(command.CommandList
  children: [
    (C {(export)} {(Id.Lit_VarLike 'CURL=') (SQ (Token id:Id.Lit_Chars val:curl span_id:42))})
    (command.If
      arms: [
        (if_arm
          cond: [
            (command.Sentence
              child: 
                (C {(Id.Lit_LBracket '[')} {(-n)} {(DQ ($ Id.VSub_DollarName '$PROXY'))} 
                  {(Id.Lit_RBracket ']')}
                )
              terminator: (Token id:Id.Op_Semi val:';' span_id:56)
            )
          ]
          action: [
            (C {(echo)} {(DQ ('Setting up and testing proxy'))})
            (C {(export)} 
              {(Id.Lit_VarLike 'http_proxy=') (http) (Id.Lit_Other ':') (//) (${ Id.VSub_Name PROXY)}
            )
            (C {(export)} 
              {(Id.Lit_VarLike 'https_proxy=') (https) (Id.Lit_Other ':') (//) (${ Id.VSub_Name PROXY)}
            )
            (C {(export)} {(Id.Lit_VarLike 'GIT_SSL_NO_VERIFY=') (true)})
            (C {(export)} {(Id.Lit_VarLike 'CURL=') (DQ ('curl -k -x http://') (${ Id.VSub_Name PROXY))})
            (command.Simple
              words: [
                {($ Id.VSub_DollarName '$CURL')}
                {(-s)}
                {(--connect-timeout)}
                {(1)}
                {(http) (Id.Lit_Other ':') (//www.ubuntu.com)}
              ]
              redirects: [
                (redir.Redir
                  op: (Token id:Id.Redir_Great val:'>' span_id:134)
                  fd: -1
                  arg_word: {(/dev/null)}
                )
              ]
            )
            (command.If
              arms: [
                (if_arm
                  cond: [
                    (command.Sentence
                      child: 
                        (command.DBracket
                          expr: 
                            (bool_expr.Binary
                              op_id: Id.BoolBinary_GlobNEqual
                              left: {($ Id.VSub_QMark '$?')}
                              right: {(0)}
                            )
                        )
                      terminator: (Token id:Id.Op_Semi val:';' span_id:150)
                    )
                  ]
                  action: [
                    (C {(echo)} 
                      {(DQ ('Error: proxy ') ($ Id.VSub_DollarName '$PROXY') (' not responding'))}
                    )
                    (command.ControlFlow
                      token: (Token id:Id.ControlFlow_Exit val:exit span_id:164)
                      arg_word: {(1)}
                    )
                  ]
                  spids: [139 152]
                )
              ]
              else_action: [(C {(echo)} {(DQ ('Using a proxy at ') ($ Id.VSub_DollarName '$PROXY'))})]
            )
          ]
          spids: [45 58]
        )
      ]
      else_action: [
        (C {(echo)} 
          {
            (DQ (word_part.EscapedLiteral token:(Token id:Id.Lit_EscapedChar val:'\\$' span_id:188)) 
              ('PROXY not defined, not defining ') (word_part.EscapedLiteral token:(Token id:Id.Lit_EscapedChar val:'\\$' span_id:190)) 
              ('http_proxy and ') (word_part.EscapedLiteral token:(Token id:Id.Lit_EscapedChar val:'\\$' span_id:192)) (https_proxy)
            )
          }
        )
      ]
    )
  ]
)