Extract protocol constants to a common class

This avoids the server from referencing the client code directly.

Change-Id: Ie6ade781b5a689646ad8b0b2988ef2b544412195

org.eclipse.jgit.http.server/src/org/eclipse/jgit/http/server/GitSmartHttpTools.java

 package org.eclipse.jgit.http.server;
 
 import static org.eclipse.jgit.http.server.ServletUtils.ATTRIBUTE_HANDLER;
-import static org.eclipse.jgit.transport.BasePackFetchConnection.OPTION_SIDE_BAND;
-import static org.eclipse.jgit.transport.BasePackFetchConnection.OPTION_SIDE_BAND_64K;
-import static org.eclipse.jgit.transport.BasePackPushConnection.CAPABILITY_SIDE_BAND_64K;
+import static org.eclipse.jgit.transport.GitProtocolConstants.OPTION_SIDE_BAND;
+import static org.eclipse.jgit.transport.GitProtocolConstants.OPTION_SIDE_BAND_64K;
+import static org.eclipse.jgit.transport.GitProtocolConstants.CAPABILITY_SIDE_BAND_64K;
 import static org.eclipse.jgit.transport.SideBandOutputStream.CH_ERROR;
 import static org.eclipse.jgit.transport.SideBandOutputStream.SMALL_BUF;
 import static javax.servlet.http.HttpServletResponse.SC_FORBIDDEN;

org.eclipse.jgit/src/org/eclipse/jgit/transport/BasePackFetchConnection.java

 import org.eclipse.jgit.lib.ObjectInserter;
 import org.eclipse.jgit.lib.ProgressMonitor;
 import org.eclipse.jgit.lib.Ref;
+import org.eclipse.jgit.transport.GitProtocolConstants.MultiAck;
 import org.eclipse.jgit.revwalk.RevCommit;
 import org.eclipse.jgit.revwalk.RevCommitList;
 import org.eclipse.jgit.revwalk.RevFlag;
 	 * Include tags if we are also including the referenced objects.
 	 * @since 2.0
 	 */
-	public static final String OPTION_INCLUDE_TAG = "include-tag"; //$NON-NLS-1$
+	public static final String OPTION_INCLUDE_TAG = GitProtocolConstants.OPTION_INCLUDE_TAG;
 
 	/**
 	 * Mutli-ACK support for improved negotiation.
 	 * @since 2.0
 	 */
-	public static final String OPTION_MULTI_ACK = "multi_ack"; //$NON-NLS-1$
+	public static final String OPTION_MULTI_ACK = GitProtocolConstants.OPTION_MULTI_ACK;
 
 	/**
 	 * Mutli-ACK detailed support for improved negotiation.
 	 * @since 2.0
 	 */
-	public static final String OPTION_MULTI_ACK_DETAILED = "multi_ack_detailed"; //$NON-NLS-1$
+	public static final String OPTION_MULTI_ACK_DETAILED = GitProtocolConstants.OPTION_MULTI_ACK_DETAILED;
 
 	/**
 	 * The client supports packs with deltas but not their bases.
 	 * @since 2.0
 	 */
-	public static final String OPTION_THIN_PACK = "thin-pack"; //$NON-NLS-1$
+	public static final String OPTION_THIN_PACK = GitProtocolConstants.OPTION_THIN_PACK;
 
 	/**
 	 * The client supports using the side-band for progress messages.
 	 * @since 2.0
 	 */
-	public static final String OPTION_SIDE_BAND = "side-band"; //$NON-NLS-1$
+	public static final String OPTION_SIDE_BAND = GitProtocolConstants.OPTION_SIDE_BAND;
 
 	/**
 	 * The client supports using the 64K side-band for progress messages.
 	 * @since 2.0
 	 */
-	public static final String OPTION_SIDE_BAND_64K = "side-band-64k"; //$NON-NLS-1$
+	public static final String OPTION_SIDE_BAND_64K = GitProtocolConstants.OPTION_SIDE_BAND_64K;
 
 	/**
 	 * The client supports packs with OFS deltas.
 	 * @since 2.0
 	 */
-	public static final String OPTION_OFS_DELTA = "ofs-delta"; //$NON-NLS-1$
+	public static final String OPTION_OFS_DELTA = GitProtocolConstants.OPTION_OFS_DELTA;
 
