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Eelco Dolstra 2007-12-31 01:22:09 +00:00
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commit 454f571f87
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178
doc/manual/release-notes.xml
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@ -35,61 +35,13 @@ list:</para>
<command>ssh</command>.</para></listitem> <command>ssh</command>.</para></listitem>
<listitem><para><command>nix-prefetch-url</command> now by default <listitem><para>A new kind of string literal: strings between double
computes the SHA-256 hash of the file instead of the MD5 hash. In single-quotes (<literal>''</literal>) have indentation
calls to <function>fetchurl</function> you should pass the “intelligently” removed. This allows large strings (such as shell
<literal>sha256</literal> attribute instead of scripts or configuration file fragments in NixOS) to cleanly follow
<literal>md5</literal>. You can pass either a hexadecimal or a the indentation of the surrounding expression. It also requires
base-32 encoding of the hash.</para></listitem> much less escaping, since <literal>''</literal> is less common in
most languages than <literal>"</literal>.</para></listitem>
<listitem><para><command>nix-store</command> has a new operation
<option>--read-log</option> (<option>-l</option>)
<parameter>paths</parameter> that shows the build log of the given
paths.</para></listitem>
<listitem><para>Derivations can specify the new special attribute
<varname>allowedReferences</varname> to enforce that the references
in the output of a derivation are a subset of a declared set of
paths. For example, if <varname>allowedReferences</varname> is an
empty list, then the output must not have any references. This is
used in NixOS to check that generated files such as initial ramdisks
for booting Linux don’t have any dependencies.</para></listitem>
<!--
<listitem><para>TODO: semantic cleanups of string concatenation
etc. (mostly in r6740).</para></listitem>
-->
<listitem><para>Nix now uses Berkeley DB 4.5. The database is
upgraded automatically, but you should be careful not to use old
versions of Nix that still use Berkeley DB 4.4.</para></listitem>
<!-- foo
<listitem><para>TODO: option <option>- -reregister</option> in
<command>nix-store - -register-validity</command>.</para></listitem>
-->
<listitem><para>The new attribute
<varname>exportReferencesGraph</varname> allows builders access to
the references graph of their inputs. This is used in NixOS for
tasks such as generating ISO-9660 images that contain a Nix store
populated with the closure of certain paths.</para></listitem>
<listitem><para>The option <option>--max-silent-time</option>
(corresponding to the configuration setting
<literal>build-max-silent-time</literal>) allows you to set a
timeout on builds — if a build produces no output on
<literal>stdout</literal> or <literal>stderr</literal> for the given
number of seconds, it is terminated. This is useful for recovering
automatically from builds that are stuck in an infinite
loop.</para></listitem>
<listitem><para><command>nix-env</command> <option>--set</option> <listitem><para><command>nix-env</command> <option>--set</option>
@ -100,15 +52,6 @@ list:</para>
<filename>browser</filename> contain just Firefox.</para></listitem> <filename>browser</filename> contain just Firefox.</para></listitem>
<listitem><para>The new option <option>--argstr</option> (in
<command>nix-env</command>, <command>nix-instantiate</command> and
<command>nix-build</command>) is like <option>--arg</option>, except
that the value is a string. For example, <literal>--argstr system
i686-linux</literal> is equivalent to <literal>--arg system
\"i686-linux\"</literal> (note that <option>--argstr</option>
prevents annoying quoting around shell arguments).</para></listitem>
<listitem><para><command>nix-env</command> now maintains <listitem><para><command>nix-env</command> now maintains
meta-information about installed packages in profiles. The meta-information about installed packages in profiles. The
meta-information is the contents of the <varname>meta</varname> meta-information is the contents of the <varname>meta</varname>
@ -185,18 +128,46 @@ list:</para>
available.</para></listitem> available.</para></listitem>
<listitem><para>Several new built-in functions: <listitem><para>The new option <option>--argstr</option> (in
<function>builtins.attrNames</function>, <command>nix-env</command>, <command>nix-instantiate</command> and
<function>builtins.filterSource</function>, <command>nix-build</command>) is like <option>--arg</option>, except
<function>builtins.isAttrs</function>, that the value is a string. For example, <literal>--argstr system
<function>builtins.isFunction</function>, i686-linux</literal> is equivalent to <literal>--arg system
<function>builtins.listToAttrs</function>, \"i686-linux\"</literal> (note that <option>--argstr</option>
<function>builtins.stringLength</function>, prevents annoying quoting around shell arguments).</para></listitem>
<function>builtins.sub</function>,
<function>builtins.substring</function>,
<function>throw</function>, <listitem><para><command>nix-store</command> has a new operation
<function>builtins.trace</function>, <option>--read-log</option> (<option>-l</option>)
<function>builtins.readFile</function>.</para></listitem> <parameter>paths</parameter> that shows the build log of the given
paths.</para></listitem>
<!--
<listitem><para>TODO: semantic cleanups of string concatenation
etc. (mostly in r6740).</para></listitem>
-->
<listitem><para>Nix now uses Berkeley DB 4.5. The database is
upgraded automatically, but you should be careful not to use old
