This file is indexed.

/usr/share/pyshared/yum/plugins.py is in yum 3.2.25-1ubuntu2.

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
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
# 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 2 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 Library 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.
# Copyright 2005 Duke University

import os
import glob
import imp
import warnings
import atexit
import gettext
import logging
import logginglevels
from constants import *
import config 
from config import ParsingError, ConfigParser
import Errors
from parser import ConfigPreProcessor

from textwrap import fill
import fnmatch

from weakref import proxy as weakref

from yum import _

from yum.i18n import utf8_width

# TODO: expose rpm package sack objects to plugins (once finished)
# TODO: allow plugins to use the existing config stuff to define options for
# their own configuration files (would replace confString() etc).
# TODO: expose progress bar interface
# TODO "log" slot? To allow plugins to do customised logging/history (say to a
# SQL db)
# TODO: consistent case of YumPlugins methods
# TODO: allow plugins to extend shell commands
# TODO: allow plugins to define new repository types
# TODO: More developer docs:  use epydoc as API begins to stablise


# The API_VERSION constant defines the current plugin API version. It is used
# to decided whether or not plugins can be loaded. It is compared against the
# 'requires_api_version' attribute of each plugin. The version number has the
# format: "major_version.minor_version".
# 
# For a plugin to be loaded the major version required by the plugin must match
# the major version in API_VERSION. Additionally, the minor version in
# API_VERSION must be greater than or equal the minor version required by the
# plugin.
# 
# If a change to yum is made that break backwards compatibility wrt the plugin
# API, the major version number must be incremented and the minor version number
# reset to 0. If a change is made that doesn't break backwards compatibility,
# then the minor number must be incremented.
API_VERSION = '2.6'

class DeprecatedInt(int):
    '''
    A simple int subclass that used to check when a deprecated constant is used.
    '''

# Plugin types
TYPE_CORE = 0
TYPE_INTERACTIVE = 1
TYPE_INTERFACE = DeprecatedInt(1)
ALL_TYPES = (TYPE_CORE, TYPE_INTERACTIVE)

# Mapping of slots to conduit classes
SLOT_TO_CONDUIT = {
    'config': 'ConfigPluginConduit',
    'postconfig': 'PostConfigPluginConduit',
    'init': 'InitPluginConduit',
    'args': 'ArgsPluginConduit',
    'predownload': 'DownloadPluginConduit',
    'postdownload': 'DownloadPluginConduit',
    'prereposetup': 'PreRepoSetupPluginConduit',
    'postreposetup': 'PostRepoSetupPluginConduit',
    'close': 'PluginConduit',
    'clean': 'PluginConduit',
    'pretrans': 'MainPluginConduit',
    'posttrans': 'MainPluginConduit',
    'exclude': 'MainPluginConduit',
    'preresolve': 'DepsolvePluginConduit',
    'postresolve': 'DepsolvePluginConduit',
    }

# Enumerate all slot names
SLOTS = SLOT_TO_CONDUIT.keys()

class PluginYumExit(Exception):
    '''Used by plugins to signal that yum should stop
    '''
    def __init__(self, value="", translation_domain=""):
        self.value = value
        self.translation_domain = translation_domain
    def __str__(self):
        if self.translation_domain:
            return gettext.dgettext(self.translation_domain, self.value)
        else:
            return self.value
    
class YumPlugins:
    '''
    Manager class for Yum plugins.
    '''

    def __init__(self, base, searchpath, optparser=None, types=None, 
            pluginconfpath=None,disabled=None,enabled=None):
        '''Initialise the instance.

