You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
826 lines
32 KiB
826 lines
32 KiB
{ config, lib, pkgs, ... }:
|
|
|
|
with lib;
|
|
|
|
let
|
|
|
|
cfg = config.nix;
|
|
|
|
nixPackage = cfg.package.out;
|
|
|
|
isNixAtLeast = versionAtLeast (getVersion nixPackage);
|
|
|
|
makeNixBuildUser = nr: {
|
|
name = "nixbld${toString nr}";
|
|
value = {
|
|
description = "Nix build user ${toString nr}";
|
|
|
|
/*
|
|
For consistency with the setgid(2), setuid(2), and setgroups(2)
|
|
calls in `libstore/build.cc', don't add any supplementary group
|
|
here except "nixbld".
|
|
*/
|
|
uid = builtins.add config.ids.uids.nixbld nr;
|
|
isSystemUser = true;
|
|
group = "nixbld";
|
|
extraGroups = [ "nixbld" ];
|
|
};
|
|
};
|
|
|
|
nixbldUsers = listToAttrs (map makeNixBuildUser (range 1 cfg.nrBuildUsers));
|
|
|
|
nixConf =
|
|
assert isNixAtLeast "2.2";
|
|
let
|
|
|
|
mkValueString = v:
|
|
if v == null then ""
|
|
else if isInt v then toString v
|
|
else if isBool v then boolToString v
|
|
else if isFloat v then floatToString v
|
|
else if isList v then toString v
|
|
else if isDerivation v then toString v
|
|
else if builtins.isPath v then toString v
|
|
else if isString v then v
|
|
else if isCoercibleToString v then toString v
|
|
else abort "The nix conf value: ${toPretty {} v} can not be encoded";
|
|
|
|
mkKeyValue = k: v: "${escape [ "=" ] k} = ${mkValueString v}";
|
|
|
|
mkKeyValuePairs = attrs: concatStringsSep "\n" (mapAttrsToList mkKeyValue attrs);
|
|
|
|
in
|
|
pkgs.writeTextFile {
|
|
name = "nix.conf";
|
|
text = ''
|
|
# WARNING: this file is generated from the nix.* options in
|
|
# your NixOS configuration, typically
|
|
# /etc/nixos/configuration.nix. Do not edit it!
|
|
${mkKeyValuePairs cfg.settings}
|
|
${cfg.extraOptions}
|
|
'';
|
|
checkPhase =
|
|
if pkgs.stdenv.hostPlatform != pkgs.stdenv.buildPlatform then ''
|
|
echo "Ignoring validation for cross-compilation"
|
|
''
|
|
else ''
|
|
echo "Validating generated nix.conf"
|
|
ln -s $out ./nix.conf
|
|
set -e
|
|
set +o pipefail
|
|
NIX_CONF_DIR=$PWD \
|
|
${cfg.package}/bin/nix show-config ${optionalString (isNixAtLeast "2.3pre") "--no-net"} \
|
|
${optionalString (isNixAtLeast "2.4pre") "--option experimental-features nix-command"} \
|
|
|& sed -e 's/^warning:/error:/' \
|
|
| (! grep '${if cfg.checkConfig then "^error:" else "^error: unknown setting"}')
|
|
set -o pipefail
|
|
'';
|
|
};
|
|
|
|
legacyConfMappings = {
|
|
useSandbox = "sandbox";
|
|
buildCores = "cores";
|
|
maxJobs = "max-jobs";
|
|
sandboxPaths = "extra-sandbox-paths";
|
|
binaryCaches = "substituters";
|
|
trustedBinaryCaches = "trusted-substituters";
|
|
binaryCachePublicKeys = "trusted-public-keys";
|
|
autoOptimiseStore = "auto-optimise-store";
|
|
requireSignedBinaryCaches = "require-sigs";
|
|
trustedUsers = "trusted-users";
|
|
allowedUsers = "allowed-users";
|
|
systemFeatures = "system-features";
|
|
};
|
|
|
|
semanticConfType = with types;
|
|
let
|
|
confAtom = nullOr
|
|
(oneOf [
|
|
bool
|
|
int
|
|
float
|
|
str
|
|
path
|
|
package
|
|
]) // {
|
|
description = "Nix config atom (null, bool, int, float, str, path or package)";
|
|
};
|
|
in
|
|
attrsOf (either confAtom (listOf confAtom));
|
|
|
|
in
|
|
|
|
{
|
|
imports = [
|
|
(mkRenamedOptionModuleWith { sinceRelease = 2003; from = [ "nix" "useChroot" ]; to = [ "nix" "useSandbox" ]; })
|
|
(mkRenamedOptionModuleWith { sinceRelease = 2003; from = [ "nix" "chrootDirs" ]; to = [ "nix" "sandboxPaths" ]; })
|
|
(mkRenamedOptionModuleWith { sinceRelease = 2205; from = [ "nix" "daemonIONiceLevel" ]; to = [ "nix" "daemonIOSchedPriority" ]; })
|
|
(mkRemovedOptionModule [ "nix" "daemonNiceLevel" ] "Consider nix.daemonCPUSchedPolicy instead.")
