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Bugs in parsing build options

From: Alex Kost
Subject: Bugs in parsing build options
Date: Fri, 20 Feb 2015 23:47:57 +0300
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/24.4 (gnu/linux)

Ludovic Courtès (2014-12-06 18:04 +0300) wrote:

> Deck Pickard <address@hidden> skribis:
>> From 9c27d995e1a622de8457209d40031b392538e0f8 Mon Sep 17 00:00:00 2001
>> From: nebuli <address@hidden>
>> Date: Fri, 5 Dec 2014 01:28:12 +0100
>> Subject: [PATCH] guix: scripts: Fix GUIX_BUILD_OPTIONS handling.
>> Appending to "raw" args broke optional parameters in 'guix package -I'
>> and 'guix package -A', and possibly other places.  Therefore, switch to
>> parsing each set of options on its own and append resulting alists
>> together afterwards.
>> * guix/scripts/archive.scm (parse-options-from): Rename from
>>   (parse-options) and add explicit argument.  New form of (parse-options)
>>   using its old algorithm via -from function.
>> * guix/scripts/build.scm: Ditto.
>> * guix/scripts/environment.scm: Ditto.
>> * guix/scripts/package.scm: Ditto.
>> * guix/scripts/system.scm: Ditto.
> Good catch.  I’ve applied it along with a test case that reproduces the
> problem and a clarification in the doc.

Hello, I think I found a problem with this commit.

I noticed that "--no-grub" option has no effect.  For example,
"guix system --no-grub reconfigure" installs GRUB anyway.

Further investigation showed that there is a problem in parsing build
options.  After that commit (847391f) we have the following code:

    (append (parse-options-from args)
            (parse-options-from (environment-build-options)))

in several places.  But 'parse-options-from' returns default values for
unspecified options, e.g. if you didn't set GUIX_BUILD_OPTIONS, then
(parse-options-from '()) will return an alist of default options
(including ‘(install-grub? . #t)’).

So build commands will just ignore such options as "--no-grub" or
"--no-substitutes" if a user didn't tweak GUIX_BUILD_OPTIONS.


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