From: "Ludovic Courtès" <ludo@gnu.org>
To: zimoun <zimon.toutoune@gmail.com>
Cc: 44321@debbugs.gnu.org
Subject: [bug#44321] [PATCH 6/6] doc: Add "Defining Package Variants" section.
Date: Sat, 31 Oct 2020 11:14:55 +0100 [thread overview]
Message-ID: <87eelewvkw.fsf@gnu.org> (raw)
In-Reply-To: <875z6s6jv1.fsf@gmail.com> (zimoun's message of "Fri, 30 Oct 2020 12:20:18 +0100")
Hi,
zimoun <zimon.toutoune@gmail.com> skribis:
> On Fri, 30 Oct 2020 at 00:10, Ludovic Courtès <ludo@gnu.org> wrote:
>
>> -* Invoking guix repl:: Programming Guix in Guile.
>> +* Invoking guix repl:: Programming Guix in Guile
>
> This change is already in commit 729d4ba025bc8556d00041f9af5b6609eeec9d80.
OK, I’ll have to rebase and regenerate the menus maybe.
>> +You can just as well define variants with a different set of
>> +dependencies than the original package. For example, the default
>> +@code{gdb} package depends on @code{guile}, but since that is an
>> +optional dependency, you can define a variant that removes that
>> +dependency like so:
>> +
>> +@lisp
>> +(use-modules (gnu packages gdb) ;for 'gdb'
>> + (srfi srfi-1)) ;for 'alist-delete'
>> +
>> +(define gdb-sans-guile
>> + (package
>> + (inherit gdb)
>> + (inputs (alist-delete "guile"
>> + (package-inputs gdb)))))
>> +@end lisp
>
> Does it make sense to add a sentence explaining that the “guile” is the
> name provided by the string in the ’inputs’ list of the package ’gdb’,
Yeah, I’ll add a sentence like:
+The @code{alist-delete} call above removes the tuple from the
+@code{inputs} field that has @code{"guile"} as its first element
+(@pxref{SRFI-1 Association Lists,,, guile, GNU Guile Reference
+Manual}).
>> +@deffn {Scheme Procedure} options->transformation @var{opts}
>> +Return a procedure that, when passed an object to build (package,
>> +derivation, etc.), applies the transformations specified by @var{opts} and returns
>> +the resulting objects. @var{opts} must be a list of symbol/string pairs such as:
>> +
>> +@example
>> +((with-branch . "guile-gcrypt=master")
>> + (without-tests . "libgcrypt"))
>> +@end example
>
> Is it on purpose that here you use ’without-tests’ and then…
[...]
> …you use ’with-debug-info’ as example?
Yeah, the two examples are independent of one another so I guess it’s
fine to have some diversity, no?
>> +@lisp
>> +(define libressl-instead-of-openssl
>> + ;; Replace all the packages called "openssl" with LibreSSL.
>> + (package-input-rewriting/spec `(("openssl" . ,(const libressl)))))
>> +@end lisp
>
> It is already in the manual but why this ’const’?
Because ‘package-input-rewriting/spec’ takes a list of spec/procedure
pairs.
Thanks!
Ludo’.
next prev parent reply other threads:[~2020-10-31 10:16 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-29 23:08 [bug#44321] [PATCH 0/6] Adding a (guix transformations) module Ludovic Courtès
2020-10-29 23:09 ` [bug#44321] [PATCH 1/6] guix build: 'package-with-source' no longer takes a 'store' parameter Ludovic Courtès
2020-10-29 23:09 ` [bug#44321] [PATCH 2/6] guix build: Remove unnecessary (replacement #f) Ludovic Courtès
2020-10-29 23:09 ` [bug#44321] [PATCH 3/6] guix build: 'options->transformation' no longer takes a 'store' parameter Ludovic Courtès
2020-10-30 22:27 ` Miguel Ángel Arruga Vivas
2020-10-31 10:03 ` Ludovic Courtès
2020-10-29 23:09 ` [bug#44321] [PATCH 4/6] guix build: Move transformation options to (guix transformations) Ludovic Courtès
2020-10-30 23:03 ` Miguel Ángel Arruga Vivas
2020-10-31 10:04 ` Ludovic Courtès
2020-10-29 23:09 ` [bug#44321] [PATCH 5/6] transformations: Raise '&formatted-message' exceptions instead of 'leave' Ludovic Courtès
2020-10-30 10:59 ` zimoun
2020-10-30 22:39 ` Miguel Ángel Arruga Vivas
2020-10-31 10:06 ` Ludovic Courtès
2020-10-31 22:18 ` bug#44321: " Ludovic Courtès
2020-11-02 12:25 ` [bug#44321] " zimoun
2020-11-02 15:48 ` Ludovic Courtès
2020-10-29 23:10 ` [bug#44321] [PATCH 6/6] doc: Add "Defining Package Variants" section Ludovic Courtès
2020-10-30 11:20 ` zimoun
2020-10-31 10:14 ` Ludovic Courtès [this message]
2020-10-30 23:27 ` [bug#44321] [PATCH 1/6] guix build: 'package-with-source' no longer takes a 'store' parameter Miguel Ángel Arruga Vivas
2020-10-31 10:17 ` Ludovic Courtès
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