|
|
] ++ mapAttrsToList (oldConf: newConf: mkRenamedOptionModuleWith { sinceRelease = 2205; from = [ "nix" oldConf ]; to = [ "nix" "settings" newConf ]; }) legacyConfMappings;
|
|
|
|
###### interface
|
|
|
|
options = {
|
|
|
|
nix = {
|
|
|
|
enable = mkOption {
|
|
type = types.bool;
|
|
default = true;
|
|
description = ''
|
|
Whether to enable Nix.
|
|
Disabling Nix makes the system hard to modify and the Nix programs and configuration will not be made available by NixOS itself.
|
|
'';
|
|
};
|
|
|
|
package = mkOption {
|
|
type = types.package;
|
|
default = pkgs.nix;
|
|
defaultText = literalExpression "pkgs.nix";
|
|
description = ''
|
|
This option specifies the Nix package instance to use throughout the system.
|
|
'';
|
|
};
|
|
|
|
distributedBuilds = mkOption {
|
|
type = types.bool;
|
|
default = false;
|
|
description = ''
|
|
Whether to distribute builds to the machines listed in
|
|
<option>nix.buildMachines</option>.
|
|
'';
|
|
};
|
|
|
|
daemonCPUSchedPolicy = mkOption {
|
|
type = types.enum [ "other" "batch" "idle" ];
|
|
default = "other";
|
|
example = "batch";
|
|
description = ''
|
|
Nix daemon process CPU scheduling policy. This policy propagates to
|
|
build processes. <literal>other</literal> is the default scheduling
|
|
policy for regular tasks. The <literal>batch</literal> policy is
|
|
similar to <literal>other</literal>, but optimised for
|
|
non-interactive tasks. <literal>idle</literal> is for extremely
|
|
low-priority tasks that should only be run when no other task
|
|
requires CPU time.
|
|
|
|
Please note that while using the <literal>idle</literal> policy may
|
|
greatly improve responsiveness of a system performing expensive
|
|
builds, it may also slow down and potentially starve crucial
|
|
configuration updates during load.
|
|
|
|
<literal>idle</literal> may therefore be a sensible policy for
|
|
systems that experience only intermittent phases of high CPU load,
|
|
such as desktop or portable computers used interactively. Other
|
|
systems should use the <literal>other</literal> or
|
|
<literal>batch</literal> policy instead.
|
|
|
|
For more fine-grained resource control, please refer to
|
|
<citerefentry><refentrytitle>systemd.resource-control
|
|
</refentrytitle><manvolnum>5</manvolnum></citerefentry> and adjust
|
|
<option>systemd.services.nix-daemon</option> directly.
|
|
'';
|
|
};
|
|
|
|
daemonIOSchedClass = mkOption {
|
|
type = types.enum [ "best-effort" "idle" ];
|
|
default = "best-effort";
|
|
example = "idle";
|
|
description = ''
|
|
Nix daemon process I/O scheduling class. This class propagates to
|
|
build processes. <literal>best-effort</literal> is the default
|
|
class for regular tasks. The <literal>idle</literal> class is for
|
|
extremely low-priority tasks that should only perform I/O when no
|
|
other task does.
|
|
|
|
Please note that while using the <literal>idle</literal> scheduling
|
|
class can improve responsiveness of a system performing expensive
|
|
builds, it might also slow down or starve crucial configuration
|
|
updates during load.
