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1# Copyright (C) 2008, 2009 Michael Trier (mtrier@gmail.com) and contributors
2#
3# This module is part of GitPython and is released under the
4# 3-Clause BSD License: https://opensource.org/license/bsd-3-clause/
6"""Parser for reading and writing configuration files."""
8__all__ = ["GitConfigParser", "SectionConstraint"]
10import abc
11import configparser as cp
12import fnmatch
13from functools import wraps
14import inspect
15from io import BufferedReader, IOBase
16import logging
17import os
18import os.path as osp
19import re
20import sys
22from git.compat import defenc, force_text
23from git.util import LockFile
25# typing-------------------------------------------------------
27from typing import (
28 Any,
29 Callable,
30 Generic,
31 IO,
32 List,
33 Dict,
34 Sequence,
35 TYPE_CHECKING,
36 Tuple,
37 TypeVar,
38 Union,
39 cast,
40)
42from git.types import Lit_config_levels, ConfigLevels_Tup, PathLike, assert_never, _T
44if TYPE_CHECKING:
45 from io import BytesIO
47 from git.repo.base import Repo
49T_ConfigParser = TypeVar("T_ConfigParser", bound="GitConfigParser")
50T_OMD_value = TypeVar("T_OMD_value", str, bytes, int, float, bool)
52if sys.version_info[:3] < (3, 7, 2):
53 # typing.Ordereddict not added until Python 3.7.2.
54 from collections import OrderedDict
56 OrderedDict_OMD = OrderedDict
57else:
58 from typing import OrderedDict
60 OrderedDict_OMD = OrderedDict[str, List[T_OMD_value]] # type: ignore[assignment, misc]
62# -------------------------------------------------------------
64_logger = logging.getLogger(__name__)
66CONFIG_LEVELS: ConfigLevels_Tup = ("system", "user", "global", "repository")
67"""The configuration level of a configuration file."""
69CONDITIONAL_INCLUDE_REGEXP = re.compile(r"(?<=includeIf )\"(gitdir|gitdir/i|onbranch|hasconfig:remote\.\*\.url):(.+)\"")
70"""Section pattern to detect conditional includes.
72See: https://git-scm.com/docs/git-config#_conditional_includes
73"""
76class MetaParserBuilder(abc.ABCMeta): # noqa: B024
77 """Utility class wrapping base-class methods into decorators that assure read-only
78 properties."""
80 def __new__(cls, name: str, bases: Tuple, clsdict: Dict[str, Any]) -> "MetaParserBuilder":
81 """Equip all base-class methods with a needs_values decorator, and all non-const
82 methods with a :func:`set_dirty_and_flush_changes` decorator in addition to
83 that.
84 """
85 kmm = "_mutating_methods_"
86 if kmm in clsdict:
87 mutating_methods = clsdict[kmm]
88 for base in bases:
89 methods = (t for t in inspect.getmembers(base, inspect.isroutine) if not t[0].startswith("_"))
90 for method_name, method in methods:
91 if method_name in clsdict:
92 continue
93 method_with_values = needs_values(method)
94 if method_name in mutating_methods:
95 method_with_values = set_dirty_and_flush_changes(method_with_values)
96 # END mutating methods handling
98 clsdict[method_name] = method_with_values
99 # END for each name/method pair
100 # END for each base
101 # END if mutating methods configuration is set
103 new_type = super().__new__(cls, name, bases, clsdict)
104 return new_type
107def needs_values(func: Callable[..., _T]) -> Callable[..., _T]:
108 """Return a method for ensuring we read values (on demand) before we try to access
109 them."""
111 @wraps(func)
112 def assure_data_present(self: "GitConfigParser", *args: Any, **kwargs: Any) -> _T:
113 self.read()
114 return func(self, *args, **kwargs)
116 # END wrapper method
117 return assure_data_present
120def set_dirty_and_flush_changes(non_const_func: Callable[..., _T]) -> Callable[..., _T]:
121 """Return a method that checks whether given non constant function may be called.
123 If so, the instance will be set dirty. Additionally, we flush the changes right to
124 disk.
