+# encoding: utf-8
from __future__ import with_statement
+import os
import re
from dbuscron.bus import DbusBus
-try:
- from itertools import product
-except ImportError:
- def product(*args):
- if args:
- head, tail = args[0], args[1:]
- for h in head:
- for t in product(*tail):
- yield (h,) + t
-
+def unescape_():
+ h = '[0-9A-Fa-f]'
+ r = re.compile(r'\\x('+h+r'{2})|\\u('+h+'{4})')
+
+ def unescape(value):
+ if not (value and
+ (r'\x' in value or r'\u' in value)):
+ return value
+
+ return r.sub(
+ lambda m: chr(int(m.group(1), 16))
+ if m.group(1) is not None else
+ unichr(int(m.group(2), 16))
+ .encode('utf-8'),\
+ value)
+ return unescape
+unescape = unescape_()
+
+def product(*args):
+ if args:
+ head, tail = args[0], args[1:]
+ for h in head:
+ for t in product(*tail):
+ yield (h,) + t
+
+ else:
+ yield ()
+
+class CrontabParserError(SyntaxError):
+ def __init__(self, message, lineno, expected=None):
+ if expected:
+ if isinstance(expected, (tuple, list)):
+ exp = ' (expected %s or %s)' % (', '.join(expected[:-1]), expected[-1])
else:
- yield ()
+ exp = ''
+
+ msg = '%s%s at line %d' % (message, exp, lineno)
+
+ SyntaxError.__init__(self, msg)
+
+def CrontabParser(*filenames):
+ for filename in filenames:
+ if not os.path.exists(filename):
+ continue
+
+ if os.path.isfile(filename):
+ parser_class = FileParser
+
+ elif os.path.isdir(filename):
+ parser_class = DirectoryParser
-class CrontabParser(object):
+ else:
+ raise SystemError("I can parse only directories or simple files.")
+
+ return parser_class(filename)
+
+ raise SystemError("Can't find any config file or directory.")
+
+class FileParser(object):
__fields_sep = re.compile(r'\s+')
__envvar_sep = re.compile(r'\s*=\s*')
+ __fields_chk = {
+ 'bus_' : None,
+ 'type_' : ('signal', 'method_call', 'method_return', 'error'),
+ 'sender_' : None,
+ 'interface_' : re.compile(r'^[a-zA-Z][a-zA-Z0-9_.]+$'),
+ 'path_' : re.compile(r'^/[a-zA-Z0-9_/]+$'),
+ 'member_' : re.compile(r'^[a-zA-Z][a-zA-Z0-9_]+$'),
+ 'destination_' : None,
+ 'args_' : None,
+ }
__fields = [
'bus_',
'type_',
'member_',
'destination_',
'args_',
- #'command'
]
def __init__(self, fname):
- self.__bus = DbusBus()
- self.__filename = fname
- self.__environ = dict()
+ self._bus = DbusBus()
+ self._filename = fname
+ self._environ = dict()
@property
def environ(self):
- return self.__environ
+ return self._environ
- def __iter__(self):
+ @property
+ def filename(self):
+ return self._filename
+
+ def _iterate_file(self, filename):
# bus type sender interface path member destination args command
- with open(self.__filename) as f:
+ lineno = 0
+ with open(filename) as f:
for line in f:
+ lineno += 1
line = line.strip()
if not line or line.startswith('#'):
parts = self.__fields_sep.split(line, 8)
if len(parts) < 9:
- parts = self.__envvar_sep(line, 1)
+ parts = self.__envvar_sep.split(line, 1)
if len(parts) == 2:
self.__environ[parts[0]] = parts[1]
- continue
+ continue
- rule = [('s','S'), ('signal','method_call','method_return','error'), (None,), (None,), (None,), (None,), (None,), (None,)]
+ raise CrontabParserError('Unexpected number of records', lineno)
+
+ rule = [('s', 'S'), self.__fields_chk['type_'], (None,), (None,), (None,), (None,), (None,), (None,)]
for p in range(0, 8):
if parts[p] != '*':
rule[p] = parts[p].split(',')
command = parts[8]
-
+
for r in product(*rule):
r = list(r)
if r[0] == 'S':
- r[0] = self.__bus.system
+ r[0] = self._bus.system
elif r[0] == 's':
- r[0] = self.__bus.session
+ r[0] = self._bus.session
else:
- continue
-
+ raise CrontabParserError('Unexpected bus value', lineno, expected=('S', 's', '*'))
+
if r[7]:
- r[7] = r[7].split(';')
+ r[7] = map(unescape, r[7].split(';'))
ruled = dict()
for i, f in enumerate(self.__fields):
+ if r[i] is not None and self.__fields_chk[f]:
+ if isinstance(self.__fields_chk[f], tuple):
+ if r[i] not in self.__fields_chk[f]:
+ raise CrontabParserError('Unexpected %s value' % (f.strip('_')), lineno,
+ expected=self.__fields_chk[f])
+ else:
+ if not self.__fields_chk[f].match(r[i]):
+ raise CrontabParserError('Incorrect %s value' % (f.strip('_')), lineno)
ruled[f] = r[i]
+
yield ruled, command
+ def __iter__(self):
+ return self._iterate_file(self._filename)
+
+class DirectoryParser(FileParser):
+
+ def __init__(self, dirname, recursive=False):
+ self.__recursive = recursive
+ super(DirectoryParser, self).__init__(dirname)
+
+ def _dirwalker_plain(self):
+ for i in os.listdir(self._filename):
+ f = os.path.join(self._filename, i)
+ if os.path.isfile(f):
+ yield f
+
+ def _dirwalker_recursive(self):
+ for r, d, f in os.walk(self._filename):
+ for i in f:
+ yield os.path.join(r, i)
+
+ def __iter__(self):
+ if self.__recursive:
+ dirwalker = self._dirwalker_recursive
+ else:
+ dirwalker = self._dirwalker_plain
+
+ for fname in dirwalker():
+ for item in self._iterate_file(fname):
+ yield item
+
+def OptionsParser(args=None, help=u'', **opts):
+
+ from optparse import OptionParser
+ import dbuscron
+ parser = OptionParser(usage=help, version="%prog " + dbuscron.__version__)
+ for opt, desc in opts.iteritems():
+ names = desc.pop('names')
+ desc['dest'] = opt
+ parser.add_option(*names, **desc)
+
+ return parser.parse_args(args)[0]
+
projects / dbuscron / blobdiff