434 lines
13 KiB
Nix
434 lines
13 KiB
Nix
{ config, lib, pkgs, ... }:
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with lib;
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let
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cfg = config.test.services.syncthing;
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defaultUser = "syncthing";
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devices = mapAttrsToList (name: device: {
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deviceID = device.id;
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inherit (device) name addresses introducer;
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}) cfg.declarative.devices;
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folders = mapAttrsToList ( _: folder: {
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inherit (folder) path id label type;
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devices = map (device: { deviceId = cfg.declarative.devices.${device}.id; }) folder.devices;
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rescanIntervalS = folder.rescanInterval;
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fsWatcherEnabled = folder.watch;
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fsWatcherDelayS = folder.watchDelay;
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ignorePerms = folder.ignorePerms;
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}) (filterAttrs (
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_: value:
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(value.path != null) && (value.devices != [])
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) cfg.declarative.folders);
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# get the api key by parsing the config.xml
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getApiKey = pkgs.writers.writeDash "getAPIKey" ''
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${pkgs.libxml2}/bin/xmllint \
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--xpath 'string(configuration/gui/apikey)'\
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${cfg.configDir}/config.xml
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'';
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updateConfig = pkgs.writers.writeDash "merge-syncthing-config" ''
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set -efu
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# wait for syncthing port to open
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until ${pkgs.curl}/bin/curl -Ss ${cfg.guiAddress} -o /dev/null; do
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sleep 1
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done
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API_KEY=$(${getApiKey})
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OLD_CFG=$(${pkgs.curl}/bin/curl -Ss \
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-H "X-API-Key: $API_KEY" \
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${cfg.guiAddress}/rest/system/config)
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# generate the new config by merging with the nixos config options
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NEW_CFG=$(echo "$OLD_CFG" | ${pkgs.jq}/bin/jq -s '.[] as $in | $in * {
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"devices": (${builtins.toJSON devices}${optionalString (! cfg.declarative.overrideDevices) " + $in.devices"}),
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"folders": (${builtins.toJSON folders}${optionalString (! cfg.declarative.overrideFolders) " + $in.folders"})
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}')
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# POST the new config to syncthing
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echo "$NEW_CFG" | ${pkgs.curl}/bin/curl -Ss \
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-H "X-API-Key: $API_KEY" \
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${cfg.guiAddress}/rest/system/config -d @-
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# restart syncthing after sending the new config
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${pkgs.curl}/bin/curl -Ss \
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-H "X-API-Key: $API_KEY" \
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-X POST \
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${cfg.guiAddress}/rest/system/restart
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'';
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in {
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###### interface
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options = {
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test.services.syncthing = {
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enable = mkEnableOption ''
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Syncthing - the self-hosted open-source alternative
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to Dropbox and Bittorrent Sync. Initial interface will be
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available on http://127.0.0.1:8384/.
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'';
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declarative = {
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cert = mkOption {
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type = types.nullOr types.str;
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default = null;
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description = ''
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Path to users cert.pem file, will be copied into the syncthing's
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<literal>configDir</literal>
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'';
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};
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key = mkOption {
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type = types.nullOr types.str;
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default = null;
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description = ''
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Path to users key.pem file, will be copied into the syncthing's
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<literal>configDir</literal>
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'';
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};
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overrideDevices = mkOption {
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type = types.bool;
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default = true;
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description = ''
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Whether to delete the devices which are not configured via the
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<literal>declarative.devices</literal> option.
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If set to false, devices added via the webinterface will
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persist but will have to be deleted manually.
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'';
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};
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devices = mkOption {
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default = {};
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description = ''
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Peers/devices which syncthing should communicate with.
