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@ -18,7 +18,7 @@
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r"""
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Configuration options which may be set on the command line or in config files.
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The schema for each option is defined using the Opt sub-classes e.g.::
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The schema for each option is defined using the Opt sub-classes e.g.
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common_opts = [
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cfg.StrOpt('bind_host',
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@ -29,22 +29,20 @@ The schema for each option is defined using the Opt sub-classes e.g.::
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help='Port number to listen on')
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]
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Options can be strings, integers, floats, booleans, lists or 'multi strings'::
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Options can be strings, integers, floats, booleans, lists or 'multi strings':
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enabled_apis_opt = \
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cfg.ListOpt('enabled_apis',
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default=['ec2', 'osapi'],
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help='List of APIs to enable by default')
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enabled_apis_opt = cfg.ListOpt('enabled_apis',
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default=['ec2', 'osapi_compute'],
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help='List of APIs to enable by default')
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DEFAULT_EXTENSIONS = [
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'nova.api.openstack.contrib.standard_extensions'
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]
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osapi_extension_opt = \
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cfg.MultiStrOpt('osapi_extension',
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default=DEFAULT_EXTENSIONS)
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osapi_compute_extension_opt = cfg.MultiStrOpt('osapi_compute_extension',
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default=DEFAULT_EXTENSIONS)
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Option schemas are registered with with the config manager at runtime, but
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before the option is referenced::
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before the option is referenced:
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class ExtensionManager(object):
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@ -56,11 +54,11 @@ before the option is referenced::
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...
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def _load_extensions(self):
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for ext_factory in self.conf.osapi_extension:
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for ext_factory in self.conf.osapi_compute_extension:
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....
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A common usage pattern is for each option schema to be defined in the module or
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class which uses the option::
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class which uses the option:
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opts = ...
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@ -75,7 +73,7 @@ class which uses the option::
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An option may optionally be made available via the command line. Such options
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must registered with the config manager before the command line is parsed (for
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the purposes of --help and CLI arg validation)::
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the purposes of --help and CLI arg validation):
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cli_opts = [
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cfg.BoolOpt('verbose',
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@ -91,13 +89,12 @@ the purposes of --help and CLI arg validation)::
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def add_common_opts(conf):
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conf.register_cli_opts(cli_opts)
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The config manager has a single CLI option defined by default, --config-file::
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The config manager has a single CLI option defined by default, --config-file:
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class ConfigOpts(object):
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config_file_opt = \
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MultiStrOpt('config-file',
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...
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config_file_opt = MultiStrOpt('config-file',
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...
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def __init__(self, ...):
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...
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@ -105,7 +102,7 @@ The config manager has a single CLI option defined by default, --config-file::
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Option values are parsed from any supplied config files using SafeConfigParser.
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If none are specified, a default set is used e.g. glance-api.conf and
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glance-common.conf::
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glance-common.conf:
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glance-api.conf:
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[DEFAULT]
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@ -120,7 +117,7 @@ are parsed in order, with values in later files overriding those in earlier
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files.
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The parsing of CLI args and config files is initiated by invoking the config
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manager e.g.::
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manager e.g.
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conf = ConfigOpts()
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conf.register_opt(BoolOpt('verbose', ...))
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@ -128,34 +125,26 @@ manager e.g.::
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if conf.verbose:
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...
