mirror of
https://github.com/morpheus65535/bazarr
synced 2024-12-26 09:37:25 +00:00
593 lines
23 KiB
Python
593 lines
23 KiB
Python
# config.py
|
|
# Copyright (C) 2008, 2009 Michael Trier (mtrier@gmail.com) and contributors
|
|
#
|
|
# This module is part of GitPython and is released under
|
|
# the BSD License: http://www.opensource.org/licenses/bsd-license.php
|
|
"""Module containing module parser implementation able to properly read and write
|
|
configuration files"""
|
|
|
|
import abc
|
|
from functools import wraps
|
|
import inspect
|
|
import logging
|
|
import os
|
|
import re
|
|
from collections import OrderedDict
|
|
|
|
from git.compat import (
|
|
string_types,
|
|
FileType,
|
|
defenc,
|
|
force_text,
|
|
with_metaclass,
|
|
PY3
|
|
)
|
|
from git.util import LockFile
|
|
|
|
import os.path as osp
|
|
|
|
|
|
try:
|
|
import ConfigParser as cp
|
|
except ImportError:
|
|
# PY3
|
|
import configparser as cp
|
|
|
|
|
|
__all__ = ('GitConfigParser', 'SectionConstraint')
|
|
|
|
|
|
log = logging.getLogger('git.config')
|
|
log.addHandler(logging.NullHandler())
|
|
|
|
|
|
class MetaParserBuilder(abc.ABCMeta):
|
|
|
|
"""Utlity class wrapping base-class methods into decorators that assure read-only properties"""
|
|
def __new__(cls, name, bases, clsdict):
|
|
"""
|
|
Equip all base-class methods with a needs_values decorator, and all non-const methods
|
|
with a set_dirty_and_flush_changes decorator in addition to that."""
|
|
kmm = '_mutating_methods_'
|
|
if kmm in clsdict:
|
|
mutating_methods = clsdict[kmm]
|
|
for base in bases:
|
|
methods = (t for t in inspect.getmembers(base, inspect.isroutine) if not t[0].startswith("_"))
|
|
for name, method in methods:
|
|
if name in clsdict:
|
|
continue
|
|
method_with_values = needs_values(method)
|
|
if name in mutating_methods:
|
|
method_with_values = set_dirty_and_flush_changes(method_with_values)
|
|
# END mutating methods handling
|
|
|
|
clsdict[name] = method_with_values
|
|
# END for each name/method pair
|
|
# END for each base
|
|
# END if mutating methods configuration is set
|
|
|
|
new_type = super(MetaParserBuilder, cls).__new__(cls, name, bases, clsdict)
|
|
return new_type
|
|
|
|
|
|
def needs_values(func):
|
|
"""Returns method assuring we read values (on demand) before we try to access them"""
|
|
|
|
@wraps(func)
|
|
def assure_data_present(self, *args, **kwargs):
|
|
self.read()
|
|
return func(self, *args, **kwargs)
|
|
# END wrapper method
|
|
return assure_data_present
|
|
|
|
|
|
def set_dirty_and_flush_changes(non_const_func):
|
|
"""Return method that checks whether given non constant function may be called.
|
|
If so, the instance will be set dirty.
|
|
Additionally, we flush the changes right to disk"""
|
|
|
|
def flush_changes(self, *args, **kwargs):
|
|
rval = non_const_func(self, *args, **kwargs)
|
|
self._dirty = True
|
|
self.write()
|
|
return rval
|
|
# END wrapper method
|
|
flush_changes.__name__ = non_const_func.__name__
|
|
return flush_changes
|
|
|
|
|
|
class SectionConstraint(object):
|
|
|
|
"""Constrains a ConfigParser to only option commands which are constrained to
|
|
always use the section we have been initialized with.
|
|
|
|
It supports all ConfigParser methods that operate on an option.
|
|
|
|
:note:
|
|
If used as a context manager, will release the wrapped ConfigParser."""
