08/11: pull: '-l' displays channel news.

[guix-commits]

civodul pushed a commit to branch master
in repository guix.

commit 192ee02aeb3d2f6d14ea93cfc43b30dd93df80e8
Author: Ludovic Courtès <address@hidden>
Date:   Sun Sep 15 23:55:19 2019 +0200

    pull: '-l' displays channel news.
    
    * guix/scripts/pull.scm (display-channel-news): Make 'previous' a
    parameter.
    (process-query)[list-generations]: Call 'display-channel-news'.
---
 guix/scripts/pull.scm | 14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

diff --git a/guix/scripts/pull.scm b/guix/scripts/pull.scm
index d734df5..4a4756d 100644
--- a/guix/scripts/pull.scm
+++ b/guix/scripts/pull.scm
@@ -272,12 +272,12 @@ and NEW are <channel> records with a proper 'commit' 
field."
            (for-each (cut display-news-entry <> language port) entries)
            (newline port)))))))
 
-(define (display-channel-news profile)
-  "Display news about the channels of PROFILE "
-  (define previous
-    (and=> (relative-generation profile -1)
-           (cut generation-file-name profile <>)))
-
+(define* (display-channel-news profile
+                               #:optional
+                               (previous
+                                (and=> (relative-generation profile -1)
+                                       (cut generation-file-name profile <>))))
+  "Display news about the channels of PROFILE compared to PREVIOUS."
   (when previous
     (let ((old-channels (profile-channels previous))
           (new-channels (profile-channels profile)))
@@ -614,6 +614,8 @@ display long package lists that would fill the user's 
screen."
               ((first second rest ...)
                (display-profile-content-diff profile
                                              first second)
+               (display-channel-news (generation-file-name profile second)
+                                     (generation-file-name profile first))
                (loop (cons second rest)))
               ((_) #t)
               (()  #t))))))