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Options can be registered as belonging to a group::
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Options can be registered as belonging to a group:
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rabbit_group = cfg.OptionGroup(name='rabbit',
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title='RabbitMQ options')
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rabbit_host_opt = \
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cfg.StrOpt('host',
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group='rabbit',
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default='localhost',
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help='IP/hostname to listen on'),
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rabbit_port_opt = \
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cfg.IntOpt('port',
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default=5672,
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help='Port number to listen on')
|
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|
|
rabbit_ssl_opt = \
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|
|
conf.BoolOpt('use_ssl',
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|
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default=False,
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|
|
help='Whether to support SSL connections')
|
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|
|
rabbit_host_opt = cfg.StrOpt('host',
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|
|
default='localhost',
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|
|
help='IP/hostname to listen on'),
|
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|
|
rabbit_port_opt = cfg.IntOpt('port',
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|
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default=5672,
|
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|
|
help='Port number to listen on')
|
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|
|
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|
|
def register_rabbit_opts(conf):
|
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|
|
conf.register_group(rabbit_group)
|
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|
|
|
# options can be registered under a group in any of these ways:
|
|
|
|
|
conf.register_opt(rabbit_host_opt)
|
|
|
|
|
# options can be registered under a group in either of these ways:
|
|
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|
|
conf.register_opt(rabbit_host_opt, group=rabbit_group)
|
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|
|
conf.register_opt(rabbit_port_opt, group='rabbit')
|
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|
|
conf.register_opt(rabbit_ssl_opt, group=rabbit_group)
|
|
|
|
|
|
|
|
|
|
If no group is specified, options belong to the 'DEFAULT' section of config
|
|
|
|
|
files::
|
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|
|
files:
|
|
|
|
|
|
|
|
|
|
glance-api.conf:
|
|
|
|
|
[DEFAULT]
|
|
|
|
@ -172,11 +161,11 @@ files::
|
|
|
|
|
|
|
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|
|
Command-line options in a group are automatically prefixed with the group name:
|
|
|
|
|
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|
|
--rabbit-host localhost --rabbit-use-ssl False
|
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|
|
--rabbit-host localhost --rabbit-port 9999
|
|
|
|
|
|
|
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|
|
Option values in the default group are referenced as attributes/properties on
|
|
|
|
|
the config manager; groups are also attributes on the config manager, with
|
|
|
|
|
attributes for each of the options associated with the group::
|
|
|
|
|
attributes for each of the options associated with the group:
|
|
|
|
|
|
|
|
|
|
server.start(app, conf.bind_port, conf.bind_host, conf)
|
|
|
|
|
|
|
|
|
@ -185,7 +174,7 @@ attributes for each of the options associated with the group::
|
|
|
|
|
port=conf.rabbit.port,
|
|
|
|
|
...)
|
|
|
|
|
|
|
|
|
|
Option values may reference other values using PEP 292 string substitution::
|
|
|
|
|
Option values may reference other values using PEP 292 string substitution:
|
|
|
|
|
|
|
|
|
|
opts = [
|
|
|
|
|
cfg.StrOpt('state_path',
|
|
|
|
@ -200,14 +189,31 @@ Option values may reference other values using PEP 292 string substitution::
|
|
|
|
|
]
|
|
|
|
|
|
|
|
|
|
Note that interpolation can be avoided by using '$$'.
|
|
|
|
|
|
|
|
|
|
For command line utilities that dispatch to other command line utilities, the
|
|
|
|
|
disable_interspersed_args() method is available. If this this method is called,
|
|
|
|
|
then parsing e.g.
|
|
|
|
|
|
|
|
|
|
script --verbose cmd --debug /tmp/mything
|
|
|
|
|
|
|
|
|
|
will no longer return:
|
|
|
|
|
|
|
|
|
|
['cmd', '/tmp/mything']
|
|
|
|
|
|
|
|
|
|
as the leftover arguments, but will instead return:
|
|
|
|
|
|
|
|
|
|
['cmd', '--debug', '/tmp/mything']
|
|
|
|
|
|
|
|
|
|
i.e. argument parsing is stopped at the first non-option argument.
|
|
|
|
|
"""
|
|
|
|
|
|
|
|
|
|
import sys
|
|
|
|
|
import collections
|
|
|
|
|
import ConfigParser
|
|
|
|
|
import copy
|
|
|
|
|
import optparse
|
|
|
|
|
import os
|
|
|
|
|
import string
|
|
|
|
|
import sys
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
class Error(Exception):
|
|
|
|
@ -224,13 +230,13 @@ class ArgsAlreadyParsedError(Error):
|
|
|
|
|
"""Raised if a CLI opt is registered after parsing."""
|
|
|
|
|
|
|
|
|
|
def __str__(self):
|
|
|
|
|
ret = 'arguments already parsed'
|
|
|
|
|
ret = "arguments already parsed"
|
|
|
|
|
if self.msg:
|
|
|
|
|
ret += ': ' + self.msg
|
|
|
|
|
ret += ": " + self.msg
|
|
|
|
|
return ret
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
class NoSuchOptError(Error):
|
|
|
|
|
class NoSuchOptError(Error, AttributeError):
|
|
|
|
|
"""Raised if an opt which doesn't exist is referenced."""