        @param base: The
        @param searchpath: A list of paths to look for plugin modules.
        @param optparser: The OptionParser instance for this run (optional).
            Use to allow plugins to extend command line options.
        @param types: A sequence specifying the types of plugins to load.
            This should be sequnce containing one or more of the TYPE_...
            constants. If None (the default), all plugins will be loaded.
        @param pluginconfpath: A list of paths to look for plugin configuration
            files. Defaults to "/etc/yum/pluginconf.d".
        '''
        if not pluginconfpath:
            pluginconfpath = ['/etc/yum/pluginconf.d']

        self.searchpath = searchpath
        self.pluginconfpath = pluginconfpath
        self.base = weakref(base)
        self.optparser = optparser
        self.cmdline = (None, None)
        self.verbose_logger = logging.getLogger("yum.verbose.YumPlugins")
        self.disabledPlugins = disabled
        self.enabledPlugins  = enabled
        if types is None:
            types = ALL_TYPES
        if not isinstance(types, (list, tuple)):
            types = (types,)

        if id(TYPE_INTERFACE) in [id(t) for t in types]:
            self.verbose_logger.log(logginglevels.INFO_2,
                    'Deprecated constant TYPE_INTERFACE during plugin '
                    'initialization.\nPlease use TYPE_INTERACTIVE instead.')

        self._importplugins(types)

        self.cmdlines = {}

        # Call close handlers when yum exit's
        atexit.register(self.run, 'close')

        # Let plugins register custom config file options
        self.run('config')

    def run(self, slotname, **kwargs):
        '''Run all plugin functions for the given slot.
        '''
        # Determine handler class to use
        conduitcls = SLOT_TO_CONDUIT.get(slotname, None)
        if conduitcls is None:
            raise ValueError('unknown slot name "%s"' % slotname)
        conduitcls = eval(conduitcls)       # Convert name to class object

        for modname, func in self._pluginfuncs[slotname]:
            self.verbose_logger.log(logginglevels.DEBUG_4,
                                    'Running "%s" handler for "%s" plugin',
                                    slotname, modname)
    
            _, conf = self._plugins[modname]
            func(conduitcls(self, self.base, conf, **kwargs))

    def _importplugins(self, types):
        '''Load plugins matching the given types.
        '''

        # Initialise plugin dict
        self._plugins = {}
        self._pluginfuncs = {}
        for slot in SLOTS:
            self._pluginfuncs[slot] = []

        # Import plugins 
        self._used_disable_plugin = set()
        self._used_enable_plugin  = set()
        for dir in self.searchpath:
            if not os.path.isdir(dir):
                continue
            for modulefile in sorted(glob.glob('%s/*.py' % dir)):
                self._loadplugin(modulefile, types)

        # If we are in verbose mode we get the full 'Loading "blah" plugin' lines
        if (self._plugins and
            not self.verbose_logger.isEnabledFor(logginglevels.DEBUG_3)):
            # Mostly copied from YumOutput._outKeyValFill()
            key = _("Loaded plugins: ")
            val = ", ".join(sorted(self._plugins))
            nxt = ' ' * (utf8_width(key) - 2) + ': '
            width = 80
            if hasattr(self.base, 'term'):
                width = self.base.term.columns
            self.verbose_logger.log(logginglevels.INFO_2,
                                    fill(val, width=width, initial_indent=key,
                                         subsequent_indent=nxt))

        if self.disabledPlugins:
            for wc in self.disabledPlugins:
                if wc not in self._used_disable_plugin:
                    self.verbose_logger.log(logginglevels.INFO_2,
                                            _("No plugin match for: %s") % wc)
        del self._used_disable_plugin
        if self.enabledPlugins:
            for wc in self.enabledPlugins:
                if wc not in self._used_enable_plugin:
                    self.verbose_logger.log(logginglevels.INFO_2,
                                            _("No plugin match for: %s") % wc)
        del self._used_enable_plugin

