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annotate src/luan/tools/CmdLine.java @ 86:6db8f286fa6c

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_ENV is per module, not global git-svn-id: https://luan-java.googlecode.com/svn/trunk@87 21e917c8-12df-6dd8-5cb6-c86387c605b9
author fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
date Wed, 27 Feb 2013 08:03:51 +0000
parents 4bf3d0c0b6b9
children 6ca02b188dba
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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38
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parents: 37
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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.Luan;
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7 import luan.LuanState;
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8 import luan.LuanFunction;
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9 import luan.LuanTable;
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10 import luan.LuanException;
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11
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13 public class CmdLine {
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14
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15 public static void main(String[] args) {
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16 LuanState luan = LuanState.newStandard();
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17 LuanTable env;
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18 try {
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19 env = luan.newEnvironment();
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20 } catch(LuanException e) {
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21 System.err.println("command line error: "+e.getMessage());
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22 System.exit(-1);
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23 throw new RuntimeException(); // never
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24 }
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25 boolean interactive = false;
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26 boolean showVersion = false;
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27 int i = 0;
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28 if( args.length == 0 ) {
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29 interactive = true;
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30 showVersion = true;
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31 } else {
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32 while( i < args.length ) {
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33 String arg = args[i];
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34 if( !arg.startsWith("-") || arg.equals("--") )
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35 break;
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36 if( arg.equals("-i") ) {
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37 interactive = true;
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38 } else if( arg.equals("-v") ) {
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39 showVersion = true;
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40 } else if( arg.equals("-e") ) {
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41 if( ++i == args.length )
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42 error("'-e' needs argument");
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43 String cmd = args[i];
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44 try {
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45 LuanFunction fn = BasicLib.load(luan,cmd,"(command line)",env);
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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46 luan.call(fn,null,null);
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47 } catch(LuanException e) {
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48 System.err.println("command line error: "+e.getMessage());
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49 System.exit(-1);
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50 }
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51 } else if( arg.equals("-") ) {
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52 try {
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53 BasicLib.do_file(luan,"stdin",env);
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54 } catch(LuanException e) {
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55 System.err.println(e.getMessage());
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56 System.exit(-1);
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57 }
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58 System.exit(0);
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59 } else {
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60 error("unrecognized option '"+arg+"'");
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61 }
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62 i++;
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63 }
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64 }
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65 if( showVersion )
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66 System.out.println(Luan.version);
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67 if( i < args.length ) {
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68 String file = args[i++];
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69 Object[] varArgs = new Object[args.length-1];
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70 System.arraycopy(args,1,varArgs,0,varArgs.length);
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71 LuanTable argsTable = new LuanTable();
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72 for( int j=0; j<args.length; j++ ) {
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73 argsTable.put( j, args[j] );
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74 }
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75 env.put("arg",argsTable);
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76 try {
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77 LuanFunction fn = BasicLib.load_file(luan,file,env);
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78 luan.call(fn,null,null,varArgs);
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79 } catch(LuanException e) {
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80 // System.err.println("error: "+e.getMessage());
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81 e.printStackTrace();
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82 System.exit(-1);
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83 }
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84 }
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85 if( interactive )
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86 interactive(luan,env);
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87 }
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88
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89 private static void error(String msg) {
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90 System.err.println(msg);
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91 System.err.println("usage: java luan.CmdLine [options] [script [args]]");
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92 System.err.println("Available options are:");
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93 System.err.println(" -e stat execute string 'stat'");
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94 System.err.println(" -i enter interactive mode after executing 'script'");
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95 // System.err.println(" -l name require library 'name'");
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96 System.err.println(" -v show version information");
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97 // System.err.println(" -E ignore environment variables");
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98 System.err.println(" -- stop handling options");
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99 System.err.println(" - stop handling options and execute stdin");
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100 System.exit(-1);
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101 }
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102
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103 static void interactive(LuanState luan,LuanTable env) {
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104 while( true ) {
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105 System.out.print("> ");
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106 String input = new Scanner(System.in).nextLine();
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107 try {
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108 Object[] rtn = luan.eval(input,"stdin",env);
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109 if( rtn.length > 0 )
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110 BasicLib.print(luan,rtn);
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111 } catch(LuanException e) {
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112 System.out.println(e.getMessage());
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113 }
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114 }
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115 }
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116
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117 }