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#
# Copyright (C) 2002 Manuel Estrada Sainz <ranty@debian.org>
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of version 2.1 of the GNU Lesser General Public
# License as published by the Free Software Foundation.
#
# This library 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
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
import apt_pkg, apt_inst, sys, os, stat
from os.path import dirname, basename
import re, shelve, shutil, fcntl
from twisted.internet import process
import apt_proxy, copy, UserDict
from misc import log
aptpkg_dir='.apt-proxy'
apt_pkg.InitSystem()
class AptDpkgInfo(UserDict.UserDict):
"""
Gets control fields from a .deb file.
And then behaves like a regular python dictionary.
See AptPackages.get_mirror_path
"""
def __init__(self, filename):
UserDict.UserDict.__init__(self)
try:
filehandle = open(filename);
try:
self.control = apt_inst.debExtractControl(filehandle)
finally:
# Make sure that file is always closed.
filehandle.close()
except SystemError:
log.debug("Had problems reading: %s"%(filename), 'AptDpkgInfo')
raise
for line in self.control.split('\n'):
if line.find(': ') != -1:
key, value = line.split(': ', 1)
self.data[key] = value
class PackageFileList:
"""
Manages a list of package files belonging to a backend
"""
def __init__(self, backendName, cache_dir):
self.cache_dir = cache_dir
self.packagedb_dir = cache_dir+'/'+ apt_proxy.status_dir + \
'/backends/' + backendName
if not os.path.exists(self.packagedb_dir):
os.makedirs(self.packagedb_dir)
self.packages = None
self.open()
def open(self):
if self.packages is None:
self.packages = shelve.open(self.packagedb_dir+'/packages.db')
def close(self):
if self.packages is not None:
self.packages.close()
def update_file(self, entry):
"""
Called from apt_proxy.py when files get updated so we can update our
fake lists/ directory and sources.list.
@param entry CacheEntry for cached file
"""
if entry.filename=="Packages" or entry.filename=="Release":
log.msg("Registering package file: "+entry.cache_path, 'apt_pkg', 4)
stat_result = os.stat(entry.file_path)
self.packages[entry.cache_path] = stat_result
def get_files(self):
"""
Get list of files in database. Each file will be checked that it exists
"""
files = self.packages.keys()
#print self.packages.keys()
for f in files:
if not os.path.exists(self.cache_dir + os.sep + f):
log.debug("File in packages database has been deleted: "+f, 'apt_pkg')
del files[files.index(f)]
del self.packages[f]
return files
class AptPackages:
"""
Uses AptPackagesServer to answer queries about packages.
Makes a fake configuration for python-apt for each backend.
"""
DEFAULT_APT_CONFIG = {
#'APT' : '',
'APT::Architecture' : apt_pkg.CPU,
#'APT::Default-Release' : 'unstable',
'Dir':'.', # /
'Dir::State' : 'apt/', # var/lib/apt/
'Dir::State::Lists': 'lists/', # lists/
#'Dir::State::cdroms' : 'cdroms.list',
'Dir::State::userstatus' : 'status.user',
'Dir::State::status': 'dpkg/status', # '/var/lib/dpkg/status'
'Dir::Cache' : '.apt/cache/', # var/cache/apt/
#'Dir::Cache::archives' : 'archives/',
'Dir::Cache::srcpkgcache' : 'srcpkgcache.bin',
'Dir::Cache::pkgcache' : 'pkgcache.bin',
'Dir::Etc' : 'apt/etc/', # etc/apt/
'Dir::Etc::sourcelist' : 'sources.list',
'Dir::Etc::vendorlist' : 'vendors.list',
'Dir::Etc::vendorparts' : 'vendors.list.d',
#'Dir::Etc::main' : 'apt.conf',
#'Dir::Etc::parts' : 'apt.conf.d',
#'Dir::Etc::preferences' : 'preferences',
'Dir::Bin' : '',
#'Dir::Bin::methods' : '', #'/usr/lib/apt/methods'
'Dir::Bin::dpkg' : '/usr/bin/dpkg',
#'DPkg' : '',
#'DPkg::Pre-Install-Pkgs' : '',
#'DPkg::Tools' : '',
#'DPkg::Tools::Options' : '',
#'DPkg::Tools::Options::/usr/bin/apt-listchanges' : '',
#'DPkg::Tools::Options::/usr/bin/apt-listchanges::Version' : '2',
#'DPkg::Post-Invoke' : '',
}
essential_dirs = ('apt', 'apt/cache', 'apt/dpkg', 'apt/etc', 'apt/lists',
'apt/lists/partial')
essential_files = ('apt/dpkg/status', 'apt/etc/sources.list',)
def __init__(self, backendName, cache_dir):
"""
Construct new packages manager
backend: Name of backend associated with this packages file
cache_dir: cache directory from config file
"""
self.backendName = backendName
self.cache_dir = cache_dir
self.apt_config = copy.deepcopy(self.DEFAULT_APT_CONFIG)
