134 lines
3.3 KiB
Nix
134 lines
3.3 KiB
Nix
{ config, lib, pkgs, ... }:
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with lib;
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let
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cfg = config.services.unison;
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pairOf = t:
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let list = types.addCheck (types.listOf t) (l: length l == 2);
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in list // { description = list.description + " of length 2"; };
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pairOptions = {
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options = {
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stateDirectory = mkOption {
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type = types.path;
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default = "${config.xdg.dataHome}/unison";
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defaultText = "$XDG_DATA_HOME/unison";
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description = ''
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Unison state directory to use.
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'';
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};
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commandOptions = mkOption rec {
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type = with types; attrsOf (either str (listOf str));
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apply = mergeAttrs default;
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default = {
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repeat = "watch";
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sshcmd = "${pkgs.openssh}/bin/ssh";
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ui = "text";
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auto = "true";
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batch = "true";
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log = "false"; # don't log to file, handled by systemd
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};
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description = ''
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Additional command line options as a dictionary to pass to the
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`unison` program.
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Use a list of strings to declare the same option multiple times.
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See
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{manpage}`unison(1)`
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for a list of available options.
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'';
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};
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roots = mkOption {
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type = pairOf types.str;
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example = literalExpression ''
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[
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"/home/user/documents"
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"ssh://remote/documents"
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]
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'';
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description = ''
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Pair of roots to synchronise.
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'';
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};
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};
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};
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serialiseArg = key: val:
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concatStringsSep " "
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(forEach (toList val) (x: escapeShellArg "-${key}=${escape [ "=" ] x}"));
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serialiseArgs = args: concatStringsSep " " (mapAttrsToList serialiseArg args);
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makeDefs = gen:
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mapAttrs'
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(name: pairCfg: nameValuePair "unison-pair-${name}" (gen name pairCfg))
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cfg.pairs;
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in {
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meta.maintainers = with maintainers; [ pacien ];
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options.services.unison = {
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enable = mkEnableOption "Unison synchronisation";
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package = mkPackageOption pkgs "unison" {
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example = "pkgs.unison.override { enableX11 = false; }";
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};
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pairs = mkOption {
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type = with types; attrsOf (submodule pairOptions);
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default = { };
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example = literalExpression ''
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{
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"my-documents" = {
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roots = [
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"/home/user/documents"
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"ssh://remote/documents"
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];
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};
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}
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'';
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description = ''
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Unison root pairs to keep synchronised.
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'';
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};
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};
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config = mkIf cfg.enable {
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assertions = [
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(lib.hm.assertions.assertPlatform "services.unison" pkgs
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lib.platforms.linux)
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];
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systemd.user.services = makeDefs (name: pairCfg: {
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Unit = {
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Description = "Unison pair sync (${name})";
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# Retry forever, useful in case of network disruption.
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StartLimitIntervalSec = 0;
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};
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Service = {
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Restart = "always";
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RestartSec = 60;
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CPUSchedulingPolicy = "idle";
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IOSchedulingClass = "idle";
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Environment = [ "UNISON='${toString pairCfg.stateDirectory}'" ];
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ExecStart = ''
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${cfg.package}/bin/unison \
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${serialiseArgs pairCfg.commandOptions} \
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${strings.concatMapStringsSep " " escapeShellArg pairCfg.roots}
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'';
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};
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Install = { WantedBy = [ "default.target" ]; };
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});
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};
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}
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