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bug#27820: guix package -u: order of argument is significant

From: Ludovic Courtès
Subject: bug#27820: guix package -u: order of argument is significant
Date: Tue, 25 Jul 2017 23:11:11 +0200
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/25.2 (gnu/linux)

Mark H Weaver <address@hidden> skribis:

> I agree that this is quite confusing.  Perhaps we should issue a warning
> if the regexp begins with "-".
> Also, perhaps we should *always* require an argument after "-u", even if
> "-u" is at the end of the command line, failing otherwise.  Users would
> then learn to always pass an argument to "-u", and thus would be less
> likely to fall into this trap when adding more options after the "-u".

I’m in favor of the former:

diff --git a/guix/scripts/package.scm b/guix/scripts/package.scm
index 8da7a3fd3..b6133b6af 100644
--- a/guix/scripts/package.scm
+++ b/guix/scripts/package.scm
@@ -486,6 +486,11 @@ Install, remove, or upgrade packages in a single 
          (option '(#\u "upgrade") #f #t
                  (lambda (opt name arg result arg-handler)
+                   (when (string-prefix? "-" arg)
+                     (warning (G_ "upgrade regexp '~a' looks like a \
+command-line option~%")
+                              arg)
+                     (warning (G_ "is this intended?~%")))
                    (let arg-handler ((arg arg) (result result))
                      (values (alist-cons 'upgrade arg
                                          ;; Delete any prior "upgrade all"


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