self.status_dir = (cache_dir+'/'+ aptpkg_dir
+'/backends/'+backendName)
for dir in self.essential_dirs:
path = self.status_dir+'/'+dir
if not os.path.exists(path):
os.makedirs(path)
for file in self.essential_files:
path = self.status_dir+'/'+file
if not os.path.exists(path):
f = open(path,'w')
f.close()
del f
self.apt_config['Dir'] = self.status_dir
self.apt_config['Dir::State::status'] = self.status_dir + '/apt/dpkg/status'
#os.system('find '+self.status_dir+' -ls ')
#print "status:"+self.apt_config['Dir::State::status']
self.packages = PackageFileList(backendName, cache_dir)
self.loaded = 0
#print "Loaded aptPackages [%s] %s " % (self.backendName, self.cache_dir)
def __del__(self):
self.cleanup()
#print "start aptPackages [%s] %s " % (self.backendName, self.cache_dir)
self.packages.close()
#print "Deleted aptPackages [%s] %s " % (self.backendName, self.cache_dir)
def file_updated(self, entry):
"""
A file in the backend has changed. If this affects us, unload our apt database
"""
if self.packages.update_file(entry):
self.unload()
def __save_stdout(self):
self.real_stdout_fd = os.dup(1)
os.close(1)
def __restore_stdout(self):
os.dup2(self.real_stdout_fd, 1)
os.close(self.real_stdout_fd)
del self.real_stdout_fd
def load(self):
"""
Regenerates the fake configuration and load the packages server.
"""
if self.loaded: return True
apt_pkg.InitSystem()
#print "Load:", self.status_dir
shutil.rmtree(self.status_dir+'/apt/lists/')
os.makedirs(self.status_dir+'/apt/lists/partial')
sources_filename = self.status_dir+'/'+'apt/etc/sources.list'
sources = open(sources_filename, 'w')
sources_count = 0
for file in self.packages.get_files():
# we should probably clear old entries from self.packages and
# take into account the recorded mtime as optimization
filepath = self.cache_dir + file
fake_uri='http://apt-proxy/'+file
source_line='deb '+dirname(fake_uri)+'/ /'
listpath=(self.status_dir+'/apt/lists/'
+apt_pkg.URItoFileName(fake_uri))
sources.write(source_line+'\n')
log.debug("Sources line: " + source_line, 'apt_pkg')
sources_count = sources_count + 1
try:
#we should empty the directory instead
os.unlink(listpath)
except:
pass
os.symlink('../../../../../'+file, listpath)
sources.close()
if sources_count == 0:
log.msg("No Packages files available for %s backend"%(self.backendName), 'apt_pkg')
return False
log.msg("Loading Packages database for "+self.status_dir,'apt_pkg')
#apt_pkg.Config = apt_pkg.newConfiguration(); #-- this causes unit tests to fail!
for key, value in self.apt_config.items():
apt_pkg.Config[key] = value
# print "apt_pkg config:"
# for I in apt_pkg.Config.keys():
# print "%s \"%s\";"%(I,apt_pkg.Config[I]);
if log.isEnabled('apt'):
self.cache = apt_pkg.GetCache()
else:
# apt_pkg prints progress messages to stdout, disable
self.__save_stdout()
try:
self.cache = apt_pkg.GetCache()
finally:
self.__restore_stdout()
self.records = apt_pkg.GetPkgRecords(self.cache)
#for p in self.cache.Packages:
# print p
#log.debug("%s packages found" % (len(self.cache)),'apt_pkg')
self.loaded = 1
return True
def unload(self):
"Tries to make the packages server quit."
if self.loaded:
del self.cache
del self.records
self.loaded = 0
def cleanup(self):
self.unload()
def get_mirror_path(self, name, version):
"Find the path for version 'version' of package 'name'"
if not self.load(): return None
try:
for pack_vers in self.cache[name].VersionList:
if(pack_vers.VerStr == version):
file, index = pack_vers.FileList[0]
self.records.Lookup((file,index))
path = self.records.FileName
if len(path)>2 and path[0:2] == './':
path = path[2:] # Remove any leading './'
return path
except KeyError:
pass
return None
def get_mirror_versions(self, package_name):
"""
Find the available versions of the package name given
@type package_name: string
@param package_name: package name to search for e.g. ;apt'
@return: A list of mirror versions available
"""
vers = []
if not self.load(): return vers
try:
for pack_vers in self.cache[package_name].VersionList:
vers.append(pack_vers.VerStr)
except KeyError:
pass
return vers
def cleanup(factory):
for backend in factory.backends.values():
backend.get_packages_db().cleanup()
def get_mirror_path(factory, file):
"""
Look for the path of 'file' in all backends.