|
|
__slots__ = ("_config", "_section_name")
|
|
_valid_attrs_ = ("get_value", "set_value", "get", "set", "getint", "getfloat", "getboolean", "has_option",
|
|
"remove_section", "remove_option", "options")
|
|
|
|
def __init__(self, config, section):
|
|
self._config = config
|
|
self._section_name = section
|
|
|
|
def __del__(self):
|
|
# Yes, for some reason, we have to call it explicitly for it to work in PY3 !
|
|
# Apparently __del__ doesn't get call anymore if refcount becomes 0
|
|
# Ridiculous ... .
|
|
self._config.release()
|
|
|
|
def __getattr__(self, attr):
|
|
if attr in self._valid_attrs_:
|
|
return lambda *args, **kwargs: self._call_config(attr, *args, **kwargs)
|
|
return super(SectionConstraint, self).__getattribute__(attr)
|
|
|
|
def _call_config(self, method, *args, **kwargs):
|
|
"""Call the configuration at the given method which must take a section name
|
|
as first argument"""
|
|
return getattr(self._config, method)(self._section_name, *args, **kwargs)
|
|
|
|
@property
|
|
def config(self):
|
|
"""return: Configparser instance we constrain"""
|
|
return self._config
|
|
|
|
def release(self):
|
|
"""Equivalent to GitConfigParser.release(), which is called on our underlying parser instance"""
|
|
return self._config.release()
|
|
|
|
def __enter__(self):
|
|
self._config.__enter__()
|
|
return self
|
|
|
|
def __exit__(self, exception_type, exception_value, traceback):
|
|
self._config.__exit__(exception_type, exception_value, traceback)
|
|
|
|
|
|
class GitConfigParser(with_metaclass(MetaParserBuilder, cp.RawConfigParser, object)):
|
|
|
|
"""Implements specifics required to read git style configuration files.
|
|
|
|
This variation behaves much like the git.config command such that the configuration
|
|
will be read on demand based on the filepath given during initialization.
|
|
|
|
The changes will automatically be written once the instance goes out of scope, but
|
|
can be triggered manually as well.
|
|
|
|
The configuration file will be locked if you intend to change values preventing other
|
|
instances to write concurrently.
|
|
|
|
:note:
|
|
The config is case-sensitive even when queried, hence section and option names
|
|
must match perfectly.
|
|
If used as a context manager, will release the locked file."""
|
|
|
|
#{ Configuration
|
|
# The lock type determines the type of lock to use in new configuration readers.
|
|
# They must be compatible to the LockFile interface.
|
|
# A suitable alternative would be the BlockingLockFile
|
|
t_lock = LockFile
|
|
re_comment = re.compile(r'^\s*[#;]')
|
|
|
|
#} END configuration
|
|
|
|
optvalueonly_source = r'\s*(?P<option>[^:=\s][^:=]*)'
|
|
|
|
OPTVALUEONLY = re.compile(optvalueonly_source)
|
|
|
|
OPTCRE = re.compile(optvalueonly_source + r'\s*(?P<vi>[:=])\s*' + r'(?P<value>.*)$')
|
|
|
|
del optvalueonly_source
|
|
|
|
# list of RawConfigParser methods able to change the instance
|
|
_mutating_methods_ = ("add_section", "remove_section", "remove_option", "set")
|
|
|
|
def __init__(self, file_or_files, read_only=True, merge_includes=True):
|
|
"""Initialize a configuration reader to read the given file_or_files and to
|
|
possibly allow changes to it by setting read_only False
|
|
|
|
:param file_or_files:
|
|
A single file path or file objects or multiple of these
|
|
|
|
:param read_only:
|
|
If True, the ConfigParser may only read the data , but not change it.
|
|
If False, only a single file path or file object may be given. We will write back the changes
|
|
when they happen, or when the ConfigParser is released. This will not happen if other
|
|
configuration files have been included
|
|
:param merge_includes: if True, we will read files mentioned in [include] sections and merge their
|
|
contents into ours. This makes it impossible to write back an individual configuration file.
|
|
Thus, if you want to modify a single configuration file, turn this off to leave the original
|
|
dataset unaltered when reading it."""
|
|
cp.RawConfigParser.__init__(self, dict_type=OrderedDict)
|
|
|
|
# Used in python 3, needs to stay in sync with sections for underlying implementation to work
|
|
if not hasattr(self, '_proxies'):
|
|
self._proxies = self._dict()
|
|
|
|
self._file_or_files = file_or_files
|
|
self._read_only = read_only
|
|
self._dirty = False
|
|
self._is_initialized = False
|
|
self._merge_includes = merge_includes
|
|
self._lock = None
|
|
self._acquire_lock()
|
|
|
|
def _acquire_lock(self):
|
|
if not self._read_only:
|
|
if not self._lock:
|
|
if isinstance(self._file_or_files, (tuple, list)):
|
|
raise ValueError(
|
|
"Write-ConfigParsers can operate on a single file only, multiple files have been passed")
|
|
# END single file check
|
|
|
|
file_or_files = self._file_or_files
|
|
if not isinstance(self._file_or_files, string_types):
|
|
file_or_files = self._file_or_files.name
|
|
# END get filename from handle/stream
|
|
# initialize lock base - we want to write
|
|
self._lock = self.t_lock(file_or_files)
|
|
# END lock check
|
|
|
|
self._lock._obtain_lock()
|
|
# END read-only check
|
|
|
|
def __del__(self):
|
|
"""Write pending changes if required and release locks"""
|
|
# NOTE: only consistent in PY2
|
|
self.release()
|
|
|
|
def __enter__(self):
|
|
self._acquire_lock()
|
|
return self
|
|
|
|
def __exit__(self, exception_type, exception_value, traceback):
|
|
self.release()
|
|
|
|
def release(self):
|
|
"""Flush changes and release the configuration write lock. This instance must not be used anymore afterwards.
