diff --git a/hooks/charmhelpers/__init__.py b/hooks/charmhelpers/__init__.py
index b46e2e23..f72e7f84 100644
--- a/hooks/charmhelpers/__init__.py
+++ b/hooks/charmhelpers/__init__.py
@@ -1,3 +1,19 @@
+# Copyright 2014-2015 Canonical Limited.
+#
+# This file is part of charm-helpers.
+#
+# charm-helpers is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License version 3 as
+# published by the Free Software Foundation.
+#
+# charm-helpers 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 Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+
 # Bootstrap charm-helpers, installing its dependencies if necessary using
 # only standard libraries.
 import subprocess
diff --git a/hooks/charmhelpers/contrib/__init__.py b/hooks/charmhelpers/contrib/__init__.py
index e69de29b..d1400a02 100644
--- a/hooks/charmhelpers/contrib/__init__.py
+++ b/hooks/charmhelpers/contrib/__init__.py
@@ -0,0 +1,15 @@
+# Copyright 2014-2015 Canonical Limited.
+#
+# This file is part of charm-helpers.
+#
+# charm-helpers is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License version 3 as
+# published by the Free Software Foundation.
+#
+# charm-helpers 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 Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
diff --git a/hooks/charmhelpers/contrib/charmsupport/__init__.py b/hooks/charmhelpers/contrib/charmsupport/__init__.py
index e69de29b..d1400a02 100644
--- a/hooks/charmhelpers/contrib/charmsupport/__init__.py
+++ b/hooks/charmhelpers/contrib/charmsupport/__init__.py
@@ -0,0 +1,15 @@
+# Copyright 2014-2015 Canonical Limited.
+#
+# This file is part of charm-helpers.
+#
+# charm-helpers is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License version 3 as
+# published by the Free Software Foundation.
+#
+# charm-helpers 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 Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
diff --git a/hooks/charmhelpers/contrib/charmsupport/nrpe.py b/hooks/charmhelpers/contrib/charmsupport/nrpe.py
index f3a936d0..0fd0a9d8 100644
--- a/hooks/charmhelpers/contrib/charmsupport/nrpe.py
+++ b/hooks/charmhelpers/contrib/charmsupport/nrpe.py
@@ -1,3 +1,19 @@
+# Copyright 2014-2015 Canonical Limited.
+#
+# This file is part of charm-helpers.
+#
+# charm-helpers is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License version 3 as
+# published by the Free Software Foundation.
+#
+# charm-helpers 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 Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+
 """Compatibility with the nrpe-external-master charm"""
 # Copyright 2012 Canonical Ltd.
 #
diff --git a/hooks/charmhelpers/contrib/charmsupport/volumes.py b/hooks/charmhelpers/contrib/charmsupport/volumes.py
index d61aa47f..320961b9 100644
--- a/hooks/charmhelpers/contrib/charmsupport/volumes.py
+++ b/hooks/charmhelpers/contrib/charmsupport/volumes.py
@@ -1,3 +1,19 @@
+# Copyright 2014-2015 Canonical Limited.
+#
+# This file is part of charm-helpers.
+#
+# charm-helpers is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License version 3 as
+# published by the Free Software Foundation.
+#
+# charm-helpers 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 Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+
 '''
 Functions for managing volumes in juju units. One volume is supported per unit.
 Subordinates may have their own storage, provided it is on its own partition.
diff --git a/hooks/charmhelpers/contrib/hahelpers/__init__.py b/hooks/charmhelpers/contrib/hahelpers/__init__.py
index e69de29b..d1400a02 100644
--- a/hooks/charmhelpers/contrib/hahelpers/__init__.py
+++ b/hooks/charmhelpers/contrib/hahelpers/__init__.py
@@ -0,0 +1,15 @@
+# Copyright 2014-2015 Canonical Limited.
+#
+# This file is part of charm-helpers.
+#
+# charm-helpers is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License version 3 as
+# published by the Free Software Foundation.
+#
+# charm-helpers 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 Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
diff --git a/hooks/charmhelpers/contrib/hahelpers/apache.py b/hooks/charmhelpers/contrib/hahelpers/apache.py
index 6616ffff..00917195 100644
--- a/hooks/charmhelpers/contrib/hahelpers/apache.py
+++ b/hooks/charmhelpers/contrib/hahelpers/apache.py
@@ -1,3 +1,19 @@
+# Copyright 2014-2015 Canonical Limited.
+#
+# This file is part of charm-helpers.
+#
+# charm-helpers is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License version 3 as
+# published by the Free Software Foundation.
+#
+# charm-helpers 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 Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+
 #
 # Copyright 2012 Canonical Ltd.
 #
diff --git a/hooks/charmhelpers/contrib/hahelpers/cluster.py b/hooks/charmhelpers/contrib/hahelpers/cluster.py
index 912b2fe3..9a2588b6 100644
--- a/hooks/charmhelpers/contrib/hahelpers/cluster.py
+++ b/hooks/charmhelpers/contrib/hahelpers/cluster.py
@@ -1,3 +1,19 @@
+# Copyright 2014-2015 Canonical Limited.
+#
+# This file is part of charm-helpers.
+#
+# charm-helpers is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License version 3 as
+# published by the Free Software Foundation.
+#
+# charm-helpers 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 Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+
 #
 # Copyright 2012 Canonical Ltd.
 #
@@ -205,19 +221,23 @@ def determine_apache_port(public_port, singlenode_mode=False):
     return public_port - (i * 10)
 
