Merge changes I2515a6ed,Ib6b24035

* changes:
  Fix ArrayIndexOutOfBoundsException in CreateBranchCommand
  Add methods to Repository to handle remote names

org.eclipse.jgit.test/tst/org/eclipse/jgit/lib/RefTest.java

@@ -58,9 +58,11 @@
 import java.io.FileOutputStream;
 import java.io.IOException;
 import java.util.Map;
+import java.util.TreeSet;
 
 import org.eclipse.jgit.lib.Ref.Storage;
 import org.eclipse.jgit.lib.RefUpdate.Result;
+import org.eclipse.jgit.storage.file.FileBasedConfig;
 import org.eclipse.jgit.test.resources.SampleDataRepositoryTestCase;
 import org.junit.Test;
 
@@ -82,6 +84,50 @@ private void writeSymref(String src, String dst) throws IOException {
 		}
 	}
 
+	@Test
+	public void testRemoteNames() throws Exception {
+		FileBasedConfig config = db.getConfig();
+		config.setBoolean(ConfigConstants.CONFIG_REMOTE_SECTION,
+				"origin", "dummy", true);
+		config.setBoolean(ConfigConstants.CONFIG_REMOTE_SECTION,
+				"ab/c", "dummy", true);
+		config.save();
+		assertEquals("[ab/c, origin]",
+				new TreeSet<String>(db.getRemoteNames()).toString());
+
+		// one-level deep remote branch
+		assertEquals("master",
+				db.shortenRemoteBranchName("refs/remotes/origin/master"));
+		assertEquals("origin", db.getRemoteName("refs/remotes/origin/master"));
+
+		// two-level deep remote branch
+		assertEquals("masta/r",
+				db.shortenRemoteBranchName("refs/remotes/origin/masta/r"));
+		assertEquals("origin", db.getRemoteName("refs/remotes/origin/masta/r"));
+
+		// Remote with slash and one-level deep branch name
+		assertEquals("xmaster",
+				db.shortenRemoteBranchName("refs/remotes/ab/c/xmaster"));
+		assertEquals("ab/c", db.getRemoteName("refs/remotes/ab/c/xmaster"));
+
+		// Remote with slash and two-level deep branch name
+		assertEquals("xmasta/r",
+				db.shortenRemoteBranchName("refs/remotes/ab/c/xmasta/r"));
+		assertEquals("ab/c", db.getRemoteName("refs/remotes/ab/c/xmasta/r"));
+
+		// no such remote
+		assertNull(db.getRemoteName("refs/remotes/nosuchremote/x"));
+		assertNull(db.shortenRemoteBranchName("refs/remotes/nosuchremote/x"));
+
+		// no such remote too, no branch name either
+		assertNull(db.getRemoteName("refs/remotes/abranch"));
+		assertNull(db.shortenRemoteBranchName("refs/remotes/abranch"));
+
+		// // local branch
+		assertNull(db.getRemoteName("refs/heads/abranch"));
+		assertNull(db.shortenRemoteBranchName("refs/heads/abranch"));
+	}
+
 	@Test
 	public void testReadAllIncludingSymrefs() throws Exception {
 		ObjectId masterId = db.resolve("refs/heads/master");

org.eclipse.jgit/src/org/eclipse/jgit/api/CreateBranchCommand.java

@@ -246,12 +246,11 @@ else if (upstreamMode == SetupUpstreamMode.NOTRACK)
 
 			if (doConfigure) {
 				StoredConfig config = repo.getConfig();
-				String[] tokens = baseBranch.split("/", 4); //$NON-NLS-1$
-				boolean isRemote = tokens[1].equals("remotes"); //$NON-NLS-1$
-				if (isRemote) {
-					// refs/remotes/<remote name>/<branch>
-					String remoteName = tokens[2];
-					String branchName = tokens[3];
+
+				String remoteName = repo.getRemoteName(baseBranch);
+				if (remoteName != null) {
+					String branchName = repo
+							.shortenRemoteBranchName(baseBranch);
 					config
 							.setString(ConfigConstants.CONFIG_BRANCH_SECTION,
 									name, ConfigConstants.CONFIG_KEY_REMOTE,

org.eclipse.jgit/src/org/eclipse/jgit/lib/Repository.java

@@ -1274,6 +1274,40 @@ public static String shortenRefName(String refName) {
 		return refName;
 	}
 
+	/**
+	 * @param refName
+	 * @return the remote branch name part of <code>refName</code>, i.e. without
+	 *         the <code>refs/remotes/&lt;remote&gt;</code> prefix, if
+	 *         <code>refName</code> represents a remote tracking branch;
+	 *         otherwise null.
+	 * @since 3.4
+	 */
+	public String shortenRemoteBranchName(String refName) {
+		for (String remote : getRemoteNames()) {
+			String remotePrefix = Constants.R_REMOTES + remote + "/"; //$NON-NLS-1$
+			if (refName.startsWith(remotePrefix))
+				return refName.substring(remotePrefix.length());
+		}
+		return null;
+	}
+
+	/**
+	 * @param refName
+	 * @return the remote name part of <code>refName</code>, i.e. without the
+	 *         <code>refs/remotes/&lt;remote&gt;</code> prefix, if
+	 *         <code>refName</code> represents a remote tracking branch;
+	 *         otherwise null.
+	 * @since 3.4
+	 */
+	public String getRemoteName(String refName) {
+		for (String remote : getRemoteNames()) {
+			String remotePrefix = Constants.R_REMOTES + remote + "/"; //$NON-NLS-1$
+			if (refName.startsWith(remotePrefix))
+				return remote;
+		}
+		return null;
+	}
+
 	/**
 	 * @param refName
 	 * @return a {@link ReflogReader} for the supplied refname, or null if the
@@ -1613,4 +1647,13 @@ public void writeRebaseTodoFile(String path, List<RebaseTodoLine> steps,
 			throws IOException {
 		new RebaseTodoFile(this).writeRebaseTodoFile(path, steps, append);
 	}
+
+	/**
+	 * @return the names of all known remotes
+	 * @since 3.4
+	 */
+	public Set<String> getRemoteNames() {
+		return getConfig()
+				.getSubsections(ConfigConstants.CONFIG_REMOTE_SECTION);
+	}
 }