org.eclipse.jgit.pgm/src/org/eclipse/jgit/pgm/Branch.java - jgit - Git at Google

 /*
  * Copyright (C) 2007-2008, Charles O'Farrell <charleso@charleso.org>
  * 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.pgm;

 import java.io.IOException;
 import java.text.MessageFormat;
 import java.util.Collection;
 import java.util.LinkedHashMap;
 import java.util.List;
 import java.util.Map;
 import java.util.Map.Entry;

 import org.eclipse.jgit.api.Git;
 import org.eclipse.jgit.api.ListBranchCommand;
 import org.eclipse.jgit.api.ListBranchCommand.ListMode;
 import org.eclipse.jgit.lib.Constants;
 import org.eclipse.jgit.lib.ObjectId;
 import org.eclipse.jgit.lib.ObjectReader;
 import org.eclipse.jgit.lib.Ref;
 import org.eclipse.jgit.lib.RefComparator;
 import org.eclipse.jgit.lib.RefRename;
 import org.eclipse.jgit.lib.RefUpdate;
 import org.eclipse.jgit.lib.RefUpdate.Result;
 import org.eclipse.jgit.lib.Repository;
 import org.eclipse.jgit.pgm.internal.CLIText;
 import org.eclipse.jgit.pgm.opt.OptionWithValuesListHandler;
 import org.eclipse.jgit.revwalk.RevWalk;
 import org.kohsuke.args4j.Argument;
 import org.kohsuke.args4j.Option;

 @Command(common = true, usage = "usage_listCreateOrDeleteBranches")
 class Branch extends TextBuiltin {

 	private String otherBranch;
 	private boolean createForce;
 	private boolean rename;

 	@Option(name = "--remote", aliases = { "-r" }, usage = "usage_actOnRemoteTrackingBranches")
 	private boolean remote = false;

 	@Option(name = "--all", aliases = { "-a" }, usage = "usage_listBothRemoteTrackingAndLocalBranches")
 	private boolean all = false;

 	@Option(name = "--contains", metaVar = "metaVar_commitish", usage = "usage_printOnlyBranchesThatContainTheCommit")
 	private String containsCommitish;

 	private List<String> delete;

 	/**
 	 * Delete branches
 	 *
 	 * @param names
 	 *            a {@link java.util.List} of branch names.
 	 */
 	@Option(name = "--delete", aliases = {
 			"-d" }, metaVar = "metaVar_branchNames", usage = "usage_deleteFullyMergedBranch", handler = OptionWithValuesListHandler.class)
 	public void delete(List<String> names) {
 		if (names.isEmpty()) {
 			throw die(CLIText.get().branchNameRequired);
 		}
 		delete = names;
 	}

 	private List<String> deleteForce;

 	/**
 	 * Forcefully delete branches
 	 *
 	 * @param names
 	 *            a {@link java.util.List} of branch names.
 	 */
 	@Option(name = "--delete-force", aliases = {
 			"-D" }, metaVar = "metaVar_branchNames", usage = "usage_deleteBranchEvenIfNotMerged", handler = OptionWithValuesListHandler.class)
 	public void deleteForce(List<String> names) {
 		if (names.isEmpty()) {
 			throw die(CLIText.get().branchNameRequired);
 		}
 		deleteForce = names;
 	}

 	/**
 	 * Forcefully create a list of branches
 	 *
 	 * @param branchAndStartPoint
 	 *            a branch name and a start point
 	 */
 	@Option(name = "--create-force", aliases = {
 			"-f" }, metaVar = "metaVar_branchAndStartPoint", usage = "usage_forceCreateBranchEvenExists", handler = OptionWithValuesListHandler.class)
 	public void createForce(List<String> branchAndStartPoint) {
 		createForce = true;
 		if (branchAndStartPoint.isEmpty()) {
 			throw die(CLIText.get().branchNameRequired);
 		}
 		if (branchAndStartPoint.size() > 2) {
 			throw die(CLIText.get().tooManyRefsGiven);
 		}
 		if (branchAndStartPoint.size() == 1) {
 			branch = branchAndStartPoint.get(0);
 		} else {
 			branch = branchAndStartPoint.get(0);
 			otherBranch = branchAndStartPoint.get(1);
 		}
 	}