 
-def get_hacluster_config():
+def get_hacluster_config(exclude_keys=None):
     '''
     Obtains all relevant configuration from charm configuration required
     for initiating a relation to hacluster:
 
         ha-bindiface, ha-mcastport, vip
 
+    param: exclude_keys: list of setting key(s) to be excluded.
     returns: dict: A dict containing settings keyed by setting name.
     raises: HAIncompleteConfig if settings are missing.
     '''
     settings = ['ha-bindiface', 'ha-mcastport', 'vip']
     conf = {}
     for setting in settings:
+        if exclude_keys and setting in exclude_keys:
+            continue
+
         conf[setting] = config_get(setting)
     missing = []
     [missing.append(s) for s, v in six.iteritems(conf) if v is None]
diff --git a/hooks/charmhelpers/contrib/network/__init__.py b/hooks/charmhelpers/contrib/network/__init__.py
index e69de29b..d1400a02 100644
--- a/hooks/charmhelpers/contrib/network/__init__.py
+++ b/hooks/charmhelpers/contrib/network/__init__.py
@@ -0,0 +1,15 @@
+# Copyright 2014-2015 Canonical Limited.
+#
+# This file is part of charm-helpers.
+#
+# charm-helpers is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License version 3 as
+# published by the Free Software Foundation.
+#
+# charm-helpers 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 Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
diff --git a/hooks/charmhelpers/contrib/network/ip.py b/hooks/charmhelpers/contrib/network/ip.py
index 8dc83165..98b17544 100644
--- a/hooks/charmhelpers/contrib/network/ip.py
+++ b/hooks/charmhelpers/contrib/network/ip.py
@@ -1,3 +1,19 @@
+# Copyright 2014-2015 Canonical Limited.
+#
+# This file is part of charm-helpers.
+#
+# charm-helpers is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License version 3 as
+# published by the Free Software Foundation.
+#
+# charm-helpers 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 Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+
 import glob
 import re
 import subprocess
diff --git a/hooks/charmhelpers/contrib/network/ovs/__init__.py b/hooks/charmhelpers/contrib/network/ovs/__init__.py
index 8f8a5230..77e2db7f 100644
--- a/hooks/charmhelpers/contrib/network/ovs/__init__.py
+++ b/hooks/charmhelpers/contrib/network/ovs/__init__.py
@@ -1,3 +1,19 @@
+# Copyright 2014-2015 Canonical Limited.
+#
+# This file is part of charm-helpers.
+#
+# charm-helpers is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License version 3 as
+# published by the Free Software Foundation.
+#
+# charm-helpers 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 Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+
 ''' Helpers for interacting with OpenvSwitch '''
 import subprocess
 import os
diff --git a/hooks/charmhelpers/contrib/openstack/__init__.py b/hooks/charmhelpers/contrib/openstack/__init__.py
index e69de29b..d1400a02 100644
--- a/hooks/charmhelpers/contrib/openstack/__init__.py
+++ b/hooks/charmhelpers/contrib/openstack/__init__.py
@@ -0,0 +1,15 @@
+# Copyright 2014-2015 Canonical Limited.
+#
+# This file is part of charm-helpers.
+#
+# charm-helpers is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License version 3 as
+# published by the Free Software Foundation.
+#
+# charm-helpers 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 Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
diff --git a/hooks/charmhelpers/contrib/openstack/alternatives.py b/hooks/charmhelpers/contrib/openstack/alternatives.py
index b413259c..ef77caf3 100644
--- a/hooks/charmhelpers/contrib/openstack/alternatives.py
+++ b/hooks/charmhelpers/contrib/openstack/alternatives.py
@@ -1,3 +1,19 @@
+# Copyright 2014-2015 Canonical Limited.
+#
+# This file is part of charm-helpers.
+#
+# charm-helpers is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License version 3 as
+# published by the Free Software Foundation.
+#
+# charm-helpers 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 Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+
 ''' Helper for managing alternatives for file conflict resolution '''
 
