diff --git a/lib/bb/command.py b/lib/bb/command.py
index 73aaca0..fd8912a 100644
--- a/lib/bb/command.py
+++ b/lib/bb/command.py
@@ -179,6 +179,13 @@ class CommandsSync:
         """
         return bb.utils.cpu_count()
 
+    def setConfFilter(self, command, params):
+        """
+        Set the configuration file parsing filter
+        """
+        filterfunc = params[0]
+        bb.parse.parse_py.ConfHandler.confFilters.append(filterfunc)
+
 class CommandsAsync:
     """
     A class of asynchronous commands
diff --git a/lib/bb/parse/parse_py/ConfHandler.py b/lib/bb/parse/parse_py/ConfHandler.py
index fa811f3..f108c24 100644
--- a/lib/bb/parse/parse_py/ConfHandler.py
+++ b/lib/bb/parse/parse_py/ConfHandler.py
@@ -71,6 +71,8 @@ def include(oldfn, fn, lineno, data, error_out):
             raise ParseError("Could not %(error_out)s file %(fn)s" % vars(), oldfn, lineno)
         logger.debug(2, "CONF file '%s' not found", fn)
 
+confFilters = []
+
 def handle(fn, data, include):
     init(data)
 
@@ -107,6 +109,9 @@ def handle(fn, data, include):
     if oldfile:
         data.setVar('FILE', oldfile)
 
+    for f in confFilters:
+        f(fn, data)
+
     return data
 
 def feeder(lineno, s, fn, statements):