* Release notes.
This commit is contained in:
Eelco Dolstra
parent
a9a6356ffc
commit
015ac7c7da
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@ -26,7 +26,10 @@ irreversible.</para></warning>
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<itemizedlist>
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<!-- Usability / features -->
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<listitem><para><command>nix-env</command> usability improvements:
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<itemizedlist>
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@ -66,26 +69,6 @@ irreversible.</para></warning>
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</para></listitem>
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<listitem><para>Berkeley DB 4.4’s process registry feature is used
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to recover from crashed Nix processes.</para></listitem>
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<!-- <listitem><para>TODO: shared stores.</para></listitem> -->
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<listitem><para>A performance issue has been fixed with the
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<literal>referer</literal> table, which stores the inverse of the
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<literal>references</literal> table (i.e., it tells you what store
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paths refer to a given path). Maintaining this table could take a
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quadratic amount of time, as well as a quadratic amount of Berkeley
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DB log file space (in particular when running the garbage collector)
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(<literal>NIX-23</literal>).</para></listitem>
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<listitem><para>Nix now catches the <literal>TERM</literal> and
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<literal>HUP</literal> signals in addition to the
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<literal>INT</literal> signal. So you can now do a <literal>killall
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nix-store</literal> without triggering a database
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recovery.</para></listitem>
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<listitem><para>New language features:
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<itemizedlist>
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@ -111,13 +94,13 @@ irreversible.</para></warning>
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<listitem><para>Multi-line string literals.</para></listitem>
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<listitem><para>String concatenations can now involve
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derivations, as in the example above —
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<code>"--with-freetype2-library=" + freetype + "/lib"</code>.
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This was not previously possible because we need to register
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that a derivation that uses such a string is dependent on
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<literal>freetype</literal>. The evaluator now properly
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propagates this information. Consequently, the subpath operator
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(<literal>~</literal>) has been deprecated.</para></listitem>
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derivations, as in the example <code>"--with-freetype2-library="
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+ freetype + "/lib"</code>. This was not previously possible
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because we need to register that a derivation that uses such a
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string is dependent on <literal>freetype</literal>. The
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evaluator now properly propagates this information.
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Consequently, the subpath operator (<literal>~</literal>) has
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been deprecated.</para></listitem>
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<listitem><para>Default values of function arguments can now
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refer to other function arguments; that is, all arguments are in
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@ -128,10 +111,62 @@ irreversible.</para></warning>
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<listitem><para>TODO: domain checks (r5895).</para></listitem>
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-->
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<listitem><para>Lots of new builtin primitives, such as
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functions for list manipulation and integer arithmetic. See the
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manual for a complete list. All primops are now available in
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the set <varname>builtins</varname>, allowing one to test for
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the availability of primop in a backwards-compatible
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way.</para></listitem>
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</itemizedlist>
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</para></listitem>
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<listitem><para>New commands <command>nix-pack-closure</command> and
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<command>nix-unpack-closure</command> than can be used to easily
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transfer a store path with all its dependencies to another machine.
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Very convenient whenever you have some package on your machine and
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you want to copy it somewhere else.</para></listitem>
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<listitem><para>XML support:
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<itemizedlist>
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<listitem><para><literal>nix-env -q --xml</literal> prints the
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installed or available packages in an XML representation for
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easy processing by other tools.</para></listitem>
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<listitem><para><literal>nix-instantiate --eval-only
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--xml</literal> prints an XML representation of the resulting
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term. (The new flag <option>--strict</option> forces ‘deep’
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evaluation of the result, i.e., list elements and attributes are
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evaluated recursively.)</para></listitem>
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<listitem><para>In Nix expressions, the primop
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<function>builtins.toXML</function> converts a term to an XML
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representation. This is primarily useful for passing structured
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information to builders.</para></listitem>
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</itemizedlist>
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</para></listitem>
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<listitem><para>You can now unambigously specify which derivation to
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build or install in <command>nix-env</command>,
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<command>nix-instantiate</command> and <command>nix-build</command>
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using the <option>--attr</option> / <option>-A</option> flags, which
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takes an attribute name as argument. (Unlike symbolic package names
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such as <literal>subversion-1.4.0</literal>, attribute names in an
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attribute set are unique.) For instance, a quick way to perform a
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test build of a package in Nixpkgs is <literal>nix-build
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pkgs/top-level/all-packages.nix -A
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<replaceable>foo</replaceable></literal>. <literal>nix-env -q
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--attr</literal> shows the attribute names corresponding to each
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derivation.</para></listitem>
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<listitem><para>If the top-level Nix expression used by
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<command>nix-env</command>, <command>nix-instantiate</command> or
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@ -142,26 +177,53 @@ irreversible.</para></warning>
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<replaceable>value</replaceable></option> can be used to specify
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function arguments on the command line.</para></listitem>
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<listitem><para>TODO: proxy support.</para></listitem>
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<listitem><para><literal>nix-install-package --url
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<replaceable>URL</replaceable></literal> allows a package to be
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installed directly from the given URL.</para></listitem>
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<listitem><para>New commands <command>nix-pack-closure</command> and
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<command>nix-unpack-closure</command> than can be used to easily
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transfer a store path with all its dependencies to another machine.