 	/**
 	 * Move or rename a branch
 	 *
 	 * @param currentAndNew
 	 *            the current and the new branch name
 	 */
 	@Option(name = "--move", aliases = {
 			"-m" }, metaVar = "metaVar_oldNewBranchNames", usage = "usage_moveRenameABranch", handler = OptionWithValuesListHandler.class)
 	public void moveRename(List<String> currentAndNew) {
 		rename = true;
 		if (currentAndNew.isEmpty()) {
 			throw die(CLIText.get().branchNameRequired);
 		}
 		if (currentAndNew.size() > 2) {
 			throw die(CLIText.get().tooManyRefsGiven);
 		}
 		if (currentAndNew.size() == 1) {
 			branch = currentAndNew.get(0);
 		} else {
 			branch = currentAndNew.get(0);
 			otherBranch = currentAndNew.get(1);
 		}
 	}

 	@Option(name = "--verbose", aliases = { "-v" }, usage = "usage_beVerbose")
 	private boolean verbose = false;

 	@Argument(metaVar = "metaVar_name")
 	private String branch;

 	private final Map<String, Ref> printRefs = new LinkedHashMap<>();

 	/** Only set for verbose branch listing at-the-moment */
 	private RevWalk rw;

 	private int maxNameLength;

 	/** {@inheritDoc} */
 	@Override
 	protected void run() throws Exception {
 		if (delete != null || deleteForce != null) {
 			if (delete != null) {
 				delete(delete, false);
 			}
 			if (deleteForce != null) {
 				delete(deleteForce, true);
 			}
 		} else {
 			if (rename) {
 				String src, dst;
 				if (otherBranch == null) {
 					final Ref head = db.exactRef(Constants.HEAD);
 					if (head != null && head.isSymbolic()) {
 						src = head.getLeaf().getName();
 					} else {
 						throw die(CLIText.get().cannotRenameDetachedHEAD);
 					}
 					dst = branch;
 				} else {
 					src = branch;
 					final Ref old = db.findRef(src);
 					if (old == null)
 						throw die(MessageFormat.format(CLIText.get().doesNotExist, src));
 					if (!old.getName().startsWith(Constants.R_HEADS))
 						throw die(MessageFormat.format(CLIText.get().notABranch, src));
 					src = old.getName();
 					dst = otherBranch;
 				}

 				if (!dst.startsWith(Constants.R_HEADS))
 					dst = Constants.R_HEADS + dst;
 				if (!Repository.isValidRefName(dst))
 					throw die(MessageFormat.format(CLIText.get().notAValidRefName, dst));

 				RefRename r = db.renameRef(src, dst);
 				if (r.rename() != Result.RENAMED)
 					throw die(MessageFormat.format(CLIText.get().cannotBeRenamed, src));

