(CommandList
  children: [
    (Assignment
      keyword: Assign_None
      pairs: [
        (assign_pair
          lhs: (LeftVar name:SYSIMG)
          rhs: {(DQ (build/system-image-) ($ VSub_Number "$1"))}
          spids: [11]
        )
      ]
      spids: [11]
    )
    (If
      arms: [
        (if_arm
          cond: 
            (C {(Lit_Other "[")} {(KW_Bang "!")} {(-e)} {(DQ ($ VSub_Name "$SYSIMG"))} {(Lit_Other "]")})
          action: 
            (CommandList
              children: [
                (SimpleCommand
                  words: [{(echo)} {(DQ ("no ") ($ VSub_Name "$SYSIMG"))}]
                  redirects: [(Redirect op_id:Redir_GreatAnd arg_word:{(2)} fd:-1 spids:[42])]
                )
                (C {(exit)} {(1)})
              ]
            )
          spids: [-1 32]
        )
      ]
      spids: [-1 50]
    )
    (Assignment
      keyword: Assign_None
      pairs: [
        (assign_pair
          lhs: (LeftVar name:PATH)
          rhs: 
            {
              (DQ ($ VSub_Name "$PWD") ("/build/host:") ($ VSub_Name "$PWD") (/build/native-compiler-) 
                ($ VSub_Number "$1") (":") ($ VSub_Name "$PATH")
              )
            }
          spids: [53]
        )
      ]
      spids: [53]
    )
    (Assignment
      keyword: Assign_None
      pairs: [
        (assign_pair
          lhs: (LeftVar name:X)
          rhs: 
            {
              (CommandSubPart
                command_list: 
                  (SimpleCommand
                    words: [{(readlink)} {(-f)} {(DQ ($ VSub_Number "$2"))}]
                    redirects: [(Redirect op_id:Redir_Great arg_word:{(/dev/null)} fd:2 spids:[75])]
                  )
                spids: [66 77]
              )
            }
          spids: [65]
        )
      ]
      spids: [65]
    )
    (If
      arms: [
        (if_arm
          cond: (C {(Lit_Other "[")} {(-z)} {(DQ ($ VSub_Name "$X"))} {(Lit_Other "]")})
          action: 
            (CommandList
              children: [
                (SimpleCommand
                  words: [{(echo)} {(DQ ("No control image ") ($ VSub_Number "$2"))}]
                  redirects: [(Redirect op_id:Redir_GreatAnd arg_word:{(2)} fd:-1 spids:[101])]
                )
                (C {(exit)} {(1)})
              ]
            )
          spids: [-1 91]
        )
      ]
      spids: [-1 109]
    )
    (AndOr
      children: [
        (C {(cd)} {(DQ ($ VSub_Name "$SYSIMG"))})
        (C {(./native-build.sh)} {(DQ ($ VSub_Name "$X"))})
      ]
      op_id: Op_DAmp
    )
  ]
)