mirror of
https://github.com/ilyakooo0/nixpkgs.git
synced 2024-09-11 07:15:54 +03:00
Add a way to pin a NixOS version within the module system.
This modification add a way to re-evaluate the module system with a different version of NixOS, or with a different set of arguments.
This commit is contained in:
parent
bd33a41493
commit
a5992ad61b
@ -1,12 +1,20 @@
|
||||
{ configuration ? import ./lib/from-env.nix "NIXOS_CONFIG" <nixos-config>
|
||||
, system ? builtins.currentSystem
|
||||
, extraModules ? []
|
||||
# This attribute is used to specify a different nixos version, a different
|
||||
# system or additional modules which might be set conditionally.
|
||||
, reEnter ? false
|
||||
}:
|
||||
|
||||
let
|
||||
reEnterModule = {
|
||||
config.nixos.path = with (import ../lib); mkIf reEnter (mkForce null);
|
||||
config.nixos.configuration = configuration;
|
||||
};
|
||||
|
||||
eval = import ./lib/eval-config.nix {
|
||||
inherit system;
|
||||
modules = [ configuration ];
|
||||
modules = [ configuration reEnterModule ] ++ extraModules;
|
||||
};
|
||||
|
||||
inherit (eval) pkgs;
|
||||
@ -14,14 +22,14 @@ let
|
||||
# This is for `nixos-rebuild build-vm'.
|
||||
vmConfig = (import ./lib/eval-config.nix {
|
||||
inherit system;
|
||||
modules = [ configuration ./modules/virtualisation/qemu-vm.nix ];
|
||||
modules = [ configuration reEnterModule ./modules/virtualisation/qemu-vm.nix ] ++ extraModules;
|
||||
}).config;
|
||||
|
||||
# This is for `nixos-rebuild build-vm-with-bootloader'.
|
||||
vmWithBootLoaderConfig = (import ./lib/eval-config.nix {
|
||||
inherit system;
|
||||
modules =
|
||||
[ configuration
|
||||
[ configuration reEnterModule
|
||||
./modules/virtualisation/qemu-vm.nix
|
||||
{ virtualisation.useBootLoader = true; }
|
||||
];
|
||||
@ -30,7 +38,7 @@ let
|
||||
in
|
||||
|
||||
{
|
||||
inherit (eval) config options;
|
||||
inherit (eval.config.nixos.reflect) config options;
|
||||
|
||||
system = eval.config.system.build.toplevel;
|
||||
|
||||
|
@ -26,6 +26,7 @@ effect after you run <command>nixos-rebuild</command>.</para>
|
||||
|
||||
<!-- FIXME: auto-include NixOS module docs -->
|
||||
<xi:include href="postgresql.xml" />
|
||||
<xi:include href="nixos.xml" />
|
||||
|
||||
<!-- Apache; libvirtd virtualisation -->
|
||||
|
||||
|
@ -55,6 +55,7 @@ let
|
||||
cp -prd $sources/* . # */
|
||||
chmod -R u+w .
|
||||
cp ${../../modules/services/databases/postgresql.xml} configuration/postgresql.xml
|
||||
cp ${../../modules/misc/nixos.xml} configuration/nixos.xml
|
||||
ln -s ${optionsDocBook} options-db.xml
|
||||
echo "${version}" > version
|
||||
'';
|
||||
|
@ -6,6 +6,26 @@
|
||||
|
||||
<title>Unstable</title>
|
||||
|
||||
<para>In addition to numerous new and upgraded packages, this release
|
||||
has the following highlights:</para>
|
||||
|
||||
<itemizedlist>
|
||||
|
||||
<listitem>
|
||||
<para>You can now pin a specific version of NixOS in your <filename>configuration.nix</filename>
|
||||
by setting:
|
||||
|
||||
<programlisting>
|
||||
nixos.path = ./nixpkgs-unstable-2015-12-06/nixos;
|
||||
</programlisting>
|
||||
|
||||
This will make NixOS re-evaluate your configuration with the modules of
|
||||
the specified NixOS version at the given path. For more details, see
|
||||
<xref linkend="module-misc-nixos" /></para>
|
||||
</listitem>
|
||||
|
||||
</itemizedlist>
|
||||
|
||||
<para>When upgrading from a previous release, please be aware of the
|
||||
following incompatible changes:</para>
|
||||
|
||||
|
82
nixos/modules/misc/nixos.nix
Normal file
82
nixos/modules/misc/nixos.nix
Normal file
@ -0,0 +1,82 @@
|
||||
{ config, options, lib, ... }:
