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# Copyright 2008 The Tor Project, Inc. See LICENSE for licensing information.
import anydbm
import shelve
import thandy.util
import thandy.formats
class SimplePackageDB:
def __init__(self, filename):
self._db = anydbm.open(filename, 'c')
def setVersion(self, package, version, filelist):
pass
def setInstallParameters(self, package, params):
pass
def getCurVersion(self, package):
pass
def getInstallParameters(self, package):
pass
class DBBackedPackageSystem(thandy.packagesys.PackageSystem):
def __init__(self, packageDB):
self._packageDB = packageDB
class DBBackedPackageHandle(thandy.packagesys.PackageHandle):
def __init__(self, packageDB, name, version, filelist):
thandy.packagesys.PackageSystem.PackageHandle.__init__(self)
self._packageDB = packageDB
self._name = name
self._version = version
self._filelist = filelist
self._metaData = None
def _getInstallBase(self):
raise NotImplemented()
def anyVersionInstalled(self, transaction=None):
return self._packageDB.getCurVersion(self._name) != None
def getInstalledVersion(self, transaction=None):
return self._packageDB.getCurVersion(self._name)
def install(self):
params = self._doInstall()
self._packageDB.setCurVersion(
self._name, self._version, self._filelist)
self._packageDB.setInstallParameters(self._name, params)
def _doInstall(self):
raise NotImplemented()
def isInstalled(self):
return self.getInstalledVersion(self, transaction) == self._version
def checkInstall(self):
base = self._getInstallBase()
all_ok = True
for fn, hash in self._filelist:
fn = os.path.join(base, fn)
if not os.path.exists(fn):
all_ok = False
else:
f = open(fn, 'rb')
try:
try:
d = thandy.formats.getFileDigest(f)
except OSError:
all_ok = False
break
finally:
f.close()
return all_ok
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