|
|
In Python 3, it's required to explicitly release locks and flush changes, as __del__ is not called
|
|
deterministically anymore."""
|
|
# checking for the lock here makes sure we do not raise during write()
|
|
# in case an invalid parser was created who could not get a lock
|
|
if self.read_only or (self._lock and not self._lock._has_lock()):
|
|
return
|
|
|
|
try:
|
|
try:
|
|
self.write()
|
|
except IOError:
|
|
log.error("Exception during destruction of GitConfigParser", exc_info=True)
|
|
except ReferenceError:
|
|
# This happens in PY3 ... and usually means that some state cannot be written
|
|
# as the sections dict cannot be iterated
|
|
# Usually when shutting down the interpreter, don'y know how to fix this
|
|
pass
|
|
finally:
|
|
self._lock._release_lock()
|
|
|
|
def optionxform(self, optionstr):
|
|
"""Do not transform options in any way when writing"""
|
|
return optionstr
|
|
|
|
def _read(self, fp, fpname):
|
|
"""A direct copy of the py2.4 version of the super class's _read method
|
|
to assure it uses ordered dicts. Had to change one line to make it work.
|
|
|
|
Future versions have this fixed, but in fact its quite embarrassing for the
|
|
guys not to have done it right in the first place !
|
|
|
|
Removed big comments to make it more compact.
|
|
|
|
Made sure it ignores initial whitespace as git uses tabs"""
|
|
cursect = None # None, or a dictionary
|
|
optname = None
|
|
lineno = 0
|
|
is_multi_line = False
|
|
e = None # None, or an exception
|
|
|
|
def string_decode(v):
|
|
if v[-1] == '\\':
|
|
v = v[:-1]
|
|
# end cut trailing escapes to prevent decode error
|
|
|
|
if PY3:
|
|
return v.encode(defenc).decode('unicode_escape')
|
|
else:
|
|
return v.decode('string_escape')
|
|
# end
|
|
# end
|
|
|
|
while True:
|
|
# we assume to read binary !
|
|
line = fp.readline().decode(defenc)
|
|
if not line:
|
|
break
|
|
lineno = lineno + 1
|
|
# comment or blank line?
|
|
if line.strip() == '' or self.re_comment.match(line):
|
|
continue
|
|
if line.split(None, 1)[0].lower() == 'rem' and line[0] in "rR":
|
|
# no leading whitespace
|
|
continue
|
|
|
|
# is it a section header?
|
|
mo = self.SECTCRE.match(line.strip())
|
|
if not is_multi_line and mo:
|
|
sectname = mo.group('header').strip()
|
|
if sectname in self._sections:
|
|
cursect = self._sections[sectname]
|
|
elif sectname == cp.DEFAULTSECT:
|
|
cursect = self._defaults
|
|
else:
|
|
cursect = self._dict((('__name__', sectname),))
|
|
self._sections[sectname] = cursect
|
|
self._proxies[sectname] = None
|
|
# So sections can't start with a continuation line
|
|
optname = None
|
|
# no section header in the file?
|
|
elif cursect is None:
|
|
raise cp.MissingSectionHeaderError(fpname, lineno, line)
