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{ ... }:
{
config,
lib,
pkgs,
...
}:
let
inherit (lib) types;
cfg = config.tgc.services.mautrixBridge;
forEachInstance =
f: lib.flip lib.mapAttrs' cfg (name: cfg: lib.nameValuePair "mautrixBridge-${name}" (f name cfg));
in
{
# todo: add some documentation
options.tgc.services.mautrixBridge = lib.mkOption {
default = { };
type = types.attrsOf (
types.submodule {
options = {
enable = lib.mkOption {
type = types.bool;
default = false;
};
package = lib.mkOption {
type = types.package;
};
settings = lib.mkOption {
type = (pkgs.formats.json { }).type;
default = { };
};
environmentFile = lib.mkOption {
type = with types; nullOr path;
default = null;
};
serviceDependencies = lib.mkOption {
type = with types; listOf str;
default = [ ];
};
};
}
);
};
config = {
systemd.services = forEachInstance (
name: cfg:
let
dataDir = "/var/lib/mautrix-${name}";
registrationFile = "${dataDir}/registration.yaml";
settingsFile = "${dataDir}/config.yaml";
settingsFileUnsubstituted =
(pkgs.formats.json { }).generate "mautrix-${name}-config-unsubstituted.json"
cfg.settings;
in
{
enable = cfg.enable;
description = "mautrixBridge-${name}, a matrix puppeting bridge.";
restartTriggers = [ settingsFileUnsubstituted ];
wantedBy = [ "multi-user.target" ];
wants = [ "network-online.target" ] ++ cfg.serviceDependencies;
after = [ "network-online.target" ] ++ cfg.serviceDependencies;
path = [ pkgs.ffmpeg-headless ];
preStart = ''
# substitute the settings file by environment variables
# in this case read from EnvironmentFile
test -f '${settingsFile}' && rm -f '${settingsFile}'
old_umask=$(umask)
umask 0177
${pkgs.envsubst}/bin/envsubst \
-o '${settingsFile}' \
-i '${settingsFileUnsubstituted}'
umask $old_umask
# generate the appservice's registration file if absent
if [ ! -f '${registrationFile}' ]; then
${lib.getExe cfg.package} \
--generate-registration \
--config='${settingsFile}' \
--registration='${registrationFile}'
fi
chmod 640 ${registrationFile}
umask 0177
#todo: switch to `yq-go`
${lib.getExe pkgs.yq} -s '
.[0].appservice.as_token = (.[0].appservice.as_token // .[1].as_token)
| .[0].appservice.hs_token = (.[0].appservice.hs_token // .[1].hs_token)
${lib.optionalString (
name == "telegram"
) "
| .[0].network.api_id = (.[0].network.api_id | tonumber)
"}
| .[0]' \
'${settingsFile}' '${registrationFile}' > '${settingsFile}.tmp'
mv '${settingsFile}.tmp' '${settingsFile}'
umask $old_umask
'';
serviceConfig = {
Type = "exec";
DynamicUser = true;
User = "mautrixBridge-${name}";
Group = "mautrixBridge-${name}";
EnvironmentFile = cfg.environmentFile;
StateDirectory = baseNameOf dataDir;
WorkingDirectory = dataDir;
UMask = 27;
ExecStart = "${lib.getExe cfg.package} --no-update --config='${settingsFile}'";
Restart = "on-failure";
RestartSec = "30s";
LockPersonality = true;
NoNewPrivileges = true;
MemoryDenyWriteExecute = lib.mkIf (name != "signal") true;
PrivateDevices = true;
PrivateTmp = true;
PrivateUsers = true;
ProtectSystem = "strict";
ProtectClock = true;
ProtectHome = true;
ProtectHostname = true;
ProtectKernelLogs = true;
ProtectKernelModules = true;
ProtectKernelTunables = true;
ProtectControlGroups = true;
RestrictRealtime = true;
RestrictSUIDSGID = true;
SystemCallArchitectures = "native";
SystemCallErrorNumber = "EPERM";
SystemCallFilter = [ "@system-service" ];
};
}
);
};
}