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annotate src/luan/tools/CmdLine.java @ 52:0c0f2b107099

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add WebRun git-svn-id: https://luan-java.googlecode.com/svn/trunk@53 21e917c8-12df-6dd8-5cb6-c86387c605b9
author fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
date Mon, 31 Dec 2012 03:15:20 +0000
parents 8ede219cd111
children 9381b23ea9e1
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rev   line source
38
30fcb4fb0f76 move CmdLine to luan.tools
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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diff changeset
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.lib.StringLib;
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57054fa43189 implement table lib
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8 import luan.lib.TableLib;
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9 import luan.lib.HtmlLib;
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10 import luan.Luan;
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11 import luan.LuanState;
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12 import luan.LuanFunction;
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13 import luan.LuanTable;
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14 import luan.LuanException;
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15 import luan.interp.LuanCompiler;
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18 public class CmdLine {
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19
52
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20 public static LuanState newStandardLuan() {
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21 LuanState luan = LuanCompiler.newLuanState();
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22 BasicLib.register(luan);
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23 JavaLib.register(luan);
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24 StringLib.register(luan);
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25 TableLib.register(luan);
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26 HtmlLib.register(luan);
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27 return luan;
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28 }
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29
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30 public static void main(String[] args) {
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31 LuanState luan = newStandardLuan();
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32 BasicLib.make_standard(luan);
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33 boolean interactive = false;
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34 boolean showVersion = false;
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35 int i = 0;
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36 if( args.length == 0 ) {
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37 interactive = true;
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38 showVersion = true;
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39 } else {
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40 while( i < args.length ) {
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41 String arg = args[i];
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42 if( !arg.startsWith("-") || arg.equals("--") )
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43 break;
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44 if( arg.equals("-i") ) {
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45 interactive = true;
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46 } else if( arg.equals("-v") ) {
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47 showVersion = true;
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48 } else if( arg.equals("-e") ) {
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49 if( ++i == args.length )
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50 error("'-e' needs argument");
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51 String cmd = args[i];
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52 try {
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53 LuanFunction fn = BasicLib.load(luan,cmd,"(command line)");
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54 luan.call(fn,null,null);
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55 } catch(LuanException e) {
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56 System.err.println("command line error: "+e.getMessage());
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57 System.exit(-1);
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58 }
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59 } else if( arg.equals("-") ) {
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60 try {
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61 BasicLib.do_file(luan,"stdin");
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62 } catch(LuanException e) {
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63 System.err.println(e.getMessage());
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64 System.exit(-1);
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65 }
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66 System.exit(0);
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67 } else {
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68 error("unrecognized option '"+arg+"'");
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69 }
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70 i++;
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71 }
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72 }
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73 if( showVersion )
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74 System.out.println(Luan.version);
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75 if( i < args.length ) {
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76 String file = args[i++];
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77 Object[] varArgs = new Object[args.length-1];
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78 System.arraycopy(args,1,varArgs,0,varArgs.length);
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79 LuanTable argsTable = new LuanTable();
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80 for( int j=0; j<args.length; j++ ) {
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81 argsTable.put( j, args[j] );
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82 }
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83 luan.global().put("arg",argsTable);
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84 try {
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85 LuanFunction fn = BasicLib.load_file(luan,file);
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86 luan.call(fn,null,null,varArgs);
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87 } catch(LuanException e) {
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88 // System.err.println("error: "+e.getMessage());
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89 e.printStackTrace();
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90 System.exit(-1);
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91 }
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92 }
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93 if( interactive )
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94 interactive(luan);
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95 }
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96
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97 private static void error(String msg) {
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98 System.err.println(msg);
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99 System.err.println("usage: java luan.CmdLine [options] [script [args]]");
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100 System.err.println("Available options are:");
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101 System.err.println(" -e stat execute string 'stat'");
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102 System.err.println(" -i enter interactive mode after executing 'script'");
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103 // System.err.println(" -l name require library 'name'");
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104 System.err.println(" -v show version information");
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105 // System.err.println(" -E ignore environment variables");
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106 System.err.println(" -- stop handling options");
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107 System.err.println(" - stop handling options and execute stdin");
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108 System.exit(-1);
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109 }
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110
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111 static void interactive(LuanState luan) {
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112 while( true ) {
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113 System.out.print("> ");
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114 String input = new Scanner(System.in).nextLine();
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115 try {
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116 Object[] rtn = eval(luan,input,"stdin");
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117 if( rtn.length > 0 )
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118 BasicLib.print(luan,rtn);
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119 } catch(LuanException e) {
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120 System.out.println(e.getMessage());
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121 }
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122 }
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123 }
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124
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125 public static Object[] eval(LuanState luan,String cmd,String sourceName) throws LuanException {
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126 LuanFunction fn = BasicLib.load(luan,cmd,sourceName);
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127 return luan.call(fn,null,null);
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128 }
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129 }