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'';
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example = [
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{
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name = "bigbox";
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id = "7CFNTQM-IMTJBHJ-3UWRDIU-ZGQJFR6-VCXZ3NB-XUH3KZO-N52ITXR-LAIYUAU";
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addresses = [ "tcp://192.168.0.10:51820" ];
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}
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];
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type = types.attrsOf (types.submodule ({ config, ... }: {
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options = {
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name = mkOption {
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type = types.str;
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default = config._module.args.name;
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description = ''
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Name of the device
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'';
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};
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addresses = mkOption {
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type = types.listOf types.str;
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default = [];
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description = ''
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The addresses used to connect to the device.
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If this is let empty, dynamic configuration is attempted
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'';
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};
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id = mkOption {
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type = types.str;
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description = ''
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The id of the other peer, this is mandatory. It's documented at
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https://docs.syncthing.net/dev/device-ids.html
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'';
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};
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introducer = mkOption {
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type = types.bool;
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default = false;
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description = ''
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If the device should act as an introducer and be allowed
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to add folders on this computer.
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'';
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};
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};
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}));
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};
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overrideFolders = mkOption {
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type = types.bool;
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default = true;
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description = ''
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Whether to delete the folders which are not configured via the
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<literal>declarative.folders</literal> option.
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If set to false, folders added via the webinterface will persist
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but will have to be deleted manually.
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'';
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};
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folders = mkOption {
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default = {};
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description = ''
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folders which should be shared by syncthing.
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'';
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type = types.attrsOf (types.submodule ({ config, ... }: {
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options = {
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path = mkOption {
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type = types.nullOr types.str;
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default = null;
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description = ''
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The path to the folder which should be shared.
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'';
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};
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id = mkOption {
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type = types.str;
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default = config._module.args.name;
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description = ''
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The id of the folder. Must be the same on all devices.
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'';
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};
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label = mkOption {
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type = types.str;
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default = config._module.args.name;
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description = ''
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The label of the folder.
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'';
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};
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devices = mkOption {
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type = types.listOf types.str;
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default = [];
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description = ''
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The devices this folder should be shared with. Must be defined
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in the <literal>declarative.devices</literal> attribute.
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'';
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};
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rescanInterval = mkOption {
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type = types.int;
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default = 3600;
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description = ''
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How often the folders should be rescaned for changes.
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'';
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};
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type = mkOption {
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type = types.enum [ "sendreceive" "sendonly" "receiveonly" ];
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default = "sendreceive";
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description = ''
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Whether to send only changes from this folder, only receive them
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or propagate both.
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'';
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};
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watch = mkOption {
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type = types.bool;
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default = true;
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description = ''
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Whether the folder should be watched for changes by inotify.
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'';
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};
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watchDelay = mkOption {
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type = types.int;
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default = 10;
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description = ''
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The delay after an inotify event is triggered.
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'';
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};
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ignorePerms = mkOption {
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type = types.bool;
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default = true;
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description = ''
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Whether to propagate permission changes.
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'';
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};
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};
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}));
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};
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};
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guiAddress = mkOption {
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type = types.str;
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default = "127.0.0.1:8384";
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description = ''
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Address to serve the GUI.
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'';
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};
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systemService = mkOption {
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type = types.bool;
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default = true;
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description = "Auto launch Syncthing as a system service.";
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};
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user = mkOption {
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type = types.str;
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default = defaultUser;
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description = ''
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Syncthing will be run under this user (user will be created if it doesn't exist.
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This can be your user name).
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'';
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};
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group = mkOption {
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type = types.str;
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default = "nogroup";
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description = ''
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Syncthing will be run under this group (group will not be created if it doesn't exist.
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This can be your user name).
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'';
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};
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all_proxy = mkOption {
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type = with types; nullOr str;
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default = null;
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example = "socks5://address.com:1234";
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description = ''
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Overwrites all_proxy environment variable for the syncthing process to
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the given value. This is normaly used to let relay client connect
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through SOCKS5 proxy server.
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'';
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};
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dataDir = mkOption {
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type = types.path;
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default = "/var/lib/syncthing";
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description = ''
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Path where synced directories will exist.
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'';
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};
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configDir = mkOption {
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type = types.path;
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description = ''
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Path where the settings and keys will exist.
