This commit is contained in:
Eelco Dolstra
parent
4c82983010
commit
454f571f87
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@ -35,61 +35,13 @@ list:</para>
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<command>ssh</command>.</para></listitem>
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<listitem><para><command>nix-prefetch-url</command> now by default
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computes the SHA-256 hash of the file instead of the MD5 hash. In
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calls to <function>fetchurl</function> you should pass the
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<literal>sha256</literal> attribute instead of
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<literal>md5</literal>. You can pass either a hexadecimal or a
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base-32 encoding of the hash.</para></listitem>
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<listitem><para><command>nix-store</command> has a new operation
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<option>--read-log</option> (<option>-l</option>)
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<parameter>paths</parameter> that shows the build log of the given
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paths.</para></listitem>
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<listitem><para>Derivations can specify the new special attribute
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<varname>allowedReferences</varname> to enforce that the references
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in the output of a derivation are a subset of a declared set of
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paths. For example, if <varname>allowedReferences</varname> is an
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empty list, then the output must not have any references. This is
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used in NixOS to check that generated files such as initial ramdisks
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for booting Linux don’t have any dependencies.</para></listitem>
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<!--
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<listitem><para>TODO: semantic cleanups of string concatenation
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etc. (mostly in r6740).</para></listitem>
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-->
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<listitem><para>Nix now uses Berkeley DB 4.5. The database is
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upgraded automatically, but you should be careful not to use old
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versions of Nix that still use Berkeley DB 4.4.</para></listitem>
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<!-- foo
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<listitem><para>TODO: option <option>- -reregister</option> in
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<command>nix-store - -register-validity</command>.</para></listitem>
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-->
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<listitem><para>The new attribute
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<varname>exportReferencesGraph</varname> allows builders access to
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the references graph of their inputs. This is used in NixOS for
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tasks such as generating ISO-9660 images that contain a Nix store
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populated with the closure of certain paths.</para></listitem>
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<listitem><para>The option <option>--max-silent-time</option>
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(corresponding to the configuration setting
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<literal>build-max-silent-time</literal>) allows you to set a
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timeout on builds — if a build produces no output on
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<literal>stdout</literal> or <literal>stderr</literal> for the given
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number of seconds, it is terminated. This is useful for recovering
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automatically from builds that are stuck in an infinite
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loop.</para></listitem>
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<listitem><para>A new kind of string literal: strings between double
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single-quotes (<literal>''</literal>) have indentation
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“intelligently” removed. This allows large strings (such as shell
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scripts or configuration file fragments in NixOS) to cleanly follow
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the indentation of the surrounding expression. It also requires
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much less escaping, since <literal>''</literal> is less common in
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most languages than <literal>"</literal>.</para></listitem>
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<listitem><para><command>nix-env</command> <option>--set</option>
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@ -100,15 +52,6 @@ list:</para>
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<filename>browser</filename> contain just Firefox.</para></listitem>
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<listitem><para>The new option <option>--argstr</option> (in
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<command>nix-env</command>, <command>nix-instantiate</command> and
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<command>nix-build</command>) is like <option>--arg</option>, except
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that the value is a string. For example, <literal>--argstr system
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i686-linux</literal> is equivalent to <literal>--arg system
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\"i686-linux\"</literal> (note that <option>--argstr</option>
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prevents annoying quoting around shell arguments).</para></listitem>
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<listitem><para><command>nix-env</command> now maintains
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meta-information about installed packages in profiles. The
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meta-information is the contents of the <varname>meta</varname>
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@ -185,18 +128,46 @@ list:</para>
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available.</para></listitem>
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<listitem><para>Several new built-in functions:
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<function>builtins.attrNames</function>,
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<function>builtins.filterSource</function>,
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<function>builtins.isAttrs</function>,
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<function>builtins.isFunction</function>,
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<function>builtins.listToAttrs</function>,
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<function>builtins.stringLength</function>,
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<function>builtins.sub</function>,
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<function>builtins.substring</function>,
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<function>throw</function>,
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<function>builtins.trace</function>,
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<function>builtins.readFile</function>.</para></listitem>
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<listitem><para>The new option <option>--argstr</option> (in
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<command>nix-env</command>, <command>nix-instantiate</command> and
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<command>nix-build</command>) is like <option>--arg</option>, except
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that the value is a string. For example, <literal>--argstr system
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i686-linux</literal> is equivalent to <literal>--arg system
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\"i686-linux\"</literal> (note that <option>--argstr</option>
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prevents annoying quoting around shell arguments).</para></listitem>
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<listitem><para><command>nix-store</command> has a new operation
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<option>--read-log</option> (<option>-l</option>)
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<parameter>paths</parameter> that shows the build log of the given
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paths.</para></listitem>
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<!--
