mirror of
https://github.com/LnL7/nix-darwin.git
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418 lines
15 KiB
Nix
418 lines
15 KiB
Nix
{ config, lib, pkgs, ... }:
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with lib;
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let
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cfg = config.nix;
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isNix20 = versionAtLeast (cfg.version or "<unknown>") "1.12pre";
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nixConf =
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let
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# If we're using sandbox for builds, then provide /bin/sh in
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# the sandbox as a bind-mount to bash. This means we also need to
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# include the entire closure of bash.
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sh = pkgs.stdenv.shell;
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binshDeps = pkgs.writeReferencesToFile sh;
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in
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pkgs.runCommandNoCC "nix.conf"
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{ preferLocalBuild = true; extraOptions = cfg.extraOptions; }
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''
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cat > $out <<END
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# WARNING: this file is generated from the nix.* options in
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# your NixOS configuration, typically
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# /etc/nixos/configuration.nix. Do not edit it!
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${optionalString config.services.nix-daemon.enable ''
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build-users-group = nixbld
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''}
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${if isNix20 then "max-jobs" else "build-max-jobs"} = ${toString (cfg.maxJobs)}
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${if isNix20 then "cores" else "build-cores"} = ${toString (cfg.buildCores)}
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${if isNix20 then "sandbox" else "build-use-sandbox"} = ${if (builtins.isBool cfg.useSandbox) then boolToString cfg.useSandbox else cfg.useSandbox}
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${optionalString (cfg.sandboxPaths != []) ''
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${if isNix20 then "extra-sandbox-paths" else "build-sandbox-paths"} = ${toString cfg.sandboxPaths}
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''}
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${if isNix20 then "substituters" else "binary-caches"} = ${toString cfg.binaryCaches}
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${if isNix20 then "trusted-substituters" else "trusted-binary-caches"} = ${toString cfg.trustedBinaryCaches}
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${if isNix20 then "trusted-public-keys" else "binary-cache-public-keys"} = ${toString cfg.binaryCachePublicKeys}
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${if isNix20 then ''
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require-sigs = ${if cfg.requireSignedBinaryCaches then "true" else "false"}
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'' else ''
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signed-binary-caches = ${if cfg.requireSignedBinaryCaches then "*" else ""}
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''}
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trusted-users = ${toString cfg.trustedUsers}
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allowed-users = ${toString cfg.allowedUsers}
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${optionalString (isNix20 && !cfg.distributedBuilds) ''
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builders =
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''}
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$extraOptions
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END
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'';
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in
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{
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options = {
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nix.package = mkOption {
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type = types.either types.package types.path;
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default = pkgs.nix;
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defaultText = "pkgs.nix";
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example = literalExample "pkgs.nixUnstable";
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description = ''
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This option specifies the package or profile that contains the version of Nix to use throughout the system.
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To keep the version of nix originally installed the default profile can be used.
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eg. /nix/var/nix/profiles/default
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'';
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};
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nix.version = mkOption {
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type = types.str;
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default = "<unknown>";
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example = "1.11.6";
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description = "The version of nix. Used to determine what settings to configure in nix.conf";
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};
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nix.useDaemon = mkOption {
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type = types.bool;
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default = false;
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description = "
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If set, Nix will use the daemon to perform operations.
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Use this instead of services.nix-daemon.enable if you don't wan't the
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daemon service to be managed for you.
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";
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};
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nix.maxJobs = mkOption {
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type = types.int;
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default = 1;
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example = 64;
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description = ''
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This option defines the maximum number of jobs that Nix will try
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to build in parallel. The default is 1. You should generally
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set it to the total number of logical cores in your system (e.g., 16
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for two CPUs with 4 cores each and hyper-threading).
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'';
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};
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nix.buildCores = mkOption {
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type = types.int;
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default = 1;
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example = 64;
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description = ''
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This option defines the maximum number of concurrent tasks during
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one build. It affects, e.g., -j option for make. The default is 1.
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The special value 0 means that the builder should use all
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available CPU cores in the system. Some builds may become
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non-deterministic with this option; use with care! Packages will
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only be affected if enableParallelBuilding is set for them.
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'';
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};
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nix.useSandbox = mkOption {
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type = types.either types.bool (types.enum ["relaxed"]);
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default = false;
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description = "
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If set, Nix will perform builds in a sandboxed environment that it
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will set up automatically for each build. This prevents
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impurities in builds by disallowing access to dependencies
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outside of the Nix store.
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";
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};
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nix.sandboxPaths = mkOption {
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type = types.listOf types.str;
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default = [];
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example = [ "/dev" "/proc" ];
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description =
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''
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Directories from the host filesystem to be included
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in the sandbox.
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'';
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};
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nix.extraOptions = mkOption {
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type = types.lines;
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default = "";
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example = ''
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gc-keep-outputs = true
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gc-keep-derivations = true
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'';
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description = "Additional text appended to <filename>nix.conf</filename>.";
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};
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nix.distributedBuilds = mkOption {
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type = types.bool;
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default = false;
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description = ''
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Whether to distribute builds to the machines listed in
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<option>nix.buildMachines</option>.
