From mboxrd@z Thu Jan  1 00:00:00 1970
From: Ricardo Wurmus <ricardo.wurmus@mdc-berlin.de>
Subject: Re: Building many packages in order
Date: Mon, 24 Oct 2016 15:56:43 +0200
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To: Hartmut Goebel <h.goebel@crazy-compilers.com>
Cc: guix-devel <guix-devel@gnu.org>


Hartmut Goebel <h.goebel@crazy-compilers.com> writes:

> Hi,
>
> testing the new python build system I=E2=80=99m seeking for some way to=
 build
> *many* packages in order.
>
> Of course I can just run `guix build` with the list of packages to be
> build. But when building all python packages, the list gets rather long
> and does not fit into one call of `guix build` (due to the number of
> arguments xargs passes to the command is restricted). Thus only
> partitions of the packages are build in order.
> =20
> So I need some way for passing *all* packages to be build to `guix buil=
d`.

Here=E2=80=99s what I do to rebuild all bioconductor packages:


guix build -e '((@@ (gnu packages) fold-packages)
                (lambda (pkg acc)
                  (if ((@@ (guix import cran) bioconductor-package?) pkg)
                      (cons pkg acc)
                      acc))
                (list))'

=E2=80=9Cfold-packages=E2=80=9D takes a procedure that accumulates a list=
 of packages.
It takes the current package and the list of accumulated packages so
far.  Here I=E2=80=99m using =E2=80=9Cbioconductor-package?=E2=80=9D as a=
 predicate, but you
could use something else in its place (e.g. a procedure testing the
package name).

~~ Ricardo