kitaev@213: /*
kitaev@213:  * Copyright (c) 2011 TMate Software Ltd
kitaev@213:  *  
kitaev@213:  * This program is free software; you can redistribute it and/or modify
kitaev@213:  * it under the terms of the GNU General Public License as published by
kitaev@213:  * the Free Software Foundation; version 2 of the License.
kitaev@213:  *
kitaev@213:  * This program is distributed in the hope that it will be useful,
kitaev@213:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
kitaev@213:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
kitaev@213:  * GNU General Public License for more details.
kitaev@213:  *
kitaev@213:  * For information on how to redistribute this software under
kitaev@213:  * the terms of a license other than GNU General Public License
kitaev@213:  * contact TMate Software at support@hg4j.com
kitaev@213:  */
kitaev@213: package org.tmatesoft.hg.test;
kitaev@213: 
kitaev@213: import java.io.File;
kitaev@213: import java.io.IOException;
kitaev@213: import java.io.InputStreamReader;
kitaev@213: import java.nio.CharBuffer;
kitaev@213: import java.util.ArrayList;
kitaev@213: import java.util.Arrays;
kitaev@213: import java.util.LinkedList;
kitaev@213: import java.util.StringTokenizer;
kitaev@213: 
kitaev@213: /**
kitaev@213:  *
kitaev@213:  * @author Artem Tikhomirov
kitaev@213:  * @author TMate Software Ltd.
kitaev@213:  */
kitaev@213: public class ExecHelper {
kitaev@213: 
kitaev@213: 	private final OutputParser parser;
kitaev@213: 	private File dir;
kitaev@213: 	private int exitValue;
kitaev@213: 
kitaev@213: 	public ExecHelper(OutputParser outParser, File workingDir) {
kitaev@213: 		parser = outParser;
kitaev@213: 		dir = workingDir;
kitaev@213: 	}
kitaev@213: 
kitaev@213: 	public void run(String... cmd) throws IOException, InterruptedException {
kitaev@213: 		ProcessBuilder pb = null;
kitaev@213: 		if (System.getProperty("os.name").startsWith("Windows")) {
kitaev@213: 			StringTokenizer st = new StringTokenizer(System.getenv("PATH"), ";");
kitaev@213: 			while (st.hasMoreTokens()) {
kitaev@213: 				File pe = new File(st.nextToken());
kitaev@213: 				if (new File(pe, cmd[0] + ".exe").exists()) {
kitaev@213: 					break;
kitaev@213: 				}
kitaev@213: 				// PATHEXT controls precedence of .exe, .bat and .cmd files, ususlly .exe wins
kitaev@213: 				if (new File(pe, cmd[0] + ".bat").exists() || new File(pe, cmd[0] + ".cmd").exists()) {
kitaev@213: 					ArrayList<String> command = new ArrayList<String>();
kitaev@213: 					command.add("cmd.exe");
kitaev@213: 					command.add("/C");
kitaev@213: 					command.addAll(Arrays.asList(cmd));
kitaev@213: 					pb = new ProcessBuilder(command);
kitaev@213: 					break;
kitaev@213: 				}
kitaev@213: 			}
kitaev@213: 		}
kitaev@213: 		if (pb == null) {
kitaev@213: 			pb = new ProcessBuilder(cmd);
kitaev@213: 		}
kitaev@213: 		Process p = pb.directory(dir).redirectErrorStream(true).start();
kitaev@213: 		InputStreamReader stdOut = new InputStreamReader(p.getInputStream());
kitaev@213: 		LinkedList<CharBuffer> l = new LinkedList<CharBuffer>();
kitaev@213: 		int r = -1;
kitaev@213: 		CharBuffer b = null;
kitaev@213: 		do {
kitaev@213: 			if (b == null || b.remaining() < b.capacity() / 3) {
kitaev@213: 				b = CharBuffer.allocate(512);
kitaev@213: 				l.add(b);
kitaev@213: 			}
kitaev@213: 			r = stdOut.read(b);
kitaev@213: 		} while (r != -1);
kitaev@213: 		int total = 0;
kitaev@213: 		for (CharBuffer cb : l) {
kitaev@213: 			total += cb.position();
kitaev@213: 			cb.flip();
kitaev@213: 		}
kitaev@213: 		CharBuffer res = CharBuffer.allocate(total);
kitaev@213: 		for (CharBuffer cb : l) {
kitaev@213: 			res.put(cb);
kitaev@213: 		}
kitaev@213: 		res.flip();
kitaev@213: 		p.waitFor();
kitaev@213: 		exitValue = p.exitValue();
kitaev@213: 		parser.parse(res);
kitaev@213: 	}
kitaev@213: 	
kitaev@213: 	public int getExitValue() {
kitaev@213: 		return exitValue;
kitaev@213: 	}
kitaev@213: 
kitaev@213: 	public void cwd(File wd) {
kitaev@213: 		dir = wd;
kitaev@213: 	}
kitaev@213: }