432 lines
15 KiB
XML
432 lines
15 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-2.0">
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<title>Release 2.0 (2018-02-??)</title>
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<para>This release has the following new features:</para>
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<itemizedlist>
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<listitem>
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<para>Start of new <command>nix</command> command line
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interface. This is a work in progress and the interface is subject
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to change.</para>
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<itemizedlist>
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<listitem><para>Self-documenting: <option>--help</option> shows
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all available command-line arguments.</para></listitem>
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<listitem><para><option>--help-config</option> shows all
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configuration options.</para></listitem>
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<listitem><para><command>nix build</command>: Replacement for
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<command>nix-build</command>.</para></listitem>
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<listitem><para><command>nix ls-store</command> and <command>nix
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ls-nar</command> allow listing the contents of a store path or
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NAR file.</para></listitem>
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<listitem><para><command>nix cat-store</command> and
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<command>nix cat-nar</command> allow extracting a file from a
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store path or NAR file.</para></listitem>
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<listitem><para><command>nix verify</command> checks whether a
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store path is unmodified and/or is trusted.</para></listitem>
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<listitem><para><command>nix copy-sigs</command> copies
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signatures from one store to another.</para></listitem>
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<listitem><para><command>nix sign-paths</command> signs store
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paths.</para></listitem>
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<listitem><para><command>nix copy</command> copies paths between
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arbitrary Nix stores, generalising
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<command>nix-copy-closure</command> and
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<command>nix-push</command>.</para></listitem>
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<listitem><para><command>nix path-info</command> shows
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information about store paths.</para></listitem>
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<listitem><para><command>nix run</command> starts a shell in
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which the specified packages are available.</para></listitem>
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<listitem><para><command>nix log</command> shows the build log
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of a package or path. If the build log is not available locally,
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it will try to obtain it from a binary cache.</para></listitem>
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<listitem><para><command>nix eval</command> replaces
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<command>nix-instantiate --eval</command>.</para></listitem>
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<listitem><para><command>nix dump-path</command> to get a NAR
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from a store path.</para></listitem>
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<listitem><para><command>nix edit</command> opens the source
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code of a package in an editor.</para></listitem>
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<listitem><para><command>nix search</command> replaces
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<command>nix-env -qa</command>. It searches the available
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packages for occurences of a search string in the attribute
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name, package name or description. It caches available packages
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to speed up searches.</para></listitem>
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<listitem><para><command>nix why-depends</command> (d41c5eb13f4f3a37d80dbc6d3888644170c3b44a).</para></listitem>
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<listitem><para><command>nix show-derivation</command> (e8d6ee7c1b90a2fe6d824f1a875acc56799ae6e2).</para></listitem>
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<listitem><para><command>nix add-to-store</command> (970366266b8df712f5f9cedb45af183ef5a8357f).</para></listitem>
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<listitem><para><command>nix upgrade-nix</command> upgrades Nix
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to the latest stable version. This requires that Nix is
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installed in a profile. (Thus it won’t work on NixOS, or if it’s
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installed outside of the Nix store.)</para></listitem>
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<listitem><para>Progress indicator.</para></listitem>
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<listitem><para>All options are available as flags now
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(b8283773bd64d7da6859ed520ee19867742a03ba).</para></listitem>
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</itemizedlist>
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</listitem>
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<listitem>
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<para>The external program <command>nix-repl</command> has been
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integrated into Nix as <command>nix repl</command>.</para>
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</listitem>
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<listitem>
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<para>New build mode <command>nix-build --hash</command> that
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builds a derivation, computes the hash of the output, and moves
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the output to the store path corresponding to what a fixed-output
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derivation with that hash would produce.
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(Add docs and examples; see d367b8e7875161e655deaa96bf8a5dd0bcf8229e)</para>
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</listitem>
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<listitem>
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<para>It is no longer necessary to set the
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<envar>NIX_REMOTE</envar> environment variable if you need to use
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the Nix daemon. Nix will use the daemon automatically if you don’t
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have write access to the Nix database.</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.</para>
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</listitem>
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<listitem>
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<para><command>nix-shell</command> now sets the
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<varname>IN_NIX_SHELL</varname> environment variable during
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evaluation and in the shell itself. This can be used to perform
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different actions depending on whether you’re in a Nix shell or in
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a regular build. Nixpkgs provides
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<varname>lib.inNixShell</varname> to check this variable during
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evaluation. (bb36a1a3cf3fbe6bc9d0afcc5fa0f928bed03170)</para>
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</listitem>
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<listitem>
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<para>Internal: all <classname>Store</classname> classes are now
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thread-safe. <classname>RemoteStore</classname> supports multiple
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concurrent connections to the daemon. This is primarily useful in
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multi-threaded programs such as
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<command>hydra-queue-runner</command>.</para>
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</listitem>
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<listitem>
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<para>The dependency on Perl has been removed. As a result, some
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(obsolete) programs have been removed: <command>nix-push</command>
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(replaced by <command>nix copy</command>),
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<command>nix-pull</command> (obsoleted by binary caches),
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<command>nix-generate-patches</command>,
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<command>bsdiff</command>, <command>bspatch</command>.</para>
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</listitem>
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<listitem>
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<para>Improved store abstraction. Substituters
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eliminated. BinaryCacheStore, LocalBinaryCacheStore,
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HttpBinaryCacheStore, S3BinaryCacheStore (compile-time
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optional), SSHStore. Add docs + examples?
