unofficial mirror of guix-devel@gnu.org 
 help / color / mirror / code / Atom feed
From: "Ludovic Courtès" <ludo@gnu.org>
To: Maxime Devos <maximedevos@telenet.be>
Cc: Arun Isaac <arunisaac@systemreboot.net>,
	 Guix Devel <guix-devel@gnu.org>
Subject: Re: Move switch-symlinks to (guix build utils)
Date: Fri, 03 Jun 2022 21:30:04 +0200	[thread overview]
Message-ID: <87ilphilz7.fsf@gnu.org> (raw)
In-Reply-To: <2c194c3b2f192ba49caaf585703f95b6c6bcb7d9.camel@telenet.be> (Maxime Devos's message of "Fri, 03 Jun 2022 19:09:02 +0200")

Hi,

Maxime Devos <maximedevos@telenet.be> skribis:

> Maybe replace
>
>    (symlink target pivot)
>
> by (symlink/remove-old target pivot)
>
> where
>
> (define (symlink/remove-old target link)
>   "Make a symbolic link named LINK pointing to TARGET.
> If LINK already exists, it will be removed first.
> This is not an atomic operation."
>   (catch 'system-error
>     (lambda ()
>       (symlink target link))
>     (lambda stuff
>       (if (= (system-error-errno stuff) EEXIST)
>           (begin
>             ;; remove old link and retry
>             (delete-file link)
>             (symlink/remove-old link target))
>           (apply throw stuff)))))

Alright, SGTM (this procedure would be kept private).

So Arun, the floor is yours!  :-)

Ludo’.


  reply	other threads:[~2022-06-03 19:31 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-06-01  7:34 Move switch-symlinks to (guix build utils) Arun Isaac
2022-06-01 12:09 ` Maxime Devos
2022-06-02 15:06   ` Arun Isaac
2022-06-02 15:13     ` Maxime Devos
2022-06-03 16:38       ` Ludovic Courtès
2022-06-03 17:09         ` Maxime Devos
2022-06-03 19:30           ` Ludovic Courtès [this message]
2022-06-03 19:30           ` Ludovic Courtès
2022-06-03 23:55             ` bokr
2022-06-04 10:17               ` Maxime Devos
2022-06-06 11:27           ` Arun Isaac
2022-06-06 12:20             ` Maxime Devos
2022-06-08 20:12               ` Arun Isaac

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

  List information: https://guix.gnu.org/

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=87ilphilz7.fsf@gnu.org \
    --to=ludo@gnu.org \
    --cc=arunisaac@systemreboot.net \
    --cc=guix-devel@gnu.org \
    --cc=maximedevos@telenet.be \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
Code repositories for project(s) associated with this public inbox

	https://git.savannah.gnu.org/cgit/guix.git

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).