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<?xml version="1.0" encoding="UTF-8"?>
<article xmlns="http://docbook.org/ns/docbook"
xmlns:xlink="http://www.w3.org/1999/xlink">
<title>Nixpkgs Release Notes</title>
<section><title>Release 0.12 (TBA)</title>
<para>This release has the following improvements:
<itemizedlist>
<listitem><para>TODO: simplified and expanded stdenv hook
handling.</para></listitem>
<listitem><para>Important updates:
<itemizedlist>
<listitem><para>Glibc 2.7.</para></listitem>
<listitem><para>GCC 4.2.4.</para></listitem>
<listitem><para>Linux 2.6.25.</para></listitem>
</itemizedlist>
</para></listitem>
</itemizedlist>
</para>
</section>
<section><title>Release 0.11 (September 11, 2007)</title>
<para>This release has the following improvements:
<itemizedlist>
<listitem><para>The standard build environment
(<literal>stdenv</literal>) is now pure on the
<literal>x86_64-linux</literal> and <literal>powerpc-linux</literal>
platforms, just as on <literal>i686-linux</literal>. (Purity means
that building and using the standard environment has no dependencies
outside of the Nix store. For instance, it doesnt require an
external C compiler such as <filename>/usr/bin/gcc</filename>.)
Also, the statically linked binaries used in the bootstrap process
are now automatically reproducible, making it easy to update the
bootstrap tools and to add support for other Linux platforms. See
<filename>pkgs/stdenv/linux/make-bootstrap-tools.nix</filename> for
details.</para></listitem>
<listitem><para>Hook variables in the generic builder are now
executed using the <function>eval</function> shell command. This
has a major advantage: you can write hooks directly in Nix
expressions. For instance, rather than writing a builder like this:
<programlisting>
source $stdenv/setup
postInstall=postInstall
postInstall() {
ln -sf gzip $out/bin/gunzip
ln -sf gzip $out/bin/zcat
}
genericBuild</programlisting>
(the <literal>gzip</literal> builder), you can just add this
attribute to the derivation:
<programlisting>
postInstall = "ln -sf gzip $out/bin/gunzip; ln -sf gzip $out/bin/zcat";</programlisting>
and so a separate build script becomes unnecessary. This should
allow us to get rid of most builders in Nixpkgs.</para></listitem>
<listitem><para>It is now possible to have the generic builder pass
arguments to <command>configure</command> and
<command>make</command> that contain whitespace. Previously, for
example, you could say in a builder,
<programlisting>
configureFlags="CFLAGS=-O0"</programlisting>
but not
<programlisting>
configureFlags="CFLAGS=-O0 -g"</programlisting>
since the <literal>-g</literal> would be interpreted as a separate
argument to <command>configure</command>. Now you can say
<programlisting>
configureFlagsArray=("CFLAGS=-O0 -g")</programlisting>
or similarly
<programlisting>
configureFlagsArray=("CFLAGS=-O0 -g" "LDFLAGS=-L/foo -L/bar")</programlisting>
which does the right thing. Idem for <literal>makeFlags</literal>,
<literal>installFlags</literal>, <literal>checkFlags</literal> and
<literal>distFlags</literal>.</para>
<para>Unfortunately you can't pass arrays to Bash through the
environment, so you can't put the array above in a Nix expression,
e.g.,
<programlisting>
configureFlagsArray = ["CFLAGS=-O0 -g"];</programlisting>
since it would just be flattened to a since string. However, you
<emphasis>can</emphasis> use the inline hooks described above:
<programlisting>
preConfigure = "configureFlagsArray=(\"CFLAGS=-O0 -g\")";</programlisting>
</para></listitem>
<listitem><para>The function <function>fetchurl</function> now has
support for two different kinds of mirroring of files. First, it
has support for <emphasis>content-addressable mirrors</emphasis>.
For example, given the <function>fetchurl</function> call
<programlisting>
fetchurl {
url = http://releases.mozilla.org/<replaceable>...</replaceable>/firefox-2.0.0.6-source.tar.bz2;
sha1 = "eb72f55e4a8bf08e8c6ef227c0ade3d068ba1082";
}</programlisting>
<function>fetchurl</function> will first try to download this file
from <link
xlink:href="http://nixos.org/tarballs/sha1/eb72f55e4a8bf08e8c6ef227c0ade3d068ba1082"/>.
If that file doesnt exist, it will try the original URL. In
general, the “content-addressed” location is
<replaceable>mirror</replaceable><literal>/</literal><replaceable>hash-type</replaceable><literal>/</literal><replaceable>hash</replaceable>.
