(command.If
  arms: [
    (if_arm
      cond: 
        (condition.Shell
          commands: [
            (command.Sentence
              child: 
                (command.DBracket
                  expr: 
                    (bool_expr.Unary
                      op_id: Id.BoolUnary_z
                      child: {($ Id.VSub_DollarName '$_Dbg_requires')}
                    )
                )
              terminator: <Id.Op_Semi _>
            )
          ]
        )
      action: [
        (command.ShFunction
          name: _Dbg_expand_filename
          body: 
            (BraceGroup
              children: [
                (C {<typeset>} {<-r>} {<Id.Lit_VarLike 'filename='> (DQ ($ Id.VSub_Number '$1'))})
                (C {<typeset>} 
                  {<Id.Lit_VarLike 'basename='> 
                    (DQ 
                      (braced_var_sub
                        token: <Id.VSub_Name filename>
                        suffix_op: 
                          (suffix_op.Unary
                            tok: <Id.VOp1_DPound '##'>
                            arg_word: {<Id.Lit_Other '*'> <Id.Lit_Slash '/'>}
                          )
                      )
                    )
                  }
                )
                (C {<typeset>} {<-x>} 
                  {<Id.Lit_VarLike 'dirname='> 
                    (DQ 
                      (braced_var_sub
                        token: <Id.VSub_Name filename>
                        suffix_op: 
                          (suffix_op.Unary
                            tok: <Id.VOp1_Percent '%'>
                            arg_word: {<Id.Lit_Slash '/'> <Id.Lit_Other '*'>}
                          )
                      )
                    )
                  }
                )
                (command.AndOr
                  ops: [Id.Op_DAmp Id.Op_DAmp]
                  children: [
                    (command.DBracket
                      expr: 
                        (bool_expr.Binary
                          op_id: Id.BoolBinary_GlobDEqual
                          left: {($ Id.VSub_DollarName '$dirname')}
                          right: {($ Id.VSub_DollarName '$basename')}
                        )
                    )
                    (command.DBracket
                      expr: 
                        (bool_expr.Binary
                          op_id: Id.BoolBinary_GlobNEqual
                          left: {($ Id.VSub_DollarName '$filename')}
                          right: {(SQ <'/'>)}
                        )
                    )
                    (command.ShAssignment
                      pairs: [
                        (assign_pair
                          lhs: (sh_lhs_expr.Name name:dirname)
                          op: assign_op.Equal
                          rhs: {(SQ <.>)}
                          spids: [144]
                        )
                      ]
                    )
                  ]
                )
                (command.ShAssignment
                  pairs: [
                    (assign_pair
                      lhs: (sh_lhs_expr.Name name:dirname)
                      op: assign_op.Equal
                      rhs: 
                        {
                          (braced_var_sub
                            token: <Id.VSub_Name dirname>
                            suffix_op: 
                              (suffix_op.Unary
                                tok: <Id.VTest_ColonHyphen ':-'>
                                arg_word: {<Id.Lit_Slash '/'>}
                              )
                          )
                        }
                      spids: [155]
                    )
                  ]
                )
                (command.ShAssignment
                  pairs: [
                    (assign_pair
                      lhs: (sh_lhs_expr.Name name:dirname)
                      op: assign_op.Equal
                      rhs: 
                        {
                          (command_sub
                            left_token: <Id.Left_DollarParen '$('>
                            child: (C {<echo>} {($ Id.VSub_DollarName '$dirname')})
                          )
                        }
                      spids: [168]
                    )
                  ]
                )
                (C {<typeset>} {<long_path>})
                (command.If
                  arms: [
                    (if_arm
                      cond: 
                        (condition.Shell
                          commands: [
                            (command.Sentence
                              child: 
                                (command.ShAssignment
                                  pairs: [
                                    (assign_pair
                                      lhs: (sh_lhs_expr.Name name:long_path)
                                      op: assign_op.Equal
                                      rhs: 
                                        {
                                          (command_sub
                                            left_token: <Id.Left_DollarParen '$('>
                                            child: 
                                              (command.Subshell
                                                child: 
                                                  (command.CommandList
                                                    children: [
                                                      (command.Sentence
                                                        child: 
                                                          (C {<cd>} 
                                                            {(DQ ($ Id.VSub_DollarName '$dirname'))}
                                                          )
                                                        terminator: <Id.Op_Semi _>
                                                      )
                                                      (C {<pwd>})
                                                    ]
                                                  )
                                                redirects: [
                                                  (redir
