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|
{ config, lib, pkgs, ... }:
with lib;
let
cfg = config.services.go-neb;
settingsFormat = pkgs.formats.yaml {};
configFile = settingsFormat.generate "config.yaml" cfg.config;
in {
options.services.go-neb = {
enable = mkEnableOption "Extensible matrix bot written in Go";
bindAddress = mkOption {
type = types.str;
description = "Port (and optionally address) to listen on.";
default = ":4050";
};
secretFile = mkOption {
type = types.nullOr types.path;
default = null;
example = "/run/keys/go-neb.env";
description = ''
Environment variables from this file will be interpolated into the
final config file using envsubst with this syntax: <literal>$ENVIRONMENT</literal>
or <literal>''${VARIABLE}</literal>.
The file should contain lines formatted as <literal>SECRET_VAR=SECRET_VALUE</literal>.
This is useful to avoid putting secrets into the nix store.
'';
};
baseUrl = mkOption {
type = types.str;
description = "Public-facing endpoint that can receive webhooks.";
};
config = mkOption {
inherit (settingsFormat) type;
description = ''
Your <filename>config.yaml</filename> as a Nix attribute set.
See <link xlink:href="https://github.com/matrix-org/go-neb/blob/master/config.sample.yaml">config.sample.yaml</link>
for possible options.
'';
};
};
config = mkIf cfg.enable {
systemd.services.go-neb = let
finalConfigFile = if cfg.secretFile == null then configFile else "/var/run/go-neb/config.yaml";
in {
description = "Extensible matrix bot written in Go";
after = [ "network.target" ];
wantedBy = [ "multi-user.target" ];
environment = {
BASE_URL = cfg.baseUrl;
BIND_ADDRESS = cfg.bindAddress;
CONFIG_FILE = finalConfigFile;
};
serviceConfig = {
ExecStartPre = lib.optional (cfg.secretFile != null)
(pkgs.writeShellScript "pre-start" ''
umask 077
export $(xargs < ${cfg.secretFile})
${pkgs.envsubst}/bin/envsubst -i "${configFile}" > ${finalConfigFile}
chown go-neb ${finalConfigFile}
'');
PermissionsStartOnly = true;
RuntimeDirectory = "go-neb";
ExecStart = "${pkgs.go-neb}/bin/go-neb";
User = "go-neb";
DynamicUser = true;
};
};
};
meta.maintainers = with maintainers; [ hexa maralorn ];
}
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