144 lines
4.7 KiB
Nix
144 lines
4.7 KiB
Nix
{
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clan-core,
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nixpkgs,
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lib,
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}:
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{
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directory, # The directory containing the machines subdirectory
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specialArgs ? { }, # Extra arguments to pass to nixosSystem i.e. useful to make self available
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machines ? { }, # allows to include machine-specific modules i.e. machines.${name} = { ... }
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clanName, # Needs to be (globally) unique, as this determines the folder name where the flake gets downloaded to.
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clanIcon ? null, # A path to an icon to be used for the clan, should be the same for all machines
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pkgsForSystem ? (_system: null), # A map from arch to pkgs, if specified this nixpkgs will be only imported once for each system.
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# This improves performance, but all nipxkgs.* options will be ignored.
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}:
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let
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machinesDirs = lib.optionalAttrs (builtins.pathExists "${directory}/machines") (
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builtins.readDir (directory + /machines)
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);
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machineSettings =
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machineName:
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# CLAN_MACHINE_SETTINGS_FILE allows to override the settings file temporarily
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# This is useful for doing a dry-run before writing changes into the settings.json
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# Using CLAN_MACHINE_SETTINGS_FILE requires passing --impure to nix eval
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if builtins.getEnv "CLAN_MACHINE_SETTINGS_FILE" != "" then
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builtins.fromJSON (builtins.readFile (builtins.getEnv "CLAN_MACHINE_SETTINGS_FILE"))
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else
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lib.optionalAttrs (builtins.pathExists "${directory}/machines/${machineName}/settings.json") (
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builtins.fromJSON (builtins.readFile (directory + /machines/${machineName}/settings.json))
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);
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# Read additional imports specified via a config option in settings.json
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# This is not an infinite recursion, because the imports are discovered here
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# before calling evalModules.
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# It is still useful to have the imports as an option, as this allows for type
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# checking and easy integration with the config frontend(s)
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machineImports =
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machineSettings: map (module: clan-core.clanModules.${module}) (machineSettings.clanImports or [ ]);
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# TODO: remove default system once we have a hardware-config mechanism
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nixosConfiguration =
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{
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system ? "x86_64-linux",
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name,
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pkgs ? null,
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extraConfig ? { },
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}:
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nixpkgs.lib.nixosSystem {
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modules =
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let
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settings = machineSettings name;
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in
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(machineImports settings)
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++ [
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settings
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clan-core.nixosModules.clanCore
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extraConfig
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(machines.${name} or { })
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(
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{
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networking.hostName = lib.mkDefault name;
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clanCore.clanName = clanName;
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clanCore.clanIcon = clanIcon;
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clanCore.clanDir = directory;
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clanCore.machineName = name;
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nixpkgs.hostPlatform = lib.mkDefault system;
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# speeds up nix commands by using the nixpkgs from the host system (especially useful in VMs)
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nix.registry.nixpkgs.to = {
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type = "path";
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path = lib.mkDefault nixpkgs;
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};
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}
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// lib.optionalAttrs (pkgs != null) { nixpkgs.pkgs = lib.mkForce pkgs; }
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)
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];
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specialArgs = {
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inherit clan-core;
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} // specialArgs;
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};
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allMachines = machinesDirs // machines;
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supportedSystems = [
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"x86_64-linux"
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"aarch64-linux"
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"riscv64-linux"
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"x86_64-darwin"
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"aarch64-darwin"
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];
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nixosConfigurations = lib.mapAttrs (name: _: nixosConfiguration { inherit name; }) allMachines;
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# This instantiates nixos for each system that we support:
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# configPerSystem = <system>.<machine>.nixosConfiguration
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# We need this to build nixos secret generators for each system
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configsPerSystem = builtins.listToAttrs (
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builtins.map (
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system:
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lib.nameValuePair system (
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lib.mapAttrs (
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name: _:
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nixosConfiguration {
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inherit name system;
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pkgs = pkgsForSystem system;
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}
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) allMachines
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)
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) supportedSystems
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);
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configsFuncPerSystem = builtins.listToAttrs (
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builtins.map (
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system:
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lib.nameValuePair system (
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lib.mapAttrs (
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name: _: args:
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nixosConfiguration (
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args
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// {
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inherit name system;
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pkgs = pkgsForSystem system;
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}
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)
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) allMachines
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)
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) supportedSystems
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);
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in
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{
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inherit nixosConfigurations;
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clanInternals = {
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machines = configsPerSystem;
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machinesFunc = configsFuncPerSystem;
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all-machines-json = lib.mapAttrs (
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system: configs:
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nixpkgs.legacyPackages.${system}.writers.writeJSON "machines.json" (
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lib.mapAttrs (_: m: m.config.system.clan.deployment.data) configs
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)
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) configsPerSystem;
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};
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}
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