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https://github.com/tahoe-lafs/tahoe-lafs.git
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263 lines
12 KiB
Python
263 lines
12 KiB
Python
from distutils.errors import DistutilsSetupError
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from setuptools import Command
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import sys
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class scriptsetup(Command):
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action = (sys.platform == "win32"
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and "set up .pyscript association and PATHEXT variable to run scripts"
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or "this does nothing on non-Windows platforms")
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user_options = [
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('allusers', 'a',
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'make changes for all users of this Windows installation (requires Administrator privileges)'),
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]
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boolean_options = ['allusers']
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def initialize_options(self):
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self.allusers = False
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def finalize_options(self):
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pass
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def run(self):
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if sys.platform != "win32":
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print "\n'scriptsetup' isn't needed on non-Windows platforms."
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else:
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do_scriptsetup(self.allusers)
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def do_scriptsetup(allusers=False):
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print "\nSetting up environment to run scripts for %s..." % (allusers and "all users" or "the current user")
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from _winreg import HKEY_CURRENT_USER, HKEY_LOCAL_MACHINE, HKEY_CLASSES_ROOT, \
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REG_SZ, REG_EXPAND_SZ, KEY_QUERY_VALUE, KEY_SET_VALUE, \
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OpenKey, CreateKey, QueryValueEx, SetValueEx, FlushKey, CloseKey
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USER_ENV = "Environment"
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try:
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user_env = OpenKey(HKEY_CURRENT_USER, USER_ENV, 0, KEY_QUERY_VALUE)
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except WindowsError, e:
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raise DistutilsSetupError("I could not read the user environment from the registry.\n%r" % (e,))
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SYSTEM_ENV = "SYSTEM\\CurrentControlSet\\Control\\Session Manager\\Environment"
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try:
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system_env = OpenKey(HKEY_LOCAL_MACHINE, SYSTEM_ENV, 0, KEY_QUERY_VALUE)
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except WindowsError, e:
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raise DistutilsSetupError("I could not read the system environment from the registry.\n%r" % (e,))
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# HKEY_CLASSES_ROOT is a merged view that would only confuse us.
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# <http://technet.microsoft.com/en-us/library/cc739822(WS.10).aspx>
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USER_CLASSES = "SOFTWARE\\Classes"
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try:
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user_classes = OpenKey(HKEY_CURRENT_USER, USER_CLASSES, 0, KEY_QUERY_VALUE)
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except WindowsError, e:
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raise DistutilsSetupError("I could not read the user filetype associations from the registry.\n%r" % (e,))
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SYSTEM_CLASSES = "SOFTWARE\\Classes"
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try:
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system_classes = OpenKey(HKEY_LOCAL_MACHINE, SYSTEM_CLASSES, 0, KEY_QUERY_VALUE)
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except WindowsError, e:
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raise DistutilsSetupError("I could not read the system filetype associations from the registry.\n%r" % (e,))
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def query(key, subkey, what):
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try:
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(value, type) = QueryValueEx(key, subkey)
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except WindowsError, e:
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if e.winerror == 2: # not found
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return None
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raise DistutilsSetupError("I could not read %s from the registry.\n%r" % (what, e))
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# It does not matter that we don't expand environment strings, in fact it's better not to.