 	/**
 	 * The client supports shallow fetches.
 	 * @since 2.0
 	 */
-	public static final String OPTION_SHALLOW = "shallow"; //$NON-NLS-1$
+	public static final String OPTION_SHALLOW = GitProtocolConstants.OPTION_SHALLOW;
 
 	/**
 	 * The client does not want progress messages and will ignore them.
 	 * @since 2.0
 	 */
-	public static final String OPTION_NO_PROGRESS = "no-progress"; //$NON-NLS-1$
+	public static final String OPTION_NO_PROGRESS = GitProtocolConstants.OPTION_NO_PROGRESS;
 
 	/**
 	 * The client supports receiving a pack before it has sent "done".
 	 * @since 2.0
 	 */
-	public static final String OPTION_NO_DONE = "no-done"; //$NON-NLS-1$
+	public static final String OPTION_NO_DONE = GitProtocolConstants.OPTION_NO_DONE;
 
 	/**
 	 * The client supports fetching objects at the tip of any ref, even if not
 	 * advertised.
 	 * @since 3.1
 	 */
-	public static final String OPTION_ALLOW_TIP_SHA1_IN_WANT = "allow-tip-sha1-in-want"; //$NON-NLS-1$
-
-	static enum MultiAck {
-		OFF, CONTINUE, DETAILED;
-	}
+	public static final String OPTION_ALLOW_TIP_SHA1_IN_WANT = GitProtocolConstants.OPTION_ALLOW_TIP_SHA1_IN_WANT;
 
 	private final RevWalk walk;
 

org.eclipse.jgit/src/org/eclipse/jgit/transport/BasePackPushConnection.java

 	 * The client expects a status report after the server processes the pack.
 	 * @since 2.0
 	 */
-	public static final String CAPABILITY_REPORT_STATUS = "report-status"; //$NON-NLS-1$
+	public static final String CAPABILITY_REPORT_STATUS = GitProtocolConstants.CAPABILITY_REPORT_STATUS;
 
 	/**
 	 * The server supports deleting refs.
 	 * @since 2.0
 	 */
-	public static final String CAPABILITY_DELETE_REFS = "delete-refs"; //$NON-NLS-1$
+	public static final String CAPABILITY_DELETE_REFS = GitProtocolConstants.CAPABILITY_DELETE_REFS;
 
 	/**
 	 * The server supports packs with OFS deltas.
 	 * @since 2.0
 	 */
-	public static final String CAPABILITY_OFS_DELTA = "ofs-delta"; //$NON-NLS-1$
+	public static final String CAPABILITY_OFS_DELTA = GitProtocolConstants.CAPABILITY_OFS_DELTA;
 
 	/**
 	 * The client supports using the 64K side-band for progress messages.
 	 * @since 2.0
 	 */
-	public static final String CAPABILITY_SIDE_BAND_64K = "side-band-64k"; //$NON-NLS-1$
+	public static final String CAPABILITY_SIDE_BAND_64K = GitProtocolConstants.CAPABILITY_SIDE_BAND_64K;
 
 	private final boolean thinPack;
 

org.eclipse.jgit/src/org/eclipse/jgit/transport/BaseReceivePack.java

 
 package org.eclipse.jgit.transport;
 
-import static org.eclipse.jgit.transport.BasePackPushConnection.CAPABILITY_DELETE_REFS;
-import static org.eclipse.jgit.transport.BasePackPushConnection.CAPABILITY_OFS_DELTA;
-import static org.eclipse.jgit.transport.BasePackPushConnection.CAPABILITY_REPORT_STATUS;
-import static org.eclipse.jgit.transport.BasePackPushConnection.CAPABILITY_SIDE_BAND_64K;
+import static org.eclipse.jgit.transport.GitProtocolConstants.CAPABILITY_DELETE_REFS;
+import static org.eclipse.jgit.transport.GitProtocolConstants.CAPABILITY_OFS_DELTA;
+import static org.eclipse.jgit.transport.GitProtocolConstants.CAPABILITY_REPORT_STATUS;
+import static org.eclipse.jgit.transport.GitProtocolConstants.CAPABILITY_SIDE_BAND_64K;
 import static org.eclipse.jgit.transport.SideBandOutputStream.CH_DATA;
 import static org.eclipse.jgit.transport.SideBandOutputStream.CH_PROGRESS;
 import static org.eclipse.jgit.transport.SideBandOutputStream.MAX_BUF;