                                                    op: <Id.Redir_Great '2>'>
                                                    loc: (redir_loc.Fd fd:2)
                                                    arg: {<'/dev/null'>}
                                                  )
                                                ]
                                              )
                                          )
                                        }
                                      spids: [185]
                                    )
                                  ]
                                )
                              terminator: <Id.Op_Semi _>
                            )
                          ]
                        )
                      action: [
                        (command.If
                          arms: [
                            (if_arm
                              cond: 
                                (condition.Shell
                                  commands: [
                                    (command.Sentence
                                      child: 
                                        (command.DBracket
                                          expr: 
                                            (bool_expr.Binary
                                              op_id: Id.BoolBinary_GlobDEqual
                                              left: {(DQ ($ Id.VSub_DollarName '$long_path'))}
                                              right: {(SQ <'/'>)}
                                            )
                                        )
                                      terminator: <Id.Op_Semi _>
                                    )
                                  ]
                                )
                              action: [(C {<echo>} {(DQ <'/'> ($ Id.VSub_DollarName '$basename'))})]
                              spids: [210 228]
                            )
                          ]
                          else_action: [
                            (C {<echo>} 
                              {
                                (DQ ($ Id.VSub_DollarName '$long_path') <'/'> 
                                  ($ Id.VSub_DollarName '$basename')
                                )
                              }
                            )
                          ]
                        )
                        (command.ControlFlow
                          token: <Id.ControlFlow_Return return>
                          arg_word: {<0>}
                        )
                      ]
                      spids: [183 207]
                    )
                  ]
                  else_action: [
                    (C {<echo>} {($ Id.VSub_DollarName '$filename')})
                    (command.ControlFlow
                      token: <Id.ControlFlow_Return return>
                      arg_word: {<1>}
                    )
                  ]
                )
              ]
            )
        )
        (C {<typeset>} {<-A>} {<_Dbg_requires>})
        (command.ShFunction
          name: require
          body: 
            (BraceGroup
              children: [
                (C {<typeset>} {<file>})
                (C {<typeset>} {<expanded_file>})
                (C {<typeset>} {<source_dir>})
                (C {<typeset>} {<orig_dir>})
                (command.ShAssignment
                  pairs: [
                    (assign_pair
                      lhs: (sh_lhs_expr.Name name:orig_dir)
                      op: assign_op.Equal
                      rhs: {(command_sub left_token:<Id.Left_DollarParen '$('> child:(C {<pwd>}))}
                      spids: [313]
                    )
                  ]
                )
                (command.ShAssignment
                  pairs: [
                    (assign_pair
                      lhs: (sh_lhs_expr.Name name:source_dir)
                      op: assign_op.Equal
                      rhs: 
                        {
                          (braced_var_sub
                            token: <Id.VSub_Name BASH_SOURCE>
                            bracket_op: (bracket_op.ArrayIndex expr:{<Id.Lit_Digits 1>})
                            suffix_op: 
                              (suffix_op.Unary
                                tok: <Id.VOp1_Percent '%'>
                                arg_word: {<Id.Lit_Slash '/'> <Id.Lit_Other '*'>}
                              )
                          )
                        }
                      spids: [319]
                    )
                  ]
                )
                (command.If
                  arms: [
                    (if_arm
                      cond: 
                        (condition.Shell
                          commands: [
                            (command.Sentence
                              child: 
                                (command.DBracket
                                  expr: 
                                    (bool_expr.Binary
                                      op_id: Id.BoolBinary_GlobNEqual
                                      left: {($ Id.VSub_DollarName '$source_dir')}
                                      right: 
                                        {
                                          (braced_var_sub
                                            token: <Id.VSub_Name BASH_SOURCE>
                                            bracket_op: 
                                              (bracket_op.ArrayIndex
                                                expr: {<Id.Lit_Digits 1>}
                                              )
                                          )
                                        }
                                    )
                                )
                              terminator: <Id.Op_Semi _>
                            )
                          ]
                        )
                      action: [(C {<builtin>} {<cd>} {($ Id.VSub_DollarName '$source_dir')})]
                      spids: [331 350]
                    )
                  ]
                )
                (command.ForEach
                  iter_name: file
                  iter_words: [{(DQ ($ Id.VSub_At '$@'))}]
