(command.CommandList
  children: [
    (command.If
      arms: [
        (if_arm
          cond: 
            (condition.Shell
              commands: [(C {<test>} {($ Id.VSub_Pound '$#')} {<Id.Lit_Equals '='>} {<1>})]
            )
          action: [
            (command.ShAssignment
              pairs: [
                (assign_pair
                  lhs: (sh_lhs_expr.Name name:PROG_DIR)
                  op: assign_op.Equal
                  rhs: {(command_sub left_token:<Id.Left_Backtick '`'> child:(C {<pwd>}))}
                  spids: [27]
                )
              ]
            )
            (command.ShAssignment
              pairs: [
                (assign_pair
                  lhs: (sh_lhs_expr.Name name:TEST_DIR)
                  op: assign_op.Equal
                  rhs: {($ Id.VSub_Number '$1')}
                  spids: [35]
                )
              ]
            )
          ]
          spids: [14 24]
        )
      ]
      else_action: [
        (command.ShAssignment
          pairs: [
            (assign_pair
              lhs: (sh_lhs_expr.Name name:PROG_DIR)
              op: assign_op.Equal
              rhs: {<..>}
              spids: [41]
            )
          ]
        )
        (command.ShAssignment
          pairs: [
            (assign_pair
              lhs: (sh_lhs_expr.Name name:TEST_DIR)
              op: assign_op.Equal
              rhs: {<.>}
              spids: [45]
            )
          ]
        )
      ]
    )
    (command.ShAssignment
      pairs: [
        (assign_pair
          lhs: (sh_lhs_expr.Name name:ifBTYACC)
          op: assign_op.Equal
          rhs: 
            {
              (command_sub
                left_token: <Id.Left_Backtick '`'>
                child: 
                  (command.CommandList
                    children: [
                      (command.Sentence
                        child: 
                          (command.Simple
                            words: [{<fgrep>} {<-l>} {(SQ <'define YYBTYACC'>)} {<config.h>}]
                            redirects: [
                              (redir
                                op: <Id.Redir_Great '>'>
                                loc: (redir_loc.Fd fd:1)
                                arg: {<'/dev/null'>}
                              )
                            ]
                            do_fork: T
                          )
                        terminator: <Id.Op_Semi _>
                      )
                      (command.Sentence
                        child: 
                          (C {<test>} {($ Id.VSub_QMark '$?')} {<Id.KW_Bang '!'> <Id.Lit_Equals '='>} 
                            {<0>}
                          )
                        terminator: <Id.Op_Semi _>
                      )
                      (C {<echo>} {($ Id.VSub_QMark '$?')})
                    ]
                  )
              )
            }
          spids: [51]
        )
      ]
    )
    (command.If
      arms: [
        (if_arm
          cond: 
            (condition.Shell
              commands: [
                (command.Sentence
                  child: (C {<test>} {($ Id.VSub_DollarName '$ifBTYACC')} {<Id.Lit_Equals '='>} {<0>})
                  terminator: <Id.Op_Semi _>
                )
              ]
            )
          action: [
            (command.ShAssignment
              pairs: [
                (assign_pair
                  lhs: (sh_lhs_expr.Name name:REF_DIR)
                  op: assign_op.Equal
                  rhs: {(${ Id.VSub_Name TEST_DIR) <'/yacc'>}
                  spids: [100]
                )
              ]
            )
          ]
          spids: [86 97]
        )
      ]
      else_action: [
        (command.ShAssignment
          pairs: [
            (assign_pair
              lhs: (sh_lhs_expr.Name name:REF_DIR)
              op: assign_op.Equal
              rhs: {(${ Id.VSub_Name TEST_DIR) <'/btyacc'>}
              spids: [109]
            )
          ]
        )
      ]
    )
    (C {<echo>} {(SQ <'** '>) (command_sub left_token:<Id.Left_Backtick '`'> child:(C {<date>}))})
    (command.ForEach
      iter_names: [i]
      iterable: (for_iter.Words words:[{(${ Id.VSub_Name REF_DIR) <'/'> <Id.Lit_Star '*'> <.c>}])
      body: 
        (command.DoGroup
          children: [
            (C {<make>} {<-f>} {($ Id.VSub_DollarName '$PROG_DIR') <'/makefile'>} {<lint>} 
              {<Id.Lit_VarLike 'C_FILES='> ($ Id.VSub_DollarName '$i')} {<Id.Lit_VarLike 'srcdir='> ($ Id.VSub_DollarName '$PROG_DIR')}
            )
          ]
        )
    )
  ]
)