(CommandList
  children: [
    (C {(set)} {(-e)})
    (C {(cd)} 
      {
        (DQ 
          (CommandSubPart
            command_list: (CommandList children:[(C {(dirname)} {(DQ ($ VSub_Number "$0"))})])
            left_token: <Left_CommandSub "$(">
            spids: [16 22]
          ) (/..)
        )
      }
    )
    (C {(script/bootstrap)})
    (C {(echo)} {(DQ ("==> Updating db\u2026"))})
    (C {(bin/rake)} {(db) (Lit_Other ":") (migrate)})
  ]
)