GNU bug report logs - #45972
[PATCH] Add julia-json with dependencies

Previous Next

Full log

Message #31 received at 45972 <at> debbugs.gnu.org (full text, mbox):

From: zimoun <zimon.toutoune <at> gmail.com>
To: Nicolò Balzarotti <anothersms <at> gmail.com>, Ludovic
 Courtès <ludo <at> gnu.org>
Cc: 45972 <at> debbugs.gnu.org
Subject: Re: [bug#45972] Julia importer?
Date: Sat, 30 Jan 2021 15:46:02 +0100

Hi,

On Thu, 28 Jan 2021 at 01:30, Nicolò Balzarotti <anothersms <at> gmail.com> wrote:

> Sure, I'd just read it from Package.toml (nowadays almost all the
> packages have this file, and for when it's missing we also have the
> julia-create-package-toml procedure that creates it).
>
> The file is toml, but I don't see a toml parser in guix.  So, I'd use a
> function like the following:
>
> #+begin_src scheme
> (define (package.toml->name file)
>   (call-with-input-file file
>     (lambda (in)
>       (let loop ((line (read-line in 'concat)))
>         (if (eof-object? line)
>             #f                          ;What to do?
>             (let ((m (string-match "name\\s*=\\s*\"(.*)\"" line)))
>               (if m (match:substring m 1)
>                   (loop (read-line in 'concat)))))))))
> #+end_src

[...]

> The other way I think this is easily solvable is by asking julia
> directly, by reading the output of:
>
> (invoke-julia "using Pkg; Pkg.TOML.parsefile("Project.toml")["name"] |> println")

With a bit more glue, could this be transformed into something like
“julia->guix-package”?  And so have a Julia package importer, even if it
fails for some cases.

WDYT?


All the best,
simon

Previous Next

GNU bug tracking system
Copyright (C) 1999 Darren O. Benham, 1997,2003 nCipher Corporation Ltd, 1994-97 Ian Jackson.