 			} else if (createForce || branch != null) {
 				String newHead = branch;
 				String startBranch;
 				if (createForce) {
 					startBranch = otherBranch;
 				} else {
 					startBranch = Constants.HEAD;
 				}
 				Ref startRef = db.findRef(startBranch);
 				ObjectId startAt = db.resolve(startBranch + "^0"); //$NON-NLS-1$
 				if (startRef != null) {
 					startBranch = startRef.getName();
 				} else if (startAt != null) {
 					startBranch = startAt.name();
 				} else {
 					throw die(MessageFormat.format(
 							CLIText.get().notAValidCommitName, startBranch));
 				}
 				startBranch = Repository.shortenRefName(startBranch);
 				String newRefName = newHead;
 				if (!newRefName.startsWith(Constants.R_HEADS)) {
 					newRefName = Constants.R_HEADS + newRefName;
 				}
 				if (!Repository.isValidRefName(newRefName)) {
 					throw die(MessageFormat.format(CLIText.get().notAValidRefName, newRefName));
 				}
 				if (!createForce && db.resolve(newRefName) != null) {
 					throw die(MessageFormat.format(CLIText.get().branchAlreadyExists, newHead));
 				}
 				RefUpdate updateRef = db.updateRef(newRefName);
 				updateRef.setNewObjectId(startAt);
 				updateRef.setForceUpdate(createForce);
 				updateRef.setRefLogMessage(MessageFormat.format(CLIText.get().branchCreatedFrom, startBranch), false);
 				Result update = updateRef.update();
 				if (update == Result.REJECTED) {
 					throw die(MessageFormat.format(CLIText.get().couldNotCreateBranch, newHead, update.toString()));
 				}
 			} else {
 				if (verbose) {
 					rw = new RevWalk(db);
 				}
 				list();
 			}
 		}
 	}

 	private void list() throws Exception {
 		Ref head = db.exactRef(Constants.HEAD);
 		// This can happen if HEAD is stillborn
 		if (head != null) {
 			String current = head.getLeaf().getName();
 			try (Git git = new Git(db)) {
 				ListBranchCommand command = git.branchList();
 				if (all)
 					command.setListMode(ListMode.ALL);
 				else if (remote)
 					command.setListMode(ListMode.REMOTE);

 				if (containsCommitish != null)
 					command.setContains(containsCommitish);

 				List<Ref> refs = command.call();
 				for (Ref ref : refs) {
 					if (ref.getName().equals(Constants.HEAD))
 						addRef("(no branch)", head); //$NON-NLS-1$
 				}

 				addRefs(refs, Constants.R_HEADS);
 				addRefs(refs, Constants.R_REMOTES);

 				try (ObjectReader reader = db.newObjectReader()) {
 					for (Entry<String, Ref> e : printRefs.entrySet()) {
 						final Ref ref = e.getValue();
 						printHead(reader, e.getKey(),
 								current.equals(ref.getName()), ref);
 					}
 				}
 			}
 		}
 	}

 	private void addRefs(Collection<Ref> refs, String prefix) {
 		for (Ref ref : RefComparator.sort(refs)) {
 			final String name = ref.getName();
 			if (name.startsWith(prefix))
 				addRef(name.substring(name.indexOf('/', 5) + 1), ref);
 		}
 	}

 	private void addRef(String name, Ref ref) {
 		printRefs.put(name, ref);
 		maxNameLength = Math.max(maxNameLength, name.length());
 	}

 	private void printHead(final ObjectReader reader, final String ref,
 			final boolean isCurrent, final Ref refObj) throws Exception {
 		outw.print(isCurrent ? '*' : ' ');
 		outw.print(' ');
 		outw.print(ref);
 		if (verbose) {
 			final int spaces = maxNameLength - ref.length() + 1;
 			outw.format("%" + spaces + "s", ""); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
 			final ObjectId objectId = refObj.getObjectId();
 			outw.print(reader.abbreviate(objectId).name());
 			outw.print(' ');
 			outw.print(rw.parseCommit(objectId).getShortMessage());
 		}
 		outw.println();
 	}

 	private void delete(List<String> branches, boolean force)
 			throws IOException {
 		String current = db.getBranch();
 		ObjectId head = db.resolve(Constants.HEAD);
 		for (String b : branches) {
 			if (b.equals(current)) {
 				throw die(MessageFormat.format(CLIText.get().cannotDeleteTheBranchWhichYouAreCurrentlyOn, b));
 			}
 			RefUpdate update = db.updateRef((remote ? Constants.R_REMOTES
 					: Constants.R_HEADS)
 					+ b);
 			update.setNewObjectId(head);
 			update.setForceUpdate(force || remote);
 			Result result = update.delete();
 			if (result == Result.REJECTED) {
 				throw die(MessageFormat.format(CLIText.get().branchIsNotAnAncestorOfYourCurrentHEAD, b));
 			} else if (result == Result.NEW)
 				throw die(MessageFormat.format(CLIText.get().branchNotFound, b));
 			if (remote)
 				outw.println(MessageFormat.format(CLIText.get().deletedRemoteBranch, b));
 			else if (verbose)
 				outw.println(MessageFormat.format(CLIText.get().deletedBranch, b));
 		}
 	}
 }
	/*
	* Copyright (C) 2007-2008, Charles O'Farrell <charleso@charleso.org>
	* 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.pgm;

