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import ast
import threading
import os
from util import user_dir, print_error, print_msg
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=None, read_system_config_function=None,
read_user_config_function=None, read_user_dir_function=None):
# This is the holder of actual options for the current user.
self.read_only_options = {}
# This lock needs to be acquired for updating and reading the config in
# a thread-safe way.
self.lock = threading.RLock()
# The path for the config directory. This is set later by init_path()
self.path = None
if options is None:
options = {} # Having a mutable as a default value is a bad idea.
# 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
# Save the command-line keys to make sure we don't override them.
self.command_line_keys = options.keys()
# Save the system config keys to make sure we don't override them.
self.system_config_keys = []
if options.get('portable') is not True:
# system conf
system_config = read_system_config_function()
self.system_config_keys = system_config.keys()
self.read_only_options.update(system_config)
# update the current options with the command line options last (to
# override both others).
self.read_only_options.update(options)
# init path
self.init_path()
# user config.
self.user_config = read_user_config_function(self.path)
set_config(self) # Make a singleton instance of 'self'
def init_path(self):
# Read electrum path in the command line configuration
self.path = self.read_only_options.get('electrum_path')
# If not set, use the user's default data directory.
if self.path is None:
self.path = self.user_dir()
# Make directory if it does not yet exist.
if not os.path.exists(self.path):
os.mkdir(self.path)
print_error( "electrum directory", self.path)
def set_key(self, key, value, save = True):
if not self.is_modifiable(key):
print "Warning: not changing key '%s' because it is not modifiable" \
" (passed as command line option or defined in /etc/electrum.conf)"%key
return
with self.lock:
self.user_config[key] = value
if save:
self.save_user_config()
return
def get(self, key, default=None):
out = None
with self.lock:
out = self.read_only_options.get(key)
if not out:
out = self.user_config.get(key, default)
return out
def is_modifiable(self, key):
if key in self.command_line_keys:
return False
if key in self.system_config_keys:
return False
return True
def save_user_config(self):
if not self.path: return
path = os.path.join(self.path, "config")
s = repr(self.user_config)
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 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 {} # Return a dict, since we will call update() on it.
config_path = os.path.join(path, "config")
result = {}
if os.path.exists(config_path):
try:
with open(config_path, "r") as f:
data = f.read()
result = ast.literal_eval( data ) #parse raw data from reading wallet file
except Exception:
print_msg("Error: Cannot read config file.")
result = {}
if not type(result) is dict:
return {}
return result