From 2f1c776719cf3817a118ab930547e46301fad738 Mon Sep 17 00:00:00 2001
From: James Moger <james.moger@gitblit.com>
Date: Wed, 16 Nov 2011 22:39:28 -0500
Subject: [PATCH] New JGit utility function to retrieve commits since a
 specific date

---
 src/com/gitblit/utils/JGitUtils.java       | 40 ++++++++++++++++++++++
 tests/com/gitblit/tests/JGitUtilsTest.java | 13 ++++---
 2 files changed, 49 insertions(+), 4 deletions(-)

diff --git a/src/com/gitblit/utils/JGitUtils.java b/src/com/gitblit/utils/JGitUtils.java
index c61b3d9f..99c2d0a8 100644
--- a/src/com/gitblit/utils/JGitUtils.java
+++ b/src/com/gitblit/utils/JGitUtils.java
@@ -62,6 +62,7 @@ import org.eclipse.jgit.revwalk.RevObject;
 import org.eclipse.jgit.revwalk.RevSort;
 import org.eclipse.jgit.revwalk.RevTree;
 import org.eclipse.jgit.revwalk.RevWalk;
+import org.eclipse.jgit.revwalk.filter.CommitTimeRevFilter;
 import org.eclipse.jgit.revwalk.filter.RevFilter;
 import org.eclipse.jgit.storage.file.FileRepository;
 import org.eclipse.jgit.transport.CredentialsProvider;
@@ -823,6 +824,45 @@ public class JGitUtils {
 		return "missing";
 	}
 
+	/**
+	 * Returns a list of commits since the minimum date starting from the
+	 * specified object id.
+	 * 
+	 * @param repository
+	 * @param objectId
+	 *            if unspecified, HEAD is assumed.
+	 * @param minimumDate
+	 * @return list of commits
+	 */
+	public static List<RevCommit> getRevLog(Repository repository, String objectId, Date minimumDate) {
+		List<RevCommit> list = new ArrayList<RevCommit>();
+		if (!hasCommits(repository)) {
+			return list;
+		}
+		try {
+			// resolve branch
+			ObjectId branchObject;
+			if (StringUtils.isEmpty(objectId)) {
+				branchObject = getDefaultBranch(repository);
+			} else {
+				branchObject = repository.resolve(objectId);
+			}
+
+			RevWalk rw = new RevWalk(repository);
+			rw.markStart(rw.parseCommit(branchObject));
+			rw.setRevFilter(CommitTimeRevFilter.after(minimumDate));
+			Iterable<RevCommit> revlog = rw;
+			for (RevCommit rev : revlog) {
+				list.add(rev);
+			}
+			rw.dispose();
+		} catch (Throwable t) {
+			error(t, repository, "{0} failed to get {1} revlog for minimum date {2}", objectId,
+					minimumDate);
+		}
+		return list;
+	}
+
 	/**
 	 * Returns a list of commits starting from HEAD and working backwards.
 	 * 
diff --git a/tests/com/gitblit/tests/JGitUtilsTest.java b/tests/com/gitblit/tests/JGitUtilsTest.java
index 594d090d..7cd79adc 100644
--- a/tests/com/gitblit/tests/JGitUtilsTest.java
+++ b/tests/com/gitblit/tests/JGitUtilsTest.java
@@ -17,6 +17,7 @@ package com.gitblit.tests;
 
 import java.io.File;
 import java.io.FileOutputStream;
+import java.text.SimpleDateFormat;
 import java.util.Arrays;
 import java.util.Date;
 import java.util.List;
@@ -287,20 +288,24 @@ public class JGitUtilsTest extends TestCase {
 	public void testRevlog() throws Exception {
 		assertTrue(JGitUtils.getRevLog(null, 0).size() == 0);
 		List<RevCommit> commits = JGitUtils.getRevLog(null, 10);
-		assertTrue(commits.size() == 0);
+		assertEquals(0, commits.size());
 
 		Repository repository = GitBlitSuite.getHelloworldRepository();
 		// get most recent 10 commits
 		commits = JGitUtils.getRevLog(repository, 10);
-		assertTrue(commits.size() == 10);
+		assertEquals(10, commits.size());
 
 		// test paging and offset by getting the 10th most recent commit
 		RevCommit lastCommit = JGitUtils.getRevLog(repository, null, 9, 1).get(0);
-		assertTrue(commits.get(9).equals(lastCommit));
+		assertEquals(lastCommit, commits.get(9));
 
 		// grab the two most recent commits to java.java
 		commits = JGitUtils.getRevLog(repository, null, "java.java", 0, 2);
-		assertTrue(commits.size() == 2);
+		assertEquals(2, commits.size());
+		
+		// grab the commits since 2008-07-15
+		commits = JGitUtils.getRevLog(repository, null, new SimpleDateFormat("yyyy-MM-dd").parse("2008-07-15"));
+		assertEquals(12, commits.size());
 		repository.close();
 	}
 
-- 
2.39.5