--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hg4j/src/test/java/org/tmatesoft/hg/test/ExecHelper.java	Tue May 10 10:52:53 2011 +0200
@@ -0,0 +1,101 @@
+/*
+ * Copyright (c) 2011 TMate Software Ltd
+ *  
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * For information on how to redistribute this software under
+ * the terms of a license other than GNU General Public License
+ * contact TMate Software at support@hg4j.com
+ */
+package org.tmatesoft.hg.test;
+
+import java.io.File;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.nio.CharBuffer;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.LinkedList;
+import java.util.StringTokenizer;
+
+/**
+ *
+ * @author Artem Tikhomirov
+ * @author TMate Software Ltd.
+ */
+public class ExecHelper {
+
+	private final OutputParser parser;
+	private File dir;
+	private int exitValue;
+
+	public ExecHelper(OutputParser outParser, File workingDir) {
+		parser = outParser;
+		dir = workingDir;
+	}
+
+	public void run(String... cmd) throws IOException, InterruptedException {
+		ProcessBuilder pb = null;
+		if (System.getProperty("os.name").startsWith("Windows")) {
+			StringTokenizer st = new StringTokenizer(System.getenv("PATH"), ";");
+			while (st.hasMoreTokens()) {
+				File pe = new File(st.nextToken());
+				if (new File(pe, cmd[0] + ".exe").exists()) {
+					break;
+				}
+				// PATHEXT controls precedence of .exe, .bat and .cmd files, ususlly .exe wins
+				if (new File(pe, cmd[0] + ".bat").exists() || new File(pe, cmd[0] + ".cmd").exists()) {
+					ArrayList<String> command = new ArrayList<String>();
+					command.add("cmd.exe");
+					command.add("/C");
+					command.addAll(Arrays.asList(cmd));
+					pb = new ProcessBuilder(command);
+					break;
+				}
+			}
+		}
+		if (pb == null) {
+			pb = new ProcessBuilder(cmd);
+		}
+		Process p = pb.directory(dir).redirectErrorStream(true).start();
+		InputStreamReader stdOut = new InputStreamReader(p.getInputStream());
+		LinkedList<CharBuffer> l = new LinkedList<CharBuffer>();
+		int r = -1;
+		CharBuffer b = null;
+		do {
+			if (b == null || b.remaining() < b.capacity() / 3) {
+				b = CharBuffer.allocate(512);
+				l.add(b);
+			}
+			r = stdOut.read(b);
+		} while (r != -1);
+		int total = 0;
+		for (CharBuffer cb : l) {
+			total += cb.position();
+			cb.flip();
+		}
+		CharBuffer res = CharBuffer.allocate(total);
+		for (CharBuffer cb : l) {
+			res.put(cb);
+		}
+		res.flip();
+		p.waitFor();
+		exitValue = p.exitValue();
+		parser.parse(res);
+	}
+	
+	public int getExitValue() {
+		return exitValue;
+	}
+
+	public void cwd(File wd) {
+		dir = wd;
+	}
+}