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Very convenient whenever you have some package on your machine and
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you want to copy it somewhere else.</para></listitem>
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<listitem><para><command>bsdiff</command> updated
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4.3.</para></listitem>
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<listitem><para>Nix now works behind an HTTP proxy server; just set
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the standard environment variables <envar>http_proxy</envar>,
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<envar>https_proxy</envar>, <envar>ftp_proxy</envar> or
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<envar>all_proxy</envar> appropriately. Functions such as
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<function>fetchurl</function> in Nixpkgs also respect these
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variables.</para></listitem>
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<listitem><para>TODO: --attr / -A flags in
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nix-env/nix-instantiate/nix-build. Also nix-env -qa
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--attr.</para></listitem>
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<listitem><para><literal>nix-build -o
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<replaceable>symlink</replaceable></literal> allows the symlink to
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the build result to be named something other than
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<literal>result</literal>.</para></listitem>
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<!-- Stability / performance / etc. -->
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<listitem><para>Platform support:
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<itemizedlist>
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<listitem><para>Support for 64-bit platforms, provided a <link
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xlink:href="http://bugzilla.sen.cwi.nl:8080/show_bug.cgi?id=606">suitably
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patched ATerm library</link> is used. Also, files larger than 2
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GiB are now supported.</para></listitem>
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<listitem><para>Added support for Cygwin (Windows,
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<literal>i686-cygwin</literal>), Mac OS X on Intel
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(<literal>i686-darwin</literal>) and Linux on PowerPC
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(<literal>powerpc-linux</literal>).</para></listitem>
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<listitem><para>Users of SMP and multicore machines will
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appreciate that the number of builds to be performed in parallel
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can now be specified in the configuration file in the
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<literal>build-max-jobs</literal> setting.</para></listitem>
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</itemizedlist>
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</para></listitem>
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<listitem><para>Garbage collector improvements:
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<itemizedlist>
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@ -188,14 +250,38 @@ irreversible.</para></warning>
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--gc</literal>). This is an easy way to get rid of all old
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packages in the Nix store.</para></listitem>
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<listitem><para><command>nix-store</command> now has an
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operation <option>--delete</option> to delete specific paths
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from the Nix store. It won’t delete reachable (non-garbage)
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paths unless <option>--ignore-liveness</option> is
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specified.</para></listitem>
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</itemizedlist>
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</para></listitem>
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<listitem><para>New command <literal>nix-store --delete</literal> to
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delete specific paths from the Nix store. It won’t delete reachable
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(non-garbage) paths unless <option>--ignore-liveness</option> is
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specified.</para></listitem>
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<listitem><para>Berkeley DB 4.4’s process registry feature is used
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to recover from crashed Nix processes.</para></listitem>
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<!-- <listitem><para>TODO: shared stores.</para></listitem> -->
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<listitem><para>A performance issue has been fixed with the
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<literal>referer</literal> table, which stores the inverse of the
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<literal>references</literal> table (i.e., it tells you what store
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paths refer to a given path). Maintaining this table could take a
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quadratic amount of time, as well as a quadratic amount of Berkeley
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DB log file space (in particular when running the garbage collector)
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(<literal>NIX-23</literal>).</para></listitem>
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<listitem><para>Nix now catches the <literal>TERM</literal> and
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<literal>HUP</literal> signals in addition to the
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<literal>INT</literal> signal. So you can now do a <literal>killall
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nix-store</literal> without triggering a database
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recovery.</para></listitem>
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<listitem><para><command>bsdiff</command> updated
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4.3.</para></listitem>
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<listitem><para>Substantial performance improvements in expression
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evaluation and <literal>nix-env -qa</literal>, all thanks to <link
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@ -225,51 +311,12 @@ irreversible.</para></warning>
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</para></listitem>
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<listitem><para>XML support:
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<itemizedlist>
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<listitem><para><literal>nix-env -q --xml</literal> prints the
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installed or available packages in an XML representation for
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easy processing by other tools.</para></listitem>
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<listitem><para><literal>nix-instantiate --eval-only
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--xml</literal> prints an XML representation of the resulting
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term. (The new flag <option>--strict</option> forces ‘deep’
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evaluation of the result, i.e., list elements and attributes are
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evaluated recursively.)</para></listitem>
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<listitem><para>In Nix expressions, the primop
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<function>builtins.toXML</function> converts a term to an XML
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representation. This is primarily useful for passing structured
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information to builders.</para></listitem>
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</itemizedlist>
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</para></listitem>
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<listitem><para>Nix source distributions are a lot smaller now since
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we no longer include a full copy of the Berkeley DB source
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distribution (but only the bits we need).</para></listitem>
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<listitem><para>Support for 64-bit platforms, provided <link
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xlink:href="http://bugzilla.sen.cwi.nl:8080/show_bug.cgi?id=606">suitably
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patched ATerm library</link> is used. Also, files larger than 2 GiB
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are now supported.</para></listitem>
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<listitem><para>Users of SMP and multicore machines will appreciate
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that the number of builds to be performed in parallel can now be
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specified in the configuration file in the
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<literal>build-max-jobs</literal> setting.</para></listitem>
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<listitem><para>Added support for Cygwin (Windows,
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<literal>i686-cygwin</literal>) and Mac OS X on Intel
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(<literal>i686-darwin</literal>).</para></listitem>
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<listitem><para>TODO: <literal>nix-push
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--target</literal>.</para></listitem>
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<listitem><para>Header files are now installed so that external
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programs can use the Nix libraries.</para></listitem>
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</itemizedlist>
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