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__init__.py
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__init__.py
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# Copyright 2012-2014 GRNET S.A. All rights reserved.
#
# Redistribution and use in source and binary forms, with or
# without modification, are permitted provided that the following
# conditions are met:
#
# 1. Redistributions of source code must retain the above
# copyright notice, this list of conditions and the following
# disclaimer.
#
# 2. Redistributions in binary form must reproduce the above
# copyright notice, this list of conditions and the following
# disclaimer in the documentation and/or other materials
# provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS
# OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR
# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
# USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
#
# The views and conclusions contained in the software and
# documentation are those of the authors and should not be
# interpreted as representing official policies, either expressed
# or implied, of GRNET S.A.command
import logging
from sys import argv, exit, stdout, stderr
from os.path import basename, exists
from inspect import getargspec
from kamaki.cli.argument import (
ArgumentParseManager, ConfigArgument, ValueArgument, FlagArgument,
RuntimeConfigArgument, VersionArgument, Argument)
from kamaki.cli.history import History
from kamaki.cli.utils import (
print_dict, magenta, red, yellow, suggest_missing, remove_colors, pref_enc)
from kamaki.cli.errors import CLIError, CLICmdSpecError
from kamaki.cli import logger
from kamaki.clients.astakos import CachedAstakosClient
from kamaki.clients import ClientError, KamakiSSLError
from kamaki.clients.utils import https, escape_ctrl_chars
_debug = False
kloger = None
# command auxiliary methods
_best_match = []
def _arg2syntax(arg):
return arg.replace(
'____', '[:').replace(
'___', ':').replace(
'__', ']').replace(
'_', ' ')
def _update_best_match(name_terms, prefix=[]):
global _best_match
if prefix:
pref_list = prefix if isinstance(prefix, list) else prefix.split('_')
else:
_best_match, pref_list = [], []
if pref_list:
num_of_matching_terms = 0
for i, term in enumerate(name_terms):
try:
if term == pref_list[i]:
num_of_matching_terms += 1
else:
break
except IndexError:
break
else:
num_of_matching_terms = len(name_terms)
if num_of_matching_terms and len(_best_match) <= num_of_matching_terms:
if len(_best_match) < num_of_matching_terms:
_best_match = name_terms[:num_of_matching_terms]
return True
return False
def command(cmd_tree, prefix='', descedants_depth=1):
"""Load a class as a command
e.g., spec_cmd0_cmd1 will be command spec cmd0
:param cmd_tree: is initialized in cmd_spec file and is the structure
where commands are loaded. Var name should be "namespaces"
:param prefix: if given, load only commands prefixed with prefix,
:param descedants_depth: is the depth of the tree descedants of the
prefix command. It is used ONLY if prefix and if prefix is not
a terminal command
:returns: the specified class object
"""
def wrap(cls):
global kloger
cls_name = cls.__name__
if not cmd_tree:
if _debug:
kloger.warning('command %s found but not loaded' % cls_name)
return cls
name_terms = cls_name.split('_')
if not _update_best_match(name_terms, prefix):
return None
global _best_match
max_len = len(_best_match) + descedants_depth
if len(name_terms) > max_len:
partial = '_'.join(name_terms[:max_len])
if not cmd_tree.has_command(partial): # add partial path
cmd_tree.add_command(partial)
if _debug:
kloger.warning('%s failed max_len test' % cls_name)
return None
try:
(
cls.description, sep, cls.long_description
) = cls.__doc__.partition('\n')
except AttributeError:
raise CLICmdSpecError(
'No commend in %s (acts as cmd description)' % cls.__name__)
# Build command syntax help
spec = getargspec(cls.main.im_func)
args = spec.args[1:]