|
|
# an option line?
|
|
elif not is_multi_line:
|
|
mo = self.OPTCRE.match(line)
|
|
if mo:
|
|
# We might just have handled the last line, which could contain a quotation we want to remove
|
|
optname, vi, optval = mo.group('option', 'vi', 'value')
|
|
if vi in ('=', ':') and ';' in optval and not optval.strip().startswith('"'):
|
|
pos = optval.find(';')
|
|
if pos != -1 and optval[pos - 1].isspace():
|
|
optval = optval[:pos]
|
|
optval = optval.strip()
|
|
if optval == '""':
|
|
optval = ''
|
|
# end handle empty string
|
|
optname = self.optionxform(optname.rstrip())
|
|
if len(optval) > 1 and optval[0] == '"' and optval[-1] != '"':
|
|
is_multi_line = True
|
|
optval = string_decode(optval[1:])
|
|
# end handle multi-line
|
|
cursect[optname] = optval
|
|
else:
|
|
# check if it's an option with no value - it's just ignored by git
|
|
if not self.OPTVALUEONLY.match(line):
|
|
if not e:
|
|
e = cp.ParsingError(fpname)
|
|
e.append(lineno, repr(line))
|
|
continue
|
|
else:
|
|
line = line.rstrip()
|
|
if line.endswith('"'):
|
|
is_multi_line = False
|
|
line = line[:-1]
|
|
# end handle quotations
|
|
cursect[optname] += string_decode(line)
|
|
# END parse section or option
|
|
# END while reading
|
|
|
|
# if any parsing errors occurred, raise an exception
|
|
if e:
|
|
raise e
|
|
|
|
def _has_includes(self):
|
|
return self._merge_includes and self.has_section('include')
|
|
|
|
def read(self):
|
|
"""Reads the data stored in the files we have been initialized with. It will
|
|
ignore files that cannot be read, possibly leaving an empty configuration
|
|
|
|
:return: Nothing
|
|
:raise IOError: if a file cannot be handled"""
|
|
if self._is_initialized:
|
|
return
|
|
self._is_initialized = True
|
|
|
|
if not isinstance(self._file_or_files, (tuple, list)):
|
|
files_to_read = [self._file_or_files]
|
|
else:
|
|
files_to_read = list(self._file_or_files)
|
|
# end assure we have a copy of the paths to handle
|
|
|
|
seen = set(files_to_read)
|
|
num_read_include_files = 0
|
|
while files_to_read:
|
|
file_path = files_to_read.pop(0)
|
|
fp = file_path
|
|
file_ok = False
|
|
|
|
if hasattr(fp, "seek"):
|
|
self._read(fp, fp.name)
|
|
else:
|
|
# assume a path if it is not a file-object
|
|
try:
|
|
with open(file_path, 'rb') as fp:
|
|
file_ok = True
|
|
self._read(fp, fp.name)
|
|
except IOError:
|
|
continue
|
|
|
|
# Read includes and append those that we didn't handle yet
|
|
# We expect all paths to be normalized and absolute (and will assure that is the case)
|
|
if self._has_includes():
|
|
for _, include_path in self.items('include'):
|
|
if include_path.startswith('~'):
|
|
include_path = osp.expanduser(include_path)
|
|
if not osp.isabs(include_path):
|
|
if not file_ok:
|
|
continue
|
|
# end ignore relative paths if we don't know the configuration file path
|
|
assert osp.isabs(file_path), "Need absolute paths to be sure our cycle checks will work"
|
|
include_path = osp.join(osp.dirname(file_path), include_path)
|
|
# end make include path absolute
|
|
include_path = osp.normpath(include_path)
|
|
if include_path in seen or not os.access(include_path, os.R_OK):
|
|
continue
|
|
seen.add(include_path)
|
|
# insert included file to the top to be considered first
|
|
files_to_read.insert(0, include_path)
|
|
num_read_include_files += 1
|
|
# each include path in configuration file
|
|
# end handle includes
|
|
# END for each file object to read
|
|
|
|
# If there was no file included, we can safely write back (potentially) the configuration file
|
|
# without altering it's meaning
|
|
if num_read_include_files == 0:
|
|
self._merge_includes = False
|
|
# end
|
|
|
|
def _write(self, fp):
|
|
"""Write an .ini-format representation of the configuration state in
|
|
git compatible format"""
|
|
def write_section(name, section_dict):
|
|
fp.write(("[%s]\n" % name).encode(defenc))
|
|
for (key, value) in section_dict.items():
|
|
if key != "__name__":
|
|
fp.write(("\t%s = %s\n" % (key, self._value_to_string(value).replace('\n', '\n\t'))).encode(defenc))
|
|
# END if key is not __name__
|
|
# END section writing
|
|
|
|
if self._defaults:
|
|
write_section(cp.DEFAULTSECT, self._defaults)
|
|
for name, value in self._sections.items():
|
|
write_section(name, value)
|
|
|
|
def items(self, section_name):
|
|
""":return: list((option, value), ...) pairs of all items in the given section"""
|
|
return [(k, v) for k, v in super(GitConfigParser, self).items(section_name) if k != '__name__']
|
|
|
|
@needs_values
|
|
def write(self):
|
|
"""Write changes to our file, if there are changes at all
|
|
|
|
:raise IOError: if this is a read-only writer instance or if we could not obtain
|
|
a file lock"""
|
|
self._assure_writable("write")
|
|
if not self._dirty:
|
|
return
|
|
|
|
if isinstance(self._file_or_files, (list, tuple)):
|
|
raise AssertionError("Cannot write back if there is not exactly a single file to write to, have %i files"
|
|
% len(self._file_or_files))
|
|
# end assert multiple files
|
|
|
|
if self._has_includes():
|
|
log.debug("Skipping write-back of configuration file as include files were merged in." +
|
|
"Set merge_includes=False to prevent this.")