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'';
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default =
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let
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nixos = config.system.stateVersion;
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cond = versionAtLeast nixos "19.03";
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in cfg.dataDir + (optionalString cond "/.config/syncthing");
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};
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openDefaultPorts = mkOption {
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type = types.bool;
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default = false;
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example = literalExample "true";
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description = ''
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Open the default ports in the firewall:
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- TCP 22000 for transfers
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- UDP 21027 for discovery
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If multiple users are running syncthing on this machine, you will need to manually open a set of ports for each instance and leave this disabled.
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Alternatively, if are running only a single instance on this machine using the default ports, enable this.
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'';
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};
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package = mkOption {
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type = types.package;
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default = pkgs.syncthing;
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defaultText = "pkgs.syncthing";
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example = literalExample "pkgs.syncthing";
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description = ''
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Syncthing package to use.
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'';
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};
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};
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};
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imports = [
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(mkRemovedOptionModule ["services" "syncthing" "useInotify"] ''
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This option was removed because syncthing now has the inotify functionality included under the name "fswatcher".
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It can be enabled on a per-folder basis through the webinterface.
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'')
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];
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###### implementation
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config = mkIf cfg.enable {
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networking.firewall = mkIf cfg.openDefaultPorts {
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allowedTCPPorts = [ 22000 ];
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allowedUDPPorts = [ 21027 ];
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};
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systemd.packages = [ pkgs.syncthing ];
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users = mkIf (cfg.systemService && cfg.user == defaultUser) {
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users."${defaultUser}" =
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{ group = cfg.group;
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home = cfg.dataDir;
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createHome = true;
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uid = config.ids.uids.syncthing;
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description = "Syncthing daemon user";
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};
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groups."${defaultUser}".gid =
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config.ids.gids.syncthing;
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};
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systemd.services = {
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syncthing = mkIf cfg.systemService {
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description = "Syncthing service";
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after = [ "network.target" ];
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environment = {
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STNORESTART = "yes";
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STNOUPGRADE = "yes";
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inherit (cfg) all_proxy;
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} // config.networking.proxy.envVars;
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wantedBy = [ "multi-user.target" ];
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serviceConfig = {
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Restart = "on-failure";
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SuccessExitStatus = "2 3 4";
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RestartForceExitStatus="3 4";
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User = cfg.user;
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Group = cfg.group;
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ExecStartPre = mkIf (cfg.declarative.cert != null || cfg.declarative.key != null)
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"+${pkgs.writers.writeBash "syncthing-copy-keys" ''
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mkdir -p ${cfg.configDir}
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chown ${cfg.user}:${cfg.group} ${cfg.configDir}
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chmod 700 ${cfg.configDir}
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${optionalString (cfg.declarative.cert != null) ''
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cp ${toString cfg.declarative.cert} ${cfg.configDir}/cert.pem
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chown ${cfg.user}:${cfg.group} ${cfg.configDir}/cert.pem
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chmod 400 ${cfg.configDir}/cert.pem
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''}
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${optionalString (cfg.declarative.key != null) ''
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cp ${toString cfg.declarative.key} ${cfg.configDir}/key.pem
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chown ${cfg.user}:${cfg.group} ${cfg.configDir}/key.pem
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chmod 400 ${cfg.configDir}/key.pem
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''}
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''}"
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;
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ExecStart = ''
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${cfg.package}/bin/syncthing \
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-no-browser \
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-gui-address=${cfg.guiAddress} \
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-home=${cfg.configDir}
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'';
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};
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};
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syncthing-init = {
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after = [ "syncthing.service" ];
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wantedBy = [ "multi-user.target" ];
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serviceConfig = {
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User = cfg.user;
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RemainAfterExit = true;
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Type = "oneshot";
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ExecStart = updateConfig;
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};
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};
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syncthing-resume = {
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wantedBy = [ "suspend.target" ];
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};
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};
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};
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}
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