n = len(args) - len(spec.defaults or ())
required = ' '.join(['<%s>' % _arg2syntax(x) for x in args[:n]])
optional = ' '.join(['[%s]' % _arg2syntax(x) for x in args[n:]])
cls.syntax = ' '.join([required, optional])
if spec.varargs:
cls.syntax += ' <%s ...>' % spec.varargs
cmd_tree.add_command(
cls_name, cls.description, cls, cls.long_description)
return cls
return wrap
cmd_spec_locations = [
'kamaki.cli.cmds',
'kamaki.cmds',
'kamaki.cli.commands',
'kamaki.commands',
'kamaki.cli',
'kamaki',
'']
# Generic init auxiliary functions
def _setup_logging(debug=False, verbose=False):
"""handle logging for clients package"""
sfmt, rfmt = '> %(message)s', '< %(message)s'
if debug:
print('Logging location: %s' % logger.get_log_filename())
logger.add_stream_logger('kamaki.clients.send', logging.DEBUG, sfmt)
logger.add_stream_logger('kamaki.clients.recv', logging.DEBUG, rfmt)
logger.add_stream_logger(__name__, logging.DEBUG)
elif verbose:
logger.add_stream_logger('kamaki.clients.send', logging.INFO, sfmt)
logger.add_stream_logger('kamaki.clients.recv', logging.INFO, rfmt)
logger.add_stream_logger(__name__, logging.INFO)
# else:
# logger.add_stream_logger(__name__, logging.WARNING)
global kloger
kloger = logger.get_logger(__name__)
def _check_config_version(cnf):
guess = cnf.guess_version()
if exists(cnf.path) and guess < 0.12:
print('Config file format version >= 0.12 is required (%s found)' % (
guess))
print('Configuration file: %s' % cnf.path)
print('Attempting to fix this:')
print('Calculating changes while preserving information')
lost_terms = cnf.rescue_old_file()
print('... DONE')
if lost_terms:
print 'The following information will NOT be preserved:'
print '\t', '\n\t'.join(lost_terms)
print('Kamaki is ready to convert the config file')
stdout.write('Create (overwrite) file %s ? [y/N] ' % escape_ctrl_chars(
cnf.path))
from sys import stdin
reply = stdin.readline()
if reply in ('Y\n', 'y\n'):
cnf.write()
print('... DONE')
else:
print('... ABORTING')
raise CLIError(
'Invalid format for config file %s' % cnf.path,
importance=3, details=[
'Please, update config file',
'For automatic conversion, rerun and say Y'])
def _init_session(arguments, is_non_api=False):
"""
:returns: cloud name
"""
_help = arguments['help'].value
global _debug
_debug = arguments['debug'].value
_verbose = arguments['verbose'].value
_cnf = arguments['config']
_setup_logging(_debug, _verbose)
if _help or is_non_api:
return None
# Patch https for SSL Authentication
ca_file = arguments['ca_file'].value or _cnf.get('global', 'ca_certs')
ignore_ssl = arguments['ignore_ssl'].value or (
_cnf.get('global', 'ignore_ssl').lower() == 'on')
if ca_file:
try:
https.patch_with_certs(ca_file)
except https.SSLUnicodeError as sslu:
raise CLIError(
'Failed to set CA certificates file %s' % ca_file,
importance=2, details=[
'SSL module cannot handle non-ascii file names',
'Check the file path and consider moving and renaming',
'To set the new CA certificates path',
' kamaki config set ca_certs CA_FILE',
sslu, ])
else:
warn = red('CA certifications path not set (insecure) ')
kloger.warning(warn)
https.patch_ignore_ssl(ignore_ssl)
_check_config_version(_cnf.value)
_colors = _cnf.value.get('global', 'colors')
if not (stdout.isatty() and _colors == 'on'):
remove_colors()
cloud = arguments['cloud'].value or _cnf.value.get(
'global', 'default_cloud')
if not cloud:
num_of_clouds = len(_cnf.value.keys('cloud'))
if num_of_clouds == 1:
cloud = _cnf.value.keys('cloud')[0]
elif num_of_clouds > 1:
raise CLIError(
'Found %s clouds but none of them is set as default' % (
num_of_clouds),
importance=2, details=[
'Please, choose one of the following cloud names:',
', '.join(_cnf.value.keys('cloud')),
'To see all cloud settings:',
' kamaki config get cloud.<cloud name>',
'To set a default cloud:',
' kamaki config set default_cloud <cloud name>',
'To pick a cloud for the current session, use --cloud:',
' kamaki --cloud=<cloud name> ...'])
