channels: Provide a hint when the 'guix' channel is lacking.

Fixes <https://bugs.gnu.org/39043>.
Reported by Jesse Gibbons <jgibbons2357@gmail.com>.

* guix/channels.scm (channel-instance-derivations): Raise '&fix-hint'
condition in addition to the '&message' condition.
This commit is contained in:
Ludovic Courtès 2020-01-09 11:21:31 +01:00
parent bbd9063afc
commit f75243e17e
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1 changed files with 6 additions and 2 deletions

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@ -1,5 +1,5 @@
;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2018, 2019 Ludovic Courtès <ludo@gnu.org>
;;; Copyright © 2018, 2019, 2020 Ludovic Courtès <ludo@gnu.org>
;;; Copyright © 2018 Ricardo Wurmus <rekado@elephly.net>
;;; Copyright © 2019 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
;;;
@ -36,7 +36,8 @@
#:use-module (guix i18n)
#:use-module ((guix utils)
#:select (source-properties->location
&error-location))
&error-location
&fix-hint))
#:use-module (srfi srfi-1)
#:use-module (srfi srfi-2)
#:use-module (srfi srfi-9)
@ -457,6 +458,9 @@ INSTANCES."
(raise (apply make-compound-condition
(condition
(&message (message "'guix' channel is lacking")))
(condition
(&fix-hint (hint (G_ "Make sure your list of channels
contains one channel named @code{guix} providing the core of Guix."))))
(if loc
(list (condition (&error-location (location loc))))
'())))))