JGit Handler

JGitHandler.java

package jgitdemo;

import java.io.File;
import java.io.IOException;
import java.util.Iterator;
import org.eclipse.jgit.api.Git;
import org.eclipse.jgit.api.PushCommand;
import org.eclipse.jgit.api.errors.GitAPIException;
import org.eclipse.jgit.api.errors.InvalidRemoteException;
import org.eclipse.jgit.lib.Ref;
import org.eclipse.jgit.lib.Repository;
import org.eclipse.jgit.revwalk.RevCommit;
import org.eclipse.jgit.revwalk.RevTree;
import org.eclipse.jgit.revwalk.RevWalk;
import org.eclipse.jgit.storage.file.FileRepositoryBuilder;
import org.eclipse.jgit.transport.CredentialsProvider;
import org.eclipse.jgit.transport.PushResult;
import org.eclipse.jgit.treewalk.TreeWalk;

/**
 *
 * @author Shakir
 */
public class JGitHandler
{
	public static void clonePublicRepository(String repoUrI, String folder) throws Exception
	{
		try (Git git = Git.cloneRepository()
				.setURI(repoUrI)
				.setDirectory(new File(folder))
				.call();)
		{
			System.out.println("JGitHandler.clonePublicRepository() - " + git);
		}
	}

	public static void clonePrivateRepository(String repoUrI, String folder, CredentialsProvider credentialsProvider) throws Exception
	{
		try (Git git = Git.cloneRepository()
				.setURI(repoUrI)
				.setDirectory(new File(folder))
				.setCredentialsProvider(credentialsProvider)
				.call();)
		{
			System.out.println("JGitHandler.clonePrivateRepository() - " + git);
		}
	}

	public static Repository getRepositoryFromLocal(String uri) throws IOException
	{
		return new FileRepositoryBuilder()
				.setGitDir(new File(uri))
				.readEnvironment()
				.findGitDir()
				.build();
	}

	public static TreeWalk getTreeWalk(Repository repository) throws Exception
	{
		return getTreeWalk(repository, "HEAD");
	}

	public static TreeWalk getTreeWalk(Repository repository, String ref) throws Exception
	{
		Ref head = repository.findRef(ref);

		// a RevWalk allows to walk over commits based on some filtering that is defined
		RevWalk revWalk = new RevWalk(repository);

		RevCommit revCommit = revWalk.parseCommit(head.getObjectId());
		RevTree revTree = revCommit.getTree();
		System.out.println("Having tree: " + revTree.getName() + "[" + revTree + "]");

		// now use a TreeWalk to iterate over all files in the Tree recursively
		// you can set Filters to narrow down the results if needed
		TreeWalk treeWalk = new TreeWalk(repository);
		treeWalk.addTree(revTree);

		return treeWalk;
	}

	public static void listRepositoryContents(Repository repository) throws Exception
	{
		TreeWalk treeWalk = getTreeWalk(repository);
		treeWalk.setRecursive(true);
		while (treeWalk.next())
		{
			System.out.println("found: " + treeWalk.getPathString() + " " + treeWalk.getFileMode());
//			System.out.printf(
//					"path: %s, Commit(mode/oid): %s/%s, Index(mode/oid): %s/%s, Workingtree(mode/oid): %s/%s\n",
//					treeWalk.getPathString(), treeWalk.getFileMode(0), treeWalk.getObjectId(0), treeWalk.getFileMode(1), treeWalk.getObjectId(1),
//					treeWalk.getFileMode(2), treeWalk.getObjectId(2));
		}
	}

	public static void addFile(Repository repository, CredentialsProvider credentialsProvider, String file) throws Exception
	{
		// Create a Repository object
		try (Git git = new Git(repository);)
		{
			git.add().addFilepattern(file).call();
			doCommit(git);
			doPush(git, credentialsProvider);
		}
	}

	public static void doCommit(Git git) throws GitAPIException
	{
//		RevCommit revCommit = git
//				.doCommit()
//				.setAuthor("Shakir", "shakir@example.com")
//				.setMessage("Auto doCommit from jgit")
//				.call();
		RevCommit revCommit = git.commit().setMessage("Create readme file").call();
		System.out.println("Commit: " + revCommit + ", name: " + revCommit.getName() + ", id: " + revCommit.getId().getName());
	}

	public static void doPush(Git git, CredentialsProvider credentialsProvider) throws GitAPIException
	{
		PushCommand pushCommand = git.push();
		pushCommand.setForce(true);

		if (credentialsProvider != null)
		{
			pushCommand.setCredentialsProvider(credentialsProvider);
		}

		pushCommand.setPushAll();

		try
		{
			Iterator<PushResult> it = pushCommand.call().iterator();
			if (it.hasNext())
			{
				System.out.println(it.next().toString());
			}
		} catch (InvalidRemoteException e)
		{
			e.printStackTrace();
		}
	}

	public static void doPush(Git git) throws GitAPIException
	{
		doPush(git, null);
	}
}