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comparison src/luan/CmdLine.java @ 29:9bc66d09ea48

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CmdLine improvements git-svn-id: https://luan-java.googlecode.com/svn/trunk@30 21e917c8-12df-6dd8-5cb6-c86387c605b9
author fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
date Fri, 07 Dec 2012 09:33:31 +0000
parents 409871b33355
children 8d8f4f5caef4
comparison
equal deleted inserted replaced
28:df923e5835b2 29:9bc66d09ea48
1 package luan; 1 package luan;
2 2
3 import java.io.InputStreamReader;
3 import java.util.Arrays; 4 import java.util.Arrays;
4 import java.util.Scanner; 5 import java.util.Scanner;
5 import luan.lib.BasicLib; 6 import luan.lib.BasicLib;
6 7
7 8
8 public class CmdLine { 9 public class CmdLine {
10 static final String version = "Luan 0.0";
9 11
10 public static void main(String[] args) throws Exception { 12 public static void main(String[] args) throws Exception {
11 LuaState lua = new LuaState(); 13 LuaState lua = new LuaState();
12 BasicLib.register(lua); 14 BasicLib.register(lua);
13 boolean interactive = false; 15 boolean interactive = false;
16 boolean showVersion = false;
14 int i = 0; 17 int i = 0;
15 while( i < args.length ) { 18 if( args.length == 0 ) {
16 String arg = args[i]; 19 interactive = true;
17 if( !arg.startsWith("-") ) 20 showVersion = true;
18 break; 21 } else {
19 if( arg.equals("-i") ) { 22 while( i < args.length ) {
20 interactive = true; 23 String arg = args[i++];
21 } else { 24 if( !arg.startsWith("-") || arg.equals("--") )
22 throw new RuntimeException("invalid option: "+arg); 25 break;
26 if( arg.equals("-i") ) {
27 interactive = true;
28 } else if( arg.equals("-v") ) {
29 showVersion = true;
30 } else if( arg.equals("-e") ) {
31 if( i == args.length )
32 error("'-e' needs argument");
33 String cmd = args[i++];
34 try {
35 LuaFunction fn = BasicLib.load(lua,cmd);
36 fn.call(lua);
37 } catch(LuaException e) {
38 System.err.println("command line error: "+e.getMessage());
39 System.exit(-1);
40 }
41 } else if( arg.equals("-") ) {
42 String cmd = BasicLib.readAll(new InputStreamReader(System.in));
43 try {
44 LuaFunction fn = BasicLib.load(lua,cmd);
45 fn.call(lua);
46 } catch(LuaException e) {
47 System.err.println(e.getMessage());
48 System.exit(-1);
49 }
50 System.exit(0);
51 } else {
52 error("unrecognized option '"+arg+"'");
53 }
23 } 54 }
24 i++;
25 } 55 }
26 if( i == args.length ) { 56 if( showVersion )
27 interactive = true; 57 System.out.println(version);
28 } else { 58 if( i < args.length ) {
29 String file = args[i++]; 59 String file = args[i++];
30 Object[] varArgs = new Object[args.length-1]; 60 Object[] varArgs = new Object[args.length-1];
31 System.arraycopy(args,1,varArgs,0,varArgs.length); 61 System.arraycopy(args,1,varArgs,0,varArgs.length);
32 LuaTable argsTable = new LuaTable(); 62 LuaTable argsTable = new LuaTable();
33 for( int j=0; j<args.length; j++ ) { 63 for( int j=0; j<args.length; j++ ) {
34 argsTable.set( new LuaNumber(j), args[j] ); 64 argsTable.set( new LuaNumber(j), args[j] );
35 } 65 }
36 lua.env().set("arg",argsTable); 66 lua.env().set("arg",argsTable);
37 try { 67 try {
38 LuaFunction fn = BasicLib.loadFile(lua,file); 68 LuaFunction fn = BasicLib.loadfile(lua,file);
39 fn.call(lua,varArgs); 69 fn.call(lua,varArgs);
40 } catch(LuaException e) { 70 } catch(LuaException e) {
41 // System.out.println(e.getMessage()); 71 // System.err.println(e.getMessage());
42 e.printStackTrace(); 72 e.printStackTrace();
43 return; 73 System.exit(-1);
44 } 74 }
45 } 75 }
46 if( interactive ) 76 if( interactive )
47 interactive(lua); 77 interactive(lua);
78 }
79
80 private static void error(String msg) {
81 System.err.println(msg);
82 System.err.println("usage: java luan.CmdLine [options] [script [args]]");
83 System.err.println("Available options are:");
84 System.err.println(" -e stat execute string 'stat'");
85 System.err.println(" -i enter interactive mode after executing 'script'");
86 // System.err.println(" -l name require library 'name'");
87 System.err.println(" -v show version information");
88 // System.err.println(" -E ignore environment variables");
89 System.err.println(" -- stop handling options");
90 System.err.println(" - stop handling options and execute stdin");
91 System.exit(-1);
48 } 92 }
49 93
50 static void interactive(LuaState lua) { 94 static void interactive(LuaState lua) {
51 while( true ) { 95 while( true ) {
52 System.out.print("> "); 96 System.out.print("> ");