Mercurial Hosting > luan
annotate src/luan/tools/CmdLine.java @ 42:786699c78837
implement try-catch
git-svn-id: https://luan-java.googlecode.com/svn/trunk@43 21e917c8-12df-6dd8-5cb6-c86387c605b9
author | fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9> |
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date | Sun, 23 Dec 2012 06:36:56 +0000 |
parents | e3624b7cd603 |
children | 80b67b1a653c |
rev | line source |
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38
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move CmdLine to luan.tools
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1 package luan.tools; |
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2 |
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3 import java.util.Arrays; |
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4 import java.util.Scanner; |
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5 import luan.lib.BasicLib; |
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6 import luan.lib.JavaLib; |
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7 import luan.Lua; |
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8 import luan.LuaState; |
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9 import luan.LuaFunction; |
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10 import luan.LuaTable; |
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11 import luan.LuaNumber; |
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12 import luan.LuaException; |
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13 import luan.interp.LuaCompiler; |
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14 |
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15 |
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16 public class CmdLine { |
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17 |
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18 public static void main(String[] args) { |
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19 LuaState lua = LuaCompiler.newLuaState(); |
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20 BasicLib.register(lua); |
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21 JavaLib.register(lua); |
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22 BasicLib.make_standard(lua); |
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23 boolean interactive = false; |
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24 boolean showVersion = false; |
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25 int i = 0; |
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26 if( args.length == 0 ) { |
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27 interactive = true; |
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28 showVersion = true; |
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29 } else { |
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30 while( i < args.length ) { |
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31 String arg = args[i]; |
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32 if( !arg.startsWith("-") || arg.equals("--") ) |
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33 break; |
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34 if( arg.equals("-i") ) { |
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35 interactive = true; |
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36 } else if( arg.equals("-v") ) { |
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37 showVersion = true; |
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38 } else if( arg.equals("-e") ) { |
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39 if( ++i == args.length ) |
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40 error("'-e' needs argument"); |
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41 String cmd = args[i]; |
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42 try { |
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43 LuaFunction fn = BasicLib.load(lua,cmd,"(command line)"); |
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44 lua.call(fn,null,null); |
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45 } catch(LuaException e) { |
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46 System.err.println("command line error: "+e.getMessage()); |
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47 System.exit(-1); |
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48 } |
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49 } else if( arg.equals("-") ) { |
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50 try { |
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51 BasicLib.do_file(lua,"stdin"); |
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52 } catch(LuaException e) { |
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53 System.err.println(e.getMessage()); |
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54 System.exit(-1); |
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55 } |
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56 System.exit(0); |
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57 } else { |
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58 error("unrecognized option '"+arg+"'"); |
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59 } |
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60 i++; |
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61 } |
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62 } |
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63 if( showVersion ) |
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64 System.out.println(Lua.version); |
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65 if( i < args.length ) { |
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66 String file = args[i++]; |
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67 Object[] varArgs = new Object[args.length-1]; |
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68 System.arraycopy(args,1,varArgs,0,varArgs.length); |
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69 LuaTable argsTable = new LuaTable(); |
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70 for( int j=0; j<args.length; j++ ) { |
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71 argsTable.put( new LuaNumber(j), args[j] ); |
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72 } |
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73 lua.global().put("arg",argsTable); |
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74 try { |
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75 LuaFunction fn = BasicLib.load_file(lua,file); |
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76 lua.call(fn,null,null,varArgs); |
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77 } catch(LuaException e) { |
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78 System.err.println("error: "+e.getMessage()); |
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79 // e.printStackTrace(); |
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80 System.exit(-1); |
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81 } |
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82 } |
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83 if( interactive ) |
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84 interactive(lua); |
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85 } |
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86 |
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87 private static void error(String msg) { |
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88 System.err.println(msg); |
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89 System.err.println("usage: java luan.CmdLine [options] [script [args]]"); |
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90 System.err.println("Available options are:"); |
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91 System.err.println(" -e stat execute string 'stat'"); |
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92 System.err.println(" -i enter interactive mode after executing 'script'"); |
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93 // System.err.println(" -l name require library 'name'"); |
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94 System.err.println(" -v show version information"); |
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95 // System.err.println(" -E ignore environment variables"); |
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96 System.err.println(" -- stop handling options"); |
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97 System.err.println(" - stop handling options and execute stdin"); |
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98 System.exit(-1); |
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99 } |
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100 |
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101 static void interactive(LuaState lua) { |
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102 while( true ) { |
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103 System.out.print("> "); |
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104 String input = new Scanner(System.in).nextLine(); |
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105 try { |
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106 LuaFunction fn = BasicLib.load(lua,input,"stdin"); |
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107 Object[] rtn = lua.call(fn,null,null); |
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108 if( rtn.length > 0 ) |
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109 BasicLib.print(lua,rtn); |
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110 } catch(LuaException e) { |
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111 System.out.println(e.getMessage()); |
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112 } |
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113 } |
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114 } |
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115 } |