reset command should support the -- <paths> parameters

Bug: 480750
Change-Id: Ia85b1aead03dcf2fcb50ce0391b656f7c60a08d4
Signed-off-by: Kaloyan Raev <kaloyan.r@zend.com>

org.eclipse.jgit.pgm.test/src/org/eclipse/jgit/lib/CLIRepositoryTestCase.java

@@ -164,6 +164,14 @@ public class CLIRepositoryTestCase extends LocalDiskRepositoryTestCase {
 				.replaceAll("\t", "\\\\t");
 	}
 
+	protected void assertStringArrayEquals(String expected, String[] actual) {
+		// if there is more than one line, ignore last one if empty
+		assertEquals(1,
+				actual.length > 1 && actual[actual.length - 1].equals("")
+						? actual.length - 1 : actual.length);
+		assertEquals(expected, actual[0]);
+	}
+
 	protected void assertArrayOfLinesEquals(String[] expected, String[] actual) {
 		assertEquals(toText(expected), toText(actual));
 	}

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

@@ -556,15 +556,6 @@ public class CheckoutTest extends CLIRepositoryTestCase {
 		// assertEquals("a/c", exception.getConflictingPaths().get(1));
 	}
 
-	static private void assertStringArrayEquals(String expected, String[] actual) {
-		// if there is more than one line, ignore last one if empty
-		assertEquals(
-				1,
-				actual.length > 1 && actual[actual.length - 1].equals("") ? actual.length - 1
-						: actual.length);
-		assertEquals(expected, actual[0]);
-	}
-
 	@Test
 	public void testCheckoutPath() throws Exception {
 		Git git = new Git(db);

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

@@ -0,0 +1,133 @@
+/*
+ * Copyright (C) 2015, Kaloyan Raev <kaloyan.r@zend.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.*;
+
+import org.eclipse.jgit.api.Git;
+import org.eclipse.jgit.lib.CLIRepositoryTestCase;
+import org.eclipse.jgit.revwalk.RevCommit;
+import org.junit.Before;
+import org.junit.Test;
+
+public class ResetTest extends CLIRepositoryTestCase {
+
+	private Git git;
+
+	@Override
+	@Before
+	public void setUp() throws Exception {
+		super.setUp();
+		git = new Git(db);
+	}
+
+	@Test
+	public void testResetSelf() throws Exception {
+		RevCommit commit = git.commit().setMessage("initial commit").call();
+		assertStringArrayEquals("",
+				execute("git reset --hard " + commit.getId().name()));
+		assertEquals(commit.getId(),
+				git.getRepository().getRef("HEAD").getObjectId());
+	}
+
+	@Test
+	public void testResetPrevious() throws Exception {
+		RevCommit commit = git.commit().setMessage("initial commit").call();
+		git.commit().setMessage("second commit").call();
+		assertStringArrayEquals("",
+				execute("git reset --hard " + commit.getId().name()));
+		assertEquals(commit.getId(),
+				git.getRepository().getRef("HEAD").getObjectId());
+	}
+
+	@Test
+	public void testResetEmptyPath() throws Exception {
+		RevCommit commit = git.commit().setMessage("initial commit").call();
+		assertStringArrayEquals("",
+				execute("git reset --hard " + commit.getId().name() + " --"));
+		assertEquals(commit.getId(),
+				git.getRepository().getRef("HEAD").getObjectId());
+	}
+
+	@Test
+	public void testResetPathDoubleDash() throws Exception {
+		resetPath(true);
+	}
+
+	@Test
+	public void testResetPathNoDoubleDash() throws Exception {
+		resetPath(false);
+	}
+
+	private void resetPath(boolean useDoubleDash) throws Exception {
+		// create files a and b
+		writeTrashFile("a", "Hello world a");
+		writeTrashFile("b", "Hello world b");
+		// stage the files
+		git.add().addFilepattern(".").call();
+		// commit the files
+		RevCommit commit = git.commit().setMessage("files a & b").call();
+
+		// change both files a and b
+		writeTrashFile("a", "New Hello world a");
+		writeTrashFile("b", "New Hello world b");
+		// stage the files
+		git.add().addFilepattern(".").call();
+
+		// reset only file a
+		String cmd = String.format("git reset %s%s a", commit.getId().name(),
+				(useDoubleDash) ? " --" : "");
+		assertStringArrayEquals("", execute(cmd));
+		assertEquals(commit.getId(),
+				git.getRepository().getRef("HEAD").getObjectId());
+
+		org.eclipse.jgit.api.Status status = git.status().call();
+		// assert that file a is unstaged
+		assertArrayEquals(new String[] { "a" },
+				status.getModified().toArray());
+		// assert that file b is still staged
+		assertArrayEquals(new String[] { "b" },
+				status.getChanged().toArray());
+	}
+
+}

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

@@ -43,11 +43,15 @@
 
 package org.eclipse.jgit.pgm;
 
+import java.util.ArrayList;
+import java.util.List;
+
 import org.eclipse.jgit.api.Git;
 import org.eclipse.jgit.api.ResetCommand;
 import org.eclipse.jgit.api.ResetCommand.ResetType;
 import org.kohsuke.args4j.Argument;
 import org.kohsuke.args4j.Option;
+import org.kohsuke.args4j.spi.StopOptionHandler;
 
 @Command(common = true, usage = "usage_reset")
 class Reset extends TextBuiltin {
@@ -61,24 +65,33 @@ class Reset extends TextBuiltin {
 	@Option(name = "--hard", usage = "usage_resetHard")
 	private boolean hard = false;
 
-	@Argument(required = true, metaVar = "metaVar_name", usage = "usage_reset")
+	@Argument(required = true, index = 0, metaVar = "metaVar_name", usage = "usage_reset")
 	private String commit;
 
+	@Argument(index = 1)
+	@Option(name = "--", metaVar = "metaVar_paths", multiValued = true, handler = StopOptionHandler.class)
+	private List<String> paths = new ArrayList<String>();
+
 	@Override
 	protected void run() throws Exception {
 		try (Git git = new Git(db)) {
 			ResetCommand command = git.reset();
 			command.setRef(commit);
-			ResetType mode = null;
-			if (soft)
-				mode = selectMode(mode, ResetType.SOFT);
-			if (mixed)
-				mode = selectMode(mode, ResetType.MIXED);
-			if (hard)
-				mode = selectMode(mode, ResetType.HARD);
-			if (mode == null)
-				throw die("no reset mode set");
-			command.setMode(mode);
+			if (paths.size() > 0) {
+				for (String path : paths)
+					command.addPath(path);
+			} else {
+				ResetType mode = null;
+				if (soft)
+					mode = selectMode(mode, ResetType.SOFT);
+				if (mixed)
+					mode = selectMode(mode, ResetType.MIXED);
+				if (hard)
+					mode = selectMode(mode, ResetType.HARD);
+				if (mode == null)
+					throw die("no reset mode set");
+				command.setMode(mode);
+			}
 			command.call();
 		}
 	}