(command.CommandList
  children: [
    (C {<Id.KW_Set set>} {<-e>})
    (command.ShAssignment
      pairs: [
        (assign_pair
          lhs: (sh_lhs_expr.Name name:unifdef)
          op: assign_op.Equal
          rhs: 
            {
              (DQ 
                (command_sub
                  left_token: <Id.Left_DollarParen '$('>
                  command_list: 
                    (command.CommandList
                      children: [(C {<dirname>} {(DQ ($ Id.VSub_Number '$0'))})]
                    )
                ) </unifdef>
              )
            }
          spids: [93]
        )
      ]
    )
    (command.If
      arms: [
        (if_arm
          cond: [
            (C {<Id.Lit_LBracket '['>} {<Id.KW_Bang '!'>} {<-e>} {(DQ ($ Id.VSub_DollarName '$unifdef'))} 
              {<Id.Lit_RBracket ']'>}
            )
          ]
          action: [
            (command.ShAssignment
              pairs: [
                (assign_pair
                  lhs: (sh_lhs_expr.Name name:unifdef)
                  op: assign_op.Equal
                  rhs: {<unifdef>}
                  spids: [122]
                )
              ]
            )
          ]
          spids: [105 119]
        )
      ]
    )
    (command.Case
      to_match: {(DQ ($ Id.VSub_At '$@'))}
      arms: [
        (case_arm
          pat_list: [{(DQ <'-d '>) <Id.Lit_Star '*'>}]
          action: [
            (command.Simple
              words: [{<echo>} {<DEBUGGING>}]
              redirects: [(redir.Redir op:<Id.Redir_GreatAnd '1>&'> fd:1 arg_word:{<2>})]
            )
            (command.ShAssignment
              pairs: [
                (assign_pair
                  lhs: (sh_lhs_expr.Name name:debug)
                  op: assign_op.Equal
                  rhs: {<-d>}
                  spids: [150]
                )
              ]
            )
            (C {<shift>})
          ]
          spids: [136 140 -1 156]
        )
      ]
    )
    (command.AndOr
      ops: [Id.Op_DPipe]
      children: [
        (command.ShAssignment
          pairs: [
            (assign_pair
              lhs: (sh_lhs_expr.Name name:tmp)
              op: assign_op.Equal
              rhs: 
                {
                  (command_sub
                    left_token: <Id.Left_DollarParen '$('>
                    command_list: 
                      (command.CommandList
                        children: [
                          (C {<mktemp>} {<-d>} 
                            {
                              (DQ 
                                (braced_var_sub
                                  token: <Id.VSub_Name TMPDIR>
                                  suffix_op: 
                                    (suffix_op.Unary
                                      op_id: Id.VTest_ColonHyphen
                                      arg_word: {<Id.Lit_Slash /> <tmp>}
                                    )
                                ) </> 
                                (braced_var_sub
                                  token: <Id.VSub_Number 0>
                                  suffix_op: 
                                    (suffix_op.Unary
                                      op_id: Id.VOp1_DPound
                                      arg_word: {<'*'> <Id.Lit_Slash />}
                                    )
                                ) <.XXXXXXXXXX>
                              )
                            }
                          )
                        ]
                      )
                  )
                }
              spids: [159]
            )
          ]
        )
        (command.ControlFlow token:<Id.ControlFlow_Exit exit> arg_word:{<2>})
      ]
    )
    (C {<trap>} {(SQ <'rm -r "$tmp" || exit 2'>)} {<EXIT>})
    (C {<export>} {<Id.Lit_VarLike 'LC_ALL='> <C>})
    (command.Pipeline
      children: [
        (C {(DQ ($ Id.VSub_DollarName '$unifdef'))} {($ Id.VSub_DollarName '$debug')} {<-s>} 
          {(DQ ($ Id.VSub_At '$@'))}
        )
        (C {<sort>} {<-u>})
        (command.Simple
          words: [{<sed>} {(SQ <'s/^/#undef /'>)}]
          redirects: [
            (redir.Redir
              op: <Id.Redir_Great '>'>
              fd: -1
              arg_word: {(DQ ($ Id.VSub_DollarName '$tmp') </undefs>)}
            )
          ]
        )
      ]
      negated: F
    )
    (command.Pipeline
      children: [
        (C {<cc>} {<-E>} {<-dM>} {(DQ ($ Id.VSub_At '$@'))})
        (command.Simple
          words: [{<sort>}]
          redirects: [
            (redir.Redir
              op: <Id.Redir_Great '>'>
              fd: -1
              arg_word: {(DQ ($ Id.VSub_DollarName '$tmp') </defs>)}
            )
          ]
        )
      ]
      negated: F
    )
    (command.Case
      to_match: {($ Id.VSub_DollarName '$debug')}
      arms: [
        (case_arm
          pat_list: [{<-d>}]
          action: [
            (command.Simple
              words: [
                {<cat>}
                {(DQ ($ Id.VSub_DollarName '$tmp') </undefs>)}
                {(DQ ($ Id.VSub_DollarName '$tmp') </defs>)}
              ]
              redirects: [(redir.Redir op:<Id.Redir_GreatAnd '1>&'> fd:1 arg_word:{<2>})]
            )
          ]
          spids: [269 270 -1 287]
        )
      ]
    )
    (C {(DQ ($ Id.VSub_DollarName '$unifdef'))} {($ Id.VSub_DollarName '$debug')} {<-k>} {<-f>} 
      {(DQ ($ Id.VSub_DollarName '$tmp') </undefs>)} {<-f>} {(DQ ($ Id.VSub_DollarName '$tmp') </defs>)} {(DQ ($ Id.VSub_At '$@'))}
    )
  ]
)