versions of Nix that still use Berkeley DB 4.4.</para></listitem>
<!-- foo
<listitem><para>TODO: option <option>- -reregister</option> in
<command>nix-store - -register-validity</command>.</para></listitem>
-->
<listitem><para>The option <option>--max-silent-time</option>
(corresponding to the configuration setting
<literal>build-max-silent-time</literal>) allows you to set a
timeout on builds — if a build produces no output on
<literal>stdout</literal> or <literal>stderr</literal> for the given
number of seconds, it is terminated. This is useful for recovering
automatically from builds that are stuck in an infinite
loop.</para></listitem>
<listitem><para><command>nix-channel</command>: each subscribed <listitem><para><command>nix-channel</command>: each subscribed
@ -211,27 +182,31 @@ list:</para>
faster.</para></listitem> faster.</para></listitem>
<listitem><para><command>nix-pull</command> now supports
bzip2-compressed manifests. This speeds up
channels.</para></listitem>
<listitem><para><command>nix-prefetch-url</command> now has a <listitem><para><command>nix-prefetch-url</command> now has a
limited form of caching. This is used by limited form of caching. This is used by
<command>nix-channel</command> to prevent unnecessary downloads when <command>nix-channel</command> to prevent unnecessary downloads when
the channel hasn’t changed.</para></listitem> the channel hasn’t changed.</para></listitem>
<listitem><para><command>nix-prefetch-url</command> now by default
computes the SHA-256 hash of the file instead of the MD5 hash. In
calls to <function>fetchurl</function> you should pass the
<literal>sha256</literal> attribute instead of
<literal>md5</literal>. You can pass either a hexadecimal or a
base-32 encoding of the hash.</para></listitem>
<listitem><para>Nix can now perform builds in an automatically <listitem><para>Nix can now perform builds in an automatically
generated “chroot”. This prevents a builder from accessing stuff generated “chroot”. This prevents a builder from accessing stuff
outside of the Nix store, and thus helps ensure purity. This is an outside of the Nix store, and thus helps ensure purity. This is an
experimental feature.</para></listitem> experimental feature.</para></listitem>
<listitem><para>A new kind of string literal: strings between double
single-quotes (<literal>''</literal>) have indentation
“intelligently” removed. This allows large strings (such as shell
scripts or configuration file fragments in NixOS) to cleanly follow
the indentation of the surrounding expression. It also requires
much less escaping, since <literal>''</literal> is less common in
most languages than <literal>"</literal>.</para></listitem>
<listitem><para>The new command <command>nix-store <listitem><para>The new command <command>nix-store
--optimise</command> reduces Nix store disk space usage by finding --optimise</command> reduces Nix store disk space usage by finding
identical files in the store and hard-linking them to each other. identical files in the store and hard-linking them to each other.
@ -239,7 +214,7 @@ list:</para>
25-35%.</para></listitem> 25-35%.</para></listitem>
<listitem><para>Allow <filename>~/.nix-defexpr</filename> to be a <listitem><para><filename>~/.nix-defexpr</filename> can now be a
directory, in which case the Nix expressions in that directory are directory, in which case the Nix expressions in that directory are
combined into an attribute set, with the file names used as the combined into an attribute set, with the file names used as the
names of the attributes. The command <command>nix-env names of the attributes. The command <command>nix-env
@ -248,6 +223,22 @@ list:</para>
removed.</para></listitem> removed.</para></listitem>
<listitem><para>Derivations can specify the new special attribute
<varname>allowedReferences</varname> to enforce that the references
in the output of a derivation are a subset of a declared set of
paths. For example, if <varname>allowedReferences</varname> is an
empty list, then the output must not have any references. This is
used in NixOS to check that generated files such as initial ramdisks
for booting Linux don’t have any dependencies.</para></listitem>
<listitem><para>The new attribute
<varname>exportReferencesGraph</varname> allows builders access to
the references graph of their inputs. This is used in NixOS for
tasks such as generating ISO-9660 images that contain a Nix store
populated with the closure of certain paths.</para></listitem>
<listitem><para>Fixed-output derivations (like <listitem><para>Fixed-output derivations (like
<function>fetchurl</function>) can define the attribute <function>fetchurl</function>) can define the attribute
<varname>impureEnvVars</varname> to allow external environment <varname>impureEnvVars</varname> to allow external environment
@ -255,9 +246,18 @@ list:</para>
support proxy configuration, among other things.</para></listitem> support proxy configuration, among other things.</para></listitem>
<listitem><para><command>nix-pull</command> now supports <listitem><para>Several new built-in functions:
bzip2-compressed manifests. This speeds up <function>builtins.attrNames</function>,
channels.</para></listitem> <function>builtins.filterSource</function>,
<function>builtins.isAttrs</function>,
<function>builtins.isFunction</function>,
<function>builtins.listToAttrs</function>,
<function>builtins.stringLength</function>,
<function>builtins.sub</function>,
<function>builtins.substring</function>,
<function>throw</function>,
<function>builtins.trace</function>,
<function>builtins.readFile</function>.</para></listitem>
</itemizedlist> </itemizedlist>