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<listitem><para>TODO: semantic cleanups of string concatenation
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etc. (mostly in r6740).</para></listitem>
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-->
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<listitem><para>Nix now uses Berkeley DB 4.5. The database is
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upgraded automatically, but you should be careful not to use old
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versions of Nix that still use Berkeley DB 4.4.</para></listitem>
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<!-- foo
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<listitem><para>TODO: option <option>- -reregister</option> in
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<command>nix-store - -register-validity</command>.</para></listitem>
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-->
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<listitem><para>The option <option>--max-silent-time</option>
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(corresponding to the configuration setting
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<literal>build-max-silent-time</literal>) allows you to set a
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timeout on builds — if a build produces no output on
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<literal>stdout</literal> or <literal>stderr</literal> for the given
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number of seconds, it is terminated. This is useful for recovering
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automatically from builds that are stuck in an infinite
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loop.</para></listitem>
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<listitem><para><command>nix-channel</command>: each subscribed
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@ -211,27 +182,31 @@ list:</para>
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faster.</para></listitem>
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<listitem><para><command>nix-pull</command> now supports
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bzip2-compressed manifests. This speeds up
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channels.</para></listitem>
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<listitem><para><command>nix-prefetch-url</command> now has a
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limited form of caching. This is used by
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<command>nix-channel</command> to prevent unnecessary downloads when
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the channel hasn’t changed.</para></listitem>
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<listitem><para><command>nix-prefetch-url</command> now by default
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computes the SHA-256 hash of the file instead of the MD5 hash. In
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calls to <function>fetchurl</function> you should pass the
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<literal>sha256</literal> attribute instead of
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<literal>md5</literal>. You can pass either a hexadecimal or a
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base-32 encoding of the hash.</para></listitem>
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<listitem><para>Nix can now perform builds in an automatically
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generated “chroot”. This prevents a builder from accessing stuff
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outside of the Nix store, and thus helps ensure purity. This is an
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experimental feature.</para></listitem>
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<listitem><para>A new kind of string literal: strings between double
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single-quotes (<literal>''</literal>) have indentation
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“intelligently” removed. This allows large strings (such as shell
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scripts or configuration file fragments in NixOS) to cleanly follow
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the indentation of the surrounding expression. It also requires
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much less escaping, since <literal>''</literal> is less common in
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most languages than <literal>"</literal>.</para></listitem>
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<listitem><para>The new command <command>nix-store
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--optimise</command> reduces Nix store disk space usage by finding
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identical files in the store and hard-linking them to each other.
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@ -239,7 +214,7 @@ list:</para>
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25-35%.</para></listitem>
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<listitem><para>Allow <filename>~/.nix-defexpr</filename> to be a
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<listitem><para><filename>~/.nix-defexpr</filename> can now be a
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directory, in which case the Nix expressions in that directory are
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combined into an attribute set, with the file names used as the
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names of the attributes. The command <command>nix-env
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@ -248,6 +223,22 @@ list:</para>
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removed.</para></listitem>
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<listitem><para>Derivations can specify the new special attribute
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<varname>allowedReferences</varname> to enforce that the references
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in the output of a derivation are a subset of a declared set of
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paths. For example, if <varname>allowedReferences</varname> is an
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empty list, then the output must not have any references. This is
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used in NixOS to check that generated files such as initial ramdisks
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for booting Linux don’t have any dependencies.</para></listitem>
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<listitem><para>The new attribute
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<varname>exportReferencesGraph</varname> allows builders access to
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the references graph of their inputs. This is used in NixOS for
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tasks such as generating ISO-9660 images that contain a Nix store
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populated with the closure of certain paths.</para></listitem>
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<listitem><para>Fixed-output derivations (like
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<function>fetchurl</function>) can define the attribute
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<varname>impureEnvVars</varname> to allow external environment
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@ -255,9 +246,18 @@ list:</para>
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support proxy configuration, among other things.</para></listitem>
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<listitem><para><command>nix-pull</command> now supports
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bzip2-compressed manifests. This speeds up
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channels.</para></listitem>
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<listitem><para>Several new built-in functions:
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<function>builtins.attrNames</function>,
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<function>builtins.filterSource</function>,
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<function>builtins.isAttrs</function>,
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<function>builtins.isFunction</function>,
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<function>builtins.listToAttrs</function>,
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<function>builtins.stringLength</function>,
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<function>builtins.sub</function>,
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<function>builtins.substring</function>,
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<function>throw</function>,
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<function>builtins.trace</function>,
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<function>builtins.readFile</function>.</para></listitem>
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</itemizedlist>
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