(command.CommandList
  children: [
    (command.Simple
      blame_tok: <Id.Lit_Colon ':'>
      more_env: []
      words: [{<Id.Lit_Colon ':'>} {<vex>} {<skip>} {<expand>} {<command>} {<Id.Lit_TDot ...>}]
      redirects: []
      do_fork: T
    )
    (command.Case
      case_kw: <Id.KW_Case case>
      to_match: (case_arg.Word w:{($ Id.VSub_Pound '#')})
      arms_start: <Id.KW_In in>
      arms: [
        (CaseArm
          left: <Id.Lit_LBracket '['>
          pattern: (pat.Words words:[{<Id.Lit_LBracket '['> <012> <Id.Lit_RBracket ']'>}])
          middle: <Id.Right_CasePat _>
          action: [
            (command.Sentence
              child: 
                (command.Simple
                  blame_tok: <print>
                  more_env: []
                  words: [
                    {<print>}
                    {<-u2>}
                    {(DQ <'Usage: '> ($ Id.VSub_Number 0) <' skip expand command ...'>)}
                  ]
                  redirects: []
                  do_fork: T
                )
              terminator: <Id.Op_Semi _>
            )
            (command.ControlFlow keyword:<Id.ControlFlow_Exit exit> arg_word:{<1>})
          ]
          right: <Id.Op_DSemi _>
        )
      ]
      arms_end: <Id.KW_Esac esac>
      redirects: []
    )
    (command.ShAssignment
      left: <Id.Lit_VarLike 'skip='>
      pairs: [
        (AssignPair
          left: <Id.Lit_VarLike 'skip='>
          lhs: (sh_lhs_expr.Name left:<Id.Lit_VarLike 'skip='> name:skip)
          op: assign_op.Equal
          rhs: {($ Id.VSub_Number 1)}
        )
      ]
      redirects: []
    )
    (command.Simple blame_tok:<shift> more_env:[] words:[{<shift>}] redirects:[] do_fork:T)
    (command.ShAssignment
      left: <Id.Lit_VarLike 'expand='>
      pairs: [
        (AssignPair
          left: <Id.Lit_VarLike 'expand='>
          lhs: (sh_lhs_expr.Name left:<Id.Lit_VarLike 'expand='> name:expand)
          op: assign_op.Equal
          rhs: {($ Id.VSub_Number 1)}
        )
      ]
      redirects: []
    )
    (command.Simple blame_tok:<shift> more_env:[] words:[{<shift>}] redirects:[] do_fork:T)
    (command.ShAssignment
      left: <Id.Lit_VarLike 'command='>
      pairs: [
        (AssignPair
          left: <Id.Lit_VarLike 'command='>
          lhs: (sh_lhs_expr.Name left:<Id.Lit_VarLike 'command='> name:command)
          op: assign_op.Equal
          rhs: {($ Id.VSub_Number 1)}
        )
      ]
      redirects: []
    )
    (command.Simple blame_tok:<shift> more_env:[] words:[{<shift>}] redirects:[] do_fork:T)
    (command.Simple
      blame_tok: <integer>
      more_env: []
      words: [{<integer>} {<Id.Lit_VarLike 'argc='> <0>} {<Id.Lit_VarLike 'noexpand='> <0>}]
      redirects: []
      do_fork: T
    )
    (command.ForEach
      keyword: <Id.KW_For for>
      iter_names: [arg]
      iterable: (for_iter__Args)
      body: 
        (command.DoGroup
          left: <Id.KW_Do do>
          children: [
            (command.If
              if_kw: <Id.KW_If if>
              arms: [
                (IfArm
                  keyword: <Id.KW_If if>
                  cond: 
                    (condition.Shell
                      commands: [
                        (command.DParen
                          left: <Id.Op_DLeftParen _>
                          child: ($ Id.Lit_ArithVarLike noexpand)
                          right: <Id.Op_DRightParen _>
                          redirects: []
                        )
                      ]
                    )
                  then_kw: <Id.KW_Then then>
                  action: [
                    (command.ShAssignment
                      left: <Id.Lit_VarLike 'noexpand='>
                      pairs: [
                        (AssignPair
                          left: <Id.Lit_VarLike 'noexpand='>
                          lhs: (sh_lhs_expr.Name left:<Id.Lit_VarLike 'noexpand='> name:noexpand)
                          op: assign_op.Equal
                          rhs: {<0>}
                        )
                      ]
                      redirects: []
                    )
                  ]
                  spids: [140 148]
                )
              ]
              else_kw: <Id.KW_Else else>
              else_action: [
                (command.Case
                  case_kw: <Id.KW_Case case>
                  to_match: (case_arg.Word w:{($ Id.VSub_DollarName arg)})
                  arms_start: <Id.KW_In in>
                  arms: [
                    (CaseArm
                      left: <->
                      pattern: 
                        (pat.Words
                          words: [
                            {<-> <Id.Lit_LBracket '['> ($ Id.VSub_DollarName skip) 
                              <Id.Lit_RBracket ']'>
                            }
                          ]
                        )
                      middle: <Id.Right_CasePat _>
                      action: [
                        (command.ShAssignment
                          left: <Id.Lit_VarLike 'noexpand='>
                          pairs: [
                            (AssignPair
                              left: <Id.Lit_VarLike 'noexpand='>
                              lhs: (sh_lhs_expr.Name left:<Id.Lit_VarLike 'noexpand='> name:noexpand)
                              op: assign_op.Equal
                              rhs: {<1>}
                            )
                          ]
                          redirects: []
                        )
                      ]
                      right: <Id.Op_DSemi _>
                    )
                    (CaseArm
                      left: <->
                      pattern: (pat.Words words:[{<-> <Id.Lit_Star '*'>}])
                      middle: <Id.Right_CasePat _>
                      action: []
                      right: <Id.Op_DSemi _>
                    )
                    (CaseArm
                      left: <Id.VSub_DollarName '$expand'>