|
||||
|
||||
# This modules is used to inject a different NixOS version as well as its
|
||||
# argument such that one can pin a specific version with the versionning
|
||||
# system of the configuration.
|
||||
let
|
||||
nixosReentry = import config.nixos.path {
|
||||
inherit (config.nixos) configuration extraModules;
|
||||
inherit (config.nixpkgs) system;
|
||||
reEnter = true;
|
||||
};
|
||||
in
|
||||
|
||||
with lib;
|
||||
|
||||
{
|
||||
options = {
|
||||
nixos.path = mkOption {
|
||||
default = null;
|
||||
example = literalExample "./nixpkgs-15.09/nixos";
|
||||
type = types.nullOr types.path;
|
||||
description = ''
|
||||
This option give the ability to evaluate the current set of modules
|
||||
with a different version of NixOS. This option can be used version
|
||||
the version of NixOS with the configuration without relying on the
|
||||
<literal>NIX_PATH</literal> environment variable.
|
||||
'';
|
||||
};
|
||||
|
||||
nixos.system = mkOption {
|
||||
example = "i686-linux";
|
||||
type = types.uniq types.str;
|
||||
description = ''
|
||||
Name of the system used to compile NixOS.
|
||||
'';
|
||||
};
|
||||
|
||||
nixos.extraModules = mkOption {
|
||||
default = [];
|
||||
example = literalExample "mkIf config.services.openssh.enable [ ./sshd-config.nix ]";
|
||||
type = types.listOf types.unspecified;
|
||||
description = ''
|
||||
Define additional modules which would be loaded to evaluate the
|
||||
configuration.
|
||||
'';
|
||||
};
|
||||
|
||||
nixos.configuration = mkOption {
|
||||
type = types.unspecified;
|
||||
internal = true;
|
||||
description = ''
|
||||
Option used by <filename>nixos/default.nix</filename> to re-inject
|
||||
the same configuration module as the one used for the current
|
||||
execution.
|
||||
'';
|
||||
};
|
||||
|
||||
nixos.reflect = mkOption {
|
||||
default = { inherit config options; };
|
||||
type = types.unspecified;
|
||||
internal = true;
|
||||
description = ''
|
||||
Provides <literal>config</literal> and <literal>options</literal>
|
||||
computed by the module system and given as argument to all
|
||||
modules. These are used for introspection of options and
|
||||
configuration by tools such as <literal>nixos-option</literal>.