    @staticmethod
    def _plugin_cmdline_match(modname, plugins, used):
        """ Check if this plugin has been temporary enabled/disabled. """
        if plugins is None:
            return False

        for wc in plugins:
            if fnmatch.fnmatch(modname, wc):
                used.add(wc)
                return True

        return False


    def _loadplugin(self, modulefile, types):
        '''Attempt to import a plugin module and register the hook methods it
        uses.
        '''
        dir, modname = os.path.split(modulefile)
        modname = modname.split('.py')[0]

        conf = self._getpluginconf(modname)
        if (not conf or
            (not config.getOption(conf, 'main', 'enabled',
                                  config.BoolOption(False)) and
             not self._plugin_cmdline_match(modname, self.enabledPlugins,
                                            self._used_enable_plugin))):
            self.verbose_logger.debug(_('Not loading "%s" plugin, as it is disabled'), modname)
            return

        try:
            fp, pathname, description = imp.find_module(modname, [dir])
            try:
                module = imp.load_module(modname, fp, pathname, description)
            finally:
                fp.close()
        except:
            if self.verbose_logger.isEnabledFor(logginglevels.DEBUG_4):
                raise # Give full backtrace:
            self.verbose_logger.error(_('Plugin "%s" can\'t be imported') %
                                      modname)
            return

        # Check API version required by the plugin
        if not hasattr(module, 'requires_api_version'):
            self.verbose_logger.error(
                _('Plugin "%s" doesn\'t specify required API version') %
                modname)
            return
        if not apiverok(API_VERSION, module.requires_api_version):
            self.verbose_logger.error(
                _('Plugin "%s" requires API %s. Supported API is %s.') % (
                    modname,
                    module.requires_api_version,
                    API_VERSION,
                    ))
            return

        # Check plugin type against filter
        plugintypes = getattr(module, 'plugin_type', ALL_TYPES)
        if not isinstance(plugintypes, (list, tuple)):
            plugintypes = (plugintypes,)

        if len(plugintypes) < 1:
            return
        for plugintype in plugintypes:
            if id(plugintype) == id(TYPE_INTERFACE):
                self.verbose_logger.log(logginglevels.INFO_2,
                        'Plugin "%s" uses deprecated constant '
                        'TYPE_INTERFACE.\nPlease use TYPE_INTERACTIVE '
                        'instead.', modname)

            if plugintype not in types:
                return

        #  This should really work like enable/disable repo. and be based on the
        # cmd line order ... but the API doesn't really allow that easily.
        # FIXME: Fix for 4.*
        if (self._plugin_cmdline_match(modname, self.disabledPlugins,
                                       self._used_disable_plugin) and
            not self._plugin_cmdline_match(modname, self.enabledPlugins,
                                           self._used_enable_plugin)):
            return

        self.verbose_logger.log(logginglevels.DEBUG_3, _('Loading "%s" plugin'),
                                modname)

        # Store the plugin module and its configuration file
        if not self._plugins.has_key(modname):
            self._plugins[modname] = (module, conf)
        else:
            raise Errors.ConfigError(_('Two or more plugins with the name "%s" ' \
                    'exist in the plugin search path') % modname)
        
        for slot in SLOTS:
            funcname = slot+'_hook'
            if hasattr(module, funcname):
                self._pluginfuncs[slot].append(
                        (modname, getattr(module, funcname))
                        )

    def _getpluginconf(self, modname):
        '''Parse the plugin specific configuration file and return a
        IncludingConfigParser instance representing it. Returns None if there
        was an error reading or parsing the configuration file.
        '''
        for dir in self.pluginconfpath:
            conffilename = os.path.join(dir, modname + ".conf")
            if os.access(conffilename, os.R_OK):
                # Found configuration file
                break
            self.verbose_logger.log(logginglevels.INFO_2, _("Configuration file %s not found") % conffilename)
        else: # for
            # Configuration files for the plugin not found
            self.verbose_logger.log(logginglevels.INFO_2, _("Unable to find configuration file for plugin %s")
                % modname)
            return None
        parser = ConfigParser()
        confpp_obj = ConfigPreProcessor(conffilename)
        try:
            parser.readfp(confpp_obj)
        except ParsingError, e:
            raise Errors.ConfigError("Couldn't parse %s: %s" % (conffilename,
                str(e)))
        return parser

    def setCmdLine(self, opts, commands):
        '''Set the parsed command line options so that plugins can access them
        '''
        self.cmdline = (opts, commands)