"""
info = AptDpkgInfo(file)
paths = []
for backend in factory.backends.values():
path = backend.get_packages_db().get_mirror_path(info['Package'],
info['Version'])
if path:
paths.append('/'+backend.base+'/'+path)
return paths
def get_mirror_versions(factory, package):
"""
Look for the available version of a package in all backends, given
an existing package name
"""
all_vers = []
for backend in factory.backends.values():
vers = backend.get_packages_db().get_mirror_versions(package)
for ver in vers:
path = backend.get_packages_db().get_mirror_path(package, ver)
all_vers.append((ver, "%s/%s"%(backend.base,path)))
return all_vers
def closest_match(info, others):
def compare(a, b):
return apt_pkg.VersionCompare(a[0], b[0])
others.sort(compare)
version = info['Version']
match = None
for ver,path in others:
if version <= ver:
match = path
break
if not match:
if not others:
return None
match = others[-1][1]
dirname=re.sub(r'/[^/]*$', '', match)
version=re.sub(r'^[^:]*:', '', info['Version'])
if dirname.find('/pool/') != -1:
return "/%s/%s_%s_%s.deb"%(dirname, info['Package'],
version, info['Architecture'])
else:
return "/%s/%s_%s.deb"%(dirname, info['Package'], version)
def import_directory(factory, dir, recursive=0):
"""
Import all files in a given directory into the cache
This is used by apt-proxy-import to import new files
into the cache
"""
imported_count = 0
if not os.path.exists(dir):
log.err('Directory ' + dir + ' does not exist', 'import')
return
if recursive:
log.msg("Importing packages from directory tree: " + dir, 'import',3)
for root, dirs, files in os.walk(dir):
for file in files:
imported_count += import_file(factory, root, file)
else:
log.debug("Importing packages from directory: " + dir, 'import',3)
for file in os.listdir(dir):
mode = os.stat(dir + '/' + file)[stat.ST_MODE]
if not stat.S_ISDIR(mode):
imported_count += import_file(factory, dir, file)
for backend in factory.backends.values():
backend.get_packages_db().unload()
log.msg("Imported %s files" % (imported_count))
return imported_count
def import_file(factory, dir, file):
"""
Import a .deb or .udeb into cache from given filename
"""
if file[-4:]!='.deb' and file[-5:]!='.udeb':
log.msg("Ignoring (unknown file type):"+ file, 'import')
return 0
log.debug("considering: " + dir + '/' + file, 'import')
try:
paths = get_mirror_path(factory, dir+'/'+file)
except SystemError:
log.msg(file + ' skipped - wrong format or corrupted', 'import')
return 0
if paths:
if len(paths) != 1:
log.debug("WARNING: multiple ocurrences", 'import')
log.debug(str(paths), 'import')
cache_path = paths[0]
else:
log.debug("Not found, trying to guess", 'import')
info = AptDpkgInfo(dir+'/'+file)
cache_path = closest_match(info,
get_mirror_versions(factory, info['Package']))
if cache_path:
log.debug("MIRROR_PATH:"+ cache_path, 'import')
src_path = dir+'/'+file
dest_path = factory.config.cache_dir+cache_path
if not os.path.exists(dest_path):
log.debug("IMPORTING:" + src_path, 'import')
dest_path = re.sub(r'/\./', '/', dest_path)
if not os.path.exists(dirname(dest_path)):
os.makedirs(dirname(dest_path))
f = open(dest_path, 'w')
fcntl.lockf(f.fileno(), fcntl.LOCK_EX)
f.truncate(0)
shutil.copy2(src_path, dest_path)
f.close()
if hasattr(factory, 'access_times'):
atime = os.stat(src_path)[stat.ST_ATIME]
factory.access_times[cache_path] = atime
log.msg(file + ' imported', 'import')
return 1
else:
log.msg(file + ' skipped - already in cache', 'import')
return 0
else:
log.msg(file + ' skipped - no suitable backend found', 'import')
return 0
def test(factory, file):
"Just for testing purposes, this should probably go to hell soon."
for backend in factory.backends:
backend.get_packages_db().load()
info = AptDpkgInfo(file)
path = get_mirror_path(factory, file)
print "Exact Match:"
print "\t%s:%s"%(info['Version'], path)
vers = get_mirror_versions(factory, info['Package'])
print "Other Versions:"
for ver in vers:
print "\t%s:%s"%(ver)
print "Guess:"
print "\t%s:%s"%(info['Version'], closest_match(info, vers))
if __name__ == '__main__':
from apt_proxy_conf import factoryConfig
class DummyFactory:
def debug(self, msg):
pass
factory = DummyFactory()
factoryConfig(factory)
test(factory,
'/home/ranty/work/apt-proxy/related/tools/galeon_1.2.5-1_i386.deb')
test(factory,
'/storage/apt-proxy/debian/dists/potato/main/binary-i386/base/'
+'libstdc++2.10_2.95.2-13.deb')
cleanup(factory)
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