|
|
|
|
<literal>idle</literal> may therefore be a sensible class for
|
|
systems that experience only intermittent phases of high I/O load,
|
|
such as desktop or portable computers used interactively. Other
|
|
systems should use the <literal>best-effort</literal> class.
|
|
'';
|
|
};
|
|
|
|
daemonIOSchedPriority = mkOption {
|
|
type = types.int;
|
|
default = 0;
|
|
example = 1;
|
|
description = ''
|
|
Nix daemon process I/O scheduling priority. This priority propagates
|
|
to build processes. The supported priorities depend on the
|
|
scheduling policy: With idle, priorities are not used in scheduling
|
|
decisions. best-effort supports values in the range 0 (high) to 7
|
|
(low).
|
|
'';
|
|
};
|
|
|
|
buildMachines = mkOption {
|
|
type = types.listOf (types.submodule {
|
|
options = {
|
|
hostName = mkOption {
|
|
type = types.str;
|
|
example = "nixbuilder.example.org";
|
|
description = ''
|
|
The hostname of the build machine.
|
|
'';
|
|
};
|
|
system = mkOption {
|
|
type = types.nullOr types.str;
|
|
default = null;
|
|
example = "x86_64-linux";
|
|
description = ''
|
|
The system type the build machine can execute derivations on.
|
|
Either this attribute or <varname>systems</varname> must be
|
|
present, where <varname>system</varname> takes precedence if
|
|
both are set.
|
|
'';
|
|
};
|
|
systems = mkOption {
|
|
type = types.listOf types.str;
|
|
default = [ ];
|
|
example = [ "x86_64-linux" "aarch64-linux" ];
|
|
description = ''
|
|
The system types the build machine can execute derivations on.
|
|
Either this attribute or <varname>system</varname> must be
|
|
present, where <varname>system</varname> takes precedence if
|
|
both are set.
|
|
'';
|
|
};
|
|
sshUser = mkOption {
|
|
type = types.nullOr types.str;
|
|
default = null;
|
|
example = "builder";
|
|
description = ''
|
|
The username to log in as on the remote host. This user must be
|
|
able to log in and run nix commands non-interactively. It must
|
|
also be privileged to build derivations, so must be included in
|
|
<option>nix.settings.trusted-users</option>.
|
|
'';
|
|
};
|
|
sshKey = mkOption {
|
|
type = types.nullOr types.str;
|
|
default = null;
|
|
example = "/root/.ssh/id_buildhost_builduser";
|
|
description = ''
|
|
The path to the SSH private key with which to authenticate on
|
|
the build machine. The private key must not have a passphrase.
|
|
If null, the building user (root on NixOS machines) must have an
|
|
appropriate ssh configuration to log in non-interactively.
|
|
|
|
Note that for security reasons, this path must point to a file
|
|
in the local filesystem, *not* to the nix store.
|
|
'';
|
|
};
|
|
maxJobs = mkOption {
|
|
type = types.int;
|
|
default = 1;
|
|
description = ''
|
|
The number of concurrent jobs the build machine supports. The
|
|
build machine will enforce its own limits, but this allows hydra
|
|
to schedule better since there is no work-stealing between build
|
|
machines.
|
|
'';
|
|
};
|
|
speedFactor = mkOption {
|
|
type = types.int;
|
|
default = 1;
|
|
description = ''
|
|
The relative speed of this builder. This is an arbitrary integer
|
|
that indicates the speed of this builder, relative to other
|
|
builders. Higher is faster.
|
|
'';
|
|
};
|
|
mandatoryFeatures = mkOption {
|
|
type = types.listOf types.str;
|
|
default = [ ];
|
|
example = [ "big-parallel" ];
|
|
description = ''
|
|
A list of features mandatory for this builder. The builder will
|
|
be ignored for derivations that don't require all features in
|
|
this list. All mandatory features are automatically included in
|
|
<varname>supportedFeatures</varname>.
|
|
'';
|
|
};
|
|
supportedFeatures = mkOption {
|
|
type = types.listOf types.str;
|
|
default = [ ];
|
|
example = [ "kvm" "big-parallel" ];
|
|
description = ''
|
|
A list of features supported by this builder. The builder will
|
|
be ignored for derivations that require features not in this
|
|
list.