 import subprocess
diff --git a/hooks/charmhelpers/contrib/openstack/amulet/__init__.py b/hooks/charmhelpers/contrib/openstack/amulet/__init__.py
index e69de29b..d1400a02 100644
--- a/hooks/charmhelpers/contrib/openstack/amulet/__init__.py
+++ b/hooks/charmhelpers/contrib/openstack/amulet/__init__.py
@@ -0,0 +1,15 @@
+# Copyright 2014-2015 Canonical Limited.
+#
+# This file is part of charm-helpers.
+#
+# charm-helpers is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License version 3 as
+# published by the Free Software Foundation.
+#
+# charm-helpers 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 Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
diff --git a/hooks/charmhelpers/contrib/openstack/amulet/deployment.py b/hooks/charmhelpers/contrib/openstack/amulet/deployment.py
index f3fee074..c50d3ec6 100644
--- a/hooks/charmhelpers/contrib/openstack/amulet/deployment.py
+++ b/hooks/charmhelpers/contrib/openstack/amulet/deployment.py
@@ -1,3 +1,19 @@
+# Copyright 2014-2015 Canonical Limited.
+#
+# This file is part of charm-helpers.
+#
+# charm-helpers is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License version 3 as
+# published by the Free Software Foundation.
+#
+# charm-helpers 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 Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+
 import six
 from charmhelpers.contrib.amulet.deployment import (
     AmuletDeployment
diff --git a/hooks/charmhelpers/contrib/openstack/amulet/utils.py b/hooks/charmhelpers/contrib/openstack/amulet/utils.py
index 3e0cc61c..9c3d918a 100644
--- a/hooks/charmhelpers/contrib/openstack/amulet/utils.py
+++ b/hooks/charmhelpers/contrib/openstack/amulet/utils.py
@@ -1,3 +1,19 @@
+# Copyright 2014-2015 Canonical Limited.
+#
+# This file is part of charm-helpers.
+#
+# charm-helpers is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License version 3 as
+# published by the Free Software Foundation.
+#
+# charm-helpers 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 Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+
 import logging
 import os
 import time
diff --git a/hooks/charmhelpers/contrib/openstack/context.py b/hooks/charmhelpers/contrib/openstack/context.py
index eaa89a67..c7c4cd4a 100644
--- a/hooks/charmhelpers/contrib/openstack/context.py
+++ b/hooks/charmhelpers/contrib/openstack/context.py
@@ -1,3 +1,19 @@
+# Copyright 2014-2015 Canonical Limited.
+#
+# This file is part of charm-helpers.
+#
+# charm-helpers is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License version 3 as
+# published by the Free Software Foundation.
+#
+# charm-helpers 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 Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+
 import json
 import os
 import time
diff --git a/hooks/charmhelpers/contrib/openstack/ip.py b/hooks/charmhelpers/contrib/openstack/ip.py
index f062c807..9eabed73 100644
--- a/hooks/charmhelpers/contrib/openstack/ip.py
+++ b/hooks/charmhelpers/contrib/openstack/ip.py
@@ -1,3 +1,19 @@
+# Copyright 2014-2015 Canonical Limited.
+#
+# This file is part of charm-helpers.
+#
+# charm-helpers is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License version 3 as
+# published by the Free Software Foundation.
+#
+# charm-helpers 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 Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+
 from charmhelpers.core.hookenv import (
     config,
     unit_get,
diff --git a/hooks/charmhelpers/contrib/openstack/neutron.py b/hooks/charmhelpers/contrib/openstack/neutron.py
index 095cc24b..902757fe 100644
--- a/hooks/charmhelpers/contrib/openstack/neutron.py
+++ b/hooks/charmhelpers/contrib/openstack/neutron.py
@@ -1,3 +1,19 @@
+# Copyright 2014-2015 Canonical Limited.
+#
+# This file is part of charm-helpers.
+#
+# charm-helpers is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License version 3 as
+# published by the Free Software Foundation.
+#
+# charm-helpers 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 Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+
 # Various utilies for dealing with Neutron and the renaming from Quantum.
 
