Method: Morpheus::Cli::CliRegistry.exec_expression

Defined in:
lib/morpheus/cli/cli_registry.rb

.exec_expression(input) ⇒ Object 



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# File 'lib/morpheus/cli/cli_registry.rb', line 103

def exec_expression(input)
  # puts "exec_expression(#{input})"
  flow = input
  if input.is_a?(String)
    begin
      flow = Morpheus::Cli::ExpressionParser.parse(input)
    rescue Morpheus::Cli::ExpressionParser::InvalidExpression => e
      raise e
    end
  end
  # puts "executing flow: #{flow.inspect}"
  final_command_result = nil
  if flow.size == 0
    # no input eh?
  else
    last_command_result = nil
    if ['&&','||', '|'].include?(flow.first)
      raise Morpheus::Cli::ExpressionParser::InvalidExpression.new "#{Morpheus::Terminal.angry_prompt}invalid command format, begins with an operator: #{input}"
    elsif ['&&','||', '|'].include?(flow.last)
      raise Morpheus::Cli::ExpressionParser::InvalidExpression.new "#{Morpheus::Terminal.angry_prompt}invalid command format, ends with an operator: #{input}"
    # elsif ['&&','||', '|'].include?(flow.last)
    #   raise Morpheus::Cli::ExpressionParser::InvalidExpression.new "invalid command format, consecutive operators: #{cmd}"
    else
      #Morpheus::Logging::DarkPrinter.puts "Executing command flow: #{flow.inspect}" if Morpheus::Logging.debug?
      previous_command = nil
      previous_command_result = nil
      current_operator = nil
      still_executing = true
      flow.each do |flow_cmd|
        if still_executing
          if flow_cmd == '&&'
            # AND operator
            current_operator = flow_cmd
            exit_code, cmd_err = parse_command_result(previous_command_result)
            if exit_code != 0
              still_executing = false
            end
          elsif flow_cmd == '||' # or with previous command
            current_operator = flow_cmd
            exit_code, err = parse_command_result(previous_command_result)
            if exit_code == 0
              still_executing = false
            end
          elsif flow_cmd == '|' # or with previous command
            raise Morpheus::Cli::ExpressionParser::InvalidExpression.new "The PIPE (|) operator is not yet supported =["
            previous_command_result = nil
            still_executing = false
            # or just continue?
          elsif flow_cmd.is_a?(Array)
            # this is a subexpression, execute it as such
            current_operator = nil
            previous_command_result = exec_expression(flow_cmd)
          else # it's a command, not an operator
            current_operator = nil
            flow_argv = Shellwords.shellsplit(flow_cmd)
            previous_command_result = exec_command(flow_argv[0], flow_argv[1..-1])
          end
          previous_command = flow_cmd
        else
          #Morpheus::Logging::DarkPrinter.puts "operator skipped command: #{flow_cmd}" if Morpheus::Logging.debug?
        end
        # previous_command = flow_cmd
      end
      final_command_result = previous_command_result
    end
  end
  return final_command_result
end