Early classloading improvements

- Changed launcher to already load zinc
- use code generation to generate necessary dependencies
- changed resolver to linearize dependency DAG in a way that guarantees that every transitive dependee of a node in the DAG is a transitive dependee of that node in the linear sequence
- move exit code trapping code into java so it can be used for zinc early

There seems to be a bug in this version, where CBT crashes about half of the time with a "object is not an instance of declaring class" Exception during running the task from the build object via reflection.

1 files changed, 1 insertions, 1 deletions

diff --git a/cbt b/cbt
index 372c145..5224744 100755
--- a/cbt
+++ b/cbt
@@ -141,7 +141,7 @@ stage1 () {
 	done
 	compiles=0
 	if [ $changed -eq 1 ]; then
-		rm $NAILGUN$TARGET/cbt/*.class 2>/dev/null # defensive delete of potentially broken class files
+		#rm $NAILGUN$TARGET/cbt/*.class 2>/dev/null # defensive delete of potentially broken class files
 		echo "Compiling cbt/nailgun_launcher" 1>&2
 		javac -Xlint:deprecation -Xlint:unchecked -d $NAILGUN$TARGET `ls $NAILGUN*.java`
 		compiles=$?