class DummyYumPlugins:
    '''
    This class provides basic emulation of the YumPlugins class. It exists so
    that calls to plugins.run() don't fail if plugins aren't in use.
    '''
    def run(self, *args, **kwargs):
        pass

    def setCmdLine(self, *args, **kwargs):
        pass

class PluginConduit:
    def __init__(self, parent, base, conf):
        self._parent = parent
        self._base = base
        self._conf = conf

        self.logger = logging.getLogger("yum.plugin")
        self.verbose_logger = logging.getLogger("yum.verbose.plugin")

    def info(self, level, msg):
        converted_level = logginglevels.logLevelFromDebugLevel(level)
        self.verbose_logger.log(converted_level, msg)

    def error(self, level, msg):
        converted_level = logginglevels.logLevelFromErrorLevel(level)
        self.logger.log(converted_level, msg)

    def promptYN(self, msg):
        self.info(2, msg)
        if self._base.conf.assumeyes:
            return 1
        else:
            return self._base.userconfirm()

    def getYumVersion(self):
        import yum
        return yum.__version__

    def getOptParser(self):
        '''Return the optparse.OptionParser instance for this execution of Yum

        In the "config" and "init" slots a plugin may add extra options to this
        instance to extend the command line options that Yum exposes.

        In all other slots a plugin may only read the OptionParser instance.
        Any modification of the instance at this point will have no effect. 
        
        See the getCmdLine() method for details on how to retrieve the parsed
        values of command line options.

        @return: the global optparse.OptionParser instance used by Yum. May be
            None if an OptionParser isn't in use.
        '''
        # ' xemacs highlighting hack
        # This isn't API compatible :(
        # return self._parent.optparser.plugin_option_group
        return self._parent.optparser

    def confString(self, section, opt, default=None):
        '''Read a string value from the plugin's own configuration file

        @param section: Configuration file section to read.
        @param opt: Option name to read.
        @param default: Value to read if option is missing.
        @return: String option value read, or default if option was missing.
        '''
        # ' xemacs highlighting hack
        return config.getOption(self._conf, section, opt, config.Option(default))

    def confInt(self, section, opt, default=None):
        '''Read an integer value from the plugin's own configuration file

        @param section: Configuration file section to read.
        @param opt: Option name to read.
        @param default: Value to read if option is missing.
        @return: Integer option value read, or default if option was missing or
            could not be parsed.
        '''
        return config.getOption(self._conf, section, opt, config.IntOption(default))

    def confFloat(self, section, opt, default=None):
        '''Read a float value from the plugin's own configuration file

        @param section: Configuration file section to read.
        @param opt: Option name to read.
        @param default: Value to read if option is missing.
        @return: Float option value read, or default if option was missing or
            could not be parsed.
        '''
        return config.getOption(self._conf, section, opt, config.FloatOption(default))

    def confBool(self, section, opt, default=None):
        '''Read a boolean value from the plugin's own configuration file

        @param section: Configuration file section to read.
        @param opt: Option name to read.
        @param default: Value to read if option is missing.
        @return: Boolean option value read, or default if option was missing or
            could not be parsed.
        '''
        return config.getOption(self._conf, section, opt, config.BoolOption(default))

    def registerPackageName(self, name):
        self._base.run_with_package_names.add(name)


class ConfigPluginConduit(PluginConduit):

    def registerOpt(self, name, valuetype, where, default):
        '''Register a yum configuration file option.

