Re: getting started with guix import nix

[Paul Garlick]

Hi Ludo,

> > I have noticed that the non-termination problem is not confined to the
> > opencascage_oce package. If I try 
> >
> > $ nix-instantiate --strict --eval --xml -A guile
> > /home/paul/.nix-defexpr/channels/nixpkgs
> >
> > that does not terminate either.
>
>
> Does it just take long, or does it simply not terminate?

After a few (approximately five) minutes the process is still producing xml.  Looking at the output, after killing the process, there is a large amount of blank space plus the occasional line of xml, such as:

<function column="15" line="47" path="/nix/store/k3jqgxqfwg6q9bgkys63c25lbjprl3gq-nixpkgs-17.03pre96825.497e6d2/nixpkgs/lib/types.nix">

> $ nix-instantiate --version
> nix-instantiate (Nix) 1.11.2

For my nix installation:

$ nix-instantiate --version

nix-instantiate (Nix) 1.11.4

Also, I have cloned the nixpkgs repository so that I can change the version more easily.  To set the nixpkgs directory to be the same version as the version you are using:

$ git checkout dde259d

Then I get the same output:

$ export NIX_REMOTE=daemon

$ ./pre-inst-env guix import nix /data/paul/sourceCode/nixpkgs opencascade_oce

;;; SSAX warning: Skipping PI: xml

trace: lib.zip is deprecated, use lib.zipAttrsWith instead

trace: `mkStrict' is obsolete; use `mkOverride 0' instead.

trace: `types.list' is deprecated; use `types.listOf' instead

;; converted from /data/paul/sourceCode/nixpkgs/pkgs/development/libraries/opencascade/oce.nix:5

(package

  (name "opencascade-oce")

  (version "0.16")

  (source

    (origin

      (method url-fetch)

      (uri (string-append

             "https://github.com/tpaviot/oce/archive/OCE-"

             version

             ".tar.gz"))

      (sha256

        (base32

          "05bmg1cjz827bpq8s0hp96byirm4c3zc9vx26qz76kjsg8ry87w4"))))

  (build-system gnu-build-system)

  (inputs

    `(("cmake" ,cmake)

      ("freetype" ,freetype)

      ("ftgl" ,ftgl)

      ("qt" ,qt)

      ("libtool" ,libtool)

      ("libXmu" ,libXmu)

      ("file" ,file)

      ("tk" ,tk)

      ("tcl" ,tcl)

      ("mesa" ,mesa)))

  (home-page "http://www.opencascade.org/")

  (synopsis

    "Open CASCADE Technology, libraries for 3D modeling and numerical simulation")

  (description #f)

  (license #f))

paul$ cat /data/paul/sourceCode/nixpkgs/pkgs/development/libraries/opencascade/oce.nix

{stdenv, fetchurl, mesa, tcl, tk, file, libXmu, cmake, libtool, qt4,

ftgl, freetype}:

stdenv.mkDerivation rec {

  name = "opencascade-oce-0.16";

  src = "" {

    url = "" href="https://github.com/tpaviot/oce/archive/OCE-0.16.tar.gz">https://github.com/tpaviot/oce/archive/OCE-0.16.tar.gz;

    sha256 = "05bmg1cjz827bpq8s0hp96byirm4c3zc9vx26qz76kjsg8ry87w4";

  };

  buildInputs = [ mesa tcl tk file libXmu libtool qt4 ftgl freetype cmake ];

  preConfigure = ''

    cmakeFlags="$cmakeFlags -DOCE_INSTALL_PREFIX=$out"

  '';

  # https://bugs.freedesktop.org/show_bug.cgi?id=83631

  NIX_CFLAGS_COMPILE = "-DGLX_GLXEXT_LEGACY";

  enableParallelBuilding = true;

  meta = {

    description = "Open CASCADE Technology, libraries for 3D modeling and numerical simulation";

    homepage = http://www.opencascade.org/;

    maintainers = with stdenv.lib.maintainers; [viric];

    platforms = with stdenv.lib.platforms; linux;

  };

}

This is almost usable, except the version of the file oce.nix has changed since the dde259d commit.  Also, it may be nix-instantiate does not terminate for many other packages in recent versions of nixpkgs.

Best,

Paul.