|
|
'';
|
|
};
|
|
publicHostKey = mkOption {
|
|
type = types.nullOr types.str;
|
|
default = null;
|
|
description = ''
|
|
The (base64-encoded) public host key of this builder. The field
|
|
is calculated via <command>base64 -w0 /etc/ssh/ssh_host_type_key.pub</command>.
|
|
If null, SSH will use its regular known-hosts file when connecting.
|
|
'';
|
|
};
|
|
};
|
|
});
|
|
default = [ ];
|
|
description = ''
|
|
This option lists the machines to be used if distributed builds are
|
|
enabled (see <option>nix.distributedBuilds</option>).
|
|
Nix will perform derivations on those machines via SSH by copying the
|
|
inputs to the Nix store on the remote machine, starting the build,
|
|
then copying the output back to the local Nix store.
|
|
'';
|
|
};
|
|
|
|
# Environment variables for running Nix.
|
|
envVars = mkOption {
|
|
type = types.attrs;
|
|
internal = true;
|
|
default = { };
|
|
description = "Environment variables used by Nix.";
|
|
};
|
|
|
|
nrBuildUsers = mkOption {
|
|
type = types.int;
|
|
description = ''
|
|
Number of <literal>nixbld</literal> user accounts created to
|
|
perform secure concurrent builds. If you receive an error
|
|
message saying that “all build users are currently in use”,
|
|
you should increase this value.
|
|
'';
|
|
};
|
|
|
|
readOnlyStore = mkOption {
|
|
type = types.bool;
|
|
default = true;
|
|
description = ''
|
|
If set, NixOS will enforce the immutability of the Nix store
|
|
by making <filename>/nix/store</filename> a read-only bind
|
|
mount. Nix will automatically make the store writable when
|
|
needed.
|
|
'';
|
|
};
|
|
|
|
nixPath = mkOption {
|
|
type = types.listOf types.str;
|
|
default = [
|
|
"nixpkgs=/nix/var/nix/profiles/per-user/root/channels/nixos"
|
|
"nixos-config=/etc/nixos/configuration.nix"
|
|
"/nix/var/nix/profiles/per-user/root/channels"
|
|
];
|
|
description = ''
|
|
The default Nix expression search path, used by the Nix
|
|
evaluator to look up paths enclosed in angle brackets
|
|
(e.g. <literal><nixpkgs></literal>).
|
|
'';
|
|
};
|
|
|
|
checkConfig = mkOption {
|
|
type = types.bool;
|
|
default = true;
|
|
description = ''
|
|
If enabled (the default), checks for data type mismatches and that Nix
|
|
can parse the generated nix.conf.
|
|
'';
|
|
};
|
|
|
|
registry = mkOption {
|
|
type = types.attrsOf (types.submodule (
|
|
let
|
|
referenceAttrs = with types; attrsOf (oneOf [
|
|
str
|
|
int
|
|
bool
|
|
package
|
|
]);
|
|
in
|
|
{ config, name, ... }:
|
|
{
|
|
options = {
|
|
from = mkOption {
|
|
type = referenceAttrs;
|
|
example = { type = "indirect"; id = "nixpkgs"; };
|
|
description = "The flake reference to be rewritten.";
|
|
};
|
|
to = mkOption {
|
|
type = referenceAttrs;
|
|
example = { type = "github"; owner = "my-org"; repo = "my-nixpkgs"; };
|
|
description = "The flake reference <option>from</option> is rewritten to.";
|
|
};
|
|
flake = mkOption {
|
|
type = types.nullOr types.attrs;
|
|
default = null;
|
|
example = literalExpression "nixpkgs";
|
|
description = ''
|
|
The flake input <option>from</option> is rewritten to.
|
|
'';
|
|
};
|
|
exact = mkOption {
|
|
type = types.bool;
|
|
default = true;
|
|
description = ''
|
|
Whether the <option>from</option> reference needs to match exactly. If set,
|
|
a <option>from</option> reference like <literal>nixpkgs</literal> does not
|
|
match with a reference like <literal>nixpkgs/nixos-20.03</literal>.