There is currently only one content-addressable mirror (<link
xlink:href="http://nixos.org/tarballs"/>), but more can be
specified in the <varname>hashedMirrors</varname> attribute in
<filename>pkgs/build-support/fetchurl/mirrors.nix</filename>, or by
setting the <envar>NIX_HASHED_MIRRORS</envar> environment variable
to a whitespace-separated list of URLs.</para>
<para>Second, <function>fetchurl</function> has support for
widely-mirrored distribution sites such as SourceForge or the Linux
kernel archives. Given a URL of the form
<literal>mirror://<replaceable>site</replaceable>/<replaceable>path</replaceable></literal>,
it will try to download <replaceable>path</replaceable> from a
configurable list of mirrors for <replaceable>site</replaceable>.
(This idea was borrowed from Gentoo Linux.) Example:
<programlisting>
fetchurl {
url = mirror://gnu/gcc/gcc-4.2.0/gcc-core-4.2.0.tar.bz2;
sha256 = "0ykhzxhr8857dr97z0j9wyybfz1kjr71xk457cfapfw5fjas4ny1";
}</programlisting>
Currently <replaceable>site</replaceable> can be
<literal>sourceforge</literal>, <literal>gnu</literal> and
<literal>kernel</literal>. The list of mirrors is defined in
<filename>pkgs/build-support/fetchurl/mirrors.nix</filename>. You
can override the list of mirrors for a particular site by setting
the environment variable
<envar>NIX_MIRRORS_<replaceable>site</replaceable></envar>, e.g.
<programlisting>
export NIX_MIRRORS_sourceforge=http://osdn.dl.sourceforge.net/sourceforge/</programlisting>
</para>
</listitem>
<listitem><para>Important updates:
<itemizedlist>
<listitem><para>Glibc 2.5.</para></listitem>
<listitem><para>GCC 4.1.2.</para></listitem>
<listitem><para>Gnome 2.16.3.</para></listitem>
<listitem><para>X11R7.2.</para></listitem>
<listitem><para>Linux 2.6.21.7 and 2.6.22.6.</para></listitem>
<listitem><para>Emacs 22.1.</para></listitem>
</itemizedlist>
</para></listitem>
<listitem><para>Major new packages:
<itemizedlist>
<listitem><para>KDE 3.5.6 Base.</para></listitem>
<listitem><para>Wine 0.9.43.</para></listitem>
<listitem><para>OpenOffice 2.2.1.</para></listitem>
<listitem><para>Many Linux system packages to support
NixOS.</para></listitem>
</itemizedlist>
</para></listitem>
</itemizedlist>
</para>
<para>The following people contributed to this release:
Andres Löh,
Arie Middelkoop,
Armijn Hemel,
Eelco Dolstra,
Marc Weber,
Mart Kolthof,
Martin Bravenboer,
Michael Raskin,
Wouter den Breejen and
Yury G. Kudryashov.
</para>
</section>
<section><title>Release 0.10 (October 12, 2006)</title>
<note><para>This release of Nixpkgs requires <link
xlink:href='http://nixos.org/releases/nix/nix-0.10/'>Nix
0.10</link> or higher.</para></note>
<para>This release has the following improvements:</para>
<itemizedlist>
<listitem><para><filename>pkgs/system/all-packages-generic.nix</filename>
is gone, we now just have
<filename>pkgs/top-level/all-packages.nix</filename> that contains
all available packages. This should cause much less confusion with
users. <filename>all-packages.nix</filename> is a function that by
default returns packages for the current platform, but you can
override this by specifying a different <varname>system</varname>
argument.</para></listitem>
<listitem><para>Certain packages in Nixpkgs are now
user-configurable through a configuration file, i.e., without having
to edit the Nix expressions in Nixpkgs. For instance, the Firefox
provided in the Nixpkgs channel is built without the RealPlayer
plugin (for legal reasons). Previously, you could easily enable
RealPlayer support by editing the call to the Firefox function in
<filename>all-packages.nix</filename>, but such changes are not
respected when Firefox is subsequently updated through the Nixpkgs
channel.</para>
<para>The Nixpkgs configuration file (found in
<filename>~/.nixpkgs/config.nix</filename> or through the
<envar>NIXPKGS_CONFIG</envar> environment variable) is an attribute
set that contains configuration options that
<filename>all-packages.nix</filename> reads and uses for certain
packages. For instance, the following configuration file:
<programlisting>
{
firefox = {
enableRealPlayer = true;
};
}</programlisting>
persistently enables RealPlayer support in the Firefox
build.</para>
<para>(Actually, <literal>firefox.enableRealPlayer</literal> is the
<emphasis>only</emphasis> configuration option currently available,
but more are sure to be added.)</para></listitem>
<listitem><para>Support for new platforms:
<itemizedlist>
<listitem><para><literal>i686-cygwin</literal>, i.e., Windows
(using <link xlink:href="http://www.cygwin.com/">Cygwin</link>).