	import java.io.IOException;
	import java.text.MessageFormat;
	import java.util.Collection;
	import java.util.LinkedHashMap;
	import java.util.List;
	import java.util.Map;
	import java.util.Map.Entry;

	import org.eclipse.jgit.api.Git;
	import org.eclipse.jgit.api.ListBranchCommand;
	import org.eclipse.jgit.api.ListBranchCommand.ListMode;
	import org.eclipse.jgit.lib.Constants;
	import org.eclipse.jgit.lib.ObjectId;
	import org.eclipse.jgit.lib.ObjectReader;
	import org.eclipse.jgit.lib.Ref;
	import org.eclipse.jgit.lib.RefComparator;
	import org.eclipse.jgit.lib.RefRename;
	import org.eclipse.jgit.lib.RefUpdate;
	import org.eclipse.jgit.lib.RefUpdate.Result;
	import org.eclipse.jgit.lib.Repository;
	import org.eclipse.jgit.pgm.internal.CLIText;
	import org.eclipse.jgit.pgm.opt.OptionWithValuesListHandler;
	import org.eclipse.jgit.revwalk.RevWalk;
	import org.kohsuke.args4j.Argument;
	import org.kohsuke.args4j.Option;

	@Command(common = true, usage = "usage_listCreateOrDeleteBranches")
	class Branch extends TextBuiltin {

	private String otherBranch;
	private boolean createForce;
	private boolean rename;

	@Option(name = "--remote", aliases = { "-r" }, usage = "usage_actOnRemoteTrackingBranches")
	private boolean remote = false;

	@Option(name = "--all", aliases = { "-a" }, usage = "usage_listBothRemoteTrackingAndLocalBranches")
	private boolean all = false;

	@Option(name = "--contains", metaVar = "metaVar_commitish", usage = "usage_printOnlyBranchesThatContainTheCommit")
	private String containsCommitish;

	private List<String> delete;

	/**
	* Delete branches
	*
	* @param names
	* a {@link java.util.List} of branch names.
	*/
	@Option(name = "--delete", aliases = {
	"-d" }, metaVar = "metaVar_branchNames", usage = "usage_deleteFullyMergedBranch", handler = OptionWithValuesListHandler.class)
	public void delete(List<String> names) {
	if (names.isEmpty()) {
	throw die(CLIText.get().branchNameRequired);
	}
	delete = names;
	}

	private List<String> deleteForce;

	/**
	* Forcefully delete branches
	*
	* @param names
	* a {@link java.util.List} of branch names.
	*/
	@Option(name = "--delete-force", aliases = {
	"-D" }, metaVar = "metaVar_branchNames", usage = "usage_deleteBranchEvenIfNotMerged", handler = OptionWithValuesListHandler.class)
	public void deleteForce(List<String> names) {
	if (names.isEmpty()) {
	throw die(CLIText.get().branchNameRequired);
	}
	deleteForce = names;
	}

	/**
	* Forcefully create a list of branches
	*
	* @param branchAndStartPoint
	* a branch name and a start point
	*/
	@Option(name = "--create-force", aliases = {
	"-f" }, metaVar = "metaVar_branchAndStartPoint", usage = "usage_forceCreateBranchEvenExists", handler = OptionWithValuesListHandler.class)
	public void createForce(List<String> branchAndStartPoint) {
	createForce = true;
	if (branchAndStartPoint.isEmpty()) {
	throw die(CLIText.get().branchNameRequired);
	}
	if (branchAndStartPoint.size() > 2) {
	throw die(CLIText.get().tooManyRefsGiven);
	}
	if (branchAndStartPoint.size() == 1) {
	branch = branchAndStartPoint.get(0);
	} else {
	branch = branchAndStartPoint.get(0);
	otherBranch = branchAndStartPoint.get(1);
	}
	}