|
|
'';
|
|
};
|
|
};
|
|
config = {
|
|
from = mkDefault { type = "indirect"; id = name; };
|
|
to = mkIf (config.flake != null) (mkDefault
|
|
{
|
|
type = "path";
|
|
path = config.flake.outPath;
|
|
} // filterAttrs
|
|
(n: _: n == "lastModified" || n == "rev" || n == "revCount" || n == "narHash")
|
|
config.flake);
|
|
};
|
|
}
|
|
));
|
|
default = { };
|
|
description = ''
|
|
A system-wide flake registry.
|
|
'';
|
|
};
|
|
|
|
extraOptions = mkOption {
|
|
type = types.lines;
|
|
default = "";
|
|
example = ''
|
|
keep-outputs = true
|
|
keep-derivations = true
|
|
'';
|
|
description = "Additional text appended to <filename>nix.conf</filename>.";
|
|
};
|
|
|
|
settings = mkOption {
|
|
type = types.submodule {
|
|
freeformType = semanticConfType;
|
|
|
|
options = {
|
|
max-jobs = mkOption {
|
|
type = types.either types.int (types.enum [ "auto" ]);
|
|
default = "auto";
|
|
example = 64;
|
|
description = ''
|
|
This option defines the maximum number of jobs that Nix will try to
|
|
build in parallel. The default is auto, which means it will use all
|
|
available logical cores. It is recommend to set it to the total
|
|
number of logical cores in your system (e.g., 16 for two CPUs with 4
|
|
cores each and hyper-threading).
|
|
'';
|
|
};
|
|
|
|
auto-optimise-store = mkOption {
|
|
type = types.bool;
|
|
default = false;
|
|
example = true;
|
|
description = ''
|
|
If set to true, Nix automatically detects files in the store that have
|
|
identical contents, and replaces them with hard links to a single copy.
|
|
This saves disk space. If set to false (the default), you can still run
|
|
nix-store --optimise to get rid of duplicate files.
|
|
'';
|
|
};
|
|
|
|
cores = mkOption {
|
|
type = types.int;
|
|
default = 0;
|
|
example = 64;
|
|
description = ''
|
|
This option defines the maximum number of concurrent tasks during
|
|
one build. It affects, e.g., -j option for make.
|
|
The special value 0 means that the builder should use all
|
|
available CPU cores in the system. Some builds may become
|
|
non-deterministic with this option; use with care! Packages will
|
|
only be affected if enableParallelBuilding is set for them.
|
|
'';
|
|
};
|
|
|
|
sandbox = mkOption {
|
|
type = types.either types.bool (types.enum [ "relaxed" ]);
|
|
default = true;
|
|
description = ''
|
|
If set, Nix will perform builds in a sandboxed environment that it
|
|
will set up automatically for each build. This prevents impurities
|
|
in builds by disallowing access to dependencies outside of the Nix
|
|
store by using network and mount namespaces in a chroot environment.
|
|
This is enabled by default even though it has a possible performance
|
|
impact due to the initial setup time of a sandbox for each build. It
|
|
doesn't affect derivation hashes, so changing this option will not
|
|
trigger a rebuild of packages.
|
|
'';
|
|
};
|
|
|
|
extra-sandbox-paths = mkOption {
|
|
type = types.listOf types.str;
|
|
default = [ ];
|
|
example = [ "/dev" "/proc" ];
|
|
description = ''
|
|
Directories from the host filesystem to be included
|
|
in the sandbox.
|
|
'';
|
|
};
|
|
|
|
substituters = mkOption {
|
|
type = types.listOf types.str;
|
|
description = ''
|
|
List of binary cache URLs used to obtain pre-built binaries
|
|
of Nix packages.
|
|
|
|
By default https://cache.nixos.org/ is added.
|
|
'';
|
|
};
|
|
|
|
trusted-substituters = mkOption {
|
|
type = types.listOf types.str;
|
|
default = [ ];
|
|
example = [ "https://hydra.nixos.org/" ];
|
|
description = ''
|
|
List of binary cache URLs that non-root users can use (in
|
|
addition to those specified using
|
|
<option>nix.settings.substituters</option>) by passing
|
|
<literal>--option binary-caches</literal> to Nix commands.
