Add path filtering to LogCommand

Bug: 340049
Change-Id: I825b93b3412a3041aca225962fc8463a8f180650
Signed-off-by: Chris Aniszczyk <caniszczyk@gmail.com>

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

@@ -44,6 +44,8 @@ package org.eclipse.jgit.api;
 
 import java.io.IOException;
 import java.text.MessageFormat;
+import java.util.ArrayList;
+import java.util.List;
 
 import org.eclipse.jgit.JGitText;
 import org.eclipse.jgit.api.errors.JGitInternalException;
@@ -56,6 +58,8 @@ import org.eclipse.jgit.lib.ObjectId;
 import org.eclipse.jgit.lib.Repository;
 import org.eclipse.jgit.revwalk.RevCommit;
 import org.eclipse.jgit.revwalk.RevWalk;
+import org.eclipse.jgit.treewalk.filter.PathFilter;
+import org.eclipse.jgit.treewalk.filter.PathFilterGroup;
 
 /**
  * A class used to execute a {@code Log} command. It has setters for all
@@ -76,6 +80,8 @@ public class LogCommand extends GitCommand<Iterable<RevCommit>> {
 
 	private boolean startSpecified = false;
 
+	private final List<PathFilter> pathFilters = new ArrayList<PathFilter>();
+
 	/**
 	 * @param repo
 	 */
@@ -96,6 +102,8 @@ public class LogCommand extends GitCommand<Iterable<RevCommit>> {
 	public Iterable<RevCommit> call() throws NoHeadException,
 			JGitInternalException {
 		checkCallable();
+		if (pathFilters.size() > 0)
+			walk.setTreeFilter(PathFilterGroup.create(pathFilters));
 		if (!startSpecified) {
 			try {
 				ObjectId headId = repo.resolve(Constants.HEAD);
@@ -202,6 +210,21 @@ public class LogCommand extends GitCommand<Iterable<RevCommit>> {
 		return not(since).add(until);
 	}
 
+	/**
+	 * Show only commits that affect any of the specified paths. The path must
+	 * either name a file or a directory exactly. Note that regex expressions or
+	 * wildcards are not supported.
+	 *
+	 * @param path
+	 *            a path is relative to the top level of the repository
+	 * @return {@code this}
+	 */
+	public LogCommand addPath(String path) {
+		checkCallable();
+		pathFilters.add(PathFilter.create(path));
+		return this;
+	}
+
 	private LogCommand add(boolean include, AnyObjectId start)
 			throws MissingObjectException, IncorrectObjectTypeException,
 			JGitInternalException {