The standard environment on <literal>i686-cygwin</literal> by
default builds binaries for the Cygwin environment (i.e., it
uses Cygwin tools and produces executables that use the Cygwin
library). However, there is also a standard environment that
produces binaries that use <link
xlink:href="http://www.mingw.org/">MinGW</link>. You can use it
by calling <filename>all-package.nix</filename> with the
<varname>stdenvType</varname> argument set to
<literal>"i686-mingw"</literal>.</para></listitem>
<listitem><para><literal>i686-darwin</literal>, i.e., Mac OS X
on Intel CPUs.</para></listitem>
<listitem><para><literal>powerpc-linux</literal>.</para></listitem>
<listitem><para><literal>x86_64-linux</literal>, i.e., Linux on
64-bit AMD/Intel CPUs. Unlike <literal>i686-linux</literal>,
this platform doesnt have a pure <literal>stdenv</literal>
yet.</para></listitem>
</itemizedlist>
</para>
</listitem>
<listitem><para>The default compiler is now GCC 4.1.1.</para></listitem>
<listitem><para>X11 updated to X.orgs X11R7.1.</para></listitem>
<listitem><para>Notable new packages:
<itemizedlist>
<listitem><para>Opera.</para></listitem>
<listitem><para>Microsoft Visual C++ 2005 Express Edition and
the Windows SDK.</para></listitem>
</itemizedlist>
In total there are now around 809 packages in Nixpkgs.</para>
</listitem>
<listitem><para>It is now <emphasis>much</emphasis> easier to
override the default C compiler and other tools in
<literal>stdenv</literal> for specific packages.
<filename>all-packages.nix</filename> provides two utility
functions for this purpose: <function>overrideGCC</function> and
<function>overrideInStdenv</function>. Both take a
<literal>stdenv</literal> and return an augmented
<literal>stdenv</literal>; the formed changes the C compiler, and
the latter adds additional packages to the front of
<literal>stdenv</literal>s initial <envar>PATH</envar>, allowing
tools to be overriden.</para>
<para>For instance, the package <varname>strategoxt</varname>
doesnt build with the GNU Make in <literal>stdenv</literal>
(version 3.81), so we call it with an augmented
<literal>stdenv</literal> that uses GNU Make 3.80:
<programlisting>
strategoxt = (import ../development/compilers/strategoxt) {
inherit fetchurl pkgconfig sdf aterm;
stdenv = overrideInStdenv stdenv [gnumake380];
};
gnumake380 = <replaceable>...</replaceable>;</programlisting>
Likewise, there are many packages that dont compile with the
default GCC (4.1.1), but thats easily fixed:
<programlisting>
exult = import ../games/exult {
inherit fetchurl SDL SDL_mixer zlib libpng unzip;
stdenv = overrideGCC stdenv gcc34;
};</programlisting>
</para></listitem>
<listitem><para>It has also become much easier to experiment with
changes to the <literal>stdenv</literal> setup script (which notably
contains the generic builder). Since edits to
<filename>pkgs/stdenv/generic/setup.sh</filename> trigger a rebuild
of <emphasis>everything</emphasis>, this was formerly quite painful.
But now <literal>stdenv</literal> contains a function to
“regenerate” <literal>stdenv</literal> with a different setup
script, allowing the use of a different setup script for specific
packages:
<programlisting>
pkg = import <replaceable>...</replaceable> {
stdenv = stdenv.regenerate ./my-setup.sh;
<replaceable>...</replaceable>
}</programlisting>
</para></listitem>
<listitem><para>Packages can now have a human-readable
<emphasis>description</emphasis> field. Package descriptions are
shown by <literal>nix-env -qa --description</literal>. In addition,
theyre shown on the Nixpkgs release page. A description can be
added to a package as follows:
<programlisting>
stdenv.mkDerivation {
name = "exult-1.2";
<replaceable>...</replaceable>
meta = {
description = "A reimplementation of the Ultima VII game engine";
};
}</programlisting>
The <varname>meta</varname> attribute is not passed to the builder,
so changes to the description do not trigger a rebuild. Additional
<varname>meta</varname> attributes may be defined in the future
(such as the URL of the packages homepage, the license,
etc.).</para></listitem>
</itemizedlist>
<para>The following people contributed to this release:
Andres Löh,
Armijn Hemel,
Christof Douma,
Eelco Dolstra,
Eelco Visser,
Mart Kolthof,
Martin Bravenboer,
Merijn de Jonge,
Rob Vermaas and
Roy van den Broek.
</para>
</section>
<section><title>Release 0.9 (January 31, 2006)</title>
<para>There have been zillions of changes since the last release of
Nixpkgs. Many packages have been added or updated. The following are
some of the more notable changes:</para>
<itemizedlist>
<listitem><para>Distribution files have been moved to <link
xlink:href="http://nixos.org/" />.</para></listitem>
<listitem><para>The C library on Linux, Glibc, has been updated to
version 2.3.6.</para></listitem>
<listitem><para>The default compiler is now GCC 3.4.5. GCC 4.0.2 is
also available.</para></listitem>
<listitem><para>The old, unofficial Xlibs has been replaced by the
official modularised X11 distribution from X.org, i.e., X11R7.0.
