[Top][All Lists]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: guile scheme tutorial

From: amirouche
Subject: Re: guile scheme tutorial
Date: Tue, 07 May 2019 09:09:30 +0200
User-agent: Roundcube Webmail/1.3.8

On 2019-05-07 04:15, rendaw wrote:
On 5/4/19 8:02 PM, address@hidden wrote:
On 2019-05-04 08:08, rendaw wrote:
On 5/3/19 9:45 PM, address@hidden wrote:

(Whoops, replied with the wrong account.)

Oh, this is great!  I've actually been putting together a small Guix
guide here:

It has a small Guile primer, but it doesn't go into depth or have any
hands on examples like yours.  My goal was to cover just enough so that
people could understand Guix configs (or at least 90% of them), so no
recursion, etc.  I'm glad you got into records, I just kind of handwaved that away ("they're functions", not 100% sure this is correct either).

That is good. The beginning looks like guix is not worthwhile and then
you continue in the second page with an introduction to guile and guix.
I find it nice actually.

I spotted a minor error:

  (system* (string-append #$openssl "/bin/openssl")
           "genrsa" "-out" private-key "2048"))

Indeed you can run programs like that but in guix it is preferred to run
with invoke, see the source :)

Thanks for sharing!

Oh awesome, thanks!  I saw the recommendation to use invoke (in the
package guide?) but actually I'd like to know what the difference
between invoke and system* are... the code above was something I grabbed
from the Guix source somewhere (cups.scm?)

I just checked now (defined in guix/build/utils.scm) and it looks like
invoke raises an exception if the command has a non-zero exit, but
otherwise they're the same.

Also it returns #t which is expected in every phase procedure.

reply via email to

[Prev in Thread] Current Thread [Next in Thread]