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 python@2 | 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 | h.goe...@crazy-compilers.com | | www.crazy-compilers.com | compilers which you thought are impossible |