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if type != REG_SZ and type != REG_EXPAND_SZ:
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raise DistutilsSetupError("I expected the registry entry for %s to have a string type (REG_SZ or REG_EXPAND_SZ), "
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"and was flummoxed by it having type code %r." % (what, type))
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return (value, type)
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def open_and_query(key, path, subkey, what):
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try:
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read_key = OpenKey(key, path, 0, KEY_QUERY_VALUE)
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except WindowsError, e:
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if e.winerror == 2: # not found
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return None
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raise DistutilsSetupError("I could not read %s from the registry because I could not open "
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"the parent key.\n%r" % (what, e))
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try:
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return query(read_key, subkey, what)
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finally:
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CloseKey(read_key)
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def update(key_name_path, subkey, desired_value, desired_type, goal, what):
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(key, name, path) = key_name_path
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(old_value, old_type) = open_and_query(key, path, subkey, what) or (None, None)
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if (old_value, old_type) == (desired_value, desired_type):
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print "Already done: %s." % (goal,)
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return False
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try:
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update_key = OpenKey(key, path, 0, KEY_SET_VALUE|KEY_QUERY_VALUE)
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except WindowsError, e:
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if e.winerror != 2:
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raise DistutilsSetupError("I tried to %s, but was not successful because I could not open "
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"the registry key %s\\%s for writing.\n%r"
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% (goal, name, path, e))
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try:
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update_key = CreateKey(key, path)
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except WindowsError, e:
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raise DistutilsSetupError("I tried to %s, but was not successful because the registry key %s\\%s "
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"did not exist, and I was unable to create it.\n%r"
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% (goal, name, path, e))
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(new_value, new_type) = (None, None)
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try:
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SetValueEx(update_key, subkey, 0, desired_type, desired_value)
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except WindowsError, e:
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raise DistutilsSetupError("I tried to %s, but was not able to set the subkey %r under %s\\%s to be %r.\n%r"
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% (goal, subkey, name, path, desired_value))
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else:
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(new_value, new_type) = query(update_key, subkey, what) or (None, None)
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finally:
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FlushKey(update_key)
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CloseKey(update_key)
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if (new_value, new_type) != (desired_value, desired_type):
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raise DistutilsSetupError("I tried to %s by setting the subkey %r under %s\\%s to be %r, "
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"and the call to SetValueEx succeeded, but the value ended up as "
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"%r instead (it was previously %r). Maybe the update was unexpectedly virtualized?"
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% (goal, subkey, name, path, desired_value, new_value, old_value))
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print "Done: %s." % (goal,)
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return True
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# Maintenance hazard: 'add_to_environment' and 'associate' use very similar, but not identical logic.
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def add_to_environment(varname, addition, change_allusers):
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changed = False
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what = "the %s environment variable %s" % (change_allusers and "system" or "user", varname)
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goal = "add %s to %s" % (addition, what)
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system_valueandtype = query(system_env, varname, "the system environment variable %s" % (varname,))
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user_valueandtype = query(user_env, varname, "the user environment variable %s" % (varname,))
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if change_allusers:
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(value, type) = system_valueandtype or (u'', REG_SZ)
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key_name_path = (HKEY_LOCAL_MACHINE, "HKEY_LOCAL_MACHINE", SYSTEM_ENV)
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else:
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(value, type) = user_valueandtype or system_valueandtype or (u'', REG_SZ)
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key_name_path = (HKEY_CURRENT_USER, "HKEY_CURRENT_USER", USER_ENV)
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if addition.lower() in value.lower().split(u';'):
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print "Already done: %s." % (goal,)
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else:
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changed |= update(key_name_path, varname, value + u';' + addition, type, goal, what)
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if change_allusers:
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# Also change any overriding environment entry for the current user.
