Created Bootstrapper to handle Nova bootstrapping logic.

1 files changed, 37 insertions, 0 deletions

diff --git a/nova/utils.py b/nova/utils.py
index a9b0f3128..a6b8d4cbe 100644
--- a/nova/utils.py
+++ b/nova/utils.py
@@ -743,3 +743,40 @@ def is_uuid_like(val):
     if not isinstance(val, basestring):
         return False
     return (len(val) == 36) and (val.count('-') == 4)
+
+
+class Bootstrapper(object):
+    """Provides environment bootstrapping capabilities for entry points."""
+
+    @staticmethod
+    def bootstrap_binary(argv):
+        """Initialize the Nova environment using command line arguments."""
+        Bootstrapper.setup_flags(argv)
+        Bootstrapper.setup_logging()
+        Bootstrapper.log_flags()
+
+    @staticmethod
+    def setup_logging():
+        """Initialize logging and log a message indicating the Nova version."""
+        logging.setup()
+        logging.audit(_("Nova Version (%s)") %
+                        version.version_string_with_vcs())
+
+    @staticmethod
+    def setup_flags(input_flags):
+        """Initialize flags, load flag file, and print help if needed."""
+        default_flagfile(args=input_flags)
+        FLAGS(input_flags or [])
+        flags.DEFINE_flag(flags.HelpFlag())
+        flags.DEFINE_flag(flags.HelpshortFlag())
+        flags.DEFINE_flag(flags.HelpXMLFlag())
+        FLAGS.ParseNewFlags()
+
+    @staticmethod
+    def log_flags():
+        """Log the list of all active flags being used."""
+        logging.audit(_("Currently active flags:"))
+        for key in FLAGS:
+            value = FLAGS.get(key, None)
+            logging.audit(_("%(key)s : %(value)s" % locals()))
+