
index e91f90a84d..ddb96bc338 100644
--- a/gnu/installer/utils.scm
+++ b/gnu/installer/utils.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.
 ;;;
@@ -19,6 +20,8 @@
 (define-module (gnu installer utils)
   #:use-module (guix utils)
   #:use-module (guix build utils)
+  #:use-module (guix i18n)
+  #:use-module (srfi srfi-34)
   #:use-module (ice-9 rdelim)
   #:use-module (ice-9 regex)
   #:use-module (ice-9 textual-ports)
@@ -54,10 +57,37 @@ number. If no percentage is found, return #f"
     (and result
          (string->number (match:substring result 1)))))
 
-(define (run-shell-command command)
+(define* (run-shell-command command #:key locale)
+  "Run COMMAND, a string, with Bash, and in the given LOCALE.  Return true if
+COMMAND exited successfully, #f otherwise."
+  (define (pause)
+    (format #t (G_ "Press Enter to continue.~%"))
+    (read-line (current-input-port)))
+
   (call-with-temporary-output-file
    (lambda (file port)
-     (format port "~a~%" command)
-     ;; (format port "exit~%")
+     (when locale
+       (let ((supported? (false-if-exception
+                          (setlocale LC_ALL locale))))
+         ;; If LOCALE is not supported, then set LANGUAGE, which might at
+         ;; least give us translated messages.
+         (if supported?
+             (format port "export LC_ALL=\"~a\"~%" locale)
+             (format port "export LANGUAGE=\"~a\"~%"
+                     (string-take locale
+                                  (string-index locale #\_))))))
+
+     (format port "exec ~a~%" command)
      (close port)
-     (invoke "bash" "--init-file" file))))
+
+     (guard (c ((invoke-error? c)
+                (newline)
+                (format (current-error-port)
+                        (G_ "Command failed with exit code ~a.~%")
+                        (invoke-error-exit-status c))
+                (pause)
+                #f))
+       (invoke "bash" "--init-file" file)
+       (newline)
+       (pause)
+       #t))))