Mercurial Hosting > luan
view src/luan/tools/CmdLine.java @ 88:6ca02b188dba
add LuanBit to clean up code;
add repr();
git-svn-id: https://luan-java.googlecode.com/svn/trunk@89 21e917c8-12df-6dd8-5cb6-c86387c605b9
author | fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9> |
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date | Wed, 27 Feb 2013 23:50:32 +0000 |
parents | 6db8f286fa6c |
children | 754e6030c029 |
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package luan.tools; import java.util.Arrays; import java.util.Scanner; import luan.lib.BasicLib; import luan.Luan; import luan.LuanState; import luan.LuanFunction; import luan.LuanTable; import luan.LuanException; public class CmdLine { public static void main(String[] args) { LuanState luan = LuanState.newStandard(); LuanTable env; try { env = luan.newEnvironment(); } catch(LuanException e) { System.err.println("command line error: "+e.getMessage()); System.exit(-1); throw new RuntimeException(); // never } boolean interactive = false; boolean showVersion = false; int i = 0; if( args.length == 0 ) { interactive = true; showVersion = true; } else { while( i < args.length ) { String arg = args[i]; if( !arg.startsWith("-") || arg.equals("--") ) break; if( arg.equals("-i") ) { interactive = true; } else if( arg.equals("-v") ) { showVersion = true; } else if( arg.equals("-e") ) { if( ++i == args.length ) error("'-e' needs argument"); String cmd = args[i]; try { LuanFunction fn = BasicLib.load(luan,cmd,"(command line)",env); luan.JAVA.call(fn,null); } catch(LuanException e) { System.err.println("command line error: "+e.getMessage()); System.exit(-1); } } else if( arg.equals("-") ) { try { BasicLib.do_file(luan,"stdin",env); } catch(LuanException e) { System.err.println(e.getMessage()); System.exit(-1); } System.exit(0); } else { error("unrecognized option '"+arg+"'"); } i++; } } if( showVersion ) System.out.println(Luan.version); if( i < args.length ) { String file = args[i++]; Object[] varArgs = new Object[args.length-1]; System.arraycopy(args,1,varArgs,0,varArgs.length); LuanTable argsTable = new LuanTable(); for( int j=0; j<args.length; j++ ) { argsTable.put( j, args[j] ); } env.put("arg",argsTable); try { LuanFunction fn = BasicLib.load_file(luan,file,env); luan.JAVA.call(fn,null,varArgs); } catch(LuanException e) { // System.err.println("error: "+e.getMessage()); e.printStackTrace(); System.exit(-1); } } if( interactive ) interactive(luan,env); } private static void error(String msg) { System.err.println(msg); System.err.println("usage: java luan.CmdLine [options] [script [args]]"); System.err.println("Available options are:"); System.err.println(" -e stat execute string 'stat'"); System.err.println(" -i enter interactive mode after executing 'script'"); // System.err.println(" -l name require library 'name'"); System.err.println(" -v show version information"); // System.err.println(" -E ignore environment variables"); System.err.println(" -- stop handling options"); System.err.println(" - stop handling options and execute stdin"); System.exit(-1); } static void interactive(LuanState luan,LuanTable env) { while( true ) { System.out.print("> "); String input = new Scanner(System.in).nextLine(); try { Object[] rtn = luan.eval(input,"stdin",env); if( rtn.length > 0 ) BasicLib.print(luan,rtn); } catch(LuanException e) { System.out.println(e.getMessage()); } } } }