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148 lines
5.2 KiB
XML
148 lines
5.2 KiB
XML
<section xmlns="http://docbook.org/ns/docbook"
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xmlns:xlink="http://www.w3.org/1999/xlink"
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xmlns:xi="http://www.w3.org/2001/XInclude"
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version="5.0"
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xml:id="ssec-relnotes-1.11">
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<title>Release 1.11 (2016-01-19)</title>
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<para>This is primarily a bug fix release. It also has a number of new
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features:</para>
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<itemizedlist>
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<listitem>
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<para><command>nix-prefetch-url</command> can now download URLs
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specified in a Nix expression. For example,
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<screen>
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$ nix-prefetch-url -A hello.src
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</screen>
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will prefetch the file specified by the
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<function>fetchurl</function> call in the attribute
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<literal>hello.src</literal> from the Nix expression in the
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current directory, and print the cryptographic hash of the
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resulting file on stdout. This differs from <literal>nix-build -A
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hello.src</literal> in that it doesn't verify the hash, and is
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thus useful when you’re updating a Nix expression.</para>
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<para>You can also prefetch the result of functions that unpack a
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tarball, such as <function>fetchFromGitHub</function>. For example:
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<screen>
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$ nix-prefetch-url --unpack https://github.com/NixOS/patchelf/archive/0.8.tar.gz
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</screen>
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or from a Nix expression:
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<screen>
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$ nix-prefetch-url -A nix-repl.src
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</screen>
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</para>
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</listitem>
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<listitem>
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<para>The builtin function
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<function><nix/fetchurl.nix></function> now supports
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downloading and unpacking NARs. This removes the need to have
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multiple downloads in the Nixpkgs stdenv bootstrap process (like a
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separate busybox binary for Linux, or curl/mkdir/sh/bzip2 for
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Darwin). Now all those files can be combined into a single NAR,
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optionally compressed using <command>xz</command>.</para>
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</listitem>
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<listitem>
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<para>Nix now supports SHA-512 hashes for verifying fixed-output
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derivations, and in <function>builtins.hashString</function>.</para>
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</listitem>
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<listitem>
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<para>
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The new flag <option>--option build-repeat
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<replaceable>N</replaceable></option> will cause every build to
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be executed <replaceable>N</replaceable>+1 times. If the build
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output differs between any round, the build is rejected, and the
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output paths are not registered as valid. This is primarily
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useful to verify build determinism. (We already had a
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<option>--check</option> option to repeat a previously succeeded
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build. However, with <option>--check</option>, non-deterministic
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builds are registered in the DB. Preventing that is useful for
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Hydra to ensure that non-deterministic builds don't end up
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getting published to the binary cache.)
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</para>
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</listitem>
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<listitem>
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<para>
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The options <option>--check</option> and <option>--option
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build-repeat <replaceable>N</replaceable></option>, if they
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detect a difference between two runs of the same derivation and
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<option>-K</option> is given, will make the output of the other
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run available under
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<filename><replaceable>store-path</replaceable>-check</filename>. This
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makes it easier to investigate the non-determinism using tools
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like <command>diffoscope</command>, e.g.,
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<screen>
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$ nix-build pkgs/stdenv/linux -A stage1.pkgs.zlib --check -K
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error: derivation ‘/nix/store/l54i8wlw2265…-zlib-1.2.8.drv’ may not
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be deterministic: output ‘/nix/store/11a27shh6n2i…-zlib-1.2.8’
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differs from ‘/nix/store/11a27shh6n2i…-zlib-1.2.8-check’
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$ diffoscope /nix/store/11a27shh6n2i…-zlib-1.2.8 /nix/store/11a27shh6n2i…-zlib-1.2.8-check
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…
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├── lib/libz.a
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│ ├── metadata
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│ │ @@ -1,15 +1,15 @@
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│ │ -rw-r--r-- 30001/30000 3096 Jan 12 15:20 2016 adler32.o
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…
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│ │ +rw-r--r-- 30001/30000 3096 Jan 12 15:28 2016 adler32.o
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…
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</screen>
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</para></listitem>
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<listitem>
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<para>Improved FreeBSD support.</para>
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</listitem>
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<listitem>
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<para><command>nix-env -qa --xml --meta</command> now prints
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license information.</para>
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</listitem>
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<listitem>
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<para>The maximum number of parallel TCP connections that the
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binary cache substituter will use has been decreased from 150 to
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25. This should prevent upsetting some broken NAT routers, and
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also improves performance.</para>
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</listitem>
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<listitem>
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<para>The Nix language now supports floating point numbers. They are
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based on regular C++ <literal>float</literal> and compatible with
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existing integers and number-related operations. Export and import to and
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from JSON and XML works, too.
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</para>
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</listitem>
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<listitem>
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<para>All "chroot"-containing strings got renamed to "sandbox".
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In particular, some Nix options got renamed, but the old names
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are still accepted as lower-priority aliases.
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</para>
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</listitem>
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</itemizedlist>
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<para>This release has contributions from Anders Claesson, Anthony
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Cowley, Bjørn Forsman, Brian McKenna, Danny Wilson, davidak, Eelco Dolstra,
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Fabian Schmitthenner, FrankHB, Ilya Novoselov, janus, Jim Garrison, John
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Ericson, Jude Taylor, Ludovic Courtès, Manuel Jacob, Mathnerd314,
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Pascal Wittmann, Peter Simons, Philip Potter, Preston Bennes, Rommel
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M. Martinez, Sander van der Burg, Shea Levy, Tim Cuthbertson, Tuomas
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Tynkkynen, Utku Demir and Vladimír Čunát.</para>
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</section>
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