commit command: allow to specify path(s) argument(s)

This fixes the command below:

jgit commit a -m "added file a"

which currently fails with:

org.eclipse.jgit.api.errors.JGitInternalException: The combination of
arguments --all and --only is not allowed

Bug: 484973
Change-Id: I37a4ccd68101a66520ef99110f7aa0cbdcc8beba
Signed-off-by: Andrey Loskutov <loskutov@gmx.de>

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

@@ -0,0 +1,113 @@
+/*
+ * Copyright (C) 2015, Andrey Loskutov <loskutov@gmx.de>
+ * 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.assertTrue;
+
+import org.eclipse.jgit.lib.CLIRepositoryTestCase;
+import org.junit.Test;
+
+public class CommitTest extends CLIRepositoryTestCase {
+
+	@Test
+	public void testCommitPath() throws Exception {
+		writeTrashFile("a", "a");
+		writeTrashFile("b", "a");
+		String result = toString(execute("git add a"));
+		assertTrue("Unexpected output: " + result, result.isEmpty());
+
+		result = toString(execute("git status -- a"));
+		assertTrue("Unexpected output: " + result,
+				result.contains("new file:   a"));
+
+		result = toString(execute("git status -- b"));
+		assertTrue("Unexpected output: " + result,
+				result.trim().contains("Untracked files:\n	b"));
+
+		result = toString(execute("git commit a -m 'added a'"));
+		assertTrue("Unexpected output: " + result, result.contains("added a"));
+
+		result = toString(execute("git status -- a"));
+		assertTrue("Unexpected output: " + result,
+				result.trim().equals("On branch master"));
+
+		result = toString(execute("git status -- b"));
+		assertTrue("Unexpected output: " + result,
+				result.trim().contains("Untracked files:\n	b"));
+	}
+
+	@Test
+	public void testCommitAll() throws Exception {
+		writeTrashFile("a", "a");
+		writeTrashFile("b", "a");
+		String result = toString(execute("git add a b"));
+		assertTrue("Unexpected output: " + result, result.isEmpty());
+
+		result = toString(execute("git status -- a b"));
+		assertTrue("Unexpected output: " + result,
+				result.contains("new file:   a"));
+		assertTrue("Unexpected output: " + result,
+				result.contains("new file:   b"));
+
+		result = toString(execute("git commit -m 'added a b'"));
+		assertTrue("Unexpected output: " + result,
+				result.contains("added a b"));
+
+		result = toString(execute("git status -- a b"));
+		assertTrue("Unexpected output: " + result,
+				result.trim().equals("On branch master"));
+	}
+
+	String toString(String[] arr) {
+		StringBuilder sb = new StringBuilder();
+		for (String s : arr) {
+			if (s != null && !s.isEmpty()) {
+				sb.append(s);
+				if (!s.endsWith("\n")) {
+					sb.append('\n');
+				}
+			}
+		}
+		return sb.toString();
+	}
+}

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

@@ -681,7 +681,7 @@ public class CommitCommand extends GitCommand<RevCommit> {
 	 */
 	public CommitCommand setAll(boolean all) {
 		checkCallable();
-		if (!only.isEmpty())
+		if (all && !only.isEmpty())
 			throw new JGitInternalException(MessageFormat.format(
 					JGitText.get().illegalCombinationOfArguments, "--all", //$NON-NLS-1$
 					"--only")); //$NON-NLS-1$