nixpkgs/nixos/modules/services/networking/btsync.nix

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{ config, lib, pkgs, ... }:
with lib;
let
cfg = config.services.btsync;
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bittorrentSync = cfg.package;
listenAddr = cfg.httpListenAddr + ":" + (toString cfg.httpListenPort);
boolStr = x: if x then "true" else "false";
optionalEmptyStr = b: v: optionalString (b != "") v;
webUIConfig = optionalString cfg.enableWebUI
''
"webui":
{
${optionalEmptyStr cfg.httpLogin "\"login\": \"${cfg.httpLogin}\","}
${optionalEmptyStr cfg.httpPass "\"password\": \"${cfg.httpPass}\","}
${optionalEmptyStr cfg.apiKey "\"api_key\": \"${cfg.apiKey}\","}
"listen": "${listenAddr}"
}
'';
knownHosts = e:
optionalString (e ? "knownHosts")
(concatStringsSep "," (map (v: "\"${v}\"") e."knownHosts"));
sharedFoldersRecord =
concatStringsSep "," (map (entry:
let helper = attr: v:
if (entry ? attr) then boolStr entry.attr else boolStr v;
in
''
{
"secret": "${entry.secret}",
"dir": "${entry.directory}",
"use_relay_server": ${helper "useRelayServer" true},
"use_tracker": ${helper "useTracker" true},
"use_dht": ${helper "useDHT" false},
"search_lan": ${helper "searchLAN" true},
"use_sync_trash": ${helper "useSyncTrash" true},
"known_hosts": [${knownHosts entry}]
}
'') cfg.sharedFolders);
sharedFoldersConfig = optionalString (cfg.sharedFolders != [])
''
"shared_folders":
[
${sharedFoldersRecord}
]
'';
configFile = pkgs.writeText "btsync.config"
''
{
"device_name": "${cfg.deviceName}",
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"storage_path": "${cfg.storagePath}",
"listening_port": ${toString cfg.listeningPort},
"use_gui": false,
"check_for_updates": ${boolStr cfg.checkForUpdates},
"use_upnp": ${boolStr cfg.useUpnp},
"download_limit": ${toString cfg.downloadLimit},
"upload_limit": ${toString cfg.uploadLimit},
"lan_encrypt_data": ${boolStr cfg.encryptLAN},
${webUIConfig}
${sharedFoldersConfig}
}
'';
in
{
options = {
services.btsync = {
enable = mkOption {
type = types.bool;
default = false;
description = ''
If enabled, start the Bittorrent Sync daemon. Once enabled,
you can interact with the service through the Web UI, or
configure it in your NixOS configuration. Enabling the
<literal>btsync</literal> service also installs a
multi-instance systemd unit which can be used to start
user-specific copies of the daemon. Once installed, you can
use <literal>systemctl start btsync@user</literal> to start
the daemon only for user <literal>user</literal>, using the
configuration file located at
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<literal>$HOME/.config/btsync.conf</literal>.
'';
};
deviceName = mkOption {
type = types.str;
example = "Voltron";
description = ''
Name of the Bittorrent Sync device.
'';
};
listeningPort = mkOption {
type = types.int;
default = 0;
example = 44444;
description = ''
Listening port. Defaults to 0 which randomizes the port.
'';
};
checkForUpdates = mkOption {
type = types.bool;
default = true;
description = ''
Determines whether to check for updates and alert the user
about them in the UI.
'';
};
useUpnp = mkOption {
type = types.bool;
default = true;
description = ''
Use Universal Plug-n-Play (UPnP)
'';
};
downloadLimit = mkOption {
type = types.int;
default = 0;
example = 1024;
description = ''
Download speed limit. 0 is unlimited (default).
'';
};
uploadLimit = mkOption {
type = types.int;
default = 0;
example = 1024;
description = ''
Upload speed limit. 0 is unlimited (default).
'';
};
httpListenAddr = mkOption {
type = types.str;
default = "0.0.0.0";
example = "1.2.3.4";
description = ''
HTTP address to bind to.
