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117 lines
4.3 KiB
XML
117 lines
4.3 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-1.8">
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<title>Release 1.8 (December 9, 2014)</title>
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<itemizedlist>
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<listitem><para>Breaking change: to address a race condition, the
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remote build hook mechanism now uses <command>nix-store
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--serve</command> on the remote machine. This requires build slaves
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to be updated to Nix 1.8.</para></listitem>
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<listitem><para>Nix now uses HTTPS instead of HTTP to access the
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default binary cache,
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<literal>cache.nixos.org</literal>.</para></listitem>
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<listitem><para><command>nix-env</command> selectors are now regular
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expressions. For instance, you can do
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<screen>
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$ nix-env -qa '.*zip.*'
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</screen>
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to query all packages with a name containing
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<literal>zip</literal>.</para></listitem>
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<listitem><para><command>nix-store --read-log</command> can now
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fetch remote build logs. If a build log is not available locally,
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then ‘nix-store -l’ will now try to download it from the servers
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listed in the ‘log-servers’ option in nix.conf. For instance, if you
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have the configuration option
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<programlisting>
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log-servers = http://hydra.nixos.org/log
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</programlisting>
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then it will try to get logs from
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<literal>http://hydra.nixos.org/log/<replaceable>base name of the
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store path</replaceable></literal>. This allows you to do things like:
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<screen>
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$ nix-store -l $(which xterm)
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</screen>
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and get a log even if <command>xterm</command> wasn't built
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locally.</para></listitem>
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<listitem><para>New builtin functions:
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<function>attrValues</function>, <function>deepSeq</function>,
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<function>fromJSON</function>, <function>readDir</function>,
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<function>seq</function>.</para></listitem>
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<listitem><para><command>nix-instantiate --eval</command> now has a
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<option>--json</option> flag to print the resulting value in JSON
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format.</para></listitem>
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<listitem><para><command>nix-copy-closure</command> now uses
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<command>nix-store --serve</command> on the remote side to send or
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receive closures. This fixes a race condition between
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<command>nix-copy-closureE</command> and the garbage
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collector.</para></listitem>
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<listitem><para>Derivations can specify the new special attribute
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<varname>allowedRequisites</varname>, which has a similar meaning to
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<varname>allowedReferences</varname>. But instead of only enforcing
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to explicitly specify the immediate references, it requires the
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derivation to specify all the dependencies recursively (hence the
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name, requisites) that are used by the resulting
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output.</para></listitem>
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<listitem><para>On Mac OS X, Nix now handles case collisions when
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importing closures from case-sensitive file systems. This is mostly
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useful for running NixOps on Mac OS X.</para></listitem>
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<listitem><para>The Nix daemon has new configuration options
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<option>allowed-users</option> (specifying the users and groups that
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are allowed to connect to the daemon) and
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<option>trusted-users</option> (specifying the users and groups that
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can perform privileged operations like specifying untrusted binary
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caches).</para></listitem>
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<listitem><para>The configuration option
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<option>build-max-jobs</option> now defaults to the number of
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available CPU cores.</para></listitem>
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<listitem><para>Build users are now used by default when Nix is
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invoked as root. This prevents builds from accidentally running as
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root.</para></listitem>
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<listitem><para>Nix now includes systemd units and Upstart
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jobs.</para></listitem>
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<listitem><para>Speed improvements to <command>nix-store
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--optimise</command>.</para></listitem>
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<listitem><para>Language change: the <literal>==</literal> operator
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now ignores string contexts (the “dependencies” of a
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string).</para></listitem>
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<listitem><para>Nix now filters out Nix-specific ANSI escape
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sequences on standard error. They are supposed to be invisible, but
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some terminals show them anyway.</para></listitem>
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<listitem><para>Various commands now automatically pipe their output
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into the pager as specified by the <envar>PAGER</envar> environment
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variable.</para></listitem>
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<listitem><para>Several improvements to reduce memory consumption in
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the evaluator.</para></listitem>
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</itemizedlist>
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</section>
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