[pgm] Use LsRemoteCommand to implement ls-remote and add a test

Change-Id: Ic266f844c23e2519df5770ca56284b26e4cfe1f4
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>

org.eclipse.jgit.pgm.test/tst/org/eclipse/jgit/pgm/LsRemoteTest.java

@@ -0,0 +1,96 @@
+/*
+ * Copyright (C) 2014, Matthias Sohn <matthias.sohn@sap.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.pgm;
+
+import static org.junit.Assert.assertArrayEquals;
+
+import java.util.List;
+
+import org.eclipse.jgit.api.Git;
+import org.eclipse.jgit.lib.CLIRepositoryTestCase;
+import org.eclipse.jgit.lib.Constants;
+import org.eclipse.jgit.lib.RefUpdate;
+import org.junit.Before;
+import org.junit.Test;
+
+public class LsRemoteTest extends CLIRepositoryTestCase {
+	private Git git;
+
+	@Override
+	@Before
+	public void setUp() throws Exception {
+		super.setUp();
+		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");
+
+		// tags
+		git.tag().setName("tag1").call();
+		git.tag().setName("tag2").call();
+		git.tag().setName("tag3").call();
+	}
+
+	@Test
+	public void testLsRemote() throws Exception {
+		final List<String> result = CLIGitCommand.execute(
+				"git ls-remote " + db.getDirectory(), db);
+		assertArrayEquals(new String[] {
+				"d0b1ef2b3dea02bb2ca824445c04e6def012c32c	HEAD",
+				"d0b1ef2b3dea02bb2ca824445c04e6def012c32c	refs/heads/master",
+				"d0b1ef2b3dea02bb2ca824445c04e6def012c32c	refs/heads/test",
+				"efc02078d83a5226986ae917323acec7e1e8b7cb	refs/tags/tag1",
+				"d0b1ef2b3dea02bb2ca824445c04e6def012c32c	refs/tags/tag1^{}",
+				"4e4b837e0fd4ba83c003678b03592dc1509a4115	refs/tags/tag2",
+				"d0b1ef2b3dea02bb2ca824445c04e6def012c32c	refs/tags/tag2^{}",
+				"489384bf8ace47522fe32093d2ceb85b65a6cbb1	refs/tags/tag3",
+				"d0b1ef2b3dea02bb2ca824445c04e6def012c32c	refs/tags/tag3^{}",
+				"" }, result.toArray());
+	}
+}

org.eclipse.jgit.pgm/src/org/eclipse/jgit/pgm/LsRemote.java

@@ -46,13 +46,15 @@
 package org.eclipse.jgit.pgm;
 
 import java.io.IOException;
+import java.util.Comparator;
+import java.util.TreeSet;
 
-import org.kohsuke.args4j.Argument;
-import org.kohsuke.args4j.Option;
+import org.eclipse.jgit.api.Git;
+import org.eclipse.jgit.api.LsRemoteCommand;
 import org.eclipse.jgit.lib.AnyObjectId;
 import org.eclipse.jgit.lib.Ref;
-import org.eclipse.jgit.transport.FetchConnection;
-import org.eclipse.jgit.transport.Transport;
+import org.kohsuke.args4j.Argument;
+import org.kohsuke.args4j.Option;
 
 @Command(common = true, usage = "usage_LsRemote")
 class LsRemote extends TextBuiltin {
@@ -64,19 +66,19 @@ class LsRemote extends TextBuiltin {
 
 	@Override
 	protected void run() throws Exception {
-		final Transport tn = Transport.open(db, remote);
-		if (0 <= timeout)
-			tn.setTimeout(timeout);
-		final FetchConnection c = tn.openFetch();
-		try {
-			for (final Ref r : c.getRefs()) {
-				show(r.getObjectId(), r.getName());
-				if (r.getPeeledObjectId() != null)
-					show(r.getPeeledObjectId(), r.getName() + "^{}"); //$NON-NLS-1$
+		LsRemoteCommand command = Git.lsRemoteRepository().setRemote(remote)
+				.setTimeout(timeout);
+		TreeSet<Ref> refs = new TreeSet<Ref>(new Comparator<Ref>() {
+
+			public int compare(Ref r1, Ref r2) {
+				return r1.getName().compareTo(r2.getName());
 			}
-		} finally {
-			c.close();
-			tn.close();
+		});
+		refs.addAll(command.call());
+		for (final Ref r : refs) {
+			show(r.getObjectId(), r.getName());
+			if (r.getPeeledObjectId() != null)
+				show(r.getPeeledObjectId(), r.getName() + "^{}"); //$NON-NLS-1$
 		}
 	}