|
|
|
|
|
|
|
|
|
|
def __init__(self, opt_name, group=None):
|
|
|
|
@ -239,9 +245,9 @@ class NoSuchOptError(Error):
|
|
|
|
|
|
|
|
|
|
def __str__(self):
|
|
|
|
|
if self.group is None:
|
|
|
|
|
return 'no such option: %s' % self.opt_name
|
|
|
|
|
return "no such option: %s" % self.opt_name
|
|
|
|
|
else:
|
|
|
|
|
return 'no such option in group %s: %s' % (self.group.name,
|
|
|
|
|
return "no such option in group %s: %s" % (self.group.name,
|
|
|
|
|
self.opt_name)
|
|
|
|
|
|
|
|
|
|
|
|
|
|
@ -252,7 +258,7 @@ class NoSuchGroupError(Error):
|
|
|
|
|
self.group_name = group_name
|
|
|
|
|
|
|
|
|
|
def __str__(self):
|
|
|
|
|
return 'no such group: %s' % self.group_name
|
|
|
|
|
return "no such group: %s" % self.group_name
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
class DuplicateOptError(Error):
|
|
|
|
@ -262,14 +268,14 @@ class DuplicateOptError(Error):
|
|
|
|
|
self.opt_name = opt_name
|
|
|
|
|
|
|
|
|
|
def __str__(self):
|
|
|
|
|
return 'duplicate option: %s' % self.opt_name
|
|
|
|
|
return "duplicate option: %s" % self.opt_name
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
class TemplateSubstitutionError(Error):
|
|
|
|
|
"""Raised if an error occurs substituting a variable in an opt value."""
|
|
|
|
|
|
|
|
|
|
def __str__(self):
|
|
|
|
|
return 'template substitution error: %s' % self.msg
|
|
|
|
|
return "template substitution error: %s" % self.msg
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
class ConfigFilesNotFoundError(Error):
|
|
|
|
@ -279,8 +285,8 @@ class ConfigFilesNotFoundError(Error):
|
|
|
|
|
self.config_files = config_files
|
|
|
|
|
|
|
|
|
|
def __str__(self):
|
|
|
|
|
return 'Failed to read some config files: %s' % \
|
|
|
|
|
string.join(self.config_files, ',')
|
|
|
|
|
return ('Failed to read some config files: %s' %
|
|
|
|
|
string.join(self.config_files, ','))
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
class ConfigFileParseError(Error):
|
|
|
|
@ -425,7 +431,7 @@ class Opt(object):
|
|
|
|
|
:param cparser: a ConfigParser object
|
|
|
|
|
:param section: a section name
|
|
|
|
|
"""
|
|
|
|
|
return cparser.get(section, self.dest)
|
|
|
|
|
return cparser.get(section, self.dest, raw=True)
|
|
|
|
|
|
|
|
|
|
def _add_to_cli(self, parser, group=None):
|
|
|
|
|
"""Makes the option available in the command line interface.
|
|
|
|
@ -541,6 +547,7 @@ class BoolOpt(Opt):
|
|
|
|
|
container = self._get_optparse_container(parser, group)
|
|
|
|
|
kwargs = self._get_optparse_kwargs(group, action='store_false')
|
|
|
|
|
prefix = self._get_optparse_prefix('no', group)
|
|
|
|
|
kwargs["help"] = "The inverse of --" + self.name
|
|
|
|
|
self._add_to_optparse(container, self.name, None, kwargs, prefix)
|
|
|
|
|
|
|
|
|
|
def _get_optparse_kwargs(self, group, action='store_true', **kwargs):
|
|
|
|
@ -613,8 +620,8 @@ class MultiStrOpt(Opt):
|
|
|
|
|
"""Retrieve the opt value as a multistr from ConfigParser."""
|
|
|
|
|
# FIXME(markmc): values spread across the CLI and multiple
|
|
|
|
|
# config files should be appended
|
|
|
|
|
value = \
|
|
|
|
|
super(MultiStrOpt, self)._get_from_config_parser(cparser, section)
|
|
|
|
|
value = super(MultiStrOpt, self)._get_from_config_parser(cparser,
|
|
|
|
|
section)
|
|
|
|
|
return value if value is None else [value]
|
|
|
|
|
|
|
|
|
|
def _get_optparse_kwargs(self, group, **kwargs):
|
|
|
|
@ -657,7 +664,7 @@ class OptGroup(object):
|
|
|
|
|
self.title = title
|
|
|
|
|
self.help = help
|
|
|
|
|
|
|
|
|
|
self._opts = {} # dict of dicts of {opt:, override:, default:)
|
|
|
|
|
self._opts = {} # dict of dicts of (opt:, override:, default:)
|
|
|
|
|
self._optparse_group = None
|
|
|
|
|
|
|
|
|
|
def _register_opt(self, opt):
|
|
|
|
@ -677,12 +684,12 @@ class OptGroup(object):
|
|
|
|
|
def _get_optparse_group(self, parser):
|
|
|
|
|
"""Build an optparse.OptionGroup for this group."""
