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/*
 * Copyright (C) 2011, Chris Aniszczyk <caniszczyk@gmail.com>
 * and other copyright owners as documented in the project's IP log.
 *
 * This program and the accompanying materials are made available
 * under the terms of the Eclipse Distribution License v1.0 which
 * accompanies this distribution, is reproduced below, and is
 * available at http://www.eclipse.org/org/documents/edl-v10.php
 *
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or
 * without modification, are permitted provided that the following
 * conditions are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 *
 * - Redistributions in binary form must reproduce the above
 *   copyright notice, this list of conditions and the following
 *   disclaimer in the documentation and/or other materials provided
 *   with the distribution.
 *
 * - Neither the name of the Eclipse Foundation, Inc. nor the
 *   names of its contributors may be used to endorse or promote
 *   products derived from this software without specific prior
 *   written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
 * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package org.eclipse.jgit.api;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;

import java.io.File;
import java.io.IOException;
import java.util.Collections;
import java.util.List;

import org.eclipse.jgit.api.ListBranchCommand.ListMode;
import org.eclipse.jgit.api.errors.JGitInternalException;
import org.eclipse.jgit.junit.TestRepository;
import org.eclipse.jgit.lib.ConfigConstants;
import org.eclipse.jgit.lib.Constants;
import org.eclipse.jgit.lib.ObjectId;
import org.eclipse.jgit.lib.Ref;
import org.eclipse.jgit.lib.RefUpdate;
import org.eclipse.jgit.lib.Repository;
import org.eclipse.jgit.lib.RepositoryTestCase;
import org.eclipse.jgit.revwalk.RevBlob;
import org.junit.Test;

public class CloneCommandTest extends RepositoryTestCase {

	private Git git;

	private TestRepository<Repository> tr;

	public void setUp() throws Exception {
		super.setUp();
		tr = new TestRepository<Repository>(db);

		git = new Git(db);
		// commit something
		writeTrashFile("Test.txt", "Hello world");
		git.add().addFilepattern("Test.txt").call();
		git.commit().setMessage("Initial commit").call();

		// create a master branch and switch to it
		git.branchCreate().setName("test").call();
		RefUpdate rup = db.updateRef(Constants.HEAD);
		rup.link("refs/heads/test");

		// commit something on the test branch
		writeTrashFile("Test.txt", "Some change");
		git.add().addFilepattern("Test.txt").call();
		git.commit().setMessage("Second commit").call();
		RevBlob blob = tr.blob("blob-not-in-master-branch");
		git.tag().setName("tag-for-blob").setObjectId(blob).call();
	}

	@Test
	public void testCloneRepository() throws IOException {
		File directory = createTempDirectory("testCloneRepository");
		CloneCommand command = Git.cloneRepository();
		command.setDirectory(directory);
		command.setURI("file://" + git.getRepository().getWorkTree().getPath());
		Git git2 = command.call();
		addRepoToClose(git2.getRepository());
		assertNotNull(git2);
		ObjectId id = git2.getRepository().resolve("tag-for-blob");
		assertNotNull(id);
		assertEquals(git2.getRepository().getFullBranch(), "refs/heads/test");
		assertEquals(
				"origin",
				git2.getRepository()
						.getConfig()
						.getString(ConfigConstants.CONFIG_BRANCH_SECTION,
								"test", ConfigConstants.CONFIG_KEY_REMOTE));
		assertEquals(
				"refs/heads/test",
				git2.getRepository()
						.getConfig()
						.getString(ConfigConstants.CONFIG_BRANCH_SECTION,
								"test", ConfigConstants.CONFIG_KEY_MERGE));
		assertEquals(2, git2.branchList().setListMode(ListMode.REMOTE).call()
				.size());
	}

	@Test
	public void testCloneRepositoryWithBranch() throws IOException {
		File directory = createTempDirectory("testCloneRepositoryWithBranch");
		CloneCommand command = Git.cloneRepository();
		command.setBranch("refs/heads/master");
		command.setDirectory(directory);
		command.setURI("file://" + git.getRepository().getWorkTree().getPath());
		Git git2 = command.call();
		addRepoToClose(git2.getRepository());

		assertNotNull(git2);
		assertEquals(git2.getRepository().getFullBranch(), "refs/heads/master");
		assertEquals(
				"refs/heads/master, refs/remotes/origin/master, refs/remotes/origin/test",
				allRefNames(git2.branchList().setListMode(ListMode.ALL).call()));

