vno1-oh2: pass ssh key to borg

modules/base/zfsborg/default.nix

@@ -19,6 +19,7 @@ in {
     enable = lib.mkEnableOption "backup zfs snapshots with borg";
 
     passwordPath = lib.mkOption {type = str;};
+    sshKeyPath = lib.mkOption {type = nullOr path; default = null;};
 
     mountpoints = lib.mkOption {
       default = {};
@@ -86,6 +87,8 @@ in {
           }
           // lib.optionalAttrs (attrs ? patterns) {
             patterns = attrs.patterns;
+          } // lib.optionalAttrs (config.mj.base.zfsborg.sshKeyPath != null) {
+            environment.BORG_RSH = ''ssh -i "${config.mj.base.zfsborg.sshKeyPath}"'';
           };
       })
     config.mj.base.zfsborg.mountpoints;