 from subprocess import check_output
diff --git a/hooks/charmhelpers/contrib/openstack/templates/__init__.py b/hooks/charmhelpers/contrib/openstack/templates/__init__.py
index 0b49ad28..75876796 100644
--- a/hooks/charmhelpers/contrib/openstack/templates/__init__.py
+++ b/hooks/charmhelpers/contrib/openstack/templates/__init__.py
@@ -1,2 +1,18 @@
+# Copyright 2014-2015 Canonical Limited.
+#
+# This file is part of charm-helpers.
+#
+# charm-helpers is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License version 3 as
+# published by the Free Software Foundation.
+#
+# charm-helpers 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 Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+
 # dummy __init__.py to fool syncer into thinking this is a syncable python
 # module
diff --git a/hooks/charmhelpers/contrib/openstack/templating.py b/hooks/charmhelpers/contrib/openstack/templating.py
index 33df0675..24cb272b 100644
--- a/hooks/charmhelpers/contrib/openstack/templating.py
+++ b/hooks/charmhelpers/contrib/openstack/templating.py
@@ -1,3 +1,19 @@
+# Copyright 2014-2015 Canonical Limited.
+#
+# This file is part of charm-helpers.
+#
+# charm-helpers is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License version 3 as
+# published by the Free Software Foundation.
+#
+# charm-helpers 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 Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+
 import os
 
 import six
diff --git a/hooks/charmhelpers/contrib/openstack/utils.py b/hooks/charmhelpers/contrib/openstack/utils.py
index ddd40ce5..26259a03 100644
--- a/hooks/charmhelpers/contrib/openstack/utils.py
+++ b/hooks/charmhelpers/contrib/openstack/utils.py
@@ -1,5 +1,21 @@
 #!/usr/bin/python
 
+# Copyright 2014-2015 Canonical Limited.
+#
+# This file is part of charm-helpers.
+#
+# charm-helpers is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License version 3 as
+# published by the Free Software Foundation.
+#
+# charm-helpers 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 Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+
 # Common python helper functions used for OpenStack charms.
 from collections import OrderedDict
 from functools import wraps
diff --git a/hooks/charmhelpers/contrib/python/__init__.py b/hooks/charmhelpers/contrib/python/__init__.py
index e69de29b..d1400a02 100644
--- a/hooks/charmhelpers/contrib/python/__init__.py
+++ b/hooks/charmhelpers/contrib/python/__init__.py
@@ -0,0 +1,15 @@
+# Copyright 2014-2015 Canonical Limited.
+#
+# This file is part of charm-helpers.
+#
+# charm-helpers is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License version 3 as
+# published by the Free Software Foundation.
+#
+# charm-helpers 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 Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
diff --git a/hooks/charmhelpers/contrib/python/packages.py b/hooks/charmhelpers/contrib/python/packages.py
index 78162b1b..d848a120 100644
--- a/hooks/charmhelpers/contrib/python/packages.py
+++ b/hooks/charmhelpers/contrib/python/packages.py
@@ -1,6 +1,22 @@
 #!/usr/bin/env python
 # coding: utf-8
 
+# Copyright 2014-2015 Canonical Limited.
+#
+# This file is part of charm-helpers.
+#
+# charm-helpers is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License version 3 as
+# published by the Free Software Foundation.
+#
+# charm-helpers 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 Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+
 __author__ = "Jorge Niedbalski <jorge.niedbalski@canonical.com>"
 
 from charmhelpers.fetch import apt_install, apt_update
@@ -35,7 +51,7 @@ def pip_install_requirements(requirements, **options):
     pip_execute(command)
 
 
-def pip_install(package, fatal=False, **options):
+def pip_install(package, fatal=False, upgrade=False, **options):
     """Install a python package"""
     command = ["install"]
 
@@ -43,6 +59,9 @@ def pip_install(package, fatal=False, **options):
     for option in parse_options(options, available_options):
         command.append(option)
 
