Merge "Added MERGING_RESOLVED repository state"

org.eclipse.jgit.test/tst/org/eclipse/jgit/dircache/DirCacheBasicTest.java

@@ -186,10 +186,30 @@ public class DirCacheBasicTest extends RepositoryTestCase {
 		for (int i = 0; i < ents.length; i++)
 			b.add(ents[i]);
 		b.finish();
+		assertFalse(dc.hasUnmergedPaths());
 
 		assertEquals(paths.length, dc.getEntryCount());
 		dc.clear();
 		assertEquals(0, dc.getEntryCount());
+		assertFalse(dc.hasUnmergedPaths());
+	}
+
+	public void testDetectUnmergedPaths() throws Exception {
+		final DirCache dc = DirCache.read(db);
+		final DirCacheEntry[] ents = new DirCacheEntry[3];
+
+		ents[0] = new DirCacheEntry("a", 1);
+		ents[0].setFileMode(FileMode.REGULAR_FILE);
+		ents[1] = new DirCacheEntry("a", 2);
+		ents[1].setFileMode(FileMode.REGULAR_FILE);
+		ents[2] = new DirCacheEntry("a", 3);
+		ents[2].setFileMode(FileMode.REGULAR_FILE);
+
+		final DirCacheBuilder b = dc.builder();
+		for (int i = 0; i < ents.length; i++)
+			b.add(ents[i]);
+		b.finish();
+		assertTrue(dc.hasUnmergedPaths());
 	}
 
 	public void testFindOnEmpty() throws Exception {

org.eclipse.jgit/src/org/eclipse/jgit/dircache/DirCache.java

@@ -784,4 +784,20 @@ public class DirCache {
 			throws UnmergedPathException, IOException {
 		return getCacheTree(true).writeTree(sortedEntries, 0, 0, ow);
 	}
+
+	/**
+	 * Tells whether this index contains unmerged paths.
+	 *
+	 * @return {@code true} if this index contains unmerged paths. Means: at
+	 *         least one entry is of a stage different from 0. {@code false}
+	 *         will be returned if all entries are of stage 0.
+	 */
+	public boolean hasUnmergedPaths() {
+		for (int i = 0; i < entryCnt; i++) {
+			if (sortedEntries[i].getStage() > 0) {
+				return true;
+			}
+		}
+		return false;
+	}
 }

org.eclipse.jgit/src/org/eclipse/jgit/lib/Repository.java

@@ -60,6 +60,7 @@ import java.util.Set;
 import java.util.Vector;
 import java.util.concurrent.atomic.AtomicInteger;
 
+import org.eclipse.jgit.dircache.DirCache;
 import org.eclipse.jgit.errors.ConfigInvalidException;
 import org.eclipse.jgit.errors.IncorrectObjectTypeException;
 import org.eclipse.jgit.errors.RevisionSyntaxException;
@@ -1117,8 +1118,22 @@ public class Repository {
 			return RepositoryState.REBASING_MERGE;
 
 		// Both versions
-		if (new File(gitDir,"MERGE_HEAD").exists())
+		if (new File(gitDir, "MERGE_HEAD").exists()) {
+			// we are merging - now check whether we have unmerged paths
+			try {
+				if (!DirCache.read(this).hasUnmergedPaths()) {
+					// no unmerged paths -> return the MERGING_RESOLVED state
+					return RepositoryState.MERGING_RESOLVED;
+				}
+			} catch (IOException e) {
+				// Can't decide whether unmerged paths exists. Return
+				// MERGING state to be on the safe side (in state MERGING
+				// you are not allow to do anything)
+				e.printStackTrace();
+			}
 			return RepositoryState.MERGING;
+		}
+
 		if (new File(gitDir,"BISECT_LOG").exists())
 			return RepositoryState.BISECTING;
 

org.eclipse.jgit/src/org/eclipse/jgit/lib/RepositoryState.java

@@ -73,6 +73,17 @@ public enum RepositoryState {
 		public String getDescription() { return "Conflicts"; }
 	},
 
+	/**
+	 * An merge where all conflicts have been resolved. The index does not
+	 * contain any unmerged paths.
+	 */
+	MERGING_RESOLVED {
+		public boolean canCheckout() { return true; }
+		public boolean canResetHead() { return true; }
+		public boolean canCommit() { return true; }
+		public String getDescription() { return "Merged"; }
+	},
+
 	/**
 	 * An unfinished rebase or am. Must resolve, skip or abort before normal work can take place
 	 */