This file is indexed.

/usr/share/pyshared/metaconfig/mconf.py is in python-metaconfig 0.1.4a1-3.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
# BSD Licence
# Copyright (c) 2010, Science & Technology Facilities Council (STFC)
# All rights reserved.
#
# See the LICENSE file in the source distribution of this software for
# the full license text.

"""
metaconfig
----------

We want to do:

{{{
import metaconfig

# Config is a ConfigParser instance (or subclass)
# Returns the lowest level config file available (e.g. if __name__ == 'foo.bar.baz' and there is a config 
# defined for 'foo.bar' use that.
config = metaconfig.get_config(__name__)
}}}


These options are bootstraped on entry into Python as:

{{{
import metaconfig

metaconfig.add_config_file(name, path)
metaconfig.add_config(name, configParser)
metaconfig.metaconfig(metaconfig)
metaconfig.metaconfig_file(metaconfig_file)
metaconfig.from_argv()

or something like that
}}}


"""

import sys
import configparser
import re

import logging
import logging.config
log = logging.getLogger(__name__)

class Error(Exception):
    pass

DEFAULT_CONFIG_PARSER = configparser.ConfigParser

class MetaConfig(object):
    def __init__(self):
        self._configs = {}

    def add_config_file(self, name, path, ConfigClass=DEFAULT_CONFIG_PARSER):

        log.info('Adding config %s from path %s' % (name, path)) 
        conf = ConfigClass()
        conf.read([path])

        return self.add_config(name, conf)


    def add_config_fh(self, name, fileobj, ConfigClass=DEFAULT_CONFIG_PARSER):

        log.info('Adding config %s from file object' % name)
        conf = ConfigClass()
        conf.readfp(fileobj)

        return self.add_config(name, conf)

    def add_config(self, name, config_parser):
        if name in self._configs:
            Error("Config %s already exists" % name)
        else:
            config_parser.__config_name__ = name
            self._configs[name] = config_parser

        log.info('Config %s added' % name)

        return config_parser

    def get_config(self, name, ConfigClass=DEFAULT_CONFIG_PARSER, inherit=True):
        log.debug('Requested config %s, inherit=%s' % (name, inherit))

        if inherit:
            parts = name.split('.')
            while parts:
                name1 = '.'.join(parts)
                log.debug("Looking for config %s" % name1)
                try:
                    config = self._configs[name1]
                    log.debug("Selected config %s" % name1)
                    return config
                except KeyError:
                    parts = parts[:-1]
                    
        if name in self._configs:
            log.debug("Selecting config %s" % name)
            return self._configs[name]
        else:
            config = self.add_config(name, ConfigClass())
            log.debug("New config %s" % name)
            return config
        

    @classmethod
    def from_config(klass, config_parser):
        mf = klass()

        mf._setup_logging(config_parser)
        mf._parse_nested_configs(config_parser)
        mf._parse_external_configs(config_parser)

        return mf

    @classmethod
    def from_config_file(klass, config_file):
        cnf = DEFAULT_CONFIG_PARSER()
        cnf.read(config_file)

        return klass.from_config(cnf)

    @classmethod
    def from_config_fh(klass, config_fh):
        cnf = DEFAULT_CONFIG_PARSER()
        cnf.readfp(config_fh)
        
        return klass.from_config(cnf)


        
    def _parse_nested_configs(self, config_parser):
        """
        Parse configs embedded in the metaconfig file.
        """
        if not config_parser.has_option('metaconfig', 'configs'):
            return

        configs = config_parser.get('metaconfig', 'configs').split()
        D = {}
        for section in config_parser.sections():
            mo = re.match(r'(.+?):(.+)', section)
            if not mo:
                continue
            prefix, ssec = mo.groups()
            D.setdefault(prefix, []).append(ssec)


        for config in configs:
            cp = DEFAULT_CONFIG_PARSER()
            for ssec in D[config]:
                sec = '%s:%s' % (config, ssec)

                if ssec.lower() == 'default':
                    defaults = cp.defaults()
                    for option in config_parser.options(sec):
                        defaults[option] = config_parser.get(sec, option,
                                                             raw=True)
                else:
                    cp.add_section(ssec)
                    for option in config_parser.options(sec):
                        cp.set(ssec, option, config_parser.get(sec, option, 
                                                               raw=True))

            self.add_config(config, cp)

    def _parse_external_configs(self, config_parser):
        """
        Parse external config files referenced in metaconfig.conf.
        """
        pass
        #!FIXME: need to name each config.
        #if not config_parser.has_option('metaconfig', 'config-files'):
        #    return
        #
        #config_files = config_parser.get('metaconfig', 'config-files').split()
        #for cf in config_files:
        #    self.add_config_file(cf)

    def _setup_logging(self, config_parser):
        """
        Initialise logging from a nested config.

        """
        if not config_parser.has_option('metaconfig', 'logging'):
            return

        logging_file = config_parser.get('metaconfig', 'logging')
        logging.config.fileConfig(logging_file)
        log.info('Logging configuration initialised from %s' % logging_file)