Add "all" parameter to the commit Command

When the add parameter is set all modified and deleted files
are staged prior to commit.

Change-Id: Id23bc25730fcdd151386cd495a7cdc0935cbc00b
Signed-off-by: Stefan Lay <stefan.lay@sap.com>

org.eclipse.jgit.test/tst/org/eclipse/jgit/api/CommitAndLogCommandTests.java

@@ -45,6 +45,7 @@ package org.eclipse.jgit.api;
 import java.io.File;
 import java.io.FileWriter;
 import java.io.IOException;
+import java.io.PrintWriter;
 
 import org.eclipse.jgit.errors.UnmergedPathException;
 import org.eclipse.jgit.lib.Constants;
@@ -53,6 +54,7 @@ import org.eclipse.jgit.lib.PersonIdent;
 import org.eclipse.jgit.lib.RefUpdate;
 import org.eclipse.jgit.lib.RepositoryTestCase;
 import org.eclipse.jgit.revwalk.RevCommit;
+import org.eclipse.jgit.treewalk.TreeWalk;
 
 public class CommitAndLogCommandTests extends RepositoryTestCase {
 	public void testSomeCommits() throws NoHeadException, NoMessageException,
@@ -151,4 +153,36 @@ public class CommitAndLogCommandTests extends RepositoryTestCase {
 		assertEquals(parents[1], second);
 		assertTrue(parents.length==2);
 	}
+
+	public void testAddUnstagedChanges() throws IOException, NoHeadException,
+			NoMessageException, ConcurrentRefUpdateException,
+			JGitInternalException, WrongRepositoryStateException,
+			NoFilepatternException {
+		File file = new File(db.getWorkTree(), "a.txt");
+		file.createNewFile();
+		PrintWriter writer = new PrintWriter(file);
+		writer.print("content");
+		writer.close();
+
+		Git git = new Git(db);
+		git.add().addFilepattern("a.txt").call();
+		RevCommit commit = git.commit().setMessage("initial commit").call();
+		TreeWalk tw = TreeWalk.forPath(db, "a.txt", commit.getTree());
+		assertEquals("6b584e8ece562ebffc15d38808cd6b98fc3d97ea",
+				tw.getObjectId(0).getName());
+
+		writer = new PrintWriter(file);
+		writer.print("content2");
+		writer.close();
+		commit = git.commit().setMessage("second commit").call();
+		tw = TreeWalk.forPath(db, "a.txt", commit.getTree());
+		assertEquals("6b584e8ece562ebffc15d38808cd6b98fc3d97ea",
+				tw.getObjectId(0).getName());
+
+		commit = git.commit().setAll(true).setMessage("third commit")
+				.setAll(true).call();
+		tw = TreeWalk.forPath(db, "a.txt", commit.getTree());
+		assertEquals("db00fd65b218578127ea51f3dffac701f12f486a",
+				tw.getObjectId(0).getName());
+	}
 }

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

@@ -79,6 +79,8 @@ public class CommitCommand extends GitCommand<RevCommit> {
 
 	private String message;
 
+	private boolean all;
+
 	/**
 	 * parents this commit should have. The current HEAD will be in this list
 	 * and also all commits mentioned in .git/MERGE_HEAD
@@ -127,6 +129,18 @@ public class CommitCommand extends GitCommand<RevCommit> {
 		processOptions(state);
 
 		try {
+			if (all && !repo.isBare() && repo.getWorkTree() != null) {
+				Git git = new Git(repo);
+				try {
+					git.add()
+							.addFilepattern(".")
+							.setUpdate(true).call();
+				} catch (NoFilepatternException e) {
+					// should really not happen
+					throw new JGitInternalException(e.getMessage(), e);
+				}
+			}
+
 			Ref head = repo.getRef(Constants.HEAD);
 			if (head == null)
 				throw new NoHeadException(
@@ -353,4 +367,19 @@ public class CommitCommand extends GitCommand<RevCommit> {
 	public PersonIdent getAuthor() {
 		return author;
 	}
+
+	/**
+	 * If set to true the Commit command automatically stages files that have
+	 * been modified and deleted, but new files you not known by the repository
+	 * are not affected. This corresponds to the parameter -a on the command
+	 * line.
+	 *
+	 * @param all
+	 * @return {@code this}
+	 */
+	public CommitCommand setAll(boolean all) {
+		this.all = all;
+		return this;
+	}
+
 }