                      pattern: (pat.Words words:[{($ Id.VSub_DollarName expand)}])
                      middle: <Id.Right_CasePat _>
                      action: [
                        (command.ShAssignment
                          left: <Id.Lit_VarLike 'x='>
                          pairs: [
                            (AssignPair
                              left: <Id.Lit_VarLike 'x='>
                              lhs: (sh_lhs_expr.Name left:<Id.Lit_VarLike 'x='> name:x)
                              op: assign_op.Equal
                              rhs: 
                                {
                                  (CommandSub
                                    left_token: <Id.Left_DollarParen '$('>
                                    child: 
                                      (command.Simple
                                        blame_tok: <vpath>
                                        more_env: []
                                        words: [{<vpath>} {(DQ ($ Id.VSub_DollarName arg))}]
                                        redirects: [
                                          (Redir
                                            op: <Id.Redir_Great '2>'>
                                            loc: (redir_loc.Fd fd:2)
                                            arg: {<'/dev/null'>}
                                          )
                                        ]
                                        do_fork: T
                                      )
                                    right: <Id.Eof_RParen _>
                                  )
                                }
                            )
                          ]
                          redirects: []
                        )
                        (command.Case
                          case_kw: <Id.KW_Case case>
                          to_match: (case_arg.Word w:{($ Id.VSub_DollarName x)})
                          arms_start: <Id.KW_In in>
                          arms: [
                            (CaseArm
                              left: <Id.Lit_QMark '?'>
                              pattern: (pat.Words words:[{<Id.Lit_QMark '?'> <Id.Lit_Star '*'>}])
                              middle: <Id.Right_CasePat _>
                              action: [
                                (command.ShAssignment
                                  left: <Id.Lit_VarLike 'arg='>
                                  pairs: [
                                    (AssignPair
                                      left: <Id.Lit_VarLike 'arg='>
                                      lhs: (sh_lhs_expr.Name left:<Id.Lit_VarLike 'arg='> name:arg)
                                      op: assign_op.Equal
                                      rhs: 
                                        {
                                          (BracedVarSub
                                            left: <Id.Left_DollarBrace '${'>
                                            token: <Id.VSub_Name x>
                                            var_name: x
                                            suffix_op: 
                                              (suffix_op.Unary
                                                op: <Id.VOp1_Pound '#'>
                                                arg_word: 
                                                  {($ Id.VSub_DollarName PWD) <Id.Lit_Slash '/'>}
                                              )
                                            right: <Id.Right_DollarBrace '}'>
                                          )
                                        }
                                    )
                                  ]
                                  redirects: []
                                )
                              ]
                              right: <Id.Op_DSemi _>
                            )
                          ]
                          arms_end: <Id.KW_Esac esac>
                          redirects: []
                        )
                      ]
                      right: <Id.Op_DSemi _>
                    )
                  ]
                  arms_end: <Id.KW_Esac esac>
                  redirects: []
                )
              ]
              fi_kw: <Id.KW_Fi fi>
              redirects: []
            )
            (command.ShAssignment
              left: <Id.Lit_ArrayLhsOpen 'argv['>
              pairs: [
                (AssignPair
                  left: <Id.Lit_ArrayLhsOpen 'argv['>
                  lhs: 
                    (sh_lhs_expr.IndexedName
                      left: <Id.Lit_ArrayLhsOpen 'argv['>
                      name: argv
                      index: ($ Id.Lit_ArithVarLike argc)
                    )
                  op: assign_op.Equal
                  rhs: {($ Id.VSub_DollarName arg)}
                )
              ]
              redirects: []
            )
            (command.DParen
              left: <Id.Op_DLeftParen _>
              child: 
                (arith_expr.BinaryAssign
                  op_id: Id.Arith_PlusEqual
                  left: ($ Id.Lit_ArithVarLike argc)
                  right: {<Id.Lit_Digits 1>}
                )
              right: <Id.Op_DRightParen _>
              redirects: []
            )
          ]
          right: <Id.KW_Done done>
        )
      redirects: []
    )
    (command.Simple
      blame_tok: <Id.Left_DoubleQuote '"'>
      more_env: []
      words: [
        {(DQ ($ Id.VSub_DollarName command))}
        {
          (DQ 
            (BracedVarSub
              left: <Id.Left_DollarBrace '${'>
              token: <Id.VSub_Name argv>
              var_name: argv
              bracket_op: (bracket_op.WholeArray op_id:Id.Lit_At)
              right: <Id.Right_DollarBrace '}'>
            )
          )
        }
      ]
      redirects: []
      do_fork: T
    )
  ]
)