|
|
'';
|
|
};
|
|
|
|
require-sigs = mkOption {
|
|
type = types.bool;
|
|
default = true;
|
|
description = ''
|
|
If enabled (the default), Nix will only download binaries from binary caches if
|
|
they are cryptographically signed with any of the keys listed in
|
|
<option>nix.settings.trusted-public-keys</option>. If disabled, signatures are neither
|
|
required nor checked, so it's strongly recommended that you use only
|
|
trustworthy caches and https to prevent man-in-the-middle attacks.
|
|
'';
|
|
};
|
|
|
|
trusted-public-keys = mkOption {
|
|
type = types.listOf types.str;
|
|
example = [ "hydra.nixos.org-1:CNHJZBh9K4tP3EKF6FkkgeVYsS3ohTl+oS0Qa8bezVs=" ];
|
|
description = ''
|
|
List of public keys used to sign binary caches. If
|
|
<option>nix.settings.trusted-public-keys</option> is enabled,
|
|
then Nix will use a binary from a binary cache if and only
|
|
if it is signed by <emphasis>any</emphasis> of the keys
|
|
listed here. By default, only the key for
|
|
<uri>cache.nixos.org</uri> is included.
|
|
'';
|
|
};
|
|
|
|
trusted-users = mkOption {
|
|
type = types.listOf types.str;
|
|
default = [ "root" ];
|
|
example = [ "root" "alice" "@wheel" ];
|
|
description = ''
|
|
A list of names of users that have additional rights when
|
|
connecting to the Nix daemon, such as the ability to specify
|
|
additional binary caches, or to import unsigned NARs. You
|
|
can also specify groups by prefixing them with
|
|
<literal>@</literal>; for instance,
|
|
<literal>@wheel</literal> means all users in the wheel
|
|
group.
|
|
'';
|
|
};
|
|
|
|
system-features = mkOption {
|
|
type = types.listOf types.str;
|
|
example = [ "kvm" "big-parallel" "gccarch-skylake" ];
|
|
description = ''
|
|
The set of features supported by the machine. Derivations
|
|
can express dependencies on system features through the
|
|
<literal>requiredSystemFeatures</literal> attribute.
|
|
|
|
By default, pseudo-features <literal>nixos-test</literal>, <literal>benchmark</literal>,
|
|
and <literal>big-parallel</literal> used in Nixpkgs are set, <literal>kvm</literal>
|
|
is also included in it is avaliable.
|
|
'';
|
|
};
|
|
|
|
allowed-users = mkOption {
|
|
type = types.listOf types.str;
|
|
default = [ "*" ];
|
|
example = [ "@wheel" "@builders" "alice" "bob" ];
|
|
description = ''
|
|
A list of names of users (separated by whitespace) that are
|
|
allowed to connect to the Nix daemon. As with
|
|
<option>nix.settings.trusted-users</option>, you can specify groups by
|
|
prefixing them with <literal>@</literal>. Also, you can
|
|
allow all users by specifying <literal>*</literal>. The
|
|
default is <literal>*</literal>. Note that trusted users are
|
|
always allowed to connect.
|
|
'';
|
|
};
|
|
};
|
|
};
|
|
default = { };
|
|
example = literalExpression ''
|
|
{
|
|
use-sandbox = true;
|
|
show-trace = true;
|
|
|
|
system-features = [ "big-parallel" "kvm" "recursive-nix" ];
|
|
sandbox-paths = { "/bin/sh" = "''${pkgs.busybox-sandbox-shell.out}/bin/busybox"; };
|
|
}
|
|
'';
|
|
description = ''
|
|
Configuration for Nix, see
|
|
<link xlink:href="https://nixos.org/manual/nix/stable/#sec-conf-file"/> or
|
|
<citerefentry>
|
|
<refentrytitle>nix.conf</refentrytitle>
|
|
<manvolnum>5</manvolnum>
|
|
</citerefentry> for avalaible options.
|
|
The value declared here will be translated directly to the key-value pairs Nix expects.
|
|
</para>
|
|
<para>
|
|
You can use <command>nix-instantiate --eval --strict '<nixpkgs/nixos>' -A config.nix.settings</command>
|
|
to view the current value. By default it is empty.