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</para>
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</listitem>
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<listitem>
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<para>Nix now stores signatures for local store
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paths. Locally-built paths are now signed automatically using the
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secret keys specified by the <option>secret-key-files</option>
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store option.</para>
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<para>In addition, store paths that have been built locally are
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marked as “ultimately trusted”, and content-addressable store
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paths carry a “content-addressability assertion” that allow them
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to be trusted without any signatures.</para>
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</listitem>
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<listitem>
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<para><envar>NIX_PATH</envar> is now lazy, so URIs in the path are
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only downloaded if they are needed for evaluation.</para>
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</listitem>
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<listitem>
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<para>You can now use
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<uri>channel:<replaceable>channel-name</replaceable></uri> as a
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short-hand for
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<uri>https://nixos.org/channels/<replaceable>channel-name</replaceable>/nixexprs.tar.xz</uri>. For
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example, <literal>nix-build channel:nixos-15.09 -A hello</literal>
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will build the GNU Hello package from the
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<literal>nixos-15.09</literal> channel.</para>
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</listitem>
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<listitem>
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<para>When <option>--no-build-output</option> is given, the last
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10 lines of the build log will be shown if a build
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fails.</para>
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</listitem>
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<listitem>
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<para><function>builtins.fetchGit</function>.
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(38539b943a060d9cdfc24d6e5d997c0885b8aa2f)</para>
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</listitem>
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<listitem>
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<para><literal><nix/fetchurl.nix></literal> now uses the
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content-addressable tarball cache at
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<uri>http://tarballs.nixos.org/</uri>, just like
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<function>fetchurl</function> in
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Nixpkgs. (f2682e6e18a76ecbfb8a12c17e3a0ca15c084197)</para>
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</listitem>
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<listitem>
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<para>Chroot Nix stores: allow the “physical” location of the Nix
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store (e.g. <filename>/home/alice/nix/store</filename>) to differ
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from its “logical” location (typically
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<filename>/nix/store</filename>). This allows non-root users to
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use Nix while still getting the benefits from prebuilt binaries
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from
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<uri>cache.nixos.org</uri>. (4494000e04122f24558e1436e66d20d89028b4bd,
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3eb621750848e0e6b30e5a79f76afbb096bb6c8a)</para>
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</listitem>
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<listitem>
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<para>On Linux, builds are now executed in a user
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namespace with uid 1000 and gid 100.</para>
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</listitem>
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<listitem>
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<para><function>builtins.fetchurl</function> and
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<function>builtins.fetchTarball</function> now support
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<varname>sha256</varname> and <varname>name</varname>
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attributes.</para>
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</listitem>
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<listitem>
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<para><literal>HttpBinaryCacheStore</literal> (the replacement of
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<command>download-from-binary-cache</command>) now retries
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automatically on certain HTTP error codes.</para>
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</listitem>
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<listitem>
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<para>Derivation attributes can now reference the outputs of the
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derivation using the <function>placeholder</function> builtin
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function. For example, the attribute
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<programlisting>
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configureFlags = "--prefix=${placeholder "out"} --includedir=${placeholder "dev"}";
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</programlisting>
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will cause the <envar>configureFlags</envar> environment variable
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to contain the actual store paths corresponding to the
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<literal>out</literal> and <literal>dev</literal> outputs. TODO:
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add docs.</para>
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</listitem>
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<listitem>
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<para>Support for HTTP/2. This makes binary cache lookups much
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more efficient. (90ad02bf626b885a5dd8967894e2eafc953bdf92)</para>
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</listitem>
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<listitem>
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<para>The <option>build-sandbox-paths</option> configuration
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option can now specify optional paths by appending a
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<literal>?</literal>, e.g. <literal>/dev/nvidiactl?</literal> will
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bind-mount <varname>/dev/nvidiactl</varname> only if it
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exists.</para>
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</listitem>
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<listitem>
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<para>More support for testing build reproducibility: when
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<option>enforce-determinism</option> is set to
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<literal>false</literal>, it’s no longer a fatal error build
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rounds produce different output
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(8bdf83f936adae6f2c907a6d2541e80d4120f051); add a hook to run
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diffoscope when build rounds produce different output
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(9a313469a4bdea2d1e8df24d16289dc2a172a169w).</para>
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</listitem>
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<listitem>
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<para>Kill builds as soon as stdout/stderr is closed. This fixes a
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bug that allowed builds to hang Nix indefinitely (regardless of
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timeouts). (21948deed99a3295e4d5666e027a6ca42dc00b40)</para>
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</listitem>
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<listitem>
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<para>Add support for passing structured data to builders. TODO:
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document. (6de33a9c675b187437a2e1abbcb290981a89ecb1)</para>
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</listitem>
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<listitem>
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<para><varname>exportReferencesGraph</varname>: Export more
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complete info in JSON
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format. (c2b0d8749f7e77afc1c4b3e8dd36b7ee9720af4a)</para>
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</listitem>
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<listitem>
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<para>Support for
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netrc. (e6e74f987f0fa284d220432d426eb965269a97d6,
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302386f775eea309679654e5ea7c972fb6e7b9af)</para>
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</listitem>
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<listitem>
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<para>Support <uri>s3://</uri> URIs in all places where Nix allows
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URIs. (9ff9c3f2f80ba4108e9c945bbfda2c64735f987b)</para>
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</listitem>
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<listitem>
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<para>The <option>build-max-jobs</option> option can be set to
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<literal>auto</literal> to use the number of CPUs in the
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system. (7251d048fa812d2551b7003bc9f13a8f5d4c95a5)</para>
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</listitem>
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<listitem>
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<para>Add support for Brotli compression.