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NOTE: This requires services.nix-daemon.enable for a
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multi-user install.
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'';
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};
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nix.daemonNiceLevel = mkOption {
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type = types.int;
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default = 0;
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description = ''
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Nix daemon process priority. This priority propagates to build processes.
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0 is the default Unix process priority, 19 is the lowest.
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'';
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};
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nix.daemonIONice = mkOption {
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type = types.bool;
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default = false;
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description = ''
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Whether the Nix daemon process should considered to be low priority when
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doing file system I/O.
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'';
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};
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nix.buildMachines = mkOption {
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type = types.listOf types.attrs;
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default = [];
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example = [
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{ hostName = "voila.labs.cs.uu.nl";
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sshUser = "nix";
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sshKey = "/root/.ssh/id_buildfarm";
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system = "powerpc-darwin";
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maxJobs = 1;
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}
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{ hostName = "linux64.example.org";
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sshUser = "buildfarm";
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sshKey = "/root/.ssh/id_buildfarm";
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system = "x86_64-linux";
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maxJobs = 2;
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supportedFeatures = [ "kvm" ];
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mandatoryFeatures = [ "perf" ];
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}
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];
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description = ''
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This option lists the machines to be used if distributed
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builds are enabled (see
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<option>nix.distributedBuilds</option>). Nix will perform
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derivations on those machines via SSH by copying the inputs
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to the Nix store on the remote machine, starting the build,
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then copying the output back to the local Nix store. Each
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element of the list should be an attribute set containing
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the machine's host name (<varname>hostname</varname>), the
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user name to be used for the SSH connection
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(<varname>sshUser</varname>), the Nix system type
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(<varname>system</varname>, e.g.,
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<literal>"i686-linux"</literal>), the maximum number of
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jobs to be run in parallel on that machine
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(<varname>maxJobs</varname>), the path to the SSH private
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key to be used to connect (<varname>sshKey</varname>), a
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list of supported features of the machine
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(<varname>supportedFeatures</varname>) and a list of
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mandatory features of the machine
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(<varname>mandatoryFeatures</varname>). The SSH private key
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should not have a passphrase, and the corresponding public
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key should be added to
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<filename>~<replaceable>sshUser</replaceable>/authorized_keys</filename>
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on the remote machine.
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'';
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};
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# Environment variables for running Nix.
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nix.envVars = mkOption {
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type = types.attrs;
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internal = true;
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default = {};
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description = "Environment variables used by Nix.";
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};
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nix.readOnlyStore = mkOption {
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type = types.bool;
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default = true;
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description = ''
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If set, NixOS will enforce the immutability of the Nix store
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by making <filename>/nix/store</filename> a read-only bind
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mount. Nix will automatically make the store writable when
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needed.
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'';
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};
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nix.binaryCaches = mkOption {
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type = types.listOf types.str;
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example = [ https://cache.example.org/ ];
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description = ''
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List of binary cache URLs used to obtain pre-built binaries
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of Nix packages.
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'';
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};
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nix.trustedBinaryCaches = mkOption {
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type = types.listOf types.str;
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default = [ ];
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example = [ https://hydra.example.org/ ];
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description = ''
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List of binary cache URLs that non-root users can use (in
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addition to those specified using
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<option>nix.binaryCaches</option>) by passing
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<literal>--option binary-caches</literal> to Nix commands.
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'';
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};
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nix.requireSignedBinaryCaches = mkOption {
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type = types.bool;
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default = true;
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description = ''
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If enabled (the default), Nix will only download binaries from binary caches if
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they are cryptographically signed with any of the keys listed in
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<option>nix.binaryCachePublicKeys</option>. If disabled, signatures are neither
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required nor checked, so it's strongly recommended that you use only
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trustworthy caches and https to prevent man-in-the-middle attacks.
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'';
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};
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nix.binaryCachePublicKeys = mkOption {
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type = types.listOf types.str;
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example = [ "hydra.nixos.org-1:CNHJZBh9K4tP3EKF6FkkgeVYsS3ohTl+oS0Qa8bezVs=" ];
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description = ''
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List of public keys used to sign binary caches. If
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<option>nix.requireSignedBinaryCaches</option> is enabled,
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then Nix will use a binary from a binary cache if and only
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if it is signed by <emphasis>any</emphasis> of the keys
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listed here. By default, only the key for
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<uri>cache.nixos.org</uri> is included.
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'';
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};
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nix.trustedUsers = mkOption {
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type = types.listOf types.str;
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default = [ "root" ];
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example = [ "root" "alice" "@wheel" ];
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description = ''
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A list of names of users that have additional rights when
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connecting to the Nix daemon, such as the ability to specify
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additional binary caches, or to import unsigned NARs. You
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can also specify groups by prefixing them with
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<literal>@</literal>; for instance,
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<literal>@wheel</literal> means all users in the wheel
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group.
