RepositoryModel will use String rather than RefModel to track the current

symbolic head and available heads.

Added convenience methods to JGitUtils to support retrieving available
heads as List<String>.
When resolving the symbolic head target as a String, if the head is
detached, attempt to match the commit SHA1 against the known tags, using
the most recent tag if more than one matches.
Revised error messaging to better reflect actual outcome.
Adjusted tab indexes on edit repository page to include default head combo
box.
Updated message key for default head combo box to use uppercase "HEAD".

1 files changed, 60 insertions, 26 deletions

diff --git a/src/com/gitblit/utils/JGitUtils.java b/src/com/gitblit/utils/JGitUtils.java
index 05c0852c..6470634c 100644
--- a/src/com/gitblit/utils/JGitUtils.java
+++ b/src/com/gitblit/utils/JGitUtils.java
@@ -1156,49 +1156,60 @@ public class JGitUtils {
 	}

 

 	/**

-	 * Returns the default HEAD for a repository. Normally returns the ref HEAD points to, but if HEAD points to nothing

-	 * it returns null.

+	 * Returns the target of the symbolic HEAD reference for a repository.

+	 * Normally returns a branch reference name, but when HEAD is detached,

+	 * the commit is matched against the known tags. The most recent matching

+	 * tag ref name will be returned if it references the HEAD commit. If

+	 * no match is found, the SHA1 is returned.

 	 *

 	 * @param repository

-	 * @return the refmodel for HEAD or null

+	 * @return the ref name or the SHA1 for detached HEADs

 	 */

-	public static RefModel getDefaultHead(Repository repository) {

-		RefModel ref = null;

+	public static String getSymbolicHeadTarget(Repository repository) {

+		String target = null;

 		try {

-			Ref head = repository.getRef(Constants.HEAD);

-			if (head != null) {

-				Ref target = head.getTarget();

-				RevWalk rw = new RevWalk(repository);

-				ObjectId targetId = target.getObjectId();

-				if (targetId != null) {

-					RevObject object = rw.parseAny(targetId);

-					ref = new RefModel(target.getName(), target, object);

+			target = repository.getFullBranch();

+			if (!target.startsWith(Constants.R_HEADS)) {

+				// refers to an actual commit, probably a tag

+				// find latest tag that matches the commit, if any

+				List<RefModel> tagModels = getTags(repository, true, -1);

+				if (tagModels.size() > 0) {

+					RefModel tag = null;

+					Date lastDate = new Date(0);

+					for (RefModel tagModel : tagModels) {

+						if (tagModel.getReferencedObjectId().getName().equals(target) &&

+								tagModel.getDate().after(lastDate)) {

+							tag = tagModel;

+							lastDate = tag.getDate();

+						}

+					}

+					target = tag.getName();

 				}

-				rw.dispose();

 			}

 		} catch (Throwable t) {

-			LOGGER.error("Failed to get default head!", t);

+			error(t, repository, "{0} failed to get symbolic HEAD target");

 		}

-		return ref;

+		return target;

 	}

-

+	

 	/**

-	 * Sets the default HEAD symbolic ref for a repository.

+	 * Sets the HEAD symbolic ref name for a repository. The HEAD will

+	 * be detached if the name does not reference a branch.

 	 *

 	 * @param repository

-	 * @param ref

+	 * @param name

 	 */

-	public static void setDefaultHead(Repository repository, Ref ref) {

+	public static void setSymbolicHeadTarget(Repository repository, String name) {

 		try {

-			boolean detach = !ref.getName().startsWith(Constants.R_HEADS); // detach if not a branch

+			boolean detach = !name.startsWith(Constants.R_HEADS); // detach if not a branch

 			RefUpdate.Result result;

 			RefUpdate head = repository.updateRef(Constants.HEAD, detach);

 			if (detach) { // Tag

-				RevCommit commit = getCommit(repository, ref.getObjectId().getName());

+				RevCommit commit = getCommit(repository, name);

 				head.setNewObjectId(commit.getId());

 				result = head.forceUpdate();

 			} else {

-				result = head.link(ref.getName());

+				result = head.link(name);

 			}

 			switch (result) {

 			case NEW:

@@ -1207,12 +1218,35 @@ public class JGitUtils {
 			case FAST_FORWARD:

 				break;

 			default:

-				LOGGER.error(MessageFormat.format("{0} failed to set default head to {1} ({2})",

-						repository.getDirectory().getAbsolutePath(), ref.getName(), result));

+				LOGGER.error(MessageFormat.format("{0} symbolic HEAD update to {1} returned result {2}",

+						repository.getDirectory().getAbsolutePath(), name, result));

 			}

 		} catch (Throwable t) {

-			error(t, repository, "{0} failed to set default head to {1}", ref.getName());

+			error(t, repository, "{0} failed to set symbolic HEAD to {1}", name);

+		}

+	}

+	

+	/**

+	 * Get the full branch and tag ref names for any potential symbolic head targets.

+	 *

+	 * @param repository

+	 * @return a list of ref names

+	 */

+	public static List<String> getAvailableHeadTargets(Repository repository) {

+		List<String> targets = new ArrayList<String>();

+		List<RefModel> branchModels = JGitUtils.getLocalBranches(repository, true, -1);

+		if (branchModels.size() > 0) {

+			for (RefModel branchModel : branchModels) {

+				targets.add(branchModel.getName());

+			}

+		}

+		List<RefModel> tagModels = JGitUtils.getTags(repository, true, -1);

+		if (tagModels.size() > 0) {

+			for (RefModel tagModel : tagModels) {

+				targets.add(tagModel.getName());

+			}

 		}

+		return targets;

 	}

 

 	/**