Add a public RevCommit.parse() method

Callers might have a canonical commit encoding on hand that they
wish to convert into a clean structure for presentation purposes,
and the object may not be available in a repository.  (E.g. maybe
its a "draft" commit being written in an editor.)

Change-Id: I21759cff337cbbb34dbdde91aec5aa4448a1ef37
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>

1 files changed, 21 insertions, 0 deletions

diff --git a/org.eclipse.jgit.test/tst/org/eclipse/jgit/revwalk/RevCommitParseTest.java b/org.eclipse.jgit.test/tst/org/eclipse/jgit/revwalk/RevCommitParseTest.java
index b7e84419c9..9354373379 100644
--- a/org.eclipse.jgit.test/tst/org/eclipse/jgit/revwalk/RevCommitParseTest.java
+++ b/org.eclipse.jgit.test/tst/org/eclipse/jgit/revwalk/RevCommitParseTest.java
@@ -44,9 +44,12 @@
 package org.eclipse.jgit.revwalk;
 
 import java.io.ByteArrayOutputStream;
+import java.io.UnsupportedEncodingException;
 
+import org.eclipse.jgit.lib.Commit;
 import org.eclipse.jgit.lib.Constants;
 import org.eclipse.jgit.lib.ObjectId;
+import org.eclipse.jgit.lib.ObjectInserter;
 import org.eclipse.jgit.lib.PersonIdent;
 import org.eclipse.jgit.lib.RepositoryTestCase;
 
@@ -315,6 +318,24 @@ public class RevCommitParseTest extends RepositoryTestCase {
 		assertEquals(shortMsg, c.getShortMessage());
 	}
 
+	public void testParse_PublicParseMethod()
+			throws UnsupportedEncodingException {
+		ObjectInserter.Formatter fmt = new ObjectInserter.Formatter();
+		Commit src = new Commit();
+		src.setTreeId(fmt.idFor(Constants.OBJ_TREE, new byte[] {}));
+		src.setAuthor(author);
+		src.setCommitter(committer);
+		src.setMessage("Test commit\n\nThis is a test.\n");
+
+		RevCommit p = RevCommit.parse(fmt.format(src));
+		assertEquals(src.getTreeId(), p.getTree());
+		assertEquals(0, p.getParentCount());
+		assertEquals(author, p.getAuthorIdent());
+		assertEquals(committer, p.getCommitterIdent());
+		assertEquals("Test commit", p.getShortMessage());
+		assertEquals(src.getMessage(), p.getFullMessage());
+	}
+
 	private static ObjectId id(final String str) {
 		return ObjectId.fromString(str);
 	}