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# Copyright 2008 The Tor Project, Inc. See LICENSE for licensing information.
import os
def getItemsFromPackage(pkg):
"""Given a Thandy package decoded from its json format, return a dict
with an entry for each installable item in the path, mapping the
item's relative path to a PackageItem object that can check or
install that item.
"""
result = {}
format = pkg.get('format')
for item in pkg['files']:
relPath = item[0]
if len(item) >= 3:
extra = item[2]
else:
extra = {}
checker = getChecker(relPath, extra, defaultFormat=format,
package=pkg)
installer = getInstaller(relPath, extra,
defaultFormat=format, package=pkg)
result[relPath] = PackageItem(relPath, checker, installer)
return result
def getChecker(relPath, extra, defaultFormat, package):
"""Return a Checker instance for an item in a package, or None if we
don't know how to check that item.
relPath -- the item's relative path in the repository.
extra -- the info part of the item's entry in the package.
defaultFormat -- the value of the package's "format" field.
Only used for obsolete checker types.
package -- the package object itself. Only used for obsolete
checker types.
"""
checkType = extra.get("check_type")
if checkType == None:
# This part is for obsolete packages.
if defaultFormat == 'rpm':
import thandy.packagesys.RPMPackages
return thandy.packagesys.RPMPackages.RPMChecker(
os.path.split(relPath)[1],
extra['rpm_version'])
elif defaultFormat == 'exe':
if extra.has_key('registry_ent'):
import thandy.packagesys.ExePackages
k,v=extra['registry_ent']
return thandy.packagesys.ExePackages.RegistryChecker(k, v)
else:
import thandy.packagesys.PackageDB
return thandy.packagesys.PackageDB.DBChecker(
package['name'], package['version'])
else:
return None
elif checkType == 'rpm':
import thandy.packagesys.RPMPackages
return thandy.packagesys.RPMPackages.RPMChecker(
os.path.split(relPath)[1],
extra['rpm_version'])
elif checkType == 'db':
import thandy.packagesys.PackageDB
return thandy.packagesys.PackageDB.DBChecker(
extra['item_name'], extra['item_version'])
elif checkType == 'registry':
import thandy.packagesys.ExePackages
k,v=extra['registry_ent']
return thandy.packagesys.ExePackages.RegistryChecker(k,v)
else:
return None
def getInstaller(relPath, extra, defaultFormat, package):
"""Return an Installer for an item in a package, or None if we don't
know how to install that item. Arguments are as for getChecker().
"""
installType = extra.get("install_type")
if installType == None:
# This part is for obsolete packages.
if defaultFormat == 'rpm':
import thandy.packagesys.RPMPackages
return thandy.packagesys.RPMPackages.RPMInstaller(
relPath, os.path.split(relPath)[1])
elif defaultFormat == 'exe':
import thandy.packagesys.ExePackages
installer = thandy.packagesys.ExePackages.CommandInstaller(
relPath, [ "${FILE}" ] + extra.get('exe_args', []))
if not extra.has_key('registry_ent'):
import thandy.packagesys.PackageDB
installer = thandy.packagesys.PackageDB.DBInstaller(
package['name'], package['version'], relPath, installer)
return installer
else:
return None
elif installType == 'rpm':
import thandy.packagesys.RPMPackages
installer = thandy.packagesys.RPMPackages.RPMInstaller(
relPath, os.path.split(relPath)[1])
elif installType == 'command':
import thandy.packagesys.ExePackages
installer = thandy.packagesys.ExePackages.CommandInstaller(
relPath, extra['cmd_install'], extra.get('cmd_remove'))
else:
return None
if extra.get('check_type') == 'db':
import thandy.packagesys.PackageDB
installer = thandy.packagesys.PackageDB.DBInstaller(
extra['item_name'], extra['item_version'], installer)
return installer
class PackageItem:
"""Represents a single item from a package."""
def __init__(self, relativePath, checker, installer):
self._relPath = relativePath
self._checker = checker
self._installer = installer
def getRelativePath(self):
"""DOCDOC"""
return self._relPath
def setTransaction(self, transaction):
"""Set the transaction context for this item to 'transaction'.
"""
if self._checker is not None:
self._checker.setTransaction(transaction)
if self._installer is not None:
self._installer.setTransaction(transaction)
def setCacheRoot(self, cacheRoot):
"""Tell this item to look for files relative to 'cacheRoot'."""
if self._installer is not None:
self._installer.setCacheRoot(cacheRoot)
def canCheck(self):
"""Return true iff we know how to check if this item is installed."""
return self._checker != None
def canInstall(self):
"""Return true iff we know how to install this item."""
return self._installer != None
def getChecker(self):
return self._checker
def getInstaller(self):
return self._installer
class Checker:
"""Abstract base class. A Checker knows how to detect whether a given
installable item is installed, and how to tell what version is installed.
All version checking functions may raise CheckNotSupported if they need
an OS-dependent package detection mechanism that we don't have.
Examples include checking the Windows Registry on a non-win32 platform.
"""
def __init__(self):
self._transaction = None
def setTransaction(self, transaction):
"""Associate this Checker with a given transaction. Future actions
will take place in the given transaction context, if this Checker
supports transactions.
"""
self._transaction = transaction
# def checkInstall(self):
# raise NotImplemented()
def anyVersionInstalled(self):
"""Return true iff any version of this item is installed."""
raise len(self.getInstalledVersions()) > 1
def getInstalledVersions(self):
"""Return a list of all versions of this item that are
installed. Version types are item-dependent: a tuple or a
string is most common.
"""
raise NotImplemented()
def isInstalled(self):
"""Return true iff this particular version of this item is installed.
"""
raise NotImplemented()
class Installer:
"""Abstract base class. An Installer knows how to install or remove an
installable item.
"""
def __init__(self, relativePath):
self._transaction = None
self._cacheRoot = None
self._relPath = relativePath
def setTransaction(self, transaction):
"""Associate this Installer with a given transaction. Future actions
will take place in the given transaction context, if this Checker
supports transactions.
"""
self._transaction = transaction
def setCacheRoot(self, cacheRoot):
"""Associate this Installer with a given cache root directory. It
looks for downloaded files under this directory.
"""
self._cacheRoot = cacheRoot
def getFilename(self):
"""Return the absolute pathname for this installable item as cached
on disk.
"""
rp = self._relPath
if rp.startswith('/'):
rp = rp[1:]
return os.path.normpath(os.path.join(self._cacheRoot, rp))
def install(self):
"""Install the item from the cache. May raise InstallFailed if we
the installation failed.
"""
raise NotImplemented()
def remove(self):
"""Remove the installed item. May raise RemoveNotSupported"""
raise NotImplemented()
def getInstallResult(self):
"DOCDOC params, manifest"
return None, None
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