125 """
127 def flush_changes(self: "GitConfigParser", *args: Any, **kwargs: Any) -> _T:
128 rval = non_const_func(self, *args, **kwargs)
129 self._dirty = True
130 self.write()
131 return rval
133 # END wrapper method
134 flush_changes.__name__ = non_const_func.__name__
135 return flush_changes
138class SectionConstraint(Generic[T_ConfigParser]):
139 """Constrains a ConfigParser to only option commands which are constrained to
140 always use the section we have been initialized with.
142 It supports all ConfigParser methods that operate on an option.
144 :note:
145 If used as a context manager, will release the wrapped ConfigParser.
146 """
148 __slots__ = ("_config", "_section_name")
150 _valid_attrs_ = (
151 "get_value",
152 "set_value",
153 "get",
154 "set",
155 "getint",
156 "getfloat",
157 "getboolean",
158 "has_option",
159 "remove_section",
160 "remove_option",
161 "options",
162 )
164 def __init__(self, config: T_ConfigParser, section: str) -> None:
165 self._config = config
166 self._section_name = section
168 def __del__(self) -> None:
169 # Yes, for some reason, we have to call it explicitly for it to work in PY3 !
170 # Apparently __del__ doesn't get call anymore if refcount becomes 0
171 # Ridiculous ... .
172 self._config.release()
174 def __getattr__(self, attr: str) -> Any:
175 if attr in self._valid_attrs_:
176 return lambda *args, **kwargs: self._call_config(attr, *args, **kwargs)
177 return super().__getattribute__(attr)
179 def _call_config(self, method: str, *args: Any, **kwargs: Any) -> Any:
180 """Call the configuration at the given method which must take a section name as
181 first argument."""
182 return getattr(self._config, method)(self._section_name, *args, **kwargs)
184 @property
185 def config(self) -> T_ConfigParser:
186 """return: ConfigParser instance we constrain"""
187 return self._config
189 def release(self) -> None:
190 """Equivalent to :meth:`GitConfigParser.release`, which is called on our
191 underlying parser instance."""
192 return self._config.release()
194 def __enter__(self) -> "SectionConstraint[T_ConfigParser]":
195 self._config.__enter__()
196 return self
198 def __exit__(self, exception_type: str, exception_value: str, traceback: str) -> None:
199 self._config.__exit__(exception_type, exception_value, traceback)
202class _OMD(OrderedDict_OMD):
203 """Ordered multi-dict."""
205 def __setitem__(self, key: str, value: _T) -> None:
206 super().__setitem__(key, [value])
208 def add(self, key: str, value: Any) -> None:
209 if key not in self:
210 super().__setitem__(key, [value])
211 return
213 super().__getitem__(key).append(value)
215 def setall(self, key: str, values: List[_T]) -> None:
216 super().__setitem__(key, values)
218 def __getitem__(self, key: str) -> Any:
219 return super().__getitem__(key)[-1]
221 def getlast(self, key: str) -> Any:
222 return super().__getitem__(key)[-1]
224 def setlast(self, key: str, value: Any) -> None:
225 if key not in self:
226 super().__setitem__(key, [value])
227 return
229 prior = super().__getitem__(key)
230 prior[-1] = value
232 def get(self, key: str, default: Union[_T, None] = None) -> Union[_T, None]:
233 return super().get(key, [default])[-1]
235 def getall(self, key: str) -> List[_T]:
236 return super().__getitem__(key)
238 def items(self) -> List[Tuple[str, _T]]: # type: ignore[override]
239 """List of (key, last value for key)."""
240 return [(k, self[k]) for k in self]
242 def items_all(self) -> List[Tuple[str, List[_T]]]:
243 """List of (key, list of values for key)."""
244 return [(k, self.getall(k)) for k in self]
247def get_config_path(config_level: Lit_config_levels) -> str:
248 # We do not support an absolute path of the gitconfig on Windows.
249 # Use the global config instead.