org.eclipse.jgit/src/org/eclipse/jgit/transport/GitProtocolConstants.java

+/*
+ * Copyright (C) 2008-2013, Google Inc.
+ * Copyright (C) 2008, Robin Rosenberg <robin.rosenberg@dewire.com>
+ * Copyright (C) 2008, Shawn O. Pearce <spearce@spearce.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.transport;
+
+/**
+ * Wire constants for the native Git protocol.
+ *
+ * @since 3.2
+ */
+public class GitProtocolConstants {
+	/**
+	 * Include tags if we are also including the referenced objects.
+	 *
+	 * @since 3.2
+	 */
+	public static final String OPTION_INCLUDE_TAG = "include-tag"; //$NON-NLS-1$
+
+	/**
+	 * Mutli-ACK support for improved negotiation.
+	 *
+	 * @since 3.2
+	 */
+	public static final String OPTION_MULTI_ACK = "multi_ack"; //$NON-NLS-1$
+
+	/**
+	 * Mutli-ACK detailed support for improved negotiation.
+	 *
+	 * @since 3.2
+	 */
+	public static final String OPTION_MULTI_ACK_DETAILED = "multi_ack_detailed"; //$NON-NLS-1$
+
+	/**
+	 * The client supports packs with deltas but not their bases.
+	 *
+	 * @since 3.2
+	 */
+	public static final String OPTION_THIN_PACK = "thin-pack"; //$NON-NLS-1$
+
+	/**
+	 * The client supports using the side-band for progress messages.
+	 *
+	 * @since 3.2
+	 */
+	public static final String OPTION_SIDE_BAND = "side-band"; //$NON-NLS-1$
+
+	/**
+	 * The client supports using the 64K side-band for progress messages.
+	 *
+	 * @since 3.2
+	 */
+	public static final String OPTION_SIDE_BAND_64K = "side-band-64k"; //$NON-NLS-1$
+
+	/**
+	 * The client supports packs with OFS deltas.
+	 *
+	 * @since 3.2
+	 */
+	public static final String OPTION_OFS_DELTA = "ofs-delta"; //$NON-NLS-1$
+
+	/**
+	 * The client supports shallow fetches.
+	 *
+	 * @since 3.2
+	 */
+	public static final String OPTION_SHALLOW = "shallow"; //$NON-NLS-1$
+
+	/**
+	 * The client does not want progress messages and will ignore them.
+	 *
+	 * @since 3.2
+	 */
+	public static final String OPTION_NO_PROGRESS = "no-progress"; //$NON-NLS-1$
+
+	/**
+	 * The client supports receiving a pack before it has sent "done".
+	 *
+	 * @since 3.2
+	 */
+	public static final String OPTION_NO_DONE = "no-done"; //$NON-NLS-1$
+
+	/**
+	 * The client supports fetching objects at the tip of any ref, even if not
+	 * advertised.
+	 *
+	 * @since 3.2
+	 */
+	public static final String OPTION_ALLOW_TIP_SHA1_IN_WANT = "allow-tip-sha1-in-want"; //$NON-NLS-1$
+
+	/**
+	 * The client expects a status report after the server processes the pack.
+	 *
+	 * @since 3.2
+	 */
+	public static final String CAPABILITY_REPORT_STATUS = "report-status"; //$NON-NLS-1$
+
+	/**
+	 * The server supports deleting refs.
+	 *
+	 * @since 3.2
+	 */
+	public static final String CAPABILITY_DELETE_REFS = "delete-refs"; //$NON-NLS-1$
+
+	/**
+	 * The server supports packs with OFS deltas.
+	 *
+	 * @since 3.2
+	 */
+	public static final String CAPABILITY_OFS_DELTA = "ofs-delta"; //$NON-NLS-1$
+
+	/**
+	 * The client supports using the 64K side-band for progress messages.
+	 *
+	 * @since 3.2
+	 */
+	public static final String CAPABILITY_SIDE_BAND_64K = "side-band-64k"; //$NON-NLS-1$
+
+	static enum MultiAck {
+		OFF, CONTINUE, DETAILED;
+	}
+
+	private GitProtocolConstants() {
+	}
+}

org.eclipse.jgit/src/org/eclipse/jgit/transport/ReceivePack.java

 
 package org.eclipse.jgit.transport;
 