|
|
|
|
|
if self._optparse_group is None:
|
|
|
|
|
self._optparse_group = \
|
|
|
|
|
optparse.OptionGroup(parser, self.title, self.help)
|
|
|
|
|
self._optparse_group = optparse.OptionGroup(parser, self.title,
|
|
|
|
|
self.help)
|
|
|
|
|
return self._optparse_group
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
class ConfigOpts(object):
|
|
|
|
|
class ConfigOpts(collections.Mapping):
|
|
|
|
|
|
|
|
|
|
"""
|
|
|
|
|
Config options which may be set on the command line or in config files.
|
|
|
|
@ -732,7 +739,7 @@ class ConfigOpts(object):
|
|
|
|
|
usage=self.usage)
|
|
|
|
|
self._cparser = None
|
|
|
|
|
|
|
|
|
|
self.register_cli_opt(\
|
|
|
|
|
self.register_cli_opt(
|
|
|
|
|
MultiStrOpt('config-file',
|
|
|
|
|
default=self.default_config_files,
|
|
|
|
|
metavar='PATH',
|
|
|
|
@ -777,6 +784,23 @@ class ConfigOpts(object):
|
|
|
|
|
"""
|
|
|
|
|
return self._substitute(self._get(name))
|
|
|
|
|
|
|
|
|
|
def __getitem__(self, key):
|
|
|
|
|
"""Look up an option value and perform string substitution."""
|
|
|
|
|
return self.__getattr__(key)
|
|
|
|
|
|
|
|
|
|
def __contains__(self, key):
|
|
|
|
|
"""Return True if key is the name of a registered opt or group."""
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return key in self._opts or key in self._groups
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def __iter__(self):
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"""Iterate over all registered opt and group names."""
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for key in self._opts.keys() + self._groups.keys():
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yield key
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def __len__(self):
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"""Return the number of options and option groups."""
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return len(self._opts) + len(self._groups)
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def reset(self):
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"""Reset the state of the object to before it was called."""
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self._args = None
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@ -881,6 +905,31 @@ class ConfigOpts(object):
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opt_info = self._get_opt_info(name, group)
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opt_info['default'] = default
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def disable_interspersed_args(self):
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"""Set parsing to stop on the first non-option.
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If this this method is called, then parsing e.g.
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script --verbose cmd --debug /tmp/mything
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will no longer return:
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['cmd', '/tmp/mything']
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as the leftover arguments, but will instead return:
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['cmd', '--debug', '/tmp/mything']
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i.e. argument parsing is stopped at the first non-option argument.
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"""
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self._oparser.disable_interspersed_args()
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def enable_interspersed_args(self):
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"""Set parsing to not stop on the first non-option.
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This it the default behaviour."""
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self._oparser.enable_interspersed_args()
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def log_opt_values(self, logger, lvl):
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"""Log the value of all registered opts.
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@ -901,7 +950,7 @@ class ConfigOpts(object):
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logger.log(lvl, "%-30s = %s", opt_name, getattr(self, opt_name))
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for group_name in self._groups:
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group_attr = self.GroupAttr(self, group_name)
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group_attr = self.GroupAttr(self, self._get_group(group_name))
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for opt_name in sorted(self._groups[group_name]._opts):
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logger.log(lvl, "%-30s = %s",
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|
"%s.%s" % (group_name, opt_name),
|
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|
@ -913,20 +962,21 @@ class ConfigOpts(object):
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|
"""Print the usage message for the current program."""