|
|
</para>
|
|
<para>
|
|
Nix configurations defined under <option>nix.*</option> will be translated and applied to this
|
|
option. In addition, configuration specified in <option>nix.extraOptions</option> which will be appended
|
|
verbatim to the resulting config file.
|
|
'';
|
|
};
|
|
};
|
|
};
|
|
|
|
|
|
###### implementation
|
|
|
|
config = mkIf cfg.enable {
|
|
environment.systemPackages =
|
|
[
|
|
nixPackage
|
|
pkgs.nix-info
|
|
]
|
|
++ optional (config.programs.bash.enableCompletion) pkgs.nix-bash-completions;
|
|
|
|
environment.etc."nix/nix.conf".source = nixConf;
|
|
|
|
environment.etc."nix/registry.json".text = builtins.toJSON {
|
|
version = 2;
|
|
flakes = mapAttrsToList (n: v: { inherit (v) from to exact; }) cfg.registry;
|
|
};
|
|
|
|
# List of machines for distributed Nix builds in the format
|
|
# expected by build-remote.pl.
|
|
environment.etc."nix/machines" = mkIf (cfg.buildMachines != [ ]) {
|
|
text =
|
|
concatMapStrings
|
|
(machine:
|
|
(concatStringsSep " " ([
|
|
"${optionalString (machine.sshUser != null) "${machine.sshUser}@"}${machine.hostName}"
|
|
(if machine.system != null then machine.system else if machine.systems != [ ] then concatStringsSep "," machine.systems else "-")
|
|
(if machine.sshKey != null then machine.sshKey else "-")
|
|
(toString machine.maxJobs)
|
|
(toString machine.speedFactor)
|
|
(concatStringsSep "," (machine.supportedFeatures ++ machine.mandatoryFeatures))
|
|
(concatStringsSep "," machine.mandatoryFeatures)
|
|
]
|
|
++ optional (isNixAtLeast "2.4pre") (if machine.publicHostKey != null then machine.publicHostKey else "-")))
|
|
+ "\n"
|
|
)
|
|
cfg.buildMachines;
|
|
};
|
|
|
|
assertions =
|
|
let badMachine = m: m.system == null && m.systems == [ ];
|
|
in
|
|
[
|
|
{
|
|
assertion = !(any badMachine cfg.buildMachines);
|
|
message = ''
|
|
At least one system type (via <varname>system</varname> or
|
|
<varname>systems</varname>) must be set for every build machine.
|
|
Invalid machine specifications:
|
|
'' + " " +
|
|
(concatStringsSep "\n "
|
|
(map (m: m.hostName)
|
|
(filter (badMachine) cfg.buildMachines)));
|
|
}
|
|
];
|
|
|
|
systemd.packages = [ nixPackage ];
|
|
|
|
# Will only work once https://github.com/NixOS/nix/pull/6285 is merged
|
|
# systemd.tmpfiles.packages = [ nixPackage ];
|
|
|
|
# Can be dropped for Nix > https://github.com/NixOS/nix/pull/6285
|
|
systemd.tmpfiles.rules = [
|
|
"d /nix/var/nix/daemon-socket 0755 root root - -"
|
|
];
|
|
|
|
systemd.sockets.nix-daemon.wantedBy = [ "sockets.target" ];
|
|
|
|
systemd.services.nix-daemon =
|
|
{
|
|
path = [ nixPackage pkgs.util-linux config.programs.ssh.package ]
|
|
++ optionals cfg.distributedBuilds [ pkgs.gzip ];
|
|
|
|
environment = cfg.envVars
|
|
// { CURL_CA_BUNDLE = "/etc/ssl/certs/ca-certificates.crt"; }
|
|
// config.networking.proxy.envVars;
|
|
|
|
unitConfig.RequiresMountsFor = "/nix/store";
|
|
|
|
serviceConfig =
|
|
{
|
|
CPUSchedulingPolicy = cfg.daemonCPUSchedPolicy;
|
|
IOSchedulingClass = cfg.daemonIOSchedClass;
|
|
IOSchedulingPriority = cfg.daemonIOSchedPriority;
|
|
LimitNOFILE = 4096;
|
|
};
|
|
|
|
restartTriggers = [ nixConf ];
