| // Copyright 2008 Google Inc. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| package com.google.gerrit.git; |
| |
| import org.spearce.jgit.lib.Repository; |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.util.Random; |
| |
| public class GitMetaUtil { |
| private static final int SLEEP_MIN = 100; // milliseconds |
| private static final int SLEEP_MAX = 2 * 60 * 1000; // milliseconds |
| private static final ThreadLocal<Random> SLEEP_RNG = |
| new ThreadLocal<Random>() { |
| @Override |
| protected Random initialValue() { |
| return new Random(); |
| } |
| }; |
| |
| private static int waitTime() { |
| return SLEEP_MIN + SLEEP_RNG.get().nextInt(SLEEP_MAX - SLEEP_MIN); |
| } |
| |
| public static void randomSleep() { |
| try { |
| Thread.sleep(waitTime()); |
| } catch (InterruptedException ie) { |
| // Just let the thread continue anyway. |
| } |
| } |
| |
| public static boolean isGitRepository(final File gitdir) { |
| return new File(gitdir, "config").isFile() |
| && new File(gitdir, "HEAD").isFile() |
| && new File(gitdir, "objects").isDirectory() |
| && new File(gitdir, "refs/heads").isDirectory(); |
| } |
| |
| public static Repository open(final File gitdir) throws IOException { |
| if (isGitRepository(gitdir)) { |
| return new Repository(gitdir); |
| } |
| |
| if (isGitRepository(new File(gitdir, ".git"))) { |
| return new Repository(new File(gitdir, ".git")); |
| } |
| |
| final String name = gitdir.getName(); |
| final File parent = gitdir.getParentFile(); |
| if (isGitRepository(new File(parent, name + ".git"))) { |
| return new Repository(new File(parent, name + ".git")); |
| } |
| |
| return null; |
| } |
| } |