l: add missing muchsync.nix

lass/2configs/muchsync.nix

@@ -0,0 +1,40 @@
+with (import <stockholm/lib>);
+{ config, pkgs, ... }:
+
+{
+  systemd.services.muchsync = let
+    hosts = [
+      "mors.r"
+      "green.r"
+      "blue.r"
+    ];
+  in {
+    description = "sync mails";
+    environment = {
+      NOTMUCH_CONFIG = config.environment.variables.NOTMUCH_CONFIG;
+    };
+    after = [ "network.target" ];
+
+    restartIfChanged = false;
+
+    path = [
+      pkgs.notmuch
+      pkgs.openssh
+    ];
+
+    startAt = "*:*"; # run every minute
+    serviceConfig = {
+      User = "lass";
+      Type = "oneshot";
+      ExecStart = pkgs.writeDash "sync-mails" ''
+        set -euf
+
+        /run/current-system/sw/bin/nm-tag-init 2>/dev/null
+        ${concatMapStringsSep "\n" (host: ''
+          echo syncing ${host}:
+          ${pkgs.muchsync}/bin/muchsync -s 'ssh -CTaxq -o ConnectTimeout=4' --nonew lass@${host} || :
+        '') hosts}
+      '';
+    };
+  };
+}