Implement bang executable.

setup.py

@@ -55,6 +55,7 @@ setup(name=name,
           'slapgrid-supervisorctl = slapos.grid.svcbackend:supervisorctl',
           'slapgrid-supervisord = slapos.grid.svcbackend:supervisord',
           'slapproxy = slapos.proxy:main',
+          'bang = slapos.bang:main',
         ]
       },
       test_suite="slapos.tests",

slapos/bang.py

+##############################################################################
+#
+# Copyright (c) 2011 Vifib SARL and Contributors. All Rights Reserved.
+#
+# WARNING: This program as such is intended to be used by professional
+# programmers who take the whole responsibility of assessing all potential
+# consequences resulting from its eventual inadequacies and bugs
+# End users who are looking for a ready-to-use solution with commercial
+# guarantees and support are strongly adviced to contract a Free Software
+# Service Company
+#
+# This program is Free Software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; either version 3
+# of the License, or (at your option) any later version.
+#
+# 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+#
+##############################################################################
+
+import slapos.slap.slap
+import argparse
+import ConfigParser
+
+def main(*args):
+  parser = argparse.ArgumentParser()
+  parser.add_argument("-m", "--message", help="Message for bang.")
+  parser.add_argument("configuration_file", nargs=1, type=argparse.FileType(),
+      help="SlapOS configuration file.")
+  if len(args) == 0:
+    argument = parser.parse_args()
+  else:
+    argument = parser.parse_args(list(args))
+  configuration_file = argument.configuration_file[0]
+  message = argument.message
+  # Loads config (if config specified)
+  configuration = ConfigParser.SafeConfigParser()
+  configuration.readfp(configuration_file)
+  computer_id = configuration.get('slapos', 'computer_id')
+  master_url = configuration.get('slapos', 'master_url')
+  if configuration.has_option('slapos', 'key_file'):
+    key_file = configuration.get('slapos', 'key_file')
+  else:
+    key_file = None
+  if configuration.has_option('slapos', 'cert_file'):
+    cert_file = configuration.get('slapos', 'cert_file')
+  else:
+    cert_file = None
+  slap = slapos.slap.slap()
+  slap.initializeConnection(master_url, key_file=key_file, cert_file=cert_file)
+  computer = slap.registerComputer(computer_id)
+  computer.bang(message)