oil AST

(command.CommandList
  children: [
    (command.If
      arms: [
        (if_arm
          cond: [
            (command.Sentence
              child: 
                (command.DBracket
                  expr: 
                    (bool_expr.LogicalNot
                      child: (bool_expr.Unary op_id:BoolUnary_z child:{(DQ ($ VSub_Number '$1'))})
                    )
                )
              terminator: <Op_Semi ';'>
            )
          ]
          action: [
            (command.Assignment
              pairs: [
                (assign_pair
                  lhs: (lhs_expr.LhsName name:CLUSTERNAME)
                  op: Equal
                  rhs: {(DQ ($ VSub_Number '$1'))}
                )
              ]
            )
          ]
        )
      ]
    )
    (command.If
      arms: [
        (if_arm
          cond: [
            (command.Sentence
              child: 
                (command.DBracket
                  expr: 
                    (bool_expr.LogicalNot
                      child: (bool_expr.Unary op_id:BoolUnary_f child:{(DQ (cluster.txt))})
                    )
                )
              terminator: <Op_Semi ';'>
            )
          ]
          action: [
            (C {(DQ ('Error: cluster.txt not found'))})
            (command.ControlFlow token:<ControlFlow_Exit exit>)
          ]
        )
      ]
    )
    (C {(echo)} {(-e)} {(DQ ('<html>'))})
    (C {(echo)} {(-e)} 
      {
        (DQ ('<head>') (Lit_Other '\\') ('n<title>Cluster ') ($ VSub_DollarName '$CLUSTERNAME') 
          (' members</title></head>')
        )
      }
    )
    (C {(echo)} {(-e)} {(DQ ('<body>'))})
    (C {(echo)} {(-e)} 
      {
        (DQ ('<font color=slategray>') (Lit_Other '\\') ('n<h2>Cluster ') 
          ($ VSub_DollarName '$CLUSTERNAME') (' members</h2>') (Lit_Other '\\') ('n</font>')
        )
      }
    )
    (C {(echo)} {(-e)} 
      {
        (DQ ('<table border=') (word_part.EscapedLiteral token:<Lit_EscapedChar '\\"'>) (1) 
          (word_part.EscapedLiteral token:<Lit_EscapedChar '\\"'>) ('>')
        )
      }
    )
    (command.WhileUntil
      keyword: <KW_While while>
      cond: [
        (command.Sentence
          child: (C {(read)} {(HOSTNAME)} {(MACADDR)} {(IPADDR)} {(ILOIPADDR)} {(DOMAIN)} {(ROLE)})
          terminator: <Op_Semi ';'>
        )
      ]
      body: 
        (command.DoGroup
          children: [
            (command.If
              arms: [
                (if_arm
                  cond: [
                    (command.Sentence
                      child: 
                        (command.DBracket
                          expr: 
                            (bool_expr.Binary
                              op_id: BoolBinary_GlobEqual
                              left: {(DQ ($ VSub_DollarName '$ROLE'))}
                              right: {(DQ (head))}
                            )
                        )
                      terminator: <Op_Semi ';'>
                    )
                  ]
                  action: [
                    (command.Assignment
                      pairs: [(assign_pair lhs:(lhs_expr.LhsName name:COLOR) op:Equal rhs:{(red)})]
                    )
                  ]
                )
                (if_arm
                  cond: [
                    (command.Sentence
                      child: 
                        (command.DBracket
                          expr: 
                            (bool_expr.Binary
                              op_id: BoolBinary_GlobEqual
                              left: {(DQ ($ VSub_DollarName '$ROLE'))}
                              right: {(DQ (bootstrap))}
                            )
                        )
                      terminator: <Op_Semi ';'>
                    )
                  ]
                  action: [
                    (command.Assignment
                      pairs: [(assign_pair lhs:(lhs_expr.LhsName name:COLOR) op:Equal rhs:{(purple)})]
                    )
                  ]
                )
              ]
              else_action: [
                (command.Assignment
                  pairs: [(assign_pair lhs:(lhs_expr.LhsName name:COLOR) op:Equal rhs:{(black)})]
                )
              ]
            )
            (C {(echo)} {(-e)} {(DQ ('<tr>'))})
            (C {(echo)} {(-e)} {(DQ ('<td>') ($ VSub_DollarName '$HOSTNAME') ('</td>'))})
            (C {(echo)} {(-e)} 
              {
                (DQ ('<td><a href=') (word_part.EscapedLiteral token:<Lit_EscapedChar '\\"'>) 
                  ('https://') ($ VSub_DollarName '$IPADDR') (word_part.EscapedLiteral token:<Lit_EscapedChar '\\"'>) 
                  ('>host</a></td>')
                )
              }
            )
            (C {(echo)} {(-e)} 
              {
                (DQ ('<td><a href=') (word_part.EscapedLiteral token:<Lit_EscapedChar '\\"'>) 
                  ('https://') ($ VSub_DollarName '$ILOIPADDR') (word_part.EscapedLiteral token:<Lit_EscapedChar '\\"'>) 
                  ('>ilo</a></td>')
                )
              }
            )
            (C {(echo)} {(-e)} {(DQ ('<td>'))})
            (C {(echo)} {(-e)} {(DQ ('<font color=') ($ VSub_DollarName '$COLOR') ('>'))})
            (C {(echo)} {(-e)} {(DQ ($ VSub_DollarName '$ROLE'))})
            (C {(echo)} {(-e)} {(DQ ('</font>'))})
            (C {(echo)} {(-e)} {(DQ ('</td>'))})
            (C {(echo)} {(-e)} {(DQ ('</tr>'))})
          ]
        )
      redirects: [(redir.Redir op:<Redir_Less '<'> fd:16777215 arg_word:{(cluster.txt)})]
    )
    (C {(echo)} {(-e)} {(DQ ('</table>'))})
    (C {(echo)} {(-e)} {(DQ ('</body>'))})
    (C {(echo)} {(-e)} {(DQ ('</html>'))})
  ]
)