|
|
|
|
# `stopIfChanged = false` changes to switch behavior
|
|
# from stop -> update units -> start
|
|
# to update units -> restart
|
|
#
|
|
# The `stopIfChanged` setting therefore controls a trade-off between a
|
|
# more predictable lifecycle, which runs the correct "version" of
|
|
# the `ExecStop` line, and on the other hand the availability of
|
|
# sockets during the switch, as the effectiveness of the stop operation
|
|
# depends on the socket being stopped as well.
|
|
#
|
|
# As `nix-daemon.service` does not make use of `ExecStop`, we prefer
|
|
# to keep the socket up and available. This is important for machines
|
|
# that run Nix-based services, such as automated build, test, and deploy
|
|
# services, that expect the daemon socket to be available at all times.
|
|
#
|
|
# Notably, the Nix client does not retry on failure to connect to the
|
|
# daemon socket, and the in-process RemoteStore instance will disable
|
|
# itself. This makes retries infeasible even for services that are
|
|
# aware of the issue. Failure to connect can affect not only new client
|
|
# processes, but also new RemoteStore instances in existing processes,
|
|
# as well as existing RemoteStore instances that have not saturated
|
|
# their connection pool.
|
|
#
|
|
# Also note that `stopIfChanged = true` does not kill existing
|
|
# connection handling daemons, as one might wish to happen before a
|
|
# breaking Nix upgrade (which is rare). The daemon forks that handle
|
|
# the individual connections split off into their own sessions, causing
|
|
# them not to be stopped by systemd.
|
|
# If a Nix upgrade does require all existing daemon processes to stop,
|
|
# nix-daemon must do so on its own accord, and only when the new version
|
|
# starts and detects that Nix's persistent state needs an upgrade.
|
|
stopIfChanged = false;
|
|
|
|
};
|
|
|
|
# Set up the environment variables for running Nix.
|
|
environment.sessionVariables = cfg.envVars // { NIX_PATH = cfg.nixPath; };
|
|
|
|
environment.extraInit =
|
|
''
|
|
if [ -e "$HOME/.nix-defexpr/channels" ]; then
|
|
export NIX_PATH="$HOME/.nix-defexpr/channels''${NIX_PATH:+:$NIX_PATH}"
|
|
fi
|
|
'';
|
|
|
|
nix.nrBuildUsers = mkDefault (max 32 (if cfg.settings.max-jobs == "auto" then 0 else cfg.settings.max-jobs));
|
|
|
|
users.users = nixbldUsers;
|
|
|
|
services.xserver.displayManager.hiddenUsers = attrNames nixbldUsers;
|
|
|
|
system.activationScripts.nix = stringAfter [ "etc" "users" ]
|
|
''
|
|
install -m 0755 -d /nix/var/nix/{gcroots,profiles}/per-user
|
|
|
|
# Subscribe the root user to the NixOS channel by default.
|
|
if [ ! -e "/root/.nix-channels" ]; then
|
|
echo "${config.system.defaultChannel} nixos" > "/root/.nix-channels"
|
|
fi
|
|
'';
|
|
|
|
# Legacy configuration conversion.
|
|
nix.settings = mkMerge [
|
|
{
|
|
trusted-public-keys = [ "cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ16ZPMQFGspcDShjY=" ];
|
|
substituters = mkAfter [ "https://cache.nixos.org/" ];
|
|
|
|
system-features = mkDefault (
|
|
[ "nixos-test" "benchmark" "big-parallel" "kvm" ] ++
|
|
optionals (pkgs.hostPlatform ? gcc.arch) (
|
|
# a builder can run code for `gcc.arch` and inferior architectures
|
|
[ "gccarch-${pkgs.hostPlatform.gcc.arch}" ] ++
|
|
map (x: "gccarch-${x}") systems.architectures.inferiors.${pkgs.hostPlatform.gcc.arch}
|
|
)
|
|
);
|
|
}
|
|
|
|
(mkIf (!cfg.distributedBuilds) { builders = null; })
|
|
|
|
(mkIf (isNixAtLeast "2.3pre") { sandbox-fallback = false; })
|
|
];
|
|
|
|
};
|
|
|
|
}
|
|
|