if cloud not in _cnf.value.keys('cloud'):
raise CLIError(
'No cloud%s is configured' % ((' "%s"' % cloud) if cloud else ''),
importance=3, details=[
'To configure a new cloud "%s", find and set the' % (
cloud or '<cloud name>'),
'single authentication URL and token:',
' kamaki config set cloud.%s.url <URL>' % (
cloud or '<cloud name>'),
' kamaki config set cloud.%s.token <t0k3n>' % (
cloud or '<cloud name>')])
auth_args = dict()
for term in ('url', 'token'):
try:
auth_args[term] = _cnf.get_cloud(cloud, term)
except KeyError or IndexError:
auth_args[term] = ''
if not auth_args[term]:
raise CLIError(
'No authentication %s provided for cloud "%s"' % (
term.upper(), cloud),
importance=3, details=[
'Set a %s for cloud %s:' % (term.upper(), cloud),
' kamaki config set cloud.%s.%s <%s>' % (
cloud, term, term.upper())])
return cloud
def init_cached_authenticator(config_argument, cloud, logger):
try:
_cnf = config_argument.value
url = _cnf.get_cloud(cloud, 'url')
tokens = _cnf.get_cloud(cloud, 'token').split()
astakos, failed, help_message = None, [], []
for token in tokens:
try:
if astakos:
astakos.authenticate(token)
else:
tmp_base = CachedAstakosClient(url, token)
from kamaki.cli.cmds import CommandInit
fake_cmd = CommandInit(dict(config=config_argument))
fake_cmd.client = astakos
fake_cmd._set_log_params()
tmp_base.authenticate(token)
astakos = tmp_base
except ClientError as ce:
if ce.status in (401, ):
logger.warning(
'Cloud %s failed to authenticate token %s' % (
cloud, token))
failed.append(token)
else:
raise
if failed:
if set(tokens) == set(failed):
tlen = len(tokens)
logger.warning(
'%s token%s in cloud.%s.token failed to authenticate' % (
('All %s' % tlen) if tlen > 1 else 'The only',
's' if tlen > 1 else '', cloud))
help_message += [
'To replace with a new and valid token:',
' kamaki config set cloud.%s.token NEW_TOKEN' % (cloud)]
else:
tlen = len(tokens)
for token in failed:
tokens.remove(token)
logger.warning(
'%s of %s tokens removed from cloud.%s.token list' % (
len(failed), tlen, cloud))
_cnf.set_cloud(cloud, 'token', ' '.join(tokens))
_cnf.write()
if tokens:
return astakos, help_message
logger.warning('cloud.%s.token is now empty' % cloud)
help_message = [
'To set a new token:',
' kamaki config set cloud.%s.token NEW_TOKEN']
except AssertionError as ae:
logger.warning('Failed to load authenticator [%s]' % ae)
return None, help_message
def _load_spec_module(spec, arguments, module):
global kloger
if not spec:
return None
pkg = None
for location in cmd_spec_locations:
location += spec if location == '' else '.%s' % spec
try:
kloger.debug('Import %s from %s' % ([module], location))
pkg = __import__(location, fromlist=[module])
kloger.debug('\t...OK')
return pkg
except ImportError as ie:
kloger.debug('\t...Failed')
continue
if not pkg:
msg = 'Loading command group %s failed: %s' % (spec, ie)
msg += '\nHINT: use a text editor to remove all global.*_cli'
msg += '\n\tsettings from the configuration file'
kloger.debug(msg)
return pkg
def _groups_help(arguments):
global _debug
global kloger
descriptions = {}
acceptable_groups = arguments['config'].groups
for cmd_group, spec in arguments['config'].cli_specs:
pkg = _load_spec_module(spec, arguments, 'namespaces')
if pkg:
namespaces = getattr(pkg, 'namespaces')
try:
for cmd_tree in namespaces:
if cmd_tree.name in acceptable_groups:
descriptions[cmd_tree.name] = cmd_tree.description