X11R7.0 consists of 287 (!) packages, all of which are in Nixpkgs
though not all have been tested. It is now possible to build a
working X server (previously we only had X client libraries). We
use a fully Nixified X server on NixOS.</para></listitem>
<listitem><para>The Sun JDK 5 has been purified, i.e., it doesnt
require any non-Nix components such as
<filename>/lib/ld-linux.so.2</filename>. This means that Java
applications such as Eclipse and Azureus can run on
NixOS.</para></listitem>
<listitem><para>Hardware-accelerated OpenGL support, used by games
like Quake 3 (which is now built from source).</para></listitem>
<listitem><para>Improved support for FreeBSD on
x86.</para></listitem>
<listitem><para>Improved Haskell support; e.g., the GHC build is now
pure.</para></listitem>
<listitem><para>Some support for cross-compilation: cross-compiling
builds of GCC and Binutils, and cross-compiled builds of the C
library uClibc.</para></listitem>
<listitem><para>Notable new packages:
<itemizedlist>
<listitem><para>teTeX, including support for building LaTeX
documents using Nix (with automatic dependency
determination).</para></listitem>
<listitem><para>Ruby.</para></listitem>
<listitem><para>System-level packages to support NixOS,
e.g. Grub, GNU <literal>parted</literal> and so
on.</para></listitem>
<listitem><para><literal>ecj</literal>, the Eclipse Compiler for
Java, so we finally have a freely distributable compiler that
supports Java 5.0.</para></listitem>
<listitem><para><literal>php</literal>.</para></listitem>
<listitem><para>The GIMP.</para></listitem>
<listitem><para>Inkscape.</para></listitem>
<listitem><para>GAIM.</para></listitem>
<listitem><para><literal>kdelibs</literal>. This allows us to
add KDE-based packages (such as
<literal>kcachegrind</literal>).</para></listitem>
</itemizedlist>
</para></listitem>
</itemizedlist>
<para>The following people contributed to this release:
Andres Löh,
Armijn Hemel,
Bogdan Dumitriu,
Christof Douma,
Eelco Dolstra,
Eelco Visser,
Mart Kolthof,
Martin Bravenboer,
Rob Vermaas and
Roy van den Broek.
</para>
</section>
<section><title>Release 0.8 (April 11, 2005)</title>
<para>This release is mostly to remain synchronised with the changed
hashing scheme in Nix 0.8.</para>
<para>Notable updates:
<itemizedlist>
<listitem><para>Adobe Reader 7.0</para></listitem>
<listitem><para>Various security updates (zlib 1.2.2, etc.)</para></listitem>
</itemizedlist>
</para>
</section>
<section><title>Release 0.7 (March 14, 2005)</title>
<itemizedlist>
<listitem>
<para>The bootstrap process for the standard build
environment on Linux (stdenv-linux) has been improved. It is no
longer dependent in its initial bootstrap stages on the system
Glibc, GCC, and other tools. Rather, Nixpkgs contains a statically
linked bash and curl, and uses that to download other statically
linked tools. These are then used to build a Glibc and dynamically
linked versions of all other tools.</para>
<para>This change also makes the bootstrap process faster. For
instance, GCC is built only once instead of three times.</para>
<para>(Contributed by Armijn Hemel.)</para>
</listitem>
<listitem>
<para>Tarballs used by Nixpkgs are now obtained from the same server
that hosts Nixpkgs (<link
xlink:href="http://catamaran.labs.cs.uu.nl/" />). This reduces the
risk of packages being unbuildable due to moved or deleted files on
various servers.</para>
</listitem>
<listitem>
<para>There now is a generic mechanism for building Perl modules.
See the various Perl modules defined in
pkgs/system/all-packages-generic.nix.</para>
</listitem>
<listitem>
<para>Notable new packages:
<itemizedlist>
<listitem><para>Qt 3</para></listitem>
<listitem><para>MySQL</para></listitem>
<listitem><para>MythTV</para></listitem>
<listitem><para>Mono</para></listitem>
<listitem><para>MonoDevelop (alpha)</para></listitem>
<listitem><para>Xine</para></listitem>
</itemizedlist>
</para>
</listitem>
<listitem>
<para>Notable updates:
<itemizedlist>
<listitem><para>GCC 3.4.3</para></listitem>
<listitem><para>Glibc 2.3.4</para></listitem>
<listitem><para>GTK 2.6</para></listitem>
</itemizedlist>
</para>
</listitem>
</itemizedlist>
</section>
</article>