bitbake: event/ast: Add RecipeTaskPreProcess event before task finalisation

There are various pieces of code which need to run after the tasks are
finalised but before bitbake locks in on the task dependencies. This
adds such an event so dependency changes in anonymous python can
be accounted for and acted upon by these specific event handlers.

(Bitbake rev: 4dcd0e53f5ff4bf4f2d6cbdc51ff33a5f5f206af)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/lib/bb/event.py

@@ -361,6 +361,17 @@ class RecipeEvent(Event):
 class RecipePreFinalise(RecipeEvent):
     """ Recipe Parsing Complete but not yet finialised"""
 
+class RecipeTaskPreProcess(RecipeEvent):
+    """
+    Recipe Tasks about to be finalised
+    The list of tasks should be final at this point and handlers
+    are only able to change interdependencies
+    """
+    def __init__(self, fn, tasklist):
+        self.fn = fn
+        self.tasklist = tasklist
+        Event.__init__(self)
+
 class RecipeParsed(RecipeEvent):
     """ Recipe Parsing Complete """
 

bitbake/lib/bb/parse/ast.py

@@ -358,6 +358,7 @@ def finalize(fn, d, variant = None):
     bb.data.update_data(d)
 
     tasklist = d.getVar('__BBTASKS', False) or []
+    bb.event.fire(bb.event.RecipeTaskPreProcess(fn, list(tasklist)), d)
     bb.build.add_tasks(tasklist, d)
 
     bb.parse.siggen.finalise(fn, d, variant)