except TypeError:
if _debug:
kloger.warning(
'No cmd description (help) for module %s' % cmd_group)
elif _debug:
kloger.warning('Loading of %s cmd spec failed' % cmd_group)
print('\nOptions:\n - - - -')
print_dict(descriptions)
def _load_all_commands(cmd_tree, arguments):
_cnf = arguments['config']
for cmd_group, spec in _cnf.cli_specs:
try:
spec_module = _load_spec_module(spec, arguments, 'namespaces')
namespaces = getattr(spec_module, 'namespaces')
except AttributeError:
if _debug:
global kloger
kloger.warning('No valid description for %s' % cmd_group)
continue
for spec_tree in namespaces:
if spec_tree.name == cmd_group:
cmd_tree.add_tree(spec_tree)
break
# Methods to be used by CLI implementations
def print_subcommands_help(cmd):
printout = {}
for subcmd in cmd.subcommands.values():
spec, sep, print_path = subcmd.path.partition('_')
printout[print_path.replace('_', ' ')] = subcmd.help
if printout:
print('\nOptions:\n - - - -')
print_dict(printout)
def update_parser_help(parser, cmd):
global _best_match
parser.syntax = parser.syntax.split('<')[0]
parser.syntax += ' '.join(_best_match)
description = ''
if cmd.is_command:
cls = cmd.cmd_class
parser.syntax += ' ' + cls.syntax
parser.update_arguments(cls().arguments)
description = getattr(cls, 'long_description', '').strip()
else:
parser.syntax += ' <...>'
parser.parser.description = (
cmd.help + ('\n' if description else '')) if cmd.help else description
def print_error_message(cli_err, out=stderr):
errmsg = escape_ctrl_chars(('%s' % cli_err).strip('\n')).encode(
pref_enc, 'replace')
if cli_err.importance == 1:
errmsg = magenta(errmsg)
elif cli_err.importance == 2:
errmsg = yellow(errmsg)
elif cli_err.importance > 2:
errmsg = red(errmsg)
out.write(errmsg)
out.write('\n')
for errmsg in cli_err.details:
out.write('| %s\n' % escape_ctrl_chars(u'%s' % errmsg).encode(
pref_enc, 'replace'))
out.flush()
def exec_cmd(instance, cmd_args, help_method):
try:
return instance.main(*cmd_args)
except TypeError as err:
if err.args and err.args[0].startswith('main()'):
print(magenta('Syntax error'))
if _debug:
raise err
help_method()
else:
raise
return 1
def get_command_group(unparsed, arguments):
groups = arguments['config'].groups
for term in unparsed:
if term.startswith('-'):
continue
if term in groups:
unparsed.remove(term)
return term
return None
return None
def set_command_params(parameters):
"""Add a parameters list to a command
:param paramters: (list of str) a list of parameters
"""
global command
def_params = list(command.func_defaults)
def_params[0] = parameters
command.func_defaults = tuple(def_params)
# CLI Choice:
def is_non_api(parser):
non_apis = ('history', 'config')
for term in parser.unparsed:
if not term.startswith('-'):
if term in non_apis:
return True
return False
return False
def main(func):
def wrap():
try:
exe = basename(argv[0])
internal_argv = []
for i, a in enumerate(argv):
try:
internal_argv.append(a.decode(pref_enc))
except UnicodeDecodeError as ude:
raise CLIError(
'Invalid encoding in command', importance=3, details=[
'The invalid term is #%s (with "%s" being 0)' % (
i, exe),
'Encoding is invalid with current locale settings '
'(%s)' % pref_enc,
'( %s )' % ude])
for i, a in enumerate(internal_argv):
argv[i] = a
logger.add_stream_logger(
__name__, logging.WARNING,
fmt='%(levelname)s (%(name)s): %(message)s')
_config_arg = ConfigArgument('Path to config file')