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<uri>cache.nixos.org</uri> compresses build logs using
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Brotli.</para>
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</listitem>
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<listitem>
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<para>Substitutions from binary caches now require signatures by
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default. This was already the case on
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NixOS. (ecbc3fedd3d5bdc5a0e1a0a51b29062f2874ac8b)</para>
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</listitem>
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<listitem>
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<para><command>nix-env</command> now ignores packages with bad
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derivation names (in particular those starting with a digit or
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containing a
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dot). (b0cb11722626e906a73f10dd9a0c9eea29faf43a)</para>
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</listitem>
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<listitem>
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<para>Renamed various configuration options. (TODO: in progress)</para>
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</listitem>
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<listitem>
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<para>Remote machines can now be specified on the command
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line. TODO:
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document. (1a68710d4dff609bbaf61db3e17a2573f0aadf17)</para>
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</listitem>
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<listitem>
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<para>In Linux sandbox builds, we now use
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<filename>/build</filename> instead of <filename>/tmp</filename>
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as the temporary build directory. This fixes potential security
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problems when a build accidentally stores its
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<envar>TMPDIR</envar> in some critical place, such as an
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RPATH. (eba840c8a13b465ace90172ff76a0db2899ab11b)</para>
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</listitem>
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<listitem>
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<para>In Linux sandbox builds, we now provide a default
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<filename>/bin/sh</filename> (namely <filename>ash</filename> from
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BusyBox). (a2d92bb20e82a0957067ede60e91fab256948b41)</para>
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</listitem>
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<listitem>
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<para>Make all configuration options available as command line
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flags (b8283773bd64d7da6859ed520ee19867742a03ba).</para>
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</listitem>
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<listitem>
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<para>Support base-64
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hashes. (c0015e87af70f539f24d2aa2bc224a9d8b84276b)</para>
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</listitem>
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<listitem>
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<para><command>nix-shell</command> now uses
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<varname>bashInteractive</varname> from Nixpkgs, rather than the
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<command>bash</command> command that happens to be in the caller’s
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<envar>PATH</envar>. This is especially important on macOS where
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the <command>bash</command> provided by the system is seriously
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outdated and cannot execute <literal>stdenv</literal>’s setup
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script.</para>
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</listitem>
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<listitem>
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<para>New builtin functions: <function>builtins.split</function>
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(b8867a0239b1930a16f9ef3f7f3e864b01416dff),
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<function>builtins.partition</function>.</para>
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</listitem>
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<listitem>
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<para>Automatic garbage collection.</para>
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</listitem>
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<listitem>
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<para><command>nix-store -q --roots</command> and
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<command>nix-store --gc --print-roots</command> now show temporary
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and in-memory roots.</para>
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</listitem>
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<listitem>
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<para>Builders can now communicate what build phase they are in by
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writing messages to the file descriptor specified in
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<envar>NIX_LOG_FD</envar>. (88e6bb76de5564b3217be9688677d1c89101b2a3)
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</para>
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</listitem>
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</itemizedlist>
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<para>Some features were removed:</para>
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<itemizedlist>
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<listitem>
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<para>“Nested” log output. As a result,
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<command>nix-log2xml</command> was also removed.</para>
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</listitem>
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<listitem>
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<para>OpenSSL-based signing. (f435f8247553656774dd1b2c88e9de5d59cab203)</para>
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</listitem>
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<listitem>
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<para>Caching of failed
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builds. (8cffec84859cec8b610a2a22ab0c4d462a9351ff)</para>
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</listitem>
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<listitem>
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<para><filename>nix-mode.el</filename> has been removed from
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Nix. It is now a separate repository in
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<uri>https://github.com/NixOS/nix-mode</uri> and can be installed
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through the MELPA package repository.</para>
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</listitem>
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<listitem>
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<para>In restricted evaluation mode
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(<option>--restrict-eval</option>), builtin functions that
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download from the network (such as <function>fetchGit</function>)
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are permitted to fetch underneath the list of URI prefixes
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specified in the option <option>allowed-uris</option>.</para>
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</listitem>
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</itemizedlist>
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<para>This release has contributions from TBD.</para>
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</section>
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