	/**
	* Move or rename a branch
	*
	* @param currentAndNew
	* the current and the new branch name
	*/
	@Option(name = "--move", aliases = {
	"-m" }, metaVar = "metaVar_oldNewBranchNames", usage = "usage_moveRenameABranch", handler = OptionWithValuesListHandler.class)
	public void moveRename(List<String> currentAndNew) {
	rename = true;
	if (currentAndNew.isEmpty()) {
	throw die(CLIText.get().branchNameRequired);
	}
	if (currentAndNew.size() > 2) {
	throw die(CLIText.get().tooManyRefsGiven);
	}
	if (currentAndNew.size() == 1) {
	branch = currentAndNew.get(0);
	} else {
	branch = currentAndNew.get(0);
	otherBranch = currentAndNew.get(1);
	}
	}

	@Option(name = "--verbose", aliases = { "-v" }, usage = "usage_beVerbose")
	private boolean verbose = false;

	@Argument(metaVar = "metaVar_name")
	private String branch;

	private final Map<String, Ref> printRefs = new LinkedHashMap<>();

	/** Only set for verbose branch listing at-the-moment */
	private RevWalk rw;

	private int maxNameLength;

	/** {@inheritDoc} */
	@Override
	protected void run() throws Exception {
	if (delete != null \|\| deleteForce != null) {
	if (delete != null) {
	delete(delete, false);
	}
	if (deleteForce != null) {
	delete(deleteForce, true);
	}
	} else {
	if (rename) {
	String src, dst;
	if (otherBranch == null) {
	final Ref head = db.exactRef(Constants.HEAD);
	if (head != null && head.isSymbolic()) {
	src = head.getLeaf().getName();
	} else {
	throw die(CLIText.get().cannotRenameDetachedHEAD);
	}
	dst = branch;
	} else {
	src = branch;
	final Ref old = db.findRef(src);
	if (old == null)
	throw die(MessageFormat.format(CLIText.get().doesNotExist, src));
	if (!old.getName().startsWith(Constants.R_HEADS))
	throw die(MessageFormat.format(CLIText.get().notABranch, src));
	src = old.getName();
	dst = otherBranch;
	}

	if (!dst.startsWith(Constants.R_HEADS))
	dst = Constants.R_HEADS + dst;
	if (!Repository.isValidRefName(dst))
	throw die(MessageFormat.format(CLIText.get().notAValidRefName, dst));

	RefRename r = db.renameRef(src, dst);
	if (r.rename() != Result.RENAMED)
	throw die(MessageFormat.format(CLIText.get().cannotBeRenamed, src));

	} else if (createForce \|\| branch != null) {
	String newHead = branch;
	String startBranch;
	if (createForce) {
	startBranch = otherBranch;
	} else {
	startBranch = Constants.HEAD;
	}
	Ref startRef = db.findRef(startBranch);
	ObjectId startAt = db.resolve(startBranch + "^0"); //$NON-NLS-1$
	if (startRef != null) {
	startBranch = startRef.getName();
	} else if (startAt != null) {
	startBranch = startAt.name();
	} else {
	throw die(MessageFormat.format(
	CLIText.get().notAValidCommitName, startBranch));
	}
	startBranch = Repository.shortenRefName(startBranch);
	String newRefName = newHead;
	if (!newRefName.startsWith(Constants.R_HEADS)) {
	newRefName = Constants.R_HEADS + newRefName;
	}
	if (!Repository.isValidRefName(newRefName)) {
	throw die(MessageFormat.format(CLIText.get().notAValidRefName, newRefName));
	}
	if (!createForce && db.resolve(newRefName) != null) {
	throw die(MessageFormat.format(CLIText.get().branchAlreadyExists, newHead));
	}
	RefUpdate updateRef = db.updateRef(newRefName);
	updateRef.setNewObjectId(startAt);
	updateRef.setForceUpdate(createForce);
	updateRef.setRefLogMessage(MessageFormat.format(CLIText.get().branchCreatedFrom, startBranch), false);
	Result update = updateRef.update();
	if (update == Result.REJECTED) {
	throw die(MessageFormat.format(CLIText.get().couldNotCreateBranch, newHead, update.toString()));
	}
	} else {
	if (verbose) {
	rw = new RevWalk(db);
	}
	list();
	}
	}
	}

