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import os
import string
import re
# TODO:
# indexed lookups by package at least, maybe by arbitrary field
class DebianControlParser:
def __init__(self):
self.stanzas = []
self.index = {}
def makeindex(self,field):
self.index[field] = {}
for stanza in self.stanzas:
self.index[field][getattr(stanza,field)] = stanza
class DebianControlStanza:
sourceversionre = re.compile('\((?P<version>.*).*\)')
def __init__(self,str):
field = None
for line in str.split('\n'):
if not line:
break
if line[0] == ' ':
if not field:
# XXX, raise an exception
pass
else:
setattr(self, field,
getattr(self, field) + '\n' + line)
else:
colon = line.find(':')
field = line[:colon]
value = line[colon+1:].lstrip()
setattr(self, field, value)
def source(self):
if hasattr(self, 'Source'):
return self.Source.split(' ')[0]
else:
return self.Package
def sourceversion(self):
if hasattr(self, 'Source'):
m = self.sourceversionre.search(self.Source)
if m:
return m.group('version')
if hasattr(self, 'Version'):
return self.Version
return None
def installed(self):
if hasattr(self, 'Status'):
return self.Status.split(' ')[2] == 'installed'
return 0
def readfile(self,file):
for chunk in open(file, 'r').read().split('\n\n'):
if chunk:
self.stanzas.append(self.DebianControlStanza(chunk))
def readdeb(self,deb):
fh=os.popen('dpkg-deb -f %s' % deb)
self.stanzas.append(self.DebianControlStanza(fh.read()))
def find(self,field,value):
if self.index.has_key(field):
return self.index[field][value]
else:
for stanza in self.stanzas:
if hasattr(stanza,field) and getattr(stanza,field) == value:
return stanza
return None
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