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electrum
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config: implement config upgrades. remove system config.

3.1
SomberNight 7 years ago
parent
58d889e480
commit
04a1809969
1 changed files with 90 additions and 52 deletions
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  1. 140
      lib/simple_config.py

140
lib/simple_config.py
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@ -5,13 +5,11 @@ import os
import stat
from copy import deepcopy
from .util import (user_dir, print_error, print_stderr, PrintError,
from .util import (user_dir, print_error, PrintError,
NoDynamicFeeEstimates)
from .bitcoin import MAX_FEE_RATE, FEE_TARGETS
SYSTEM_CONFIG_PATH = "/etc/electrum.conf"
config = None
@ -25,22 +23,26 @@ def set_config(c):
config = c
FINAL_CONFIG_VERSION = 2
class SimpleConfig(PrintError):
"""
The SimpleConfig class is responsible for handling operations involving
configuration files.
There are 3 different sources of possible configuration values:
There are two different sources of possible configuration values:
1. Command line options.
2. User configuration (in the user's config directory)
3. System configuration (in /etc/)
They are taken in order (1. overrides config options set in 2., that
override config set in 3.)
They are taken in order (1. overrides config options set in 2.)
"""
fee_rates = [5000, 10000, 20000, 30000, 50000, 70000, 100000, 150000, 200000, 300000]
def __init__(self, options={}, read_system_config_function=None,
read_user_config_function=None, read_user_dir_function=None):
def __init__(self, options=None, read_user_config_function=None,
read_user_dir_function=None):
if options is None:
options = {}
# This lock needs to be acquired for updating and reading the config in
# a thread-safe way.
@ -52,8 +54,6 @@ class SimpleConfig(PrintError):
# The following two functions are there for dependency injection when
# testing.
if read_system_config_function is None:
read_system_config_function = read_system_config
if read_user_config_function is None:
read_user_config_function = read_user_config
if read_user_dir_function is None:
@ -63,24 +63,30 @@ class SimpleConfig(PrintError):
# The command line options
self.cmdline_options = deepcopy(options)
# Portable wallets don't use a system config
if self.cmdline_options.get('portable', False):
self.system_config = {}
else:
self.system_config = read_system_config_function()
# don't allow to be set on CLI:
self.cmdline_options.pop('config_version', None)
# Set self.path and read the user config
self.user_config = {} # for self.get in electrum_path()
self.path = self.electrum_path()
self.user_config = read_user_config_function(self.path)
# Upgrade obsolete keys
self.fixup_keys({'auto_cycle': 'auto_connect'})
if not self.user_config:
# avoid new config getting upgraded
self.user_config = {'config_version': FINAL_CONFIG_VERSION}
# config "upgrade" - CLI options
self.rename_config_keys(
self.cmdline_options, {'auto_cycle': 'auto_connect'}, True)
# config upgrade - user config
if self.requires_upgrade():
self.upgrade()
# Make a singleton instance of 'self'
set_config(self)
def electrum_path(self):
# Read electrum_path from command line / system configuration
# Read electrum_path from command line
# Otherwise use the user's default data directory.
path = self.get('electrum_path')
if path is None:
@ -102,45 +108,92 @@ class SimpleConfig(PrintError):
self.print_error("electrum directory", path)
return path
def fixup_config_keys(self, config, keypairs):
def rename_config_keys(self, config, keypairs, deprecation_warning=False):
"""Migrate old key names to new ones"""
updated = False
for old_key, new_key in keypairs.items():
if old_key in config:
if not new_key in config:
if new_key not in config:
config[new_key] = config[old_key]
if deprecation_warning:
self.print_stderr('Note that the {} variable has been deprecated. '
'You should use {} instead.'.format(old_key, new_key))
del config[old_key]
updated = True
return updated
def fixup_keys(self, keypairs):
'''Migrate old key names to new ones'''
self.fixup_config_keys(self.cmdline_options, keypairs)
self.fixup_config_keys(self.system_config, keypairs)
if self.fixup_config_keys(self.user_config, keypairs):
self.save_user_config()
def set_key(self, key, value, save = True):
def set_key(self, key, value, save=True):
if not self.is_modifiable(key):
print_stderr("Warning: not changing config key '%s' set on the command line" % key)
self.print_stderr("Warning: not changing config key '%s' set on the command line" % key)
return
self._set_key_in_user_config(key, value, save)
def _set_key_in_user_config(self, key, value, save=True):
with self.lock:
if value is not None:
self.user_config[key] = value
else:
self.user_config.pop(key, None)
if save:
self.save_user_config()
return
def get(self, key, default=None):
with self.lock:
out = self.cmdline_options.get(key)
if out is None:
out = self.user_config.get(key)
if out is None:
out = self.system_config.get(key, default)
out = self.user_config.get(key, default)
return out
def requires_upgrade(self):
return self.get_config_version() < FINAL_CONFIG_VERSION
def upgrade(self):
with self.lock:
self.print_error('upgrading config')
self.convert_version_2()
self.set_key('config_version', FINAL_CONFIG_VERSION, save=True)
def convert_version_2(self):
if not self._is_upgrade_method_needed(1, 1):
return
self.rename_config_keys(self.user_config, {'auto_cycle': 'auto_connect'})
try:
# migrate server string FROM host:port:proto TO host:port
server_str = self.user_config.get('server')
host, port, protocol = str(server_str).rsplit(':', 2)
assert protocol in ('s', 't')
int(port) # Throw if cannot be converted to int
server_str = str('{}:{}'.format(host, port))
self._set_key_in_user_config('server', server_str)
except BaseException:
self._set_key_in_user_config('server', None)
self.set_key('config_version', 2)
def _is_upgrade_method_needed(self, min_version, max_version):
cur_version = self.get_config_version()
if cur_version > max_version:
return False
elif cur_version < min_version:
raise BaseException(
('config upgrade: unexpected version %d (should be %d-%d)'
% (cur_version, min_version, max_version)))
else:
return True
def get_config_version(self):
config_version = self.get('config_version', 1)
if config_version > FINAL_CONFIG_VERSION:
self.print_stderr('WARNING: config version ({}) is higher than ours ({})'
.format(config_version, FINAL_CONFIG_VERSION))
return config_version
def is_modifiable(self, key):
return not key in self.cmdline_options
return key not in self.cmdline_options
def save_user_config(self):
if not self.path:
@ -298,21 +351,6 @@ class SimpleConfig(PrintError):
return device
def read_system_config(path=SYSTEM_CONFIG_PATH):
"""Parse and return the system config settings in /etc/electrum.conf."""
result = {}
if os.path.exists(path):
import configparser
p = configparser.ConfigParser()
try:
p.read(path)
for k, v in p.items('client'):
result[k] = v
except (configparser.NoSectionError, configparser.MissingSectionHeaderError):
pass
return result
def read_user_config(path):
"""Parse and store the user config settings in electrum.conf into user_config[]."""
if not path:

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