parser = ArgumentParseManager(exe, arguments=dict(
config=_config_arg,
cloud=ValueArgument(
'Chose a cloud to connect to', ('--cloud')),
help=Argument(0, 'Show help message', ('-h', '--help')),
debug=FlagArgument('Include debug output', ('-d', '--debug')),
verbose=FlagArgument(
'More info at response', ('-v', '--verbose')),
version=VersionArgument(
'Print current version', ('-V', '--version')),
options=RuntimeConfigArgument(
_config_arg,
'Override a config value', ('-o', '--options')),
ignore_ssl=FlagArgument(
'Allow connections to SSL sites without certs',
('-k', '--ignore-ssl', '--insecure')),
ca_file=ValueArgument(
'CA certificates for SSL authentication', '--ca-certs'),)
)
if parser.arguments['version'].value:
exit(0)
_cnf = parser.arguments['config']
log_file = _cnf.get('global', 'log_file')
if log_file:
logger.set_log_filename(log_file)
filelog = logger.add_file_logger(__name__.split('.')[0])
filelog.info('%s\n- - -' % ' '.join(argv))
_colors = _cnf.value.get('global', 'colors')
exclude = ['ansicolors'] if not _colors == 'on' else []
suggest_missing(exclude=exclude)
func(exe, parser)
except CLIError as err:
print_error_message(err)
if _debug:
raise err
exit(1)
except KamakiSSLError as err:
ca_arg = parser.arguments.get('ca_file')
ca = ca_arg.value if ca_arg and ca_arg.value else _cnf.get(
'global', 'ca_certs')
stderr.write(red('SSL Authentication failed\n'))
if ca:
stderr.write('Path used for CA certifications file: %s\n' % (
escape_ctrl_chars(ca)))
stderr.write('Please make sure the path is correct\n')
if not (ca_arg and ca_arg.value):
stderr.write('| To set the correct path:\n')
stderr.write('| kamaki config set ca_certs CA_FILE\n')
else:
stderr.write('| To use a CA certifications file:\n')
stderr.write('| kamaki config set ca_certs CA_FILE\n')
stderr.write('| OR run with --ca-certs=FILE_LOCATION\n')
stderr.write('| To ignore SSL errors and move on (%s):\n' % (
red('insecure')))
stderr.write('| kamaki config set ignore_ssl on\n')
stderr.write('| OR run with --ignore-ssl\n')
stderr.flush()
if _debug:
raise
stderr.write('| %s: %s\n' % (
type(err), escape_ctrl_chars('%s' % err)))
stderr.flush()
exit(1)
except KeyboardInterrupt:
print('Canceled by user')
exit(1)
except Exception as er:
print('Unknown Error: %s' % er)
if _debug:
raise
exit(1)
return wrap
@main
def run_shell(exe, parser):
parser.arguments['help'].value = False
cloud = _init_session(parser.arguments)
global kloger
_cnf = parser.arguments['config']
astakos, help_message = init_cached_authenticator(_cnf, cloud, kloger)
try:
username, userid = (astakos.user_term('name'), astakos.user_term('id'))
except Exception:
username, userid = '', ''
from kamaki.cli.shell import init_shell
shell = init_shell(exe, parser, username, userid)
_load_all_commands(shell.cmd_tree, parser.arguments)
shell.run(astakos, cloud, parser)
@main
def run_one_cmd(exe, parser):
cloud = _init_session(parser.arguments, is_non_api(parser))
if parser.unparsed:
global _history
cnf = parser.arguments['config']
try:
token = cnf.get_cloud(cloud, 'token').split()[0]
except Exception:
token = None
_history = History(cnf.get('global', 'history_file'), token=token)
_history.limit = cnf.get('global', 'history_limit')
_history.add(' '.join([exe] + argv[1:]))
from kamaki.cli import one_cmd
one_cmd.run(cloud, parser)
else:
parser.print_help()
_groups_help(parser.arguments)
print('kamaki-shell: An interactive command line shell')