From: zimoun <zimon.toutoune@gmail.com>
To: Pierre Neidhardt <mail@ambrevar.xyz>
Cc: 41539@debbugs.gnu.org, "Ludovic Courtès" <ludo@gnu.org>
Subject: [bug#41539] [PATCH 1/2] size: Document that positional arguments can be store items.
Date: Fri, 29 May 2020 11:56:30 +0200 [thread overview]
Message-ID: <CAJ3okZ2ePQBOGv=mFtW1WU5Qn1HkhNpeMU0hZX_stGy1zD1xrg@mail.gmail.com> (raw)
In-Reply-To: <87zh9rf5z8.fsf@ambrevar.xyz>
Dear,
On Fri, 29 May 2020 at 11:26, Pierre Neidhardt <mail@ambrevar.xyz> wrote:
> >> +@example
> >> +guix size $(guix system build config.scm)
> >
> > Please use backquotes instead of $(…), which is Bash-specific.
>
> Actually, it's not, $(...) is POSIX (you can test with Dash).
> Backquotes are deprecated and have the downside of not nesting.
Yes, $(...) is POSIX, AFAIK.
And let quote what POSIX says: "Because of these inconsistent
behaviors, the backquoted variety of command substitution is not
recommended for new applications that nest command substitutions or
attempt to embed complex scripts."
https://pubs.opengroup.org/onlinepubs/9699919799/xrat/V4_xcu_chap02.html#tag_23_02_06_03
(I do not know if it is the latest version of the document.)
Well, $(...) is already used in the manual. For example, X11 fonts
section because of nested. But elsewhere not, see e.g., invoking guix
archive or Nteworking Services or Invoking guix system sections.
https://guix.gnu.org/manual/devel/en/guix.html#X11-Fonts
https://guix.gnu.org/manual/devel/en/guix.html#Invoking-guix-archive
https://guix.gnu.org/manual/devel/en/guix.html#Networking-Services
https://guix.gnu.org/manual/devel/en/guix.html#Invoking-guix-system
Therefore, only one should be used. And $(...) is better. So I would
be in favour to replace all the backquotes by $(...) in the manual.
All the best,
simon
next prev parent reply other threads:[~2020-05-29 9:58 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-26 13:38 [bug#41539] [PATCH 1/2] size: Document that positional arguments can be store items Pierre Neidhardt
2020-05-26 13:40 ` [bug#41539] [PATCH 2/2] doc: Add example to calculate the size a system Pierre Neidhardt
2020-05-28 21:19 ` [bug#41539] [PATCH 1/2] size: Document that positional arguments can be store items Ludovic Courtès
2020-05-29 9:25 ` Pierre Neidhardt
2020-05-29 9:56 ` zimoun [this message]
2020-05-29 10:09 ` Ludovic Courtès
2020-05-29 16:56 ` Pierre Neidhardt
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