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Re: Building many packages in order
From: |
Hartmut Goebel |
Subject: |
Re: Building many packages in order |
Date: |
Fri, 21 Oct 2016 14:23:17 +0200 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.3.0 |
Am 21.10.2016 um 13:53 schrieb Efraim Flashner:
> If you want to build all packages that are python- or python2-, then you
> can call 'guix build $(guix package -A ^python | cut -f1)'
I was about to answer that this will not work if the length of the
arguments string exceeds some limit. This made me re-check my premises
and found they are wrong: Both the length of the commands line and the
number of arguments to be passed to a new process are *really* big. See [1].
So I checked again and my command line is about 18,000 characters long
and even xargs calls `guix build` only once.
So my premises was irrelevant and my "mass rebuild" script works as
expected.
> If you want all the packages that rely on python or python-2, then you
> can call 'guix build $(guix refresh -l python address@hidden | cut -d':' -f2)'
Thanks for this trick. I'm not used to "guix refresh" and my code for
selecting the packages is much more complicated. (I select them by
name.) I really have to get more common with these guix subcommands.
[1]
http://unix.stackexchange.com/questions/120642/what-defines-the-maximum-size-for-a-command-single-argument
--
Regards
Hartmut Goebel
| Hartmut Goebel | address@hidden |
| www.crazy-compilers.com | compilers which you thought are impossible |