FM / yum

/usr/lib/python2.6/site-packages/yum

Name	Size	Mode	Actions
callbacks.py	4666	0755	edit dl rm
callbacks.pyc	5278	0644	edit dl rm
callbacks.pyo	5278	0644	edit dl rm
comps.py	20770	0755	edit dl rm
comps.pyc	17568	0644	edit dl rm
comps.pyo	17568	0644	edit dl rm
config.py	37292	0755	edit dl rm
config.pyc	37470	0644	edit dl rm
config.pyo	37470	0644	edit dl rm
constants.py	4698	0755	edit dl rm
constants.pyc	3575	0644	edit dl rm
constants.pyo	3575	0644	edit dl rm
depsolve.py	65512	0755	edit dl rm
depsolve.pyc	39644	0644	edit dl rm
depsolve.pyo	39586	0644	edit dl rm
Errors.py	3780	0755	edit dl rm
Errors.pyc	8185	0644	edit dl rm
Errors.pyo	8185	0644	edit dl rm
failover.py	3372	0755	edit dl rm
failover.pyc	3591	0644	edit dl rm
failover.pyo	3591	0644	edit dl rm
history.py	62468	0755	edit dl rm
history.pyc	54985	0644	edit dl rm
history.pyo	54769	0644	edit dl rm
i18n.py	20683	0755	edit dl rm
i18n.pyc	16516	0644	edit dl rm
i18n.pyo	16516	0644	edit dl rm
logginglevels.py	7986	0755	edit dl rm
logginglevels.pyc	6620	0644	edit dl rm
logginglevels.pyo	6620	0644	edit dl rm
mdparser.py	6408	0755	edit dl rm
mdparser.pyc	7818	0644	edit dl rm
mdparser.pyo	7818	0644	edit dl rm
metalink.py	9506	0755	edit dl rm
metalink.pyc	9147	0644	edit dl rm
metalink.pyo	9077	0644	edit dl rm
misc.py	36716	0755	edit dl rm
misc.pyc	36926	0644	edit dl rm
misc.pyo	36885	0644	edit dl rm
packages.py	82489	0755	edit dl rm
packages.pyc	79613	0644	edit dl rm
packages.pyo	79572	0644	edit dl rm
packageSack.py	41879	0755	edit dl rm
packageSack.pyc	43372	0644	edit dl rm
packageSack.pyo	43372	0644	edit dl rm
parser.py	7807	0755	edit dl rm
parser.pyc	6545	0644	edit dl rm
parser.pyo	6545	0644	edit dl rm
pgpmsg.py	54420	0755	edit dl rm
pgpmsg.pyc	39598	0644	edit dl rm
pgpmsg.pyo	39598	0644	edit dl rm
pkgtag_db.py	4955	0755	edit dl rm
pkgtag_db.pyc	5211	0644	edit dl rm
pkgtag_db.pyo	5211	0644	edit dl rm
plugins.py	25083	0755	edit dl rm
plugins.pyc	26384	0644	edit dl rm
plugins.pyo	26384	0644	edit dl rm
repoMDObject.py	10084	0755	edit dl rm
repoMDObject.pyc	8617	0644	edit dl rm
repoMDObject.pyo	8617	0644	edit dl rm
repos.py	14302	0755	edit dl rm
repos.pyc	15834	0644	edit dl rm
repos.pyo	15785	0644	edit dl rm
rpmsack.py	68762	0755	edit dl rm
rpmsack.pyc	58447	0644	edit dl rm
rpmsack.pyo	58308	0644	edit dl rm
rpmtrans.py	25004	0755	edit dl rm
rpmtrans.pyc	23500	0644	edit dl rm
rpmtrans.pyo	23443	0644	edit dl rm
sqlitesack.py	71379	0755	edit dl rm
sqlitesack.pyc	55778	0644	edit dl rm
sqlitesack.pyo	55350	0644	edit dl rm
sqlutils.py	6422	0755	edit dl rm
sqlutils.pyc	5789	0644	edit dl rm
sqlutils.pyo	5789	0644	edit dl rm
transactioninfo.py	32007	0755	edit dl rm
transactioninfo.pyc	29718	0644	edit dl rm
transactioninfo.pyo	29718	0644	edit dl rm
update_md.py	24714	0755	edit dl rm
update_md.pyc	21296	0644	edit dl rm
update_md.pyo	21296	0644	edit dl rm
yumRepo.py	75978	0755	edit dl rm
yumRepo.pyc	59618	0644	edit dl rm
yumRepo.pyo	59618	0644	edit dl rm
__init__.py	239205	0755	edit dl rm
__init__.pyc	156538	0644	edit dl rm
__init__.pyo	156365	0644	edit dl rm

Edit: /usr/lib/python2.6/site-packages/yum/parser.py (7807B)

#! /usr/bin/python -tt
import re
import urlparse
import urlgrabber
import os.path

import Errors

_KEYCRE = re.compile(r"\$(\w+)")

def varReplace(raw, vars):
    '''Perform variable replacement

@param raw: String to perform substitution on.  
    @param vars: Dictionary of variables to replace. Key is variable name
        (without $ prefix). Value is replacement string.
    @return: Input raw string with substituted values.
    '''

if not vars:
        return raw
    done = []                      # Completed chunks to return

while raw:
        m = _KEYCRE.search(raw)
        if not m:
            done.append(raw)
            break

# Determine replacement value (if unknown variable then preserve
        # original)
        varname = m.group(1).lower()
        replacement = vars.get(varname, m.group())

start, end = m.span()
        done.append(raw[:start])    # Keep stuff leading up to token
        done.append(replacement)    # Append replacement value
        raw = raw[end:]             # Continue with remainder of string

return ''.join(done)

class ConfigPreProcessor:
    """
    ConfigParser Include Pre-Processor

File-like Object capable of pre-processing include= lines for
    a ConfigParser.