250 if sys.platform == "win32" and config_level == "system":
251 config_level = "global"
253 if config_level == "system":
254 return "/etc/gitconfig"
255 elif config_level == "user":
256 config_home = os.environ.get("XDG_CONFIG_HOME") or osp.join(os.environ.get("HOME", "~"), ".config")
257 return osp.normpath(osp.expanduser(osp.join(config_home, "git", "config")))
258 elif config_level == "global":
259 return osp.normpath(osp.expanduser("~/.gitconfig"))
260 elif config_level == "repository":
261 raise ValueError("No repo to get repository configuration from. Use Repo._get_config_path")
262 else:
263 # Should not reach here. Will raise ValueError if does. Static typing will warn
264 # about missing elifs.
265 assert_never( # type: ignore[unreachable]
266 config_level,
267 ValueError(f"Invalid configuration level: {config_level!r}"),
268 )
271class GitConfigParser(cp.RawConfigParser, metaclass=MetaParserBuilder):
272 """Implements specifics required to read git style configuration files.
274 This variation behaves much like the :manpage:`git-config(1)` command, such that the
275 configuration will be read on demand based on the filepath given during
276 initialization.
278 The changes will automatically be written once the instance goes out of scope, but
279 can be triggered manually as well.
281 The configuration file will be locked if you intend to change values preventing
282 other instances to write concurrently.
284 :note:
285 The config is case-sensitive even when queried, hence section and option names
286 must match perfectly.
288 :note:
289 If used as a context manager, this will release the locked file.
290 """
292 # { Configuration
293 t_lock = LockFile
294 """The lock type determines the type of lock to use in new configuration readers.
296 They must be compatible to the :class:`~git.util.LockFile` interface.
297 A suitable alternative would be the :class:`~git.util.BlockingLockFile`.
298 """
300 re_comment = re.compile(r"^\s*[#;]")
301 # } END configuration
303 optvalueonly_source = r"\s*(?P<option>[^:=\s][^:=]*)"
305 OPTVALUEONLY = re.compile(optvalueonly_source)
307 OPTCRE = re.compile(optvalueonly_source + r"\s*(?P<vi>[:=])\s*" + r"(?P<value>.*)$")
309 del optvalueonly_source
311 _mutating_methods_ = ("add_section", "remove_section", "remove_option", "set")
312 """Names of :class:`~configparser.RawConfigParser` methods able to change the
313 instance."""
315 def __init__(
316 self,
317 file_or_files: Union[None, PathLike, "BytesIO", Sequence[Union[PathLike, "BytesIO"]]] = None,
318 read_only: bool = True,
319 merge_includes: bool = True,
320 config_level: Union[Lit_config_levels, None] = None,
321 repo: Union["Repo", None] = None,
322 ) -> None:
323 """Initialize a configuration reader to read the given `file_or_files` and to
324 possibly allow changes to it by setting `read_only` False.
326 :param file_or_files:
327 A file path or file object, or a sequence of possibly more than one of them.
329 :param read_only:
330 If ``True``, the ConfigParser may only read the data, but not change it.
331 If ``False``, only a single file path or file object may be given. We will
332 write back the changes when they happen, or when the ConfigParser is
333 released. This will not happen if other configuration files have been
334 included.
336 :param merge_includes:
337 If ``True``, we will read files mentioned in ``[include]`` sections and
338 merge their contents into ours. This makes it impossible to write back an
339 individual configuration file. Thus, if you want to modify a single
340 configuration file, turn this off to leave the original dataset unaltered
341 when reading it.
343 :param repo:
344 Reference to repository to use if ``[includeIf]`` sections are found in
345 configuration files.
346 """
347 cp.RawConfigParser.__init__(self, dict_type=_OMD)
348 self._dict: Callable[..., _OMD]
349 self._defaults: _OMD
350 self._sections: _OMD
352 # Used in Python 3. Needs to stay in sync with sections for underlying
353 # implementation to work.
