"""some utilities for cubicweb tools
:organization: Logilab
:copyright: 2001-2009 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
:contact: http://www.logilab.fr/ -- mailto:contact@logilab.fr
"""
__docformat__ = "restructuredtext en"
import os, sys
from os import listdir, makedirs, symlink, environ, chmod, walk, remove
from os.path import exists, join, abspath, normpath
from logilab.common.clcommands import Command as BaseCommand, \
main_run as base_main_run
from logilab.common.compat import any
from cubicweb import warning
from cubicweb import ConfigurationError, ExecutionError
def iter_dir(directory, condition_file=None, ignore=()):
"""iterate on a directory"""
for sub in listdir(directory):
if sub in ('CVS', '.svn', '.hg'):
continue
if condition_file is not None and \
not exists(join(directory, sub, condition_file)):
continue
if sub in ignore:
continue
yield sub
def create_dir(directory):
"""create a directory if it doesn't exist yet"""
try:
makedirs(directory)
print 'created directory', directory
except OSError, ex:
import errno
if ex.errno != errno.EEXIST:
raise
print 'directory %s already exists' % directory
def create_symlink(source, target):
"""create a symbolic link"""
if exists(target):
remove(target)
symlink(source, target)
print '[symlink] %s <-- %s' % (target, source)
def create_copy(source, target):
import shutil
print '[copy] %s <-- %s' % (target, source)
shutil.copy2(source, target)
def rm(whatever):
import shutil
shutil.rmtree(whatever)
print 'removed %s' % whatever
def show_diffs(appl_file, ref_file, askconfirm=True):
"""interactivly replace the old file with the new file according to
user decision
"""
import shutil
p_output = os.popen('diff -u %s %s' % (appl_file, ref_file), 'r')
diffs = p_output.read()
if diffs:
if askconfirm:
print
print diffs
action = raw_input('replace (N/y/q) ? ').lower()
else:
action = 'y'
if action == 'y':
try:
shutil.copyfile(ref_file, appl_file)
except IOError:
os.system('chmod a+w %s' % appl_file)
shutil.copyfile(ref_file, appl_file)
print 'replaced'
elif action == 'q':
sys.exit(0)
else:
copy_file = appl_file + '.default'
copy = file(copy_file, 'w')
copy.write(open(ref_file).read())
copy.close()
print 'keep current version, the new file has been written to', copy_file
else:
print 'no diff between %s and %s' % (appl_file, ref_file)
def copy_skeleton(skeldir, targetdir, context,
exclude=('*.py[co]', '*.orig', '*~', '*_flymake.py'),
askconfirm=False):
import shutil
from fnmatch import fnmatch
skeldir = normpath(skeldir)
targetdir = normpath(targetdir)
for dirpath, dirnames, filenames in walk(skeldir):
tdirpath = dirpath.replace(skeldir, targetdir)
create_dir(tdirpath)
for fname in filenames:
if any(fnmatch(fname, pat) for pat in exclude):
continue
fpath = join(dirpath, fname)
if 'CUBENAME' in fname:
tfpath = join(tdirpath, fname.replace('CUBENAME', context['cubename']))
elif 'DISTNAME' in fname:
tfpath = join(tdirpath, fname.replace('DISTNAME', context['distname']))
else:
tfpath = join(tdirpath, fname)
if fname.endswith('.tmpl'):
tfpath = tfpath[:-5]
if not askconfirm or not exists(tfpath) or \
confirm('%s exists, overwrite?' % tfpath):
fname = fill_templated_file(fpath, tfpath, context)
print '[generate] %s <-- %s' % (tfpath, fpath)
elif exists(tfpath):
show_diffs(tfpath, fpath, askconfirm)
else:
shutil.copyfile(fpath, tfpath)
def fill_templated_file(fpath, tfpath, context):
fobj = file(tfpath, 'w')
templated = file(fpath).read()
fobj.write(templated % context)
fobj.close()
def restrict_perms_to_user(filepath, log=None):
"""set -rw------- permission on the given file"""
if log:
log('set %s permissions to 0600', filepath)
else:
print 'set %s permissions to 0600' % filepath
chmod(filepath, 0600)
def confirm(question, default_is_yes=True):
"""ask for confirmation and return true on positive answer"""
if default_is_yes:
input_str = '%s [Y/n]: '
else:
input_str = '%s [y/N]: '