+    if upgrade:
+        command.append('--upgrade')
+
     if isinstance(package, list):
         command.extend(package)
     else:
diff --git a/hooks/charmhelpers/contrib/storage/__init__.py b/hooks/charmhelpers/contrib/storage/__init__.py
index e69de29b..d1400a02 100644
--- a/hooks/charmhelpers/contrib/storage/__init__.py
+++ b/hooks/charmhelpers/contrib/storage/__init__.py
@@ -0,0 +1,15 @@
+# Copyright 2014-2015 Canonical Limited.
+#
+# This file is part of charm-helpers.
+#
+# charm-helpers is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License version 3 as
+# published by the Free Software Foundation.
+#
+# charm-helpers 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 Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
diff --git a/hooks/charmhelpers/contrib/storage/linux/__init__.py b/hooks/charmhelpers/contrib/storage/linux/__init__.py
index e69de29b..d1400a02 100644
--- a/hooks/charmhelpers/contrib/storage/linux/__init__.py
+++ b/hooks/charmhelpers/contrib/storage/linux/__init__.py
@@ -0,0 +1,15 @@
+# Copyright 2014-2015 Canonical Limited.
+#
+# This file is part of charm-helpers.
+#
+# charm-helpers is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License version 3 as
+# published by the Free Software Foundation.
+#
+# charm-helpers 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 Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
diff --git a/hooks/charmhelpers/contrib/storage/linux/ceph.py b/hooks/charmhelpers/contrib/storage/linux/ceph.py
index 6ebeab5c..31ea7f9e 100644
--- a/hooks/charmhelpers/contrib/storage/linux/ceph.py
+++ b/hooks/charmhelpers/contrib/storage/linux/ceph.py
@@ -1,3 +1,19 @@
+# Copyright 2014-2015 Canonical Limited.
+#
+# This file is part of charm-helpers.
+#
+# charm-helpers is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License version 3 as
+# published by the Free Software Foundation.
+#
+# charm-helpers 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 Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+
 #
 # Copyright 2012 Canonical Ltd.
 #
diff --git a/hooks/charmhelpers/contrib/storage/linux/loopback.py b/hooks/charmhelpers/contrib/storage/linux/loopback.py
index a22c3d7b..c296f098 100644
--- a/hooks/charmhelpers/contrib/storage/linux/loopback.py
+++ b/hooks/charmhelpers/contrib/storage/linux/loopback.py
@@ -1,3 +1,19 @@
+# Copyright 2014-2015 Canonical Limited.
+#
+# This file is part of charm-helpers.
+#
+# charm-helpers is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License version 3 as
+# published by the Free Software Foundation.
+#
+# charm-helpers 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 Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+
 import os
 import re
 from subprocess import (
diff --git a/hooks/charmhelpers/contrib/storage/linux/lvm.py b/hooks/charmhelpers/contrib/storage/linux/lvm.py
index 0aa65f4f..34b5f71a 100644
--- a/hooks/charmhelpers/contrib/storage/linux/lvm.py
+++ b/hooks/charmhelpers/contrib/storage/linux/lvm.py
@@ -1,3 +1,19 @@
+# Copyright 2014-2015 Canonical Limited.
+#
+# This file is part of charm-helpers.
+#
+# charm-helpers is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License version 3 as
+# published by the Free Software Foundation.
+#
+# charm-helpers 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 Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+
 from subprocess import (
     CalledProcessError,
     check_call,
diff --git a/hooks/charmhelpers/contrib/storage/linux/utils.py b/hooks/charmhelpers/contrib/storage/linux/utils.py
index c6a15e14..c8373b72 100644
--- a/hooks/charmhelpers/contrib/storage/linux/utils.py
+++ b/hooks/charmhelpers/contrib/storage/linux/utils.py
@@ -1,3 +1,19 @@
+# Copyright 2014-2015 Canonical Limited.
+#
+# This file is part of charm-helpers.
+#
+# charm-helpers is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License version 3 as
+# published by the Free Software Foundation.
+#
+# charm-helpers 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 Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+
 import os
 import re
 from stat import S_ISBLK
diff --git a/hooks/charmhelpers/core/__init__.py b/hooks/charmhelpers/core/__init__.py
index e69de29b..d1400a02 100644
--- a/hooks/charmhelpers/core/__init__.py
+++ b/hooks/charmhelpers/core/__init__.py
@@ -0,0 +1,15 @@
+# Copyright 2014-2015 Canonical Limited.
+#
+# This file is part of charm-helpers.
+#
+# charm-helpers is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License version 3 as
+# published by the Free Software Foundation.
+#
+# charm-helpers 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 Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
diff --git a/hooks/charmhelpers/core/decorators.py b/hooks/charmhelpers/core/decorators.py
index 029a4ef4..bb05620b 100644
--- a/hooks/charmhelpers/core/decorators.py
+++ b/hooks/charmhelpers/core/decorators.py
@@ -1,3 +1,19 @@
+# Copyright 2014-2015 Canonical Limited.
+#
+# This file is part of charm-helpers.
+#
+# charm-helpers is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License version 3 as
+# published by the Free Software Foundation.
+#
+# charm-helpers 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 Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+
 #
 # Copyright 2014 Canonical Ltd.
 #
diff --git a/hooks/charmhelpers/core/fstab.py b/hooks/charmhelpers/core/fstab.py
index 0adf0db3..be7de248 100644
--- a/hooks/charmhelpers/core/fstab.py
+++ b/hooks/charmhelpers/core/fstab.py
@@ -1,6 +1,22 @@
 #!/usr/bin/env python
 # -*- coding: utf-8 -*-
 