354 if not hasattr(self, "_proxies"):
355 self._proxies = self._dict()
357 if file_or_files is not None:
358 self._file_or_files: Union[PathLike, "BytesIO", Sequence[Union[PathLike, "BytesIO"]]] = file_or_files
359 else:
360 if config_level is None:
361 if read_only:
362 self._file_or_files = [
363 get_config_path(cast(Lit_config_levels, f)) for f in CONFIG_LEVELS if f != "repository"
364 ]
365 else:
366 raise ValueError("No configuration level or configuration files specified")
367 else:
368 self._file_or_files = [get_config_path(config_level)]
370 self._read_only = read_only
371 self._dirty = False
372 self._is_initialized = False
373 self._merge_includes = merge_includes
374 self._repo = repo
375 self._lock: Union["LockFile", None] = None
376 self._acquire_lock()
378 def _acquire_lock(self) -> None:
379 if not self._read_only:
380 if not self._lock:
381 if isinstance(self._file_or_files, (str, os.PathLike)):
382 file_or_files = self._file_or_files
383 elif isinstance(self._file_or_files, (tuple, list, Sequence)):
384 raise ValueError(
385 "Write-ConfigParsers can operate on a single file only, multiple files have been passed"
386 )
387 else:
388 file_or_files = self._file_or_files.name
390 # END get filename from handle/stream
391 # Initialize lock base - we want to write.
392 self._lock = self.t_lock(file_or_files)
393 # END lock check
395 self._lock._obtain_lock()
396 # END read-only check
398 def __del__(self) -> None:
399 """Write pending changes if required and release locks."""
400 # NOTE: Only consistent in Python 2.
401 self.release()
403 def __enter__(self) -> "GitConfigParser":
404 self._acquire_lock()
405 return self
407 def __exit__(self, *args: Any) -> None:
408 self.release()
410 def release(self) -> None:
411 """Flush changes and release the configuration write lock. This instance must
412 not be used anymore afterwards.
414 In Python 3, it's required to explicitly release locks and flush changes, as
415 ``__del__`` is not called deterministically anymore.
416 """
417 # Checking for the lock here makes sure we do not raise during write()
418 # in case an invalid parser was created who could not get a lock.
419 if self.read_only or (self._lock and not self._lock._has_lock()):
420 return
422 try:
423 self.write()
424 except IOError:
425 _logger.error("Exception during destruction of GitConfigParser", exc_info=True)
426 except ReferenceError:
427 # This happens in Python 3... and usually means that some state cannot be
428 # written as the sections dict cannot be iterated. This usually happens when
429 # the interpreter is shutting down. Can it be fixed?
430 pass
431 finally:
432 if self._lock is not None:
433 self._lock._release_lock()
435 def optionxform(self, optionstr: str) -> str:
436 """Do not transform options in any way when writing."""
437 return optionstr
439 def _read(self, fp: Union[BufferedReader, IO[bytes]], fpname: str) -> None:
440 """Originally a direct copy of the Python 2.4 version of
441 :meth:`RawConfigParser._read <configparser.RawConfigParser._read>`, to ensure it
442 uses ordered dicts.
444 The ordering bug was fixed in Python 2.4, and dict itself keeps ordering since
445 Python 3.7. This has some other changes, especially that it ignores initial
446 whitespace, since git uses tabs. (Big comments are removed to be more compact.)
447 """
448 cursect = None # None, or a dictionary.
449 optname = None
450 lineno = 0
451 is_multi_line = False
452 e = None # None, or an exception.
454 def string_decode(v: str) -> str:
455 if v and v.endswith("\\"):
456 v = v[:-1]
457 # END cut trailing escapes to prevent decode error
459 return v.encode(defenc).decode("unicode_escape")
461 # END string_decode
463 while True:
464 # We assume to read binary!
465 line = fp.readline().decode(defenc)
466 if not line:
467 break
468 lineno = lineno + 1
469 # Comment or blank line?
470 if line.strip() == "" or self.re_comment.match(line):
471 continue
472 if line.split(None, 1)[0].lower() == "rem" and line[0] in "rR":
473 # No leading whitespace.
474 continue
476 # Is it a section header?
477 mo = self.SECTCRE.match(line.strip())
478 if not is_multi_line and mo:
479 sectname: str = mo.group("header").strip()
480 if sectname in self._sections:
481 cursect = self._sections[sectname]
482 elif sectname == cp.DEFAULTSECT:
483 cursect = self._defaults
484 else:
485 cursect = self._dict((("__name__", sectname),))
486 self._sections[sectname] = cursect
487 self._proxies[sectname] = None
488 # So sections can't start with a continuation line.