The readline function expands lines matching include=(url)
    into lines from the url specified. Includes may occur in
    included files as well.

Suggested Usage::
        cfg = ConfigParser.ConfigParser()
        fileobj = confpp( fileorurl )
        cfg.readfp(fileobj)
    """
    
    
    def __init__(self, configfile, vars=None):
        # put the vars away in a helpful place
        self._vars = vars

# used to track the current ini-section
        self._section = None
        
        # set some file-like object attributes for ConfigParser
        # these just make confpp look more like a real file object.
        self.mode = 'r' 
        
        # first make configfile a url even if it points to 
        # a local file
        scheme = urlparse.urlparse(configfile)[0]
        if scheme == '':
            # check it to make sure it's not a relative file url
            if configfile[0] != '/':
                configfile = os.getcwd() + '/' + configfile
            url = 'file://' + configfile
        else:
            url = configfile
        
        # these are used to maintain the include stack and check
        # for recursive/duplicate includes
        self._incstack = []
        self._alreadyincluded = []
        
        # _pushfile will return None if he couldn't open the file
        fo = self._pushfile( url )
        if fo is None: 
            raise Errors.ConfigError, 'Error accessing file: %s' % url
        
    def readline( self, size=0 ):
        """
        Implementation of File-Like Object readline function. This should be
        the only function called by ConfigParser according to the python docs.
        We maintain a stack of real FLOs and delegate readline calls to the 
        FLO on top of the stack. When EOF occurs on the topmost FLO, it is 
        popped off the stack and the next FLO takes over. include= lines 
        found anywhere cause a new FLO to be opened and pushed onto the top 
        of the stack. Finally, we return EOF when the bottom-most (configfile
        arg to __init__) FLO returns EOF.
        
        Very Technical Pseudo Code::
        
            def confpp.readline() [this is called by ConfigParser]
                open configfile, push on stack
                while stack has some stuff on it
                    line = readline from file on top of stack
                    pop and continue if line is EOF
                    if line starts with 'include=' then
                        error if file is recursive or duplicate
                        otherwise open file, push on stack
                        continue
                    else
                        return line
                
                return EOF
        """
        
        # set line to EOF initially. 
        line=''
        while len(self._incstack) > 0:
            # peek at the file like object on top of the stack
            fo = self._incstack[-1]
            line = fo.readline()
            if len(line) > 0:
                m = re.match( r'\s*include\s*=\s*(?P<url>.*)', line )
                if m:
                    url = m.group('url')
                    if len(url) == 0:
                        raise Errors.ConfigError, \
                             'Error parsing config %s: include must specify file to include.' % (self.name)
                    else:
                        # whooohoo a valid include line.. push it on the stack
                        url = varReplace(url, self._vars)
                        fo = self._pushfile( url )
                else:
                    # check if the current line starts a new section
                    secmatch = re.match( r'\s*\[(?P<section>.*)\]', line )
                    if secmatch:
                        self._section = secmatch.group('section')
                    # line didn't match include=, just return it as is
                    # for the ConfigParser
                    break
            else:
                # the current file returned EOF, pop it off the stack.
                self._popfile()
        
        # at this point we have a line from the topmost file on the stack
        # or EOF if the stack is empty
        return varReplace(line, self._vars)
    
    
    def _absurl( self, url ):
        """
        Returns an absolute url for the (possibly) relative
        url specified. The base url used to resolve the
        missing bits of url is the url of the file currently
        being included (i.e. the top of the stack).
        """
        
        if len(self._incstack) == 0:
            # it's the initial config file. No base url to resolve against.
            return url
        else:
            return urlparse.urljoin( self.geturl(), url )

def _pushfile( self, url ):
        """
        Opens the url specified, pushes it on the stack, and 
        returns a file like object. Returns None if the url 
        has previously been included.
        If the file can not be opened this function exits.
        """
        
        # absolutize this url using the including files url
        # as a base url.
        absurl = self._absurl(url)

# get the current section to add it to the included
        # url's name.
        includetuple = (absurl, self._section)
        # check if this has previously been included.
        if self._isalreadyincluded(includetuple):
            return None
        try:
            fo = urlgrabber.grabber.urlopen(absurl)
        except urlgrabber.grabber.URLGrabError, e:
            fo = None
        if fo is not None:
            self.name = absurl
            self._incstack.append( fo )
            self._alreadyincluded.append(includetuple)
        else:
            raise Errors.ConfigError, \
                  'Error accessing file for config %s' % (absurl)

return fo
    
    
    def _popfile( self ):
        """
        Pop a file off the stack signaling completion of including that file.
        """
        fo = self._incstack.pop()
        fo.close()
        if len(self._incstack) > 0:
            self.name = self._incstack[-1].geturl()
        else:
            self.name = None
    
    
    def _isalreadyincluded( self, tuple ):
        """
        Checks if the tuple describes an include that was already done.
        This does not necessarily have to be recursive
        """
        for etuple in self._alreadyincluded:
            if etuple == tuple: return 1
        return 0
    
    
    def geturl(self): return self.name

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