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import ast
import json
import threading
import os
from copy import deepcopy
from util import user_dir, print_error, print_msg, print_stderr
SYSTEM_CONFIG_PATH = "/etc/electrum.conf"
config = None
def get_config():
global config
return config
def set_config(c):
global config
config = c
class SimpleConfig(object):
"""
The SimpleConfig class is responsible for handling operations involving
configuration files.
There are 3 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.)
"""
def __init__(self, options={}, read_system_config_function=None,
read_user_config_function=None, read_user_dir_function=None):
# This lock needs to be acquired for updating and reading the config in
# a thread-safe way.
self.lock = threading.RLock()
# 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:
self.user_dir = user_dir
else:
self.user_dir = read_user_dir_function
# 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()
# 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'})
# Make a singleton instance of 'self'
set_config(self)
def electrum_path(self):
# Read electrum_path from command line / system configuration
# Otherwise use the user's default data directory.
path = self.get('electrum_path')
if path is None:
path = self.user_dir()
# Make directory if it does not yet exist.
if not os.path.exists(path):
os.mkdir(path)
print_error("electrum directory", path)
return path
def fixup_config_keys(self, config, keypairs):
updated = False
for old_key, new_key in keypairs.iteritems():
if old_key in config:
if not new_key in config:
config[new_key] = config[old_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):
if not self.is_modifiable(key):
print_stderr("Warning: not changing config key '%s' set on the command line" % key)
return
with self.lock:
self.user_config[key] = value
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)
return out
def is_modifiable(self, key):
return not key in self.cmdline_options
def save_user_config(self):
if not self.path:
return
path = os.path.join(self.path, "config")
s = json.dumps(self.user_config, indent=4, sort_keys=True)
f = open(path, "w")
f.write(s)
f.close()
if self.get('gui') != 'android':
import stat
os.chmod(path, stat.S_IREAD | stat.S_IWRITE)
def get_wallet_path(self):
"""Set the path of the wallet."""
# command line -w option
path = self.get('wallet_path')
if path:
return path
# path in config file
path = self.get('default_wallet_path')
if path and os.path.exists(path):
return path
# default path
dirpath = os.path.join(self.path, "wallets")
if not os.path.exists(dirpath):
os.mkdir(dirpath)
new_path = os.path.join(self.path, "wallets", "default_wallet")
# default path in pre 1.9 versions
old_path = os.path.join(self.path, "electrum.dat")
if os.path.exists(old_path) and not os.path.exists(new_path):
os.rename(old_path, new_path)
return new_path
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):
try:
import ConfigParser
except ImportError:
print "cannot parse electrum.conf. please install ConfigParser"
return
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:
return {}
config_path = os.path.join(path, "config")
try:
with open(config_path, "r") as f:
data = f.read()
except IOError:
print_msg("Error: Cannot read config file.")
return {}
try:
result = json.loads(data)
except:
try:
result = ast.literal_eval(data)
except:
print_msg("Error: Cannot read config file.")
return {}
if not type(result) is dict:
return {}
return result