tahoe-lafs/windows/registry.py
robk-tahoe 520cbb0165 first stab at windows build details.
there are many and various fiddly details that were involved in this process
on mountain view.  This is a stripped down version of the build process used
there.  there's hence a good chance that one or two necessary details got
stripped down through the cracks.

this provides a py2exe setup.py to build a tahoe.exe and a tahoesvc.exe
the former is equivalent to bin/tahoe, but without the start/stop commands.
the latter is a windows service that instantiates a client whose basedir
is found in the registry.
2008-01-09 19:01:56 -07:00

78 lines
2.2 KiB
Python

import sys
import _winreg
_AMD_KEY = r"Software\Allmydata"
_BDIR_KEY = 'Base Dir Path'
if sys.platform not in ('win32'):
raise ImportError, "registry cannot be used on non-windows systems"
class WindowsError(Exception): # stupid voodoo to appease pyflakes
pass
def get_registry_setting(key, name, _topkey=None):
"""
This function iterates through _topkey (if not None),
HKEY_CURRENT_USER, and HKEY_LOCAL_MACHINE before giving up.
@note: Only supports string values.
@param key: The key we are searching.
@type key: String
@param name: The name of the setting we are querying.
@type name: String
"""
topkeys = [_winreg.HKEY_CURRENT_USER, _winreg.HKEY_LOCAL_MACHINE]
if _topkey:
topkeys.insert(0, _topkey)
for topkey in topkeys:
try:
regkey = _winreg.OpenKey(topkey, key)
sublen, vallen, timestamp = _winreg.QueryInfoKey(regkey)
for validx in xrange(vallen):
keyname, value, keytype = _winreg.EnumValue(regkey, validx)
if keyname == name and keytype == _winreg.REG_SZ:
return value
except WindowsError:
continue
# We didn't find the key:
raise KeyError, (key, name, "registry setting not found")
def set_registry_setting(key, name, data, reg_type=_winreg.REG_SZ,
_topkey=_winreg.HKEY_LOCAL_MACHINE, create_key_if_missing=True):
"""
Sets a registry setting.
defaults to string values (REG_SZ) - overridable with reg_type.
"""
try:
regkey = _winreg.OpenKey(_topkey, key, 0, _winreg.KEY_SET_VALUE)
except WindowsError:
if create_key_if_missing:
regkey = _winreg.CreateKey(_topkey, key)
else:
raise KeyError, (key, "registry key not found")
try:
_winreg.DeleteValue(regkey, name)
except:
pass
_winreg.SetValueEx(regkey, name, 0, reg_type, data)
def get_registry_value(keyname):
"""
retrieves a registry key value from within the Software/Allmydata Inc key
"""
try:
return get_registry_setting(_AMD_KEY, keyname)
except KeyError:
return None
def get_base_dir_path():
return get_registry_value(_BDIR_KEY)