private void verifyPrerequisites()
{
if (prereqs.isEmpty())
{
return;
}
using (RevWalk.RevWalk rw = new RevWalk.RevWalk(transport.Local))
{
RevFlag PREREQ = rw.newFlag("PREREQ");
RevFlag SEEN = rw.newFlag("SEEN");
List <ObjectId> missing = new List <ObjectId>();
List <RevObject> commits = new List <RevObject>();
foreach (ObjectId p in prereqs)
{
try
{
RevCommit c = rw.parseCommit(p);
if (!c.has(PREREQ))
{
c.add(PREREQ);
commits.Add(c);
}
}
catch (MissingObjectException)
{
missing.Add(p);
}
catch (IOException err)
{
throw new TransportException(transport.Uri, "Cannot Read commit " + p.Name, err);
}
}
if (!missing.isEmpty())
{
throw new MissingBundlePrerequisiteException(transport.Uri, missing);
}
foreach (Ref r in transport.Local.getAllRefs().Values)
{
try
{
rw.markStart(rw.parseCommit(r.ObjectId));
}
catch (IOException)
{
}
}
int remaining = commits.Count;
try
{
RevCommit c;
while ((c = rw.next()) != null)
{
if (c.has(PREREQ))
{
c.add(SEEN);
if (--remaining == 0)
{
break;
}
}
}
}
catch (IOException err)
{
throw new TransportException(transport.Uri, "Cannot Read object", err);
}
if (remaining > 0)
{
foreach (RevObject o in commits)
{
if (!o.has(SEEN))
{
missing.Add(o);
}
}
throw new MissingBundlePrerequisiteException(transport.Uri, missing);
}
}
}