|
||||
'';
|
||||
};
|
||||
};
|
||||
|
||||
config = mkMerge [
|
||||
(mkIf (config.nixos.path != null) (mkForce {
|
||||
system.build.toplevel = nixosReentry.system;
|
||||
system.build.vm = nixosReentry.vm;
|
||||
nixos.reflect = { inherit (nixosReentry) config options; };
|
||||
}))
|
||||
|
||||
{ meta.maintainers = singleton lib.maintainers.pierron;
|
||||
meta.doc = ./nixos.xml;
|
||||
}
|
||||
];
|
||||
}
|
84
nixos/modules/misc/nixos.xml
Normal file
84
nixos/modules/misc/nixos.xml
Normal file
@ -0,0 +1,84 @@
|
||||
<chapter xmlns="http://docbook.org/ns/docbook"
|
||||
xmlns:xlink="http://www.w3.org/1999/xlink"
|
||||
xmlns:xi="http://www.w3.org/2001/XInclude"
|
||||
version="5.0"
|
||||
xml:id="module-misc-nixos">
|
||||
|
||||
<title>NixOS Reentry</title>
|
||||
|
||||
<!-- FIXME: render nicely -->
|
||||
|
||||
<!-- FIXME: source can be added automatically -->
|
||||
<para><emphasis>Source:</emphasis> <filename>modules/misc/nixos.nix</filename></para>
|
||||
|
||||
<!-- FIXME: more stuff, like maintainer? -->
|
||||
|
||||
<para>NixOS reentry can be used for both pinning the evaluation to a
|
||||
specific version of NixOS, and to dynamically add additional modules into
|
||||
the Module evaluation.</para>
|
||||
|
||||
<section><title>NixOS Version Pinning</title>
|
||||
|
||||
<para>To pin a specific version of NixOS, you need a version that you can
|
||||
either clone localy, or that you can fetch remotely.</para>
|
||||
|
||||
<para>If you already have a cloned version of NixOS in the directory
|
||||
<filename>/etc/nixos/nixpkgs-16-03</filename>, then you can specify the
|
||||
<option>nixos.path</option> with either the path or the relative path of
|
||||
your NixOS clone. For example, you can add the following to your
|
||||
<filename>/etc/nixos/configuration.nix</filename> file:
|
||||
|
||||
<programlisting>
|
||||
nixos.path = ./nixpkgs-16-03/nixos;
|
||||
</programlisting>
|
||||
</para>
|
||||
|
||||
<para>Another option is to fetch a specific version of NixOS, with either
|
||||
the <literal>fetchTarball</literal> builtin, or the
|
||||
<literal>pkgs.fetchFromGithub</literal> function and use the result as an
|
||||
input.
|
||||
|
||||
<programlisting>
|
||||
nixos.path = "${builtins.fetchTarball https://github.com/NixOS/nixpkgs/archive/1f27976e03c15183191d1b4aa1a40d1f14666cd2.tar.gz}/nixos";
|
||||
</programlisting>
|
||||
</para>
|
||||
|
||||
</section>
|
||||
|
||||
|
||||
<section><title>Adding Module Dynamically</title>
|
||||
|
||||
<para>To add additional module, the recommended way is to use statically
|
||||
known modules in the list of imported arguments as described in <xref
|
||||
linkend="sec-modularity" />. Unfortunately, this recommended method has
|
||||
limitation, such that the list of imported files cannot be selected based on
|
||||
the content of the configuration.
|
||||
|
||||
Fortunately, NixOS reentry system can be used as an alternative to register
|
||||
new imported modules based on the content of the configuration. To do so,
|
||||
one should define both <option>nixos.path</option> and
|
||||
<option>nixos.extraModules</option> options.
