CML2 rule file is autogenerated from arm.cml and the containers template

Container rules are too many and repetitive for each container. With this
change, the cml file is autogenerated from a container template cml and
the architecture cml, e.g. arm.cml. -c option determines the number of
containers. See build.py -h for more.

scripts/cml/generate_container_cml.py

@@ -0,0 +1,72 @@
+#! /usr/bin/env python2.6
+# -*- mode: python; coding: utf-8; -*-
+#
+#  Codezero -- a microkernel for embedded systems.
+#
+#  Copyright © 2009  B Labs Ltd
+#
+import os, sys, shelve, glob
+from os.path import join
+
+PROJRELROOT = '../../'
+
+sys.path.append(os.path.abspath(os.path.join(os.path.dirname(__file__), PROJRELROOT)))
+sys.path.append(os.path.abspath("../"))
+
+from config.projpaths import *
+from config.configuration import *
+
+containers_menu = \
+'''
+menu containers_menu
+'''
+
+containers_constraint = \
+'''
+unless CONTAINERS > %d suppress cont%d_menu
+'''
+
+containers_default = \
+'''
+default CONTAINERS from %d
+'''
+
+def add_container_constraint(cid):
+    cml_string = ""
+    if cid == 0:
+        return ""
+    cml_string = containers_constraint % (cid, cid)
+    return cml_string
+
+def generate_container_cml(arch, ncont):
+    contid_occurence = 223  # Exact number of arguments
+    fbody = ""
+    with open(join(CML2_CONFIG_SRCDIR, arch + '.cml')) as in_cml:
+        fbody += in_cml.read()
+
+    # Add container visibility constraint
+    for cont in range(ncont):
+        fbody += add_container_constraint(cont)
+
+    # Add number of default containers
+    fbody += containers_default % ncont
+
+    # Generate the containers menu with as many entries as containers
+    fbody += containers_menu
+    for cont in range(ncont):
+        fbody += '\tcont%d_menu\n' % cont
+
+    # Write each container's rules
+    for cont in range(ncont):
+        with open(CML2_CONT_DEFFILE, "rU") as contdefs:
+            defbody = contdefs.read()
+            defbody = defbody.replace("%\n", "%%\n")
+            fbody += defbody % tuple(contid_occurence * [cont])
+
+    # Write the result to output rules file.
+    with open(join(CML2_CONFIG_SRCDIR, "out.cml"), "w+") as out_cml:
+        out_cml.write(fbody)
+
+if __name__ == "__main__":
+    generate_container_cml('arm', 4)
+