mirror of
https://github.com/samsonjs/vdirsyncer.git
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96 lines
2.5 KiB
Python
96 lines
2.5 KiB
Python
# -*- coding: utf-8 -*-
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import click
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from . import AppContext
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from .. import exceptions, log
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from ..utils import expand_path, synchronized
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SUFFIX = '.fetch'
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logger = log.get(__name__)
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try:
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import keyring
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except ImportError:
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keyring = None
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def expand_fetch_params(config):
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config = dict(config)
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for key in list(config):
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if not key.endswith(SUFFIX):
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continue
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newkey = key[:-len(SUFFIX)]
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if newkey in config:
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raise ValueError('Can\'t set {} and {}.'.format(key, newkey))
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config[newkey] = _fetch_value(config[key], key)
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del config[key]
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return config
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@synchronized()
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def _fetch_value(opts, key):
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if not isinstance(opts, list):
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raise ValueError('Invalid value for {}: Expected a list, found {!r}.'
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.format(key, opts))
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if not opts:
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raise ValueError('Expected list of length > 0.')
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try:
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ctx = click.get_current_context().find_object(AppContext)
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if ctx is None:
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raise RuntimeError()
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password_cache = ctx.fetched_params
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except RuntimeError:
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password_cache = {}
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cache_key = tuple(opts)
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if cache_key in password_cache:
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rv = password_cache[cache_key]
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logger.debug('Found cached value for {!r}.'.format(opts))
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if isinstance(rv, BaseException):
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raise rv
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return rv
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strategy = opts[0]
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logger.debug('Fetching value for {} with {} strategy.'
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.format(key, strategy))
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try:
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rv = STRATEGIES[strategy](*opts[1:])
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except (click.Abort, KeyboardInterrupt) as e:
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password_cache[cache_key] = e
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raise
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else:
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password_cache[cache_key] = rv
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return rv
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def _strategy_keyring(username, host):
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if not keyring:
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raise RuntimeError('Keyring package not available.')
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return keyring.get_password(username, host)
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def _strategy_command(*command):
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import subprocess
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command = (expand_path(command[0]),) + command[1:]
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try:
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stdout = subprocess.check_output(command, universal_newlines=True)
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return stdout.strip('\n')
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except OSError as e:
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raise exceptions.UserError('Failed to execute command: {}\n{}'
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.format(' '.join(command), str(e)))
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def _strategy_prompt(text):
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return click.prompt(text, hide_input=True)
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STRATEGIES = {
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'keyring': _strategy_keyring,
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'command': _strategy_command,
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'prompt': _strategy_prompt,
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}
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