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|
self._oparser.print_usage(file)
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def print_help(self, file=None):
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|
"""Print the help message for the current program."""
|
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|
|
self._oparser.print_help(file)
|
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def _get(self, name, group=None):
|
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|
|
"""Look up an option value.
|
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|
|
|
|
|
|
|
|
:param name: the opt name (or 'dest', more precisely)
|
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|
|
|
:param group: an option OptGroup
|
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|
|
|
:param group: an OptGroup
|
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|
|
:returns: the option value, or a GroupAttr object
|
|
|
|
|
:raises: NoSuchOptError, NoSuchGroupError, ConfigFileValueError,
|
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|
|
TemplateSubstitutionError
|
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|
|
|
"""
|
|
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|
|
if group is None and name in self._groups:
|
|
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|
|
return self.GroupAttr(self, name)
|
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|
|
if group is not None:
|
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|
|
group = self._get_group(group)
|
|
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|
|
return self.GroupAttr(self, self._get_group(name))
|
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|
|
|
|
|
|
info = self._get_opt_info(name, group)
|
|
|
|
|
default, opt, override = map(lambda k: info[k], sorted(info.keys()))
|
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|
|
@ -1028,17 +1078,18 @@ class ConfigOpts(object):
|
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|
|
|
not_read_ok = filter(lambda f: f not in read_ok, config_files)
|
|
|
|
|
raise ConfigFilesNotFoundError(not_read_ok)
|
|
|
|
|
|
|
|
|
|
class GroupAttr(object):
|
|
|
|
|
class GroupAttr(collections.Mapping):
|
|
|
|
|
|
|
|
|
|
"""
|
|
|
|
|
A helper class representing the option values of a group as attributes.
|
|
|
|
|
A helper class representing the option values of a group as a mapping
|
|
|
|
|
and attributes.
|
|
|
|
|
"""
|
|
|
|
|
|
|
|
|
|
def __init__(self, conf, group):
|
|
|
|
|
"""Construct a GroupAttr object.
|
|
|
|
|
|
|
|
|
|
:param conf: a ConfigOpts object
|
|
|
|
|
:param group: a group name or OptGroup object
|
|
|
|
|
:param group: an OptGroup object
|
|
|
|
|
"""
|
|
|
|
|
self.conf = conf
|
|
|
|
|
self.group = group
|
|
|
|
@ -1047,6 +1098,23 @@ class ConfigOpts(object):
|
|
|
|
|
"""Look up an option value and perform template substitution."""
|
|
|
|
|
return self.conf._substitute(self.conf._get(name, self.group))
|
|
|
|
|
|
|
|
|
|
def __getitem__(self, key):
|
|
|
|
|
"""Look up an option value and perform string substitution."""
|
|
|
|
|
return self.__getattr__(key)
|
|
|
|
|
|
|
|
|
|
def __contains__(self, key):
|
|
|
|
|
"""Return True if key is the name of a registered opt or group."""
|
|
|
|
|
return key in self.group._opts
|
|
|
|
|
|
|
|
|
|
def __iter__(self):
|
|
|
|
|
"""Iterate over all registered opt and group names."""
|
|
|
|
|
for key in self.group._opts.keys():
|
|
|
|
|
yield key
|
|
|
|
|
|
|
|
|
|
def __len__(self):
|
|
|
|
|
"""Return the number of options and option groups."""
|
|
|
|
|
return len(self.group._opts)
|
|
|
|
|
|
|
|
|
|
class StrSubWrapper(object):
|
|
|
|
|
|
|
|
|
|
"""
|
|
|
|
@ -1116,13 +1184,12 @@ class CommonConfigOpts(ConfigOpts):
|
|
|
|
|
StrOpt('log-dir',
|
|
|
|
|
help='(Optional) The directory to keep log files in '
|
|
|
|
|
'(will be prepended to --logfile)'),
|
|
|
|
|
StrOpt('syslog-log-facility',
|
|
|
|
|
default='LOG_USER',
|
|
|
|
|
help='(Optional) The syslog facility to use when logging '
|
|
|
|
|
'to syslog (defaults to LOG_USER)'),
|
|
|
|
|
BoolOpt('use-syslog',
|
|
|
|
|
default=False,
|
|
|
|
|
help='Use syslog for logging.'),
|
|
|
|
|
StrOpt('syslog-log-facility',
|
|
|
|
|
default='LOG_USER',
|
|
|
|
|
help='syslog facility to receive log lines')
|
|
|
|
|
]
|
|
|
|
|
|
|
|
|
|
def __init__(self, **kwargs):
|
|
|
|
|