-import static org.eclipse.jgit.transport.BasePackPushConnection.CAPABILITY_REPORT_STATUS;
+import static org.eclipse.jgit.transport.GitProtocolConstants.CAPABILITY_REPORT_STATUS;
 
 import java.io.IOException;
 import java.io.InputStream;

org.eclipse.jgit/src/org/eclipse/jgit/transport/UploadPack.java

 package org.eclipse.jgit.transport;
 
 import static org.eclipse.jgit.lib.RefDatabase.ALL;
+import static org.eclipse.jgit.transport.GitProtocolConstants.OPTION_ALLOW_TIP_SHA1_IN_WANT;
+import static org.eclipse.jgit.transport.GitProtocolConstants.OPTION_INCLUDE_TAG;
+import static org.eclipse.jgit.transport.GitProtocolConstants.OPTION_MULTI_ACK;
+import static org.eclipse.jgit.transport.GitProtocolConstants.OPTION_MULTI_ACK_DETAILED;
+import static org.eclipse.jgit.transport.GitProtocolConstants.OPTION_NO_DONE;
+import static org.eclipse.jgit.transport.GitProtocolConstants.OPTION_NO_PROGRESS;
+import static org.eclipse.jgit.transport.GitProtocolConstants.OPTION_OFS_DELTA;
+import static org.eclipse.jgit.transport.GitProtocolConstants.OPTION_SHALLOW;
+import static org.eclipse.jgit.transport.GitProtocolConstants.OPTION_SIDE_BAND;
+import static org.eclipse.jgit.transport.GitProtocolConstants.OPTION_SIDE_BAND_64K;
+import static org.eclipse.jgit.transport.GitProtocolConstants.OPTION_THIN_PACK;
 
 import java.io.EOFException;
 import java.io.IOException;
 import org.eclipse.jgit.revwalk.RevWalk;
 import org.eclipse.jgit.revwalk.filter.CommitTimeRevFilter;
 import org.eclipse.jgit.storage.pack.PackConfig;
-import org.eclipse.jgit.transport.BasePackFetchConnection.MultiAck;
+import org.eclipse.jgit.transport.GitProtocolConstants.MultiAck;
 import org.eclipse.jgit.transport.RefAdvertiser.PacketLineOutRefAdvertiser;
 import org.eclipse.jgit.util.io.InterruptTimer;
 import org.eclipse.jgit.util.io.NullOutputStream;
  * Implements the server side of a fetch connection, transmitting objects.
  */
 public class UploadPack {
-	static final String OPTION_ALLOW_TIP_SHA1_IN_WANT = BasePackFetchConnection.OPTION_ALLOW_TIP_SHA1_IN_WANT;
-
-	static final String OPTION_INCLUDE_TAG = BasePackFetchConnection.OPTION_INCLUDE_TAG;
-
-	static final String OPTION_MULTI_ACK = BasePackFetchConnection.OPTION_MULTI_ACK;
-
-	static final String OPTION_MULTI_ACK_DETAILED = BasePackFetchConnection.OPTION_MULTI_ACK_DETAILED;
-
-	static final String OPTION_THIN_PACK = BasePackFetchConnection.OPTION_THIN_PACK;
-
-	static final String OPTION_SIDE_BAND = BasePackFetchConnection.OPTION_SIDE_BAND;
-
-	static final String OPTION_SIDE_BAND_64K = BasePackFetchConnection.OPTION_SIDE_BAND_64K;
-
-	static final String OPTION_OFS_DELTA = BasePackFetchConnection.OPTION_OFS_DELTA;
-
-	static final String OPTION_NO_PROGRESS = BasePackFetchConnection.OPTION_NO_PROGRESS;
-
-	static final String OPTION_NO_DONE = BasePackFetchConnection.OPTION_NO_DONE;
-
-	static final String OPTION_SHALLOW = BasePackFetchConnection.OPTION_SHALLOW;
-
 	/** Policy the server uses to validate client requests */
 	public static enum RequestPolicy {
 		/** Client may only ask for objects the server advertised a reference for. */