'';
};
httpListenPort = mkOption {
type = types.int;
default = 9000;
description = ''
HTTP port to bind on.
'';
};
httpLogin = mkOption {
type = types.str;
example = "allyourbase";
default = "";
description = ''
HTTP web login username.
'';
};
httpPass = mkOption {
type = types.str;
example = "arebelongtous";
default = "";
description = ''
HTTP web login password.
'';
};
encryptLAN = mkOption {
type = types.bool;
default = true;
description = "Encrypt LAN data.";
};
enableWebUI = mkOption {
type = types.bool;
default = false;
description = ''
Enable Web UI for administration. Bound to the specified
<literal>httpListenAddress</literal> and
<literal>httpListenPort</literal>.
'';
};
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package = mkOption {
type = types.package;
example = literalExample "pkgs.bittorrentSync20";
description = ''
Branch of bittorrent sync to use.
'';
};
storagePath = mkOption {
type = types.path;
default = "/var/lib/btsync/";
example = "/var/lib/btsync/";
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description = ''
Where to store the bittorrent sync files.
'';
};
apiKey = mkOption {
type = types.str;
default = "";
description = "API key, which enables the developer API.";
};
sharedFolders = mkOption {
default = [];
example =
[ { secret = "AHMYFPCQAHBM7LQPFXQ7WV6Y42IGUXJ5Y";
directory = "/home/user/sync_test";
useRelayServer = true;
useTracker = true;
useDHT = false;
searchLAN = true;
useSyncTrash = true;
knownHosts =
[ "192.168.1.2:4444"
"192.168.1.3:4444"
];
}
];
description = ''
Shared folder list. If enabled, web UI must be
disabled. Secrets can be generated using <literal>btsync
--generate-secret</literal>. Note that this secret will be
put inside the Nix store, so it is realistically not very
secret.
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If you would like to be able to modify the contents of this
directories, it is recommended that you make your user a
member of the <literal>btsync</literal> group.
Directories in this list should be in the
<literal>btsync</literal> group, and that group must have
write access to the directory. It is also recommended that
<literal>chmod g+s</literal> is applied to the directory
so that any sub directories created will also belong to
the <literal>btsync</literal> group. Also,
<literal>setfacl -d -m group:btsync:rwx</literal> and
<literal>setfacl -m group:btsync:rwx</literal> should also
be applied so that the sub directories are writable by
the group.
'';
};
};
};
config = mkIf cfg.enable {
assertions =
[ { assertion = cfg.deviceName != "";
message = "Device name cannot be empty.";
}
{ assertion = cfg.enableWebUI -> cfg.sharedFolders == [];
message = "If using shared folders, the web UI cannot be enabled.";
}
{ assertion = cfg.apiKey != "" -> cfg.enableWebUI;
message = "If you're using an API key, you must enable the web server.";
}
];
services.btsync.package = mkOptionDefault pkgs.bittorrentSync14;
users.extraUsers.btsync = {
description = "Bittorrent Sync Service user";
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home = cfg.storagePath;
createHome = true;
uid = config.ids.uids.btsync;
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group = "btsync";
};
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users.extraGroups = [
{ name = "btsync";
}];
systemd.services.btsync = with pkgs; {
description = "Bittorrent Sync Service";
wantedBy = [ "multi-user.target" ];
after = [ "network.target" "local-fs.target" ];
serviceConfig = {
Restart = "on-abort";
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UMask = "0002";
User = "btsync";
ExecStart =
"${bittorrentSync}/bin/btsync --nodaemon --config ${configFile}";
};
};
systemd.services."btsync@" = with pkgs; {
description = "Bittorrent Sync Service for %i";
after = [ "network.target" "local-fs.target" ];
serviceConfig = {
Restart = "on-abort";
User = "%i";
ExecStart =
"${bittorrentSync}/bin/btsync --nodaemon --config %h/.config/btsync.conf";
};
};
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environment.systemPackages = [ cfg.package ];
};
}