* Runs svnserve to serve the specified directory as a subversion repository.
*/
protected Proc runSvnServe(File repo) throws Exception {
LocalLauncher launcher = new LocalLauncher(StreamTaskListener.fromStdout());
try {
launcher.launch().cmds("svnserve","--help").start().join();
} catch (IOException e) {
Assert.fail("Failed to launch svnserve. Do you have subversion installed?\n" + e);
}
// If there is an already existing svnserve running on the machine