From mboxrd@z Thu Jan  1 00:00:00 1970
From: Ricardo Wurmus <rekado@elephly.net>
Subject: Re: =?utf-8?Q?What=E2=80=99s?= the weather like?
Date: Sun, 23 Jul 2017 13:02:00 +0200
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To: Ludovic =?utf-8?Q?Court=C3=A8s?= <ludo@gnu.org>
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Ricardo Wurmus <rekado@elephly.net> writes:

>> Now if one could pass a manifest or a system configuration to “guix
>> weather” and it would show how many of the desired packages have
>> substitutes that would be even more useful.  Looking at the concise code
>> it seems to be an almost trivial change.
>
> Attached is a patch against “weather.scm” that adds a “--manifest”
> option.

And here’s the missing addition to the “usage” output:

--- guix/scripts/weather.scm	2017-07-23 12:25:38.284361726 +0200
+++ guix/scripts/weather.scm.more	2017-07-23 13:00:31.021921693 +0200
@@ -145,6 +145,9 @@
       --substitute-urls=URLS
                          check for available substitutes at URLS"))
   (display (G_ "
+      --manifest=MANIFEST
+                         only look up substitutes for packages specified in MANIFEST"))
+  (display (G_ "
   -s, --system=SYSTEM    consider substitutes for SYSTEM--e.g., \"i686-linux\""))
   (newline)
   (display (G_ "