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(user_value, user_type) = user_valueandtype or (u'', REG_SZ)
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split_value = user_value.lower().split(u';')
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if not (addition.lower() in split_value or u'%'+varname.lower()+u'%' in split_value):
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now_what = "the overriding user environment variable %s" % (varname,)
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changed |= update((HKEY_CURRENT_USER, "HKEY_CURRENT_USER", USER_ENV),
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varname, user_value + u';' + addition, user_type,
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"add %s to %s" % (addition, now_what), now_what)
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return changed
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def associate(ext, target, change_allusers):
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changed = False
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what = "the %s association for %s" % (change_allusers and "system" or "user", ext)
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goal = "associate the filetype %s with %s for %s" % (ext, target, change_allusers and "all users" or "the current user")
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try:
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if change_allusers:
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target_key = OpenKey(HKEY_LOCAL_MACHINE, "%s\\%s" % (SYSTEM_CLASSES, target), 0, KEY_QUERY_VALUE)
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else:
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target_key = OpenKey(HKEY_CLASSES_ROOT, target, 0, KEY_QUERY_VALUE)
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except WindowsError, e:
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raise DistutilsSetupError("I was going to %s, but that won't work because the %s class does not exist in the registry, "
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"as far as I can tell.\n%r" % (goal, target, e))
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CloseKey(target_key)
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system_key_name_path = (HKEY_LOCAL_MACHINE, "HKEY_LOCAL_MACHINE", "%s\\%s" % (SYSTEM_CLASSES, ext))
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user_key_name_path = (HKEY_CURRENT_USER, "HKEY_CURRENT_USER", "%s\\%s" % (USER_CLASSES, ext))
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system_valueandtype = open_and_query(system_classes, ext, "", "the system association for %s" % (ext,))
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user_valueandtype = open_and_query(user_classes, ext, "", "the user association for %s" % (ext,))
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if change_allusers:
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(value, type) = system_valueandtype or (u'', REG_SZ)
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key_name_path = system_key_name_path
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else:
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(value, type) = user_valueandtype or system_valueandtype or (u'', REG_SZ)
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key_name_path = user_key_name_path
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if value == target:
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print "Already done: %s." % (goal,)
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else:
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changed |= update(key_name_path, "", unicode(target), REG_SZ, goal, what)
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if change_allusers:
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# Also change any overriding association for the current user.
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(user_value, user_type) = user_valueandtype or (u'', REG_SZ)
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if user_value != target:
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changed |= update(user_key_name_path, "", unicode(target), REG_SZ,
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"associate the filetype %s with %s for the current user " \
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"(because the system association is overridden)" % (ext, target),
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"the overriding user association for %s" % (ext,))
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return changed
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def broadcast_settingchange(change_allusers):
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print "Broadcasting that the environment has changed, please wait..."
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# <http://support.microsoft.com/kb/104011/en-us>
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# <http://msdn.microsoft.com/en-us/library/ms644952(VS.85).aspx>
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# LRESULT WINAPI SendMessageTimeoutW(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam,
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# UINT fuFlags, UINT uTimeout, PDWORD_PTR lpdwResult);
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try:
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from ctypes import WINFUNCTYPE, POINTER, windll, addressof, c_wchar_p
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from ctypes.wintypes import LONG, HWND, UINT, WPARAM, LPARAM, DWORD
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SendMessageTimeout = WINFUNCTYPE(POINTER(LONG), HWND, UINT, WPARAM, LPARAM, UINT, UINT, POINTER(POINTER(DWORD))) \
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(("SendMessageTimeoutW", windll.user32))
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HWND_BROADCAST = 0xFFFF
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WM_SETTINGCHANGE = 0x001A
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SMTO_ABORTIFHUNG = 0x0002
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SendMessageTimeout(HWND_BROADCAST, WM_SETTINGCHANGE, change_allusers and 1 or 0,
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addressof(c_wchar_p(u"Environment")), SMTO_ABORTIFHUNG, 5000, None);
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except Exception, e:
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print "Warning: %r" % (e,)
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changed_assoc = associate(".pyscript", "Python.File", allusers)
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changed_env = False
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try:
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changed_env |= add_to_environment("PATHEXT", ".pyscript", allusers)
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changed_env |= add_to_environment("PATHEXT", ".pyw", allusers)
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finally:
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CloseKey(user_env)
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CloseKey(system_env)
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if changed_assoc or changed_env:
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broadcast_settingchange(allusers)
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if changed_env:
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print "\n" \
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"Changes have been made to the persistent environment, but not\n" \
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"in this Command Prompt. Running installed Python scripts will\n" \
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"only work from new Command Prompts opened from now on.\n"
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