pgm: Handle exceptions in Branch command

This avoids we show a stacktrace on the console by default when one of
the expected exceptions is thrown during the run method is executed.

Change-Id: Ib07cc8dd26b45b62de1d77739380eb36833082f1
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>

org.eclipse.jgit.pgm/src/org/eclipse/jgit/pgm/Branch.java

@@ -54,6 +54,7 @@ import java.util.Map.Entry;
 import org.eclipse.jgit.api.Git;
 import org.eclipse.jgit.api.ListBranchCommand;
 import org.eclipse.jgit.api.ListBranchCommand.ListMode;
+import org.eclipse.jgit.api.errors.GitAPIException;
 import org.eclipse.jgit.lib.Constants;
 import org.eclipse.jgit.lib.ObjectId;
 import org.eclipse.jgit.lib.ObjectReader;
@@ -182,7 +183,8 @@ class Branch extends TextBuiltin {
 
 	/** {@inheritDoc} */
 	@Override
-	protected void run() throws Exception {
+	protected void run() {
+		try {
 			if (delete != null || deleteForce != null) {
 				if (delete != null) {
 					delete(delete, false);
@@ -190,7 +192,8 @@ class Branch extends TextBuiltin {
 				if (deleteForce != null) {
 					delete(deleteForce, true);
 				}
-		} else {
+				return;
+			}
 			if (rename) {
 				String src, dst;
 				if (otherBranch == null) {
@@ -264,10 +267,12 @@ class Branch extends TextBuiltin {
 				}
 				list();
 			}
+		} catch (IOException | GitAPIException e) {
+			throw die(e.getMessage(), e);
 		}
 	}
 
-	private void list() throws Exception {
+	private void list() throws IOException, GitAPIException {
 		Ref head = db.exactRef(Constants.HEAD);
 		// This can happen if HEAD is stillborn
 		if (head != null) {
@@ -316,7 +321,7 @@ class Branch extends TextBuiltin {
 	}
 
 	private void printHead(final ObjectReader reader, final String ref,
-			final boolean isCurrent, final Ref refObj) throws Exception {
+			final boolean isCurrent, final Ref refObj) throws IOException {
 		outw.print(isCurrent ? '*' : ' ');
 		outw.print(' ');
 		outw.print(ref);