+# Copyright 2014-2015 Canonical Limited.
+#
+# This file is part of charm-helpers.
+#
+# charm-helpers is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License version 3 as
+# published by the Free Software Foundation.
+#
+# charm-helpers 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 Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+
 __author__ = 'Jorge Niedbalski R. <jorge.niedbalski@canonical.com>'
 
 import io
diff --git a/hooks/charmhelpers/core/hookenv.py b/hooks/charmhelpers/core/hookenv.py
index 69ae4564..cf552b39 100644
--- a/hooks/charmhelpers/core/hookenv.py
+++ b/hooks/charmhelpers/core/hookenv.py
@@ -1,3 +1,19 @@
+# Copyright 2014-2015 Canonical Limited.
+#
+# This file is part of charm-helpers.
+#
+# charm-helpers is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License version 3 as
+# published by the Free Software Foundation.
+#
+# charm-helpers 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 Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+
 "Interactions with the Juju environment"
 # Copyright 2013 Canonical Ltd.
 #
diff --git a/hooks/charmhelpers/core/host.py b/hooks/charmhelpers/core/host.py
index 5221120c..cf2cbe14 100644
--- a/hooks/charmhelpers/core/host.py
+++ b/hooks/charmhelpers/core/host.py
@@ -1,3 +1,19 @@
+# Copyright 2014-2015 Canonical Limited.
+#
+# This file is part of charm-helpers.
+#
+# charm-helpers is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License version 3 as
+# published by the Free Software Foundation.
+#
+# charm-helpers 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 Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+
 """Tools for working with the host system"""
 # Copyright 2012 Canonical Ltd.
 #
@@ -168,10 +184,10 @@ def mkdir(path, owner='root', group='root', perms=0o555, force=False):
             log("Removing non-directory file {} prior to mkdir()".format(path))
             os.unlink(realpath)
             os.makedirs(realpath, perms)
-        os.chown(realpath, uid, gid)
     elif not path_exists:
         os.makedirs(realpath, perms)
-        os.chown(realpath, uid, gid)
+    os.chown(realpath, uid, gid)
+    os.chmod(realpath, perms)
 
 
 def write_file(path, content, owner='root', group='root', perms=0o444):
@@ -389,6 +405,9 @@ def cmp_pkgrevno(package, revno, pkgcache=None):
     *  0 => Installed revno is the same as supplied arg
     * -1 => Installed revno is less than supplied arg
 
+    This function imports apt_cache function from charmhelpers.fetch if
+    the pkgcache argument is None. Be sure to add charmhelpers.fetch if
+    you call this function, or pass an apt_pkg.Cache() instance.
     '''
     import apt_pkg
     if not pkgcache:
@@ -407,13 +426,21 @@ def chdir(d):
         os.chdir(cur)
 
