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# This is a fork of the nixpkgs module for Harmonia, which adds compatibility
# with Nix 2.3.
#
# We will upstream this eventually.
{ config, pkgs, lib, ... }:
let
cfg = config.services.depot.harmonia;
format = pkgs.formats.toml { };
credentials = lib.imap0
(i: signKeyPath: {
id = "sign-key-${builtins.toString i}";
path = signKeyPath;
})
cfg.signKeyPaths;
in
{
options = {
services.depot.harmonia = {
enable = lib.mkEnableOption "Harmonia: Nix binary cache written in Rust";
signKeyPaths = lib.mkOption {
type = lib.types.listOf lib.types.path;
default = [ ];
description = "Paths to the signing keys to use for signing the cache";
};
package = lib.mkPackageOption pkgs "harmonia" { };
settings = lib.mkOption {
inherit (format) type;
default = { };
description = ''
Settings to merge with the default configuration.
For the list of the default configuration, see <https://github.com/nix-community/harmonia/tree/master#configuration>.
'';
};
};
};
config = lib.mkIf cfg.enable {
users.users.harmonia = {
isSystemUser = true;
group = "harmonia";
};
users.groups.harmonia = { };
systemd.services.harmonia = {
description = "harmonia binary cache service";
requires = [ "nix-daemon.socket" ];
after = [ "network.target" ];
wantedBy = [ "multi-user.target" ];
environment = {
CONFIG_FILE = format.generate "harmonia.toml" cfg.settings;
SIGN_KEY_PATHS = lib.strings.concatMapStringsSep " "
(
credential: "%d/${credential.id}"
)
credentials;
# Note: it's important to set this for nix-store, because it wants to use
# $HOME in order to use a temporary cache dir. bizarre failures will occur
# otherwise
HOME = "/run/harmonia";
};
serviceConfig = {
ExecStart = lib.getExe cfg.package;
User = "harmonia";
Group = "harmonia";
Restart = "on-failure";
PrivateUsers = true;
DeviceAllow = [ "" ];
UMask = "0066";
RuntimeDirectory = "harmonia";
LoadCredential = builtins.map (credential: "${credential.id}:${credential.path}") credentials;
SystemCallFilter = [
"@system-service"
"~@privileged"
"~@resources"
];
CapabilityBoundingSet = "";
ProtectKernelModules = true;
ProtectKernelTunables = true;
ProtectControlGroups = true;
ProtectKernelLogs = true;
ProtectHostname = true;
ProtectClock = true;
RestrictRealtime = true;
MemoryDenyWriteExecute = true;
ProcSubset = "pid";
ProtectProc = "invisible";
RestrictNamespaces = true;
SystemCallArchitectures = "native";
PrivateNetwork = false;
PrivateTmp = true;
PrivateDevices = true;
PrivateMounts = true;
NoNewPrivileges = true;
ProtectSystem = "strict";
ProtectHome = true;
LockPersonality = true;
RestrictAddressFamilies = "AF_UNIX AF_INET AF_INET6";
LimitNOFILE = 65536;
};
};
};
}
|
