Add pybasedir and bindir options

Add a pybasedir option so that it can be used for interpolation in the
default values of other options. This helps eliminate hard-coded paths
from the sample config file.

Also add a bindir option for similar reasons, but it also helps with
packaging.

Change-Id: Iadc746dcf2a24adbdf9bac945b5b330f01faeeb5

nova/auth/manager.py

@@ -63,10 +63,10 @@ auth_opts = [
                 help='Roles that apply to all projects'),
 
     cfg.StrOpt('credentials_template',
-               default=utils.abspath('auth/novarc.template'),
+               default='$pybasedir/nova/auth/novarc.template',
                help='Template for creating users rc file'),
     cfg.StrOpt('vpn_client_template',
-               default=utils.abspath('cloudpipe/client.ovpn.template'),
+               default='$pybasedir/nova/cloudpipe/client.ovpn.template',
                help='Template for creating users vpn file'),
     cfg.StrOpt('credential_vpn_file',
                default='nova-vpn.conf',

nova/cloudpipe/pipelib.py

@@ -45,7 +45,7 @@ cloudpipe_opts = [
                default='m1.tiny',
                help=_('Instance type for vpn instances')),
     cfg.StrOpt('boot_script_template',
-               default=utils.abspath('cloudpipe/bootscript.template'),
+               default='$pybasedir/nova/cloudpipe/bootscript.template',
                help=_('Template for cloudpipe instance boot script')),
     cfg.StrOpt('dmz_net',
                default='10.0.0.0',

nova/console/xvp.py

@@ -33,7 +33,7 @@ from nova import utils
 
 xvp_opts = [
     cfg.StrOpt('console_xvp_conf_template',
-               default=utils.abspath('console/xvp.conf.template'),
+               default='$pybasedir/nova/console/xvp.conf.template',
                help='XVP conf template'),
     cfg.StrOpt('console_xvp_conf',
                default='/etc/xvp.conf',

nova/flags.py

@@ -102,11 +102,18 @@ core_opts = [
     cfg.StrOpt('api_paste_config',
                default="api-paste.ini",
                help='File name for the paste.deploy config for nova-api'),
+    cfg.StrOpt('pybasedir',
+               default=os.path.abspath(os.path.join(os.path.dirname(__file__),
+                                                    '../')),
+               help='Directory where the nova python module is installed'),
+    cfg.StrOpt('bindir',
+               default='$pybasedir/bin',
+               help='Directory where nova binaries are installed'),
     cfg.StrOpt('state_path',
-               default=os.path.join(os.path.dirname(__file__), '../'),
+               default='$pybasedir',
                help="Top-level directory for maintaining nova's state"),
     cfg.StrOpt('lock_path',
-               default=os.path.join(os.path.dirname(__file__), '../'),
+               default='$pybasedir',
                help='Directory to use for lock files'),
     ]
 

nova/network/linux_net.py

@@ -35,11 +35,6 @@ from nova import utils
 LOG = logging.getLogger(__name__)
 
 
-def _bin_file(script):
-    """Return the absolute path to scipt in the bin directory."""
-    return os.path.abspath(os.path.join(__file__, '../../../bin', script))
-
-
 linux_net_opts = [
     cfg.StrOpt('dhcpbridge_flagfile',
                default='/etc/nova/nova-dhcpbridge.conf',
@@ -54,7 +49,7 @@ linux_net_opts = [
                default=None,
                help='MTU setting for vlan'),
     cfg.StrOpt('dhcpbridge',
-               default=_bin_file('nova-dhcpbridge'),
+               default='$bindir/nova-dhcpbridge',
                help='location of nova-dhcpbridge'),
     cfg.StrOpt('routing_source_ip',
                default='$my_ip',

nova/utils.py

@@ -319,10 +319,6 @@ def ssh_execute(ssh, cmd, process_input=None,
     return (stdout, stderr)
 
 
-def abspath(s):
-    return os.path.join(os.path.dirname(__file__), s)
-
-
 def novadir():
     import nova
     return os.path.abspath(nova.__file__).split('nova/__init__.py')[0]

nova/virt/baremetal/proxy.py

@@ -60,7 +60,7 @@ FLAGS = flags.FLAGS
 
 baremetal_opts = [
     cfg.StrOpt('baremetal_injected_network_template',
-                default=utils.abspath('virt/interfaces.template'),
+                default='$pybasedir/nova/virt/interfaces.template',
                 help='Template file for injected network'),
     cfg.StrOpt('baremetal_type',
                 default='baremetal',

nova/virt/disk/api.py

@@ -45,7 +45,7 @@ LOG = logging.getLogger(__name__)
 
 disk_opts = [
     cfg.StrOpt('injected_network_template',
-               default=utils.abspath('virt/interfaces.template'),
+               default='$pybasedir/nova/virt/interfaces.template',
                help='Template file for injected network'),
     cfg.ListOpt('img_handlers',
                 default=['loop', 'nbd', 'guestfs'],

nova/virt/libvirt/connection.py

@@ -87,7 +87,7 @@ libvirt_opts = [
                default=None,
                help='Rescue ari image'),
     cfg.StrOpt('libvirt_xml_template',
-               default=utils.abspath('virt/libvirt.xml.template'),
+               default='$pybasedir/nova/virt/libvirt.xml.template',
                help='Libvirt XML Template'),
     cfg.StrOpt('libvirt_type',
                default='kvm',
@@ -105,7 +105,7 @@ libvirt_opts = [
                 default=True,
                 help='Sync virtual and real mouse cursors in Windows VMs'),
     cfg.StrOpt('cpuinfo_xml_template',
-               default=utils.abspath('virt/cpuinfo.xml.template'),
+               default='$pybasedir/nova/virt/cpuinfo.xml.template',
                help='CpuInfo XML Template (Used only live migration now)'),
     cfg.StrOpt('live_migration_uri',
                default="qemu+tcp://%s/system",