                  do_arg_iter: F
                  body: 
                    (command.DoGroup
                      children: [
                        (command.ShAssignment
                          pairs: [
                            (assign_pair
                              lhs: (sh_lhs_expr.Name name:expanded_file)
                              op: assign_op.Equal
                              rhs: 
                                {
                                  (command_sub
                                    left_token: <Id.Left_DollarParen '$('>
                                    child: 
                                      (C {<_Dbg_expand_filename>} {(DQ ($ Id.VSub_DollarName '$file'))})
                                  )
                                }
                              spids: [378]
                            )
                          ]
                        )
                        (command.If
                          arms: [
                            (if_arm
                              cond: 
                                (condition.Shell
                                  commands: [
                                    (command.Sentence
                                      child: 
                                        (command.DBracket
                                          expr: 
                                            (bool_expr.LogicalAnd
                                              left: 
                                                (bool_expr.Unary
                                                  op_id: Id.BoolUnary_z
                                                  child: 
                                                    {
                                                      (braced_var_sub
                                                        token: <Id.VSub_Name _Dbg_requires>
                                                        bracket_op: 
                                                          (bracket_op.ArrayIndex
                                                            expr: {($ Id.VSub_DollarName '$file')}
                                                          )
                                                      )
                                                    }
                                                )
                                              right: 
                                                (bool_expr.Unary
                                                  op_id: Id.BoolUnary_z
                                                  child: 
                                                    {
                                                      (braced_var_sub
                                                        token: <Id.VSub_Name _Dbg_requires>
                                                        bracket_op: 
                                                          (bracket_op.ArrayIndex
                                                            expr: 
                                                              {
                                                                ($ Id.VSub_DollarName 
'$expanded_file'
                                                                )
                                                              }
                                                          )
                                                      )
                                                    }
                                                )
                                            )
                                        )
                                      terminator: <Id.Op_Semi _>
                                    )
                                  ]
                                )
                              action: [
                                (C {<source>} {($ Id.VSub_DollarName '$expanded_file')})
                                (command.ShAssignment
                                  pairs: [
                                    (assign_pair
                                      lhs: 
                                        (sh_lhs_expr.IndexedName
                                          name: _Dbg_requires
                                          index: {($ Id.VSub_DollarName '$file')}
                                        )
                                      op: assign_op.Equal
                                      rhs: {($ Id.VSub_DollarName '$expanded_file')}
                                      spids: [426]
                                    )
                                  ]
                                )
                                (command.ShAssignment
                                  pairs: [
                                    (assign_pair
                                      lhs: 
                                        (sh_lhs_expr.IndexedName
                                          name: _Dbg_requires
                                          index: {($ Id.VSub_DollarName '$expanded_file')}
                                        )
                                      op: assign_op.Equal
                                      rhs: {($ Id.VSub_DollarName '$expanded_file')}
                                      spids: [434]
                                    )
                                  ]
                                )
                              ]
                              spids: [388 418]
                            )
                          ]
                        )
                      ]
                    )
                )
                (command.AndOr
                  ops: [Id.Op_DAmp]
                  children: [
                    (command.DBracket
                      expr: 
                        (bool_expr.Unary
                          op_id: Id.BoolUnary_n
                          child: {($ Id.VSub_DollarName '$orig_dir')}
                        )
                    )
                    (C {<builtin>} {<cd>} {($ Id.VSub_DollarName '$orig_dir')})
                  ]
                )
              ]
            )
        )
      ]
      spids: [48 60]
    )
  ]
)