--- a/treepkg/packager.py	Mon May 26 15:01:00 2008 +0000
+++ b/treepkg/packager.py	Tue May 27 13:12:12 2008 +0000
@@ -28,18 +28,26 @@
         return os.path.join(self.base_dir, relative_dir)
     return property(get)
 
+def _fromparent(attr):
+    """Creates a property that delegates its value to self.parent.<attr>"""
+    def get(self):
+        return getattr(self.parent, attr)
+    return property(get)
+
 
 class SourcePackager(object):
 
     # Derived classes must supply the package basename
     pkg_basename = None
 
-    def __init__(self, track, status, work_dir, src_dir, revision):
-        self.track = track
-        self.status = status
-        self.work_dir = work_dir
-        self.src_dir = src_dir
-        self.revision = revision
+    track = _fromparent("track")
+    revision = _fromparent("revision")
+    status = _fromparent("status")
+    work_dir = _fromparent("work_dir")
+    src_dir = _fromparent("src_dir")
+
+    def __init__(self, parent):
+        self.parent = parent
         assert(self.pkg_basename)
 
     def determine_package_version(self, directory):
@@ -179,10 +187,12 @@
 
 class BinaryPackager(object):
 
-    def __init__(self, track, status, binary_dir, dsc_file, logfile):
-        self.track = track
-        self.status = status
-        self.binary_dir = binary_dir
+    track = _fromparent("track")
+    status = _fromparent("status")
+    binary_dir = _fromparent("binary_dir")
+
+    def __init__(self, parent, dsc_file, logfile):
+        self.parent = parent
         self.dsc_file = dsc_file
         self.logfile = logfile
 
@@ -238,17 +248,14 @@
         try:
             util.ensure_directory(self.work_dir)
             self.status.start = datetime.datetime.utcnow()
-            src_packager = self.source_packager_cls(self.track, self.status,
-                                                    self.work_dir, self.src_dir,
-                                                    self.revision)
+            src_packager = self.source_packager_cls(self)
             src_packager.package()
 
             dsc_file = self.find_dsc_file()
             if dsc_file is None:
                 raise RuntimeError("Cannot find dsc File in %r" % self.src_dir)
 
-            bin_packager = self.binary_packager_cls(self.track, self.status,
-                                                    self.binary_dir, dsc_file,
+            bin_packager = self.binary_packager_cls(self, dsc_file,
                                                     self.build_log)
             bin_packager.package()
             self.status.stop = datetime.datetime.utcnow()