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89 lines
2.7 KiB
Nix
89 lines
2.7 KiB
Nix
{ config, pkgs, lib, ... }:
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let
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cfg = config.services.harmonia;
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format = pkgs.formats.toml { };
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in
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{
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options = {
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services.harmonia = {
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enable = lib.mkEnableOption (lib.mdDoc "Harmonia: Nix binary cache written in Rust");
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signKeyPath = lib.mkOption {
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type = lib.types.nullOr lib.types.path;
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default = null;
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description = lib.mdDoc "Path to the signing key that will be used for signing the cache";
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};
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package = lib.mkPackageOptionMD pkgs "harmonia" { };
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settings = lib.mkOption {
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inherit (format) type;
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default = { };
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description = lib.mdDoc ''
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Settings to merge with the default configuration.
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For the list of the default configuration, see <https://github.com/nix-community/harmonia/tree/master#configuration>.
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'';
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};
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};
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};
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config = lib.mkIf cfg.enable {
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systemd.services.harmonia = {
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description = "harmonia binary cache service";
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requires = [ "nix-daemon.socket" ];
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after = [ "network.target" ];
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wantedBy = [ "multi-user.target" ];
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environment = {
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CONFIG_FILE = format.generate "harmonia.toml" cfg.settings;
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SIGN_KEY_PATH = lib.mkIf (cfg.signKeyPath != null) "%d/sign-key";
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# Note: it's important to set this for nix-store, because it wants to use
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# $HOME in order to use a temporary cache dir. bizarre failures will occur
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# otherwise
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HOME = "/run/harmonia";
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};
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serviceConfig = {
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ExecStart = lib.getExe cfg.package;
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User = "harmonia";
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Group = "harmonia";
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DynamicUser = true;
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PrivateUsers = true;
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DeviceAllow = [ "" ];
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UMask = "0066";
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RuntimeDirectory = "harmonia";
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LoadCredential = lib.mkIf (cfg.signKeyPath != null) [ "sign-key:${cfg.signKeyPath}" ];
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SystemCallFilter = [
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"@system-service"
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"~@privileged"
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"~@resources"
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];
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CapabilityBoundingSet = "";
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ProtectKernelModules = true;
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ProtectKernelTunables = true;
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ProtectControlGroups = true;
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ProtectKernelLogs = true;
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ProtectHostname = true;
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ProtectClock = true;
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RestrictRealtime = true;
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MemoryDenyWriteExecute = true;
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ProcSubset = "pid";
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ProtectProc = "invisible";
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RestrictNamespaces = true;
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SystemCallArchitectures = "native";
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PrivateNetwork = false;
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PrivateTmp = true;
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PrivateDevices = true;
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PrivateMounts = true;
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NoNewPrivileges = true;
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ProtectSystem = "strict";
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ProtectHome = true;
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LockPersonality = true;
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RestrictAddressFamilies = "AF_UNIX AF_INET AF_INET6";
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LimitNOFILE = 65536;
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};
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};
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};
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}
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