granicus.if.org Git - icinga2/blob - lib/cli/replcommand.cpp

   1 /******************************************************************************
   2  * Icinga 2                                                                   *
   3  * Copyright (C) 2012-2014 Icinga Development Team (http://www.icinga.org)    *
   4  *                                                                            *
   5  * This program is free software; you can redistribute it and/or              *
   6  * modify it under the terms of the GNU General Public License                *
   7  * as published by the Free Software Foundation; either version 2             *
   8  * of the License, or (at your option) any later version.                     *
   9  *                                                                            *
  10  * This program is distributed in the hope that it will be useful,            *
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of             *
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the              *
  13  * GNU General Public License for more details.                               *
  14  *                                                                            *
  15  * You should have received a copy of the GNU General Public License          *
  16  * along with this program; if not, write to the Free Software Foundation     *
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.             *
  18  ******************************************************************************/
  19
  20 #include "cli/replcommand.hpp"
  21 #include "config/configcompiler.hpp"
  22 #include "config/configcompilercontext.hpp"
  23 #include "base/json.hpp"
  24 #include <iostream>
  25
  26 using namespace icinga;
  27 namespace po = boost::program_options;
  28
  29 REGISTER_CLICOMMAND("repl", ReplCommand);
  30
  31 String ReplCommand::GetDescription(void) const
  32 {
  33         return "Interprets Icinga script expressions.";
  34 }
  35
  36 String ReplCommand::GetShortDescription(void) const
  37 {
  38         return "Icinga REPL console";
  39 }
  40
  41 bool ReplCommand::IsHidden(void) const
  42 {
  43         return true;
  44 }
  45
  46 void ReplCommand::InitParameters(boost::program_options::options_description& visibleDesc,
  47     boost::program_options::options_description& hiddenDesc) const
  48 {
  49 }
  50
  51 /**
  52  * The entry point for the "repl" CLI command.
  53  *
  54  * @returns An exit status.
  55  */
  56 int ReplCommand::Run(const po::variables_map& vm, const std::vector<std::string>& ap) const
  57 {
  58         VMFrame frame;
  59
  60         while (std::cin.good()) {
  61                 std::cout << "=> ";
  62
  63                 std::string line;
  64                 std::getline(std::cin, line);
  65
  66                 Expression *expr;
  67
  68                 try {
  69                         ConfigCompilerContext::GetInstance()->Reset();
  70
  71                         expr = ConfigCompiler::CompileText("<console>", line);
  72
  73                         BOOST_FOREACH(const ConfigCompilerMessage& message, ConfigCompilerContext::GetInstance()->GetMessages()) {
  74                                 std::cout << (message.Error ? "Error" : "Warning") << ": " << message.Text << "\n";
  75                         }
  76
  77                         if (expr) {
  78                                 Value result = expr->Evaluate(frame);
  79                                 if (!result.IsObject() || result.IsObjectType<Array>() || result.IsObjectType<Dictionary>())
  80                                         std::cout << JsonEncode(result) << "\n";
  81                                 else
  82                                         std::cout << result << "\n";
  83                         }
  84                 } catch (const ConfigError& ex) {
  85                         std::cout << ex.what() << "\n";
  86                 } catch (const std::exception& ex) {
  87                         std::cout << "Error: " << DiagnosticInformation(ex) << "\n";
  88                 }
  89
  90                 delete expr;
  91         }
  92 }