diff options
Diffstat (limited to 'guix/channels.scm')
| -rw-r--r-- | guix/channels.scm | 36 |
1 files changed, 20 insertions, 16 deletions
diff --git a/guix/channels.scm b/guix/channels.scm index 70e2d7f07c..84c47fc0d0 100644 --- a/guix/channels.scm +++ b/guix/channels.scm @@ -246,25 +246,29 @@ This procedure implements a channel update policy meant to be used as a ('ancestor #t) ('self #t) (_ - (raise (apply make-compound-condition - (condition - (&message (message - (format #f (G_ "\ + (raise (make-compound-condition + (condition + (&message (message + (format #f (G_ "\ aborting update of channel '~a' to commit ~a, which is not a descendant of ~a") - (channel-name channel) - (channel-instance-commit instance) - start)))) - - ;; Don't show the hint when the user explicitly specified a - ;; commit in CHANNEL. - (if (channel-commit channel) - '() - (list (condition - (&fix-hint - (hint (G_ "This could indicate that the channel has + (channel-name channel) + (channel-instance-commit instance) + start)))) + + ;; If the user asked for a specific commit, they might want + ;; that to happen nevertheless, so tell them about the + ;; relevant 'guix pull' option. + (if (channel-commit channel) + (condition + (&fix-hint + (hint (G_ "Use @option{--allow-downgrades} to force +this downgrade.")))) + (condition + (&fix-hint + (hint (G_ "This could indicate that the channel has been tampered with and is trying to force a roll-back, preventing you from getting the latest updates. If you think this is not the case, explicitly -allow non-forward updates."))))))))))) +allow non-forward updates.")))))))))) (define* (latest-channel-instances store channels #:key |