src/Pure/General/mercurial.scala

     hg
   }
 
   def find_repository(start: Path, ssh: SSH.System = SSH.Local): Option[Repository] =
   {
-    def find(root: Path): Option[Repository] =
+    @tailrec def find(root: Path): Option[Repository] =
       if (is_repository(root, ssh)) Some(repository(root, ssh = ssh))
       else if (root.is_root) None
       else find(root + Path.parent)
 
     find(ssh.expand_path(start))

           " --noninteractive " + name + " " + options + " " + args
       ssh.execute(cmdline)
     }
 
     def add(files: List[Path]): Unit =
-      hg.command("add", files.map(ssh.bash_path(_)).mkString(" "))
+      hg.command("add", files.map(ssh.bash_path).mkString(" "))
 
     def archive(target: String, rev: String = "", options: String = ""): Unit =
       hg.command("archive", opt_rev(rev) + " " + Bash.string(target), options).check
 
     def heads(template: String = "{node|short}\n", options: String = ""): List[String] =