        @param name: Name of the new option.
        @param valuetype: Option type (PLUG_OPT_BOOL, PLUG_OPT_STRING ...)
        @param where: Where the option should be available in the config file.
            (PLUG_OPT_WHERE_MAIN, PLUG_OPT_WHERE_REPO, ...)
        @param default: Default value for the option if not set by the user.
        '''
        warnings.warn('registerOpt() will go away in a future version of Yum.\n'
                'Please manipulate config.YumConf and config.RepoConf directly.',
                DeprecationWarning)

        type2opt =  {
            PLUG_OPT_STRING: config.Option,
            PLUG_OPT_INT: config.IntOption,
            PLUG_OPT_BOOL: config.BoolOption,
            PLUG_OPT_FLOAT: config.FloatOption,
            }

        if where == PLUG_OPT_WHERE_MAIN:
            setattr(config.YumConf, name, type2opt[valuetype](default))

        elif where == PLUG_OPT_WHERE_REPO:
            setattr(config.RepoConf, name, type2opt[valuetype](default))

        elif where == PLUG_OPT_WHERE_ALL:
            option = type2opt[valuetype](default)
            setattr(config.YumConf, name, option)
            setattr(config.RepoConf, name, config.Inherit(option))

    def registerCommand(self, command):
        if hasattr(self._base, 'registerCommand'):
            self._base.registerCommand(command)
        else:
            raise Errors.ConfigError(_('registration of commands not supported'))

class PostConfigPluginConduit(ConfigPluginConduit):

    def getConf(self):
        return self._base.conf

class InitPluginConduit(PluginConduit):

    def getConf(self):
        return self._base.conf

    def getRepos(self):
        '''Return Yum's container object for all configured repositories.

        @return: Yum's RepoStorage instance
        '''
        return self._base.repos

class ArgsPluginConduit(InitPluginConduit):

    def __init__(self, parent, base, conf, args):
        InitPluginConduit.__init__(self, parent, base, conf)
        self._args = args

    def getArgs(self):
        return self._args

class PreRepoSetupPluginConduit(InitPluginConduit):

    def getCmdLine(self):
        '''Return parsed command line options.

        @return: (options, commands) as returned by OptionParser.parse_args()
        '''
        return self._parent.cmdline

    def getRpmDB(self):
        '''Return a representation of local RPM database. This allows querying
        of installed packages.

        @return: rpmUtils.RpmDBHolder instance
        '''
        return self._base.rpmdb

class PostRepoSetupPluginConduit(PreRepoSetupPluginConduit):

    def getGroups(self):
        '''Return group information.

        @return: yum.comps.Comps instance
        '''
        return self._base.comps

class DownloadPluginConduit(PostRepoSetupPluginConduit):

    def __init__(self, parent, base, conf, pkglist, errors=None):
        PostRepoSetupPluginConduit.__init__(self, parent, base, conf)
        self._pkglist = pkglist
        self._errors = errors

    def getDownloadPackages(self):
        '''Return a list of package objects representing packages to be
        downloaded.
        '''
        return self._pkglist

    def getErrors(self):
        '''Return a dictionary of download errors. 
        
        The returned dictionary is indexed by package object. Each element is a
        list of strings describing the error.
        '''
        if not self._errors:
            return {}
        return self._errors

class MainPluginConduit(PostRepoSetupPluginConduit):

    def getPackages(self, repo=None):
        if repo:
            arg = repo.id
        else:
            arg = None
        return self._base.pkgSack.returnPackages(arg)

    def getPackageByNevra(self, nevra):
        '''Retrieve a package object from the packages loaded by Yum using
        nevra information 
        
        @param nevra: A tuple holding (name, epoch, version, release, arch)
            for a package
        @return: A PackageObject instance (or subclass)
        '''
        return self._base.getPackageObject(nevra)

    def delPackage(self, po):
        po.repo.sack.delPackage(po)

    def getTsInfo(self):
        return self._base.tsInfo

class DepsolvePluginConduit(MainPluginConduit):
    def __init__(self, parent, base, conf, rescode=None, restring=[]):
        MainPluginConduit.__init__(self, parent, base, conf)
        self.resultcode = rescode
        self.resultstring = restring


def parsever(apiver):
    maj, min = apiver.split('.')
    return int(maj), int(min)

def apiverok(a, b):
    '''Return true if API version "a" supports API version "b"
    '''
    a = parsever(a)
    b = parsever(b)

    if a[0] != b[0]:
        return 0

    if a[1] >= b[1]:
        return 1

    return 0