|
|
return
|
|
# end
|
|
|
|
fp = self._file_or_files
|
|
|
|
# we have a physical file on disk, so get a lock
|
|
is_file_lock = isinstance(fp, string_types + (FileType, ))
|
|
if is_file_lock:
|
|
self._lock._obtain_lock()
|
|
if not hasattr(fp, "seek"):
|
|
with open(self._file_or_files, "wb") as fp:
|
|
self._write(fp)
|
|
else:
|
|
fp.seek(0)
|
|
# make sure we do not overwrite into an existing file
|
|
if hasattr(fp, 'truncate'):
|
|
fp.truncate()
|
|
self._write(fp)
|
|
|
|
def _assure_writable(self, method_name):
|
|
if self.read_only:
|
|
raise IOError("Cannot execute non-constant method %s.%s" % (self, method_name))
|
|
|
|
def add_section(self, section):
|
|
"""Assures added options will stay in order"""
|
|
return super(GitConfigParser, self).add_section(section)
|
|
|
|
@property
|
|
def read_only(self):
|
|
""":return: True if this instance may change the configuration file"""
|
|
return self._read_only
|
|
|
|
def get_value(self, section, option, default=None):
|
|
"""
|
|
:param default:
|
|
If not None, the given default value will be returned in case
|
|
the option did not exist
|
|
:return: a properly typed value, either int, float or string
|
|
|
|
:raise TypeError: in case the value could not be understood
|
|
Otherwise the exceptions known to the ConfigParser will be raised."""
|
|
try:
|
|
valuestr = self.get(section, option)
|
|
except Exception:
|
|
if default is not None:
|
|
return default
|
|
raise
|
|
|
|
types = (int, float)
|
|
for numtype in types:
|
|
try:
|
|
val = numtype(valuestr)
|
|
|
|
# truncated value ?
|
|
if val != float(valuestr):
|
|
continue
|
|
|
|
return val
|
|
except (ValueError, TypeError):
|
|
continue
|
|
# END for each numeric type
|
|
|
|
# try boolean values as git uses them
|
|
vl = valuestr.lower()
|
|
if vl == 'false':
|
|
return False
|
|
if vl == 'true':
|
|
return True
|
|
|
|
if not isinstance(valuestr, string_types):
|
|
raise TypeError("Invalid value type: only int, long, float and str are allowed", valuestr)
|
|
|
|
return valuestr
|
|
|
|
def _value_to_string(self, value):
|
|
if isinstance(value, (int, float, bool)):
|
|
return str(value)
|
|
return force_text(value)
|
|
|
|
@needs_values
|
|
@set_dirty_and_flush_changes
|
|
def set_value(self, section, option, value):
|
|
"""Sets the given option in section to the given value.
|
|
It will create the section if required, and will not throw as opposed to the default
|
|
ConfigParser 'set' method.
|
|
|
|
:param section: Name of the section in which the option resides or should reside
|
|
:param option: Name of the options whose value to set
|
|
|
|
:param value: Value to set the option to. It must be a string or convertible
|
|
to a string
|
|
:return: this instance"""
|
|
if not self.has_section(section):
|
|
self.add_section(section)
|
|
self.set(section, option, self._value_to_string(value))
|
|
return self
|
|
|
|
def rename_section(self, section, new_name):
|
|
"""rename the given section to new_name
|
|
:raise ValueError: if section doesn't exit
|
|
:raise ValueError: if a section with new_name does already exist
|
|
:return: this instance
|
|
"""
|
|
if not self.has_section(section):
|
|
raise ValueError("Source section '%s' doesn't exist" % section)
|
|
if self.has_section(new_name):
|
|
raise ValueError("Destination section '%s' already exists" % new_name)
|
|
|
|
super(GitConfigParser, self).add_section(new_name)
|
|
for k, v in self.items(section):
|
|
self.set(new_name, k, self._value_to_string(v))
|
|
# end for each value to copy
|
|
|
|
# This call writes back the changes, which is why we don't have the respective decorator
|
|
self.remove_section(section)
|
|
return self
|