|
||||
|
||||
<programlisting>
|
||||
nixos.path = <nixos>;
|
||||
nixos.extraModules =
|
||||
if config.networking.hostName == "server" then
|
||||
[ ./server.nix ] else [ ./client.nix ];
|
||||
</programlisting>
|
||||
|
||||
Also note, that the above can be reimplemented in a different way which is
|
||||
not as expensive, by using <literal>mkIf</literal> at the top each
|
||||
configuration if both modules are present on the file system (see <xref
|
||||
linkend="sec-option-definitions" />) and by always inmporting both
|
||||
modules.</para>
|
||||
|
||||
</section>
|
||||
|
||||
<section><title>Options</title>
|
||||
|
||||
<para>FIXME: auto-generated list of module options.</para>
|
||||
|
||||
</section>
|
||||
|
||||
|
||||
</chapter>
|
@ -52,6 +52,7 @@
|
||||
./misc/lib.nix
|
||||
./misc/locate.nix
|
||||
./misc/meta.nix
|
||||
./misc/nixos.nix
|
||||
./misc/nixpkgs.nix
|
||||
./misc/passthru.nix
|
||||
./misc/version.nix
|
||||
|
@ -276,6 +276,7 @@ in rec {
|
||||
tests.networkingProxy = callTest tests/networking-proxy.nix {};
|
||||
tests.nfs3 = callTest tests/nfs.nix { version = 3; };
|
||||
tests.nfs4 = callTest tests/nfs.nix { version = 4; };
|
||||
tests.nixosPinVersion = callTest tests/nixos-pin-version.nix {};
|
||||
tests.nsd = callTest tests/nsd.nix {};
|
||||
tests.openssh = callTest tests/openssh.nix {};
|
||||
tests.panamax = hydraJob (import tests/panamax.nix { system = "x86_64-linux"; });
|
||||
|
57
nixos/tests/nixos-pin-version.nix
Normal file
57
nixos/tests/nixos-pin-version.nix
Normal file
@ -0,0 +1,57 @@
|
||||
{ system ? builtins.currentSystem }:
|
||||
|
||||
with import ../lib/testing.nix { inherit system; };
|
||||
let
|
||||
in
|
||||
|
||||
pkgs.stdenv.mkDerivation rec {
|
||||
name = "nixos-pin-version";
|
||||
src = ../..;
|
||||
buildInputs = with pkgs; [ nix gnugrep ];
|
||||
|
||||
withoutPath = pkgs.writeText "configuration.nix" ''
|
||||
{
|
||||
nixos.extraModules = [ ({lib, ...}: { system.nixosRevision = lib.mkForce "ABCDEF"; }) ];
|
||||
}
|
||||
'';
|
||||
|
||||
withPath = pkgs.writeText "configuration.nix" ''
|
||||
{
|
||||
nixos.path = ${src}/nixos ;
|
||||
nixos.extraModules = [ ({lib, ...}: { system.nixosRevision = lib.mkForce "ABCDEF"; }) ];
|
||||
}
|
||||
'';
|
||||
|
||||
phases = "buildPhase";
|
||||
buildPhase = ''
|
||||
datadir="${pkgs.nix}/share"
|
||||
export TEST_ROOT=$(pwd)/test-tmp
|
||||
export NIX_STORE_DIR=$TEST_ROOT/store
|
||||
export NIX_LOCALSTATE_DIR=$TEST_ROOT/var
|
||||
export NIX_LOG_DIR=$TEST_ROOT/var/log/nix
|
||||
export NIX_STATE_DIR=$TEST_ROOT/var/nix
|
||||
export NIX_DB_DIR=$TEST_ROOT/db
|
||||
export NIX_CONF_DIR=$TEST_ROOT/etc
|
||||
export NIX_MANIFESTS_DIR=$TEST_ROOT/var/nix/manifests
|
||||
export NIX_BUILD_HOOK=
|
||||
export PAGER=cat
|
||||
cacheDir=$TEST_ROOT/binary-cache
|
||||
nix-store --init
|
||||
|
||||
export NIX_PATH="nixpkgs=$src:nixos=$src/nixos:nixos-config=${withoutPath}" ;
|
||||
if test $(nix-instantiate $src/nixos -A config.system.nixosRevision --eval-only) != '"ABCDEF"' ; then :;
|
||||
else
|
||||
echo "Unexpected re-entry without the nixos.path option defined.";
|
||||
exit 1;
|
||||
fi;
|
||||
|
||||
export NIX_PATH="nixpkgs=$src:nixos=$src/nixos:nixos-config=${withPath}" ;
|
||||
if test $(nix-instantiate $src/nixos -A config.system.nixosRevision --eval-only) = '"ABCDEF"' ; then :;
|
||||
else
|
||||
echo "Expected a re-entry when the nixos.path option is defined.";
|
||||
exit 1;
|
||||
fi;
|
||||
|
||||
touch $out;
|
||||
'';
|
||||
}
|
Loading…
Reference in New Issue
Block a user