		// Same thing, but now without checkout
		directory = createTempDirectory("testCloneRepositoryWithBranch_bare");
		command = Git.cloneRepository();
		command.setBranch("refs/heads/master");
		command.setDirectory(directory);
		command.setURI("file://" + git.getRepository().getWorkTree().getPath());
		command.setNoCheckout(true);
		git2 = command.call();
		addRepoToClose(git2.getRepository());

		assertNotNull(git2);
		assertEquals(git2.getRepository().getFullBranch(), "refs/heads/master");
		assertEquals("refs/remotes/origin/master, refs/remotes/origin/test",
				allRefNames(git2.branchList().setListMode(ListMode.ALL).call()));

		// Same thing, but now test with bare repo
		directory = createTempDirectory("testCloneRepositoryWithBranch_bare");
		command = Git.cloneRepository();
		command.setBranch("refs/heads/master");
		command.setDirectory(directory);
		command.setURI("file://" + git.getRepository().getWorkTree().getPath());
		command.setBare(true);
		git2 = command.call();
		addRepoToClose(git2.getRepository());

		assertNotNull(git2);
		assertEquals(git2.getRepository().getFullBranch(), "refs/heads/master");
		assertEquals("refs/heads/master, refs/heads/test", allRefNames(git2
				.branchList().setListMode(ListMode.ALL).call()));
	}

	@Test
	public void testCloneRepositoryOnlyOneBranch() throws IOException {
		File directory = createTempDirectory("testCloneRepositoryWithBranch");
		CloneCommand command = Git.cloneRepository();
		command.setBranch("refs/heads/master");
		command.setBranchesToClone(Collections
				.singletonList("refs/heads/master"));
		command.setDirectory(directory);
		command.setURI("file://" + git.getRepository().getWorkTree().getPath());
		Git git2 = command.call();
		addRepoToClose(git2.getRepository());
		assertNotNull(git2);
		assertEquals(git2.getRepository().getFullBranch(), "refs/heads/master");
		assertEquals("refs/remotes/origin/master", allRefNames(git2
				.branchList().setListMode(ListMode.REMOTE).call()));

		// Same thing, but now test with bare repo
		directory = createTempDirectory("testCloneRepositoryWithBranch_bare");
		command = Git.cloneRepository();
		command.setBranch("refs/heads/master");
		command.setBranchesToClone(Collections
				.singletonList("refs/heads/master"));
		command.setDirectory(directory);
		command.setURI("file://" + git.getRepository().getWorkTree().getPath());
		command.setBare(true);
		git2 = command.call();
		addRepoToClose(git2.getRepository());
		assertNotNull(git2);
		assertEquals(git2.getRepository().getFullBranch(), "refs/heads/master");
		assertEquals("refs/heads/master", allRefNames(git2.branchList()
				.setListMode(ListMode.ALL).call()));
	}

	public static String allRefNames(List<Ref> refs) {
		StringBuilder sb = new StringBuilder();
		for (Ref f : refs) {
			if (sb.length() > 0)
				sb.append(", ");
			sb.append(f.getName());
		}
		return sb.toString();
	}

	@Test
	public void testCloneRepositoryWhenDestinationDirectoryExistsAndIsNotEmpty()
			throws IOException {
		String dirName = "testCloneTargetDirectoryNotEmpty";
		File directory = createTempDirectory(dirName);
		CloneCommand command = Git.cloneRepository();
		command.setDirectory(directory);
		command.setURI("file://" + git.getRepository().getWorkTree().getPath());
		Git git2 = command.call();
		addRepoToClose(git2.getRepository());
		assertNotNull(git2);
		// clone again
		command = Git.cloneRepository();
		command.setDirectory(directory);
		command.setURI("file://" + git.getRepository().getWorkTree().getPath());
		try {
			git2 = command.call();
			// we shouldn't get here
			fail("destination directory already exists and is not an empty folder, cloning should fail");
		} catch (JGitInternalException e) {
			assertTrue(e.getMessage().contains("not an empty directory"));
			assertTrue(e.getMessage().contains(dirName));
		}
	}
}