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'';
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};
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nix.allowedUsers = mkOption {
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type = types.listOf types.str;
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default = [ "*" ];
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example = [ "@wheel" "@builders" "alice" "bob" ];
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description = ''
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A list of names of users (separated by whitespace) that are
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allowed to connect to the Nix daemon. As with
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<option>nix.trustedUsers</option>, you can specify groups by
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prefixing them with <literal>@</literal>. Also, you can
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allow all users by specifying <literal>*</literal>. The
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default is <literal>*</literal>. Note that trusted users are
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always allowed to connect.
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'';
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};
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nix.nixPath = mkOption {
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type = types.listOf types.str;
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default =
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[ # Include default path <darwin-config>.
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"darwin-config=${config.environment.darwinConfig}"
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"/nix/var/nix/profiles/per-user/root/channels"
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"$HOME/.nix-defexpr/channels"
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];
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description = ''
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The default Nix expression search path, used by the Nix
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evaluator to look up paths enclosed in angle brackets
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(e.g. <literal><nixpkgs></literal>).
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'';
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};
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};
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config = {
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warnings = [
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(mkIf (!config.services.activate-system.enable && cfg.distributedBuilds) "services.activate-system is not enabled, a reboot could cause distributed builds to stop working.")
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(mkIf (!cfg.distributedBuilds && cfg.buildMachines != []) "nix.distributedBuilds is not enabled, build machines won't be configured.")
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];
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nix.binaryCaches = mkAfter [ https://cache.nixos.org/ ];
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nix.binaryCachePublicKeys = mkAfter [ "cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ16ZPMQFGspcDShjY=" ];
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nix.nixPath = mkIf (config.system.stateVersion < 2) (mkDefault
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[ "darwin=$HOME/.nix-defexpr/darwin"
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"darwin-config=$HOME/.nixpkgs/darwin-configuration.nix"
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"/nix/var/nix/profiles/per-user/root/channels"
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]);
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nix.package = mkIf (config.system.stateVersion < 3)
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(mkDefault "/nix/var/nix/profiles/default");
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nix.version = mkIf (isDerivation cfg.package) cfg.package.version or "<unknown>";
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environment.systemPackages = mkIf (isDerivation cfg.package)
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[ cfg.package ];
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environment.etc."nix/nix.conf".source = nixConf;
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# List of machines for distributed Nix builds in the format
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# expected by build-remote.
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environment.etc."nix/machines" =
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{ enable = cfg.buildMachines != [];
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text =
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concatMapStrings (machine:
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"${if machine ? sshUser then "${machine.sshUser}@" else ""}${machine.hostName} "
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+ machine.system or (concatStringsSep "," machine.systems)
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+ " ${machine.sshKey or "-"} ${toString machine.maxJobs or 1} "
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+ toString (machine.speedFactor or 1)
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+ " "
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+ concatStringsSep "," (machine.mandatoryFeatures or [] ++ machine.supportedFeatures or [])
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+ " "
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+ concatStringsSep "," machine.mandatoryFeatures or []
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+ "\n"
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) cfg.buildMachines;
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};
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nix.envVars =
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optionalAttrs (!isNix20) {
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NIX_CONF_DIR = "/etc/nix";
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# Enable the copy-from-other-stores substituter, which allows
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# builds to be sped up by copying build results from remote
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# Nix stores. To do this, mount the remote file system on a
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# subdirectory of /run/nix/remote-stores.
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NIX_OTHER_STORES = "/run/nix/remote-stores/*/nix";
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}
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// optionalAttrs cfg.distributedBuilds {
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NIX_CURRENT_LOAD = "/run/nix/current-load";
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}
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// optionalAttrs (cfg.distributedBuilds && !isNix20) {
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NIX_BUILD_HOOK = "${cfg.package}/libexec/nix/build-remote.pl";
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NIX_REMOTE_SYSTEMS = "/etc/nix/machines";
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};
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environment.extraInit = optionalString (!isNix20) ''
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# Set up secure multi-user builds: non-root users build through the
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# Nix daemon.
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if [ ! -w /nix/var/nix/db ]; then
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export NIX_REMOTE=daemon
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fi
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'';
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# Set up the environment variables for running Nix.
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environment.variables = cfg.envVars //
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{ NIX_PATH = concatStringsSep ":" cfg.nixPath;
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};
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system.activationScripts.nix.text = mkIf cfg.distributedBuilds ''
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if [ ! -d ${cfg.envVars.NIX_CURRENT_LOAD} ]; then
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mkdir -p ${cfg.envVars.NIX_CURRENT_LOAD}
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fi
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'';
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system.activationScripts.nix-daemon.text = mkIf cfg.useDaemon ''
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if ! diff /etc/nix/nix.conf /run/current-system/etc/nix/nix.conf &> /dev/null; then
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echo >&2 "reloading nix-daemon..."
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pkill -HUP nix-daemon
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fi
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'';
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};
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}
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