nixpkgs/nixos/modules/services/system/cachix-watch-store.nix
2023-04-18 10:58:33 +01:00

94 lines
2.7 KiB
Nix

{ config, pkgs, lib, ... }:
with lib;
let
cfg = config.services.cachix-watch-store;
in
{
meta.maintainers = [ lib.maintainers.jfroche lib.maintainers.domenkozar ];
options.services.cachix-watch-store = {
enable = mkEnableOption (lib.mdDoc "Cachix Watch Store: https://docs.cachix.org");
cacheName = mkOption {
type = types.str;
description = lib.mdDoc "Cachix binary cache name";
};
cachixTokenFile = mkOption {
type = types.path;
description = lib.mdDoc ''
Required file that needs to contain the cachix auth token.
'';
};
compressionLevel = mkOption {
type = types.nullOr types.int;
description = lib.mdDoc "The compression level for ZSTD compression (between 0 and 16)";
default = null;
};
jobs = mkOption {
type = types.nullOr types.int;
description = lib.mdDoc "Number of threads used for pushing store paths";
default = null;
};
host = mkOption {
type = types.nullOr types.str;
default = null;
description = lib.mdDoc "Cachix host to connect to";
};
verbose = mkOption {
type = types.bool;
description = lib.mdDoc "Enable verbose output";
default = false;
};
package = mkOption {
type = types.package;
default = pkgs.cachix;
defaultText = literalExpression "pkgs.cachix";
description = lib.mdDoc "Cachix Client package to use.";
};
};
config = mkIf cfg.enable {
systemd.services.cachix-watch-store-agent = {
description = "Cachix watch store Agent";
after = [ "network-online.target" ];
path = [ config.nix.package ];
wantedBy = [ "multi-user.target" ];
unitConfig = {
# allow to restart indefinitely
StartLimitIntervalSec = 0;
};
serviceConfig = {
# don't put too much stress on the machine when restarting
RestartSec = 1;
# we don't want to kill children processes as those are deployments
KillMode = "process";
Restart = "on-failure";
DynamicUser = true;
LoadCredential = [
"cachix-token:${toString cfg.cachixTokenFile}"
];
};
script =
let
command = [ "${cfg.package}/bin/cachix" ]
++ (lib.optional cfg.verbose "--verbose") ++ (lib.optionals (cfg.host != null) [ "--host" cfg.host ])
++ [ "watch-store" ] ++ (lib.optionals (cfg.compressionLevel != null) [ "--compression-level" (toString cfg.compressionLevel) ])
++ (lib.optionals (cfg.jobs != null) [ "--jobs" (toString cfg.jobs) ]) ++ [ cfg.cacheName ];
in
''
export CACHIX_AUTH_TOKEN="$(<"$CREDENTIALS_DIRECTORY/cachix-token")"
${lib.escapeShellArgs command}
'';
};
};
}