 
-def chownr(path, owner, group):
+def chownr(path, owner, group, follow_links=True):
     uid = pwd.getpwnam(owner).pw_uid
     gid = grp.getgrnam(group).gr_gid
+    if follow_links:
+        chown = os.chown
+    else:
+        chown = os.lchown
 
     for root, dirs, files in os.walk(path):
         for name in dirs + files:
             full = os.path.join(root, name)
             broken_symlink = os.path.lexists(full) and not os.path.exists(full)
             if not broken_symlink:
-                os.chown(full, uid, gid)
+                chown(full, uid, gid)
+
+
+def lchownr(path, owner, group):
+    chownr(path, owner, group, follow_links=False)
diff --git a/hooks/charmhelpers/core/services/__init__.py b/hooks/charmhelpers/core/services/__init__.py
index 69dde79a..0928158b 100644
--- a/hooks/charmhelpers/core/services/__init__.py
+++ b/hooks/charmhelpers/core/services/__init__.py
@@ -1,2 +1,18 @@
+# Copyright 2014-2015 Canonical Limited.
+#
+# This file is part of charm-helpers.
+#
+# charm-helpers is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License version 3 as
+# published by the Free Software Foundation.
+#
+# charm-helpers 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 Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+
 from .base import *  # NOQA
 from .helpers import *  # NOQA
diff --git a/hooks/charmhelpers/core/services/base.py b/hooks/charmhelpers/core/services/base.py
index 87ecb130..c5534e4c 100644
--- a/hooks/charmhelpers/core/services/base.py
+++ b/hooks/charmhelpers/core/services/base.py
@@ -1,3 +1,19 @@
+# Copyright 2014-2015 Canonical Limited.
+#
+# This file is part of charm-helpers.
+#
+# charm-helpers is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License version 3 as
+# published by the Free Software Foundation.
+#
+# charm-helpers 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 Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+
 import os
 import re
 import json
diff --git a/hooks/charmhelpers/core/services/helpers.py b/hooks/charmhelpers/core/services/helpers.py
index 163a7932..5e3af9da 100644
--- a/hooks/charmhelpers/core/services/helpers.py
+++ b/hooks/charmhelpers/core/services/helpers.py
@@ -1,3 +1,19 @@
+# Copyright 2014-2015 Canonical Limited.
+#
+# This file is part of charm-helpers.
+#
+# charm-helpers is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License version 3 as
+# published by the Free Software Foundation.
+#
+# charm-helpers 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 Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+
 import os
 import yaml
 from charmhelpers.core import hookenv
diff --git a/hooks/charmhelpers/core/sysctl.py b/hooks/charmhelpers/core/sysctl.py
index 0f299630..d642a371 100644
--- a/hooks/charmhelpers/core/sysctl.py
+++ b/hooks/charmhelpers/core/sysctl.py
@@ -1,6 +1,22 @@
 #!/usr/bin/env python
 # -*- coding: utf-8 -*-
 
+# Copyright 2014-2015 Canonical Limited.
+#
+# This file is part of charm-helpers.
+#
+# charm-helpers is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License version 3 as
+# published by the Free Software Foundation.
+#
+# charm-helpers 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 Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+
 __author__ = 'Jorge Niedbalski R. <jorge.niedbalski@canonical.com>'
 
 import yaml
diff --git a/hooks/charmhelpers/core/templating.py b/hooks/charmhelpers/core/templating.py
index 569eaed6..97669092 100644
--- a/hooks/charmhelpers/core/templating.py
+++ b/hooks/charmhelpers/core/templating.py
@@ -1,3 +1,19 @@
+# Copyright 2014-2015 Canonical Limited.
+#
+# This file is part of charm-helpers.
+#
+# charm-helpers is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License version 3 as
+# published by the Free Software Foundation.
+#
+# charm-helpers 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 Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+
 import os
 
 from charmhelpers.core import host
diff --git a/hooks/charmhelpers/fetch/__init__.py b/hooks/charmhelpers/fetch/__init__.py
index aceadea4..792e629a 100644
--- a/hooks/charmhelpers/fetch/__init__.py
+++ b/hooks/charmhelpers/fetch/__init__.py
@@ -1,3 +1,19 @@
+# Copyright 2014-2015 Canonical Limited.
+#
+# This file is part of charm-helpers.
+#
+# charm-helpers is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License version 3 as
+# published by the Free Software Foundation.
+#
+# charm-helpers 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 Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+
 import importlib
 from tempfile import NamedTemporaryFile
 import time
diff --git a/hooks/charmhelpers/fetch/archiveurl.py b/hooks/charmhelpers/fetch/archiveurl.py
index 8a4624b2..d25a0ddd 100644
--- a/hooks/charmhelpers/fetch/archiveurl.py
+++ b/hooks/charmhelpers/fetch/archiveurl.py
@@ -1,3 +1,19 @@
+# Copyright 2014-2015 Canonical Limited.
+#
+# This file is part of charm-helpers.
+#
+# charm-helpers is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License version 3 as
+# published by the Free Software Foundation.
+#
+# charm-helpers 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 Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+
 import os
 import hashlib
 import re
diff --git a/hooks/charmhelpers/fetch/bzrurl.py b/hooks/charmhelpers/fetch/bzrurl.py
index 8ef48f30..3531315a 100644
--- a/hooks/charmhelpers/fetch/bzrurl.py
+++ b/hooks/charmhelpers/fetch/bzrurl.py
@@ -1,3 +1,19 @@
+# Copyright 2014-2015 Canonical Limited.
+#
+# This file is part of charm-helpers.
+#
+# charm-helpers is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License version 3 as
+# published by the Free Software Foundation.
+#
+# charm-helpers 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 Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+
 import os
 from charmhelpers.fetch import (
     BaseFetchHandler,
@@ -11,10 +27,12 @@ if six.PY3:
 
