Merge branch 'stable-4.8' into stable-4.9

* stable-4.8:
  Prepare 4.7.8-SNAPSHOT builds
  JGit v4.7.7.201812240805-r
  Fix feature versions imported by feature org.eclipse.jgit.pgm
  Prepare 4.5.6-SNAPSHOT builds
  JGit v4.5.5.201812240535-r
  Call AdvertiseRefsHook before validating wants

Change-Id: Ib44e314a68bca2349b45f4937257aa1298c8d74b
Signed-off-by: Jonathan Nieder <jrn@google.com>
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>

org.eclipse.jgit/.settings/.api_filters

diff --git a/org.eclipse.jgit/.settings/.api_filters b/org.eclipse.jgit/.settings/.api_filters
index bf71684..f746d88 100644
--- a/org.eclipse.jgit/.settings/.api_filters
+++ b/org.eclipse.jgit/.settings/.api_filters
@@ -3,7 +3,7 @@
     <resource path="META-INF/MANIFEST.MF">
         <filter id="924844039">
             <message_arguments>
-                <message_argument value="4.9.7"/>
+                <message_argument value="4.9.8"/>
                 <message_argument value="4.9.0"/>
             </message_arguments>
         </filter>

org.eclipse.jgit/src/org/eclipse/jgit/transport/UploadPack.java

diff --git a/org.eclipse.jgit/src/org/eclipse/jgit/transport/UploadPack.java b/org.eclipse.jgit/src/org/eclipse/jgit/transport/UploadPack.java
index cf070c6..63236cb 100644
--- a/org.eclipse.jgit/src/org/eclipse/jgit/transport/UploadPack.java
+++ b/org.eclipse.jgit/src/org/eclipse/jgit/transport/UploadPack.java
@@ -82,7 +82,6 @@
 import org.eclipse.jgit.lib.ObjectId;
 import org.eclipse.jgit.lib.ProgressMonitor;
 import org.eclipse.jgit.lib.Ref;
-import org.eclipse.jgit.lib.RefDatabase;
 import org.eclipse.jgit.lib.Repository;
 import org.eclipse.jgit.revwalk.AsyncRevObjectQueue;
 import org.eclipse.jgit.revwalk.DepthWalk;
@@ -712,8 +711,14 @@ public PackStatistics getStatistics() {
 	}
 
 	private Map<String, Ref> getAdvertisedOrDefaultRefs() throws IOException {
-		if (refs == null)
-			setAdvertisedRefs(db.getRefDatabase().getRefs(RefDatabase.ALL));
+		if (refs != null) {
+			return refs;
+		}
+
+		advertiseRefsHook.advertiseRefs(this);
+		if (refs == null) {
+			setAdvertisedRefs(db.getRefDatabase().getRefs(ALL));
+		}
 		return refs;
 	}
 
@@ -892,15 +897,7 @@ private void verifyClientShallow()
 	 */
 	public void sendAdvertisedRefs(final RefAdvertiser adv) throws IOException,
 			ServiceMayNotContinueException {
-		try {
-			advertiseRefsHook.advertiseRefs(this);
-		} catch (ServiceMayNotContinueException fail) {
-			if (fail.getMessage() != null) {
-				adv.writeOne("ERR " + fail.getMessage()); //$NON-NLS-1$
-				fail.setOutput();
-			}
-			throw fail;
-		}
+		Map<String, Ref> advertisedOrDefaultRefs = getAdvertisedOrDefaultRefs();
 
 		adv.init(db);
 		adv.advertiseCapability(OPTION_INCLUDE_TAG);
@@ -925,7 +922,6 @@ public void sendAdvertisedRefs(final RefAdvertiser adv) throws IOException,
 			adv.advertiseCapability(OPTION_ALLOW_REACHABLE_SHA1_IN_WANT);
 		adv.advertiseCapability(OPTION_AGENT, UserAgent.get());
 		adv.setDerefTags(true);
-		Map<String, Ref> advertisedOrDefaultRefs = getAdvertisedOrDefaultRefs();
 		findSymrefs(adv, advertisedOrDefaultRefs);
 		advertised = adv.send(advertisedOrDefaultRefs);
 		if (adv.isEmpty())