	private void list() throws Exception {
	Ref head = db.exactRef(Constants.HEAD);
	// This can happen if HEAD is stillborn
	if (head != null) {
	String current = head.getLeaf().getName();
	try (Git git = new Git(db)) {
	ListBranchCommand command = git.branchList();
	if (all)
	command.setListMode(ListMode.ALL);
	else if (remote)
	command.setListMode(ListMode.REMOTE);

	if (containsCommitish != null)
	command.setContains(containsCommitish);

	List<Ref> refs = command.call();
	for (Ref ref : refs) {
	if (ref.getName().equals(Constants.HEAD))
	addRef("(no branch)", head); //$NON-NLS-1$
	}

	addRefs(refs, Constants.R_HEADS);
	addRefs(refs, Constants.R_REMOTES);

	try (ObjectReader reader = db.newObjectReader()) {
	for (Entry<String, Ref> e : printRefs.entrySet()) {
	final Ref ref = e.getValue();
	printHead(reader, e.getKey(),
	current.equals(ref.getName()), ref);
	}
	}
	}
	}
	}

	private void addRefs(Collection<Ref> refs, String prefix) {
	for (Ref ref : RefComparator.sort(refs)) {
	final String name = ref.getName();
	if (name.startsWith(prefix))
	addRef(name.substring(name.indexOf('/', 5) + 1), ref);
	}
	}

	private void addRef(String name, Ref ref) {
	printRefs.put(name, ref);
	maxNameLength = Math.max(maxNameLength, name.length());
	}

	private void printHead(final ObjectReader reader, final String ref,
	final boolean isCurrent, final Ref refObj) throws Exception {
	outw.print(isCurrent ? '*' : ' ');
	outw.print(' ');
	outw.print(ref);
	if (verbose) {
	final int spaces = maxNameLength - ref.length() + 1;
	outw.format("%" + spaces + "s", ""); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
	final ObjectId objectId = refObj.getObjectId();
	outw.print(reader.abbreviate(objectId).name());
	outw.print(' ');
	outw.print(rw.parseCommit(objectId).getShortMessage());
	}
	outw.println();
	}

	private void delete(List<String> branches, boolean force)
	throws IOException {
	String current = db.getBranch();
	ObjectId head = db.resolve(Constants.HEAD);
	for (String b : branches) {
	if (b.equals(current)) {
	throw die(MessageFormat.format(CLIText.get().cannotDeleteTheBranchWhichYouAreCurrentlyOn, b));
	}
	RefUpdate update = db.updateRef((remote ? Constants.R_REMOTES
	: Constants.R_HEADS)
	+ b);
	update.setNewObjectId(head);
	update.setForceUpdate(force \|\| remote);
	Result result = update.delete();
	if (result == Result.REJECTED) {
	throw die(MessageFormat.format(CLIText.get().branchIsNotAnAncestorOfYourCurrentHEAD, b));
	} else if (result == Result.NEW)
	throw die(MessageFormat.format(CLIText.get().branchNotFound, b));
	if (remote)
	outw.println(MessageFormat.format(CLIText.get().deletedRemoteBranch, b));
	else if (verbose)
	outw.println(MessageFormat.format(CLIText.get().deletedBranch, b));
	}
	}
	}