 try:
     from bzrlib.branch import Branch
+    from bzrlib import bzrdir, workingtree, errors
 except ImportError:
     from charmhelpers.fetch import apt_install
     apt_install("python-bzrlib")
     from bzrlib.branch import Branch
+    from bzrlib import bzrdir, workingtree, errors
 
 
 class BzrUrlFetchHandler(BaseFetchHandler):
@@ -34,9 +52,15 @@ class BzrUrlFetchHandler(BaseFetchHandler):
         if url_parts.scheme == "lp":
             from bzrlib.plugin import load_plugins
             load_plugins()
+        try:
+            local_branch = bzrdir.BzrDir.create_branch_convenience(dest)
+        except errors.AlreadyControlDirError:
+            local_branch = Branch.open(dest)
         try:
             remote_branch = Branch.open(source)
-            remote_branch.bzrdir.sprout(dest).open_branch()
+            remote_branch.push(local_branch)
+            tree = workingtree.WorkingTree.open(dest)
+            tree.update()
         except Exception as e:
             raise e
 
diff --git a/hooks/charmhelpers/fetch/giturl.py b/hooks/charmhelpers/fetch/giturl.py
index f3aa2821..5376786b 100644
--- a/hooks/charmhelpers/fetch/giturl.py
+++ b/hooks/charmhelpers/fetch/giturl.py
@@ -1,3 +1,19 @@
+# Copyright 2014-2015 Canonical Limited.
+#
+# This file is part of charm-helpers.
+#
+# charm-helpers is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License version 3 as
+# published by the Free Software Foundation.
+#
+# charm-helpers 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 Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+
 import os
 from charmhelpers.fetch import (
     BaseFetchHandler,
@@ -16,6 +32,8 @@ except ImportError:
     apt_install("python-git")
     from git import Repo
 
+from git.exc import GitCommandError
+
 
 class GitUrlFetchHandler(BaseFetchHandler):
     """Handler for git branches via generic and github URLs"""
@@ -46,6 +64,8 @@ class GitUrlFetchHandler(BaseFetchHandler):
             mkdir(dest_dir, perms=0o755)
         try:
             self.clone(source, dest_dir, branch)
+        except GitCommandError as e:
+            raise UnhandledSource(e.message)
         except OSError as e:
             raise UnhandledSource(e.strerror)
         return dest_dir
diff --git a/hooks/charmhelpers/payload/__init__.py b/hooks/charmhelpers/payload/__init__.py
index fc9fbc08..e6f42497 100644
--- a/hooks/charmhelpers/payload/__init__.py
+++ b/hooks/charmhelpers/payload/__init__.py
@@ -1 +1,17 @@
+# Copyright 2014-2015 Canonical Limited.
+#
+# This file is part of charm-helpers.
+#
+# charm-helpers is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License version 3 as
+# published by the Free Software Foundation.
+#
+# charm-helpers 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 Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+
 "Tools for working with files injected into a charm just before deployment."
diff --git a/hooks/charmhelpers/payload/execd.py b/hooks/charmhelpers/payload/execd.py
index 6476a75f..4d4d81a6 100644
--- a/hooks/charmhelpers/payload/execd.py
+++ b/hooks/charmhelpers/payload/execd.py
@@ -1,5 +1,21 @@
 #!/usr/bin/env python
 
+# Copyright 2014-2015 Canonical Limited.
+#
+# This file is part of charm-helpers.
+#
+# charm-helpers is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License version 3 as
+# published by the Free Software Foundation.
+#
+# charm-helpers 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 Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+
 import os
 import sys
 import subprocess