Add bitbake-dev to allow ease of testing and development of bitbake trunk

git-svn-id: https://svn.o-hand.com/repos/poky/trunk@5337 311d38ba-8fff-0310-9ca6-ca027cbcb966

bitbake-dev/lib/bb/methodpool.py

@@ -0,0 +1,84 @@
+# ex:ts=4:sw=4:sts=4:et
+# -*- tab-width: 4; c-basic-offset: 4; indent-tabs-mode: nil -*-
+#
+#
+# Copyright (C)       2006 Holger Hans Peter Freyther
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License version 2 as
+# published by the Free Software Foundation.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License along
+# with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+
+
+"""
+    What is a method pool?
+
+    BitBake has a global method scope where .bb, .inc and .bbclass
+    files can install methods. These methods are parsed from strings.
+    To avoid recompiling and executing these string we introduce
+    a method pool to do this task.
+
+    This pool will be used to compile and execute the functions. It
+    will be smart enough to 
+"""
+
+from bb.utils import better_compile, better_exec
+from bb       import error
+
+# A dict of modules we have handled
+# it is the number of .bbclasses + x in size
+_parsed_methods = { }
+_parsed_fns     = { }
+
+def insert_method(modulename, code, fn):
+    """
+    Add code of a module should be added. The methods
+    will be simply added, no checking will be done
+    """
+    comp = better_compile(code, "<bb>", fn )
+    better_exec(comp, __builtins__, code, fn)
+
+    # now some instrumentation
+    code = comp.co_names
+    for name in code:
+        if name in ['None', 'False']:
+            continue
+        elif name in _parsed_fns and not _parsed_fns[name] == modulename:
+            error( "Error Method already seen: %s in' %s' now in '%s'" % (name, _parsed_fns[name], modulename))
+        else:
+            _parsed_fns[name] = modulename
+
+def check_insert_method(modulename, code, fn):
+    """
+    Add the code if it wasnt added before. The module
+    name will be used for that 
+
+    Variables:
+        @modulename a short name e.g. base.bbclass
+        @code The actual python code
+        @fn   The filename from the outer file
+    """
+    if not modulename in _parsed_methods:
+        return insert_method(modulename, code, fn)
+    _parsed_methods[modulename] = 1
+
+def parsed_module(modulename):
+    """
+    Inform me file xyz was parsed
+    """
+    return modulename in _parsed_methods
+
+
+def get_parsed_dict():
+    """
+    shortcut
+    """
+    return _parsed_methods