answer = raw_input(input_str % (question)).strip().lower()
if default_is_yes:
if answer in ('n', 'no'):
return False
return True
if answer in ('y', 'yes'):
return True
return False
def read_config(config_file):
"""read the application configuration from a file and return it as a
dictionnary
:type config_file: str
:param config_file: path to the configuration file
:rtype: dict
:return: a dictionary with specified values associated to option names
"""
from logilab.common.fileutils import lines
config = current = {}
try:
for line in lines(config_file, comments='#'):
try:
option, value = line.split('=', 1)
except ValueError:
option = line.strip().lower()
if option[0] == '[':
# start a section
section = option[1:-1]
assert not config.has_key(section), \
'Section %s is defined more than once' % section
config[section] = current = {}
continue
print >> sys.stderr, 'ignoring malformed line\n%r' % line
continue
option = option.strip().replace(' ', '_')
value = value.strip()
current[option] = value or None
except IOError, ex:
warning('missing or non readable configuration file %s (%s)',
config_file, ex)
return config
def env_path(env_var, default, name):
"""get a path specified in a variable or using the default value and return
it.
:type env_var: str
:param env_var: name of an environment variable
:type default: str
:param default: default value if the environment variable is not defined
:type name: str
:param name: the informal name of the path, used for error message
:rtype: str
:return: the value of the environment variable or the default value
:raise `ConfigurationError`: if the returned path does not exist
"""
path = environ.get(env_var, default)
if not exists(path):
raise ConfigurationError('%s path %s doesn\'t exist' % (name, path))
return abspath(path)
_HDLRS = {}
class metacmdhandler(type):
def __new__(mcs, name, bases, classdict):
cls = super(metacmdhandler, mcs).__new__(mcs, name, bases, classdict)
if getattr(cls, 'cfgname', None) and getattr(cls, 'cmdname', None):
_HDLRS.setdefault(cls.cmdname, []).append(cls)
return cls
class CommandHandler(object):
"""configuration specific helper for cubicweb-ctl commands"""
__metaclass__ = metacmdhandler
def __init__(self, config):
self.config = config
class Command(BaseCommand):
"""base class for cubicweb-ctl commands"""
def config_helper(self, config, required=True, cmdname=None):
if cmdname is None:
cmdname = self.name
for helpercls in _HDLRS.get(cmdname, ()):
if helpercls.cfgname == config.name:
return helpercls(config)
if config.name == 'all-in-one':
for helpercls in _HDLRS.get(cmdname, ()):
if helpercls.cfgname == 'repository':
return helpercls(config)
if required:
msg = 'No helper for command %s using %s configuration' % (
cmdname, config.name)
raise ConfigurationError(msg)
def fail(self, reason):
print "command failed:", reason
sys.exit(1)
def main_run(args, doc):
"""command line tool"""
try:
base_main_run(args, doc)
except ConfigurationError, err:
print 'ERROR: ', err
sys.exit(1)
except ExecutionError, err:
print err
sys.exit(2)
CONNECT_OPTIONS = (
("user",
{'short': 'u', 'type' : 'string', 'metavar': '<user>',
'help': 'connect as <user> instead of being prompted to give it.',
}
),
("password",
{'short': 'p', 'type' : 'password', 'metavar': '<password>',
'help': 'automatically give <password> for authentication instead of \
being prompted to give it.',
}),
("host",
{'short': 'H', 'type' : 'string', 'metavar': '<hostname>',
'default': None,
'help': 'specify the name server\'s host name. Will be detected by \
broadcast if not provided.',
}),
)
def config_connect(appid, optconfig):
from cubicweb.dbapi import connect
from getpass import getpass
user = optconfig.user
if not user:
user = raw_input('login: ')
password = optconfig.password
if not password:
password = getpass('password: ')
return connect(user=user, password=password, host=optconfig.host, database=appid)