489 optname = None
490 # No section header in the file?
491 elif cursect is None:
492 raise cp.MissingSectionHeaderError(fpname, lineno, line)
493 # An option line?
494 elif not is_multi_line:
495 mo = self.OPTCRE.match(line)
496 if mo:
497 # We might just have handled the last line, which could contain a quotation we want to remove.
498 optname, vi, optval = mo.group("option", "vi", "value")
499 optname = self.optionxform(optname.rstrip())
501 if vi in ("=", ":") and ";" in optval and not optval.strip().startswith('"'):
502 pos = optval.find(";")
503 if pos != -1 and optval[pos - 1].isspace():
504 optval = optval[:pos]
505 optval = optval.strip()
507 if len(optval) < 2 or optval[0] != '"':
508 # Does not open quoting.
509 pass
510 elif optval[-1] != '"':
511 # Opens quoting and does not close: appears to start multi-line quoting.
512 is_multi_line = True
513 optval = string_decode(optval[1:])
514 elif optval.find("\\", 1, -1) == -1 and optval.find('"', 1, -1) == -1:
515 # Opens and closes quoting. Single line, and all we need is quote removal.
516 optval = optval[1:-1]
517 # TODO: Handle other quoted content, especially well-formed backslash escapes.
519 # Preserves multiple values for duplicate optnames.
520 cursect.add(optname, optval)
521 else:
522 # Check if it's an option with no value - it's just ignored by git.
523 if not self.OPTVALUEONLY.match(line):
524 if not e:
525 e = cp.ParsingError(fpname)
526 e.append(lineno, repr(line))
527 continue
528 else:
529 line = line.rstrip()
530 if line.endswith('"'):
531 is_multi_line = False
532 line = line[:-1]
533 # END handle quotations
534 optval = cursect.getlast(optname)
535 cursect.setlast(optname, optval + string_decode(line))
536 # END parse section or option
537 # END while reading
539 # If any parsing errors occurred, raise an exception.
540 if e:
541 raise e
543 def _has_includes(self) -> Union[bool, int]:
544 return self._merge_includes and len(self._included_paths())
546 def _included_paths(self) -> List[Tuple[str, str]]:
547 """List all paths that must be included to configuration.
549 :return:
550 The list of paths, where each path is a tuple of (option, value).
551 """
552 paths = []
554 for section in self.sections():
555 if section == "include":
556 paths += self.items(section)
558 match = CONDITIONAL_INCLUDE_REGEXP.search(section)
559 if match is None or self._repo is None:
560 continue
562 keyword = match.group(1)
563 value = match.group(2).strip()
565 if keyword in ["gitdir", "gitdir/i"]:
566 value = osp.expanduser(value)
568 if not any(value.startswith(s) for s in ["./", "/"]):
569 value = "**/" + value
570 if value.endswith("/"):
571 value += "**"
573 # Ensure that glob is always case insensitive if required.
574 if keyword.endswith("/i"):
575 value = re.sub(
576 r"[a-zA-Z]",
577 lambda m: "[{}{}]".format(m.group().lower(), m.group().upper()),
578 value,
579 )
580 if self._repo.git_dir:
581 if fnmatch.fnmatchcase(str(self._repo.git_dir), value):
582 paths += self.items(section)
584 elif keyword == "onbranch":
585 try:
586 branch_name = self._repo.active_branch.name
587 except TypeError:
588 # Ignore section if active branch cannot be retrieved.
589 continue
591 if fnmatch.fnmatchcase(branch_name, value):
592 paths += self.items(section)
593 elif keyword == "hasconfig:remote.*.url":
594 for remote in self._repo.remotes:
595 if fnmatch.fnmatchcase(remote.url, value):
596 paths += self.items(section)
597 break
598 return paths
600 def read(self) -> None: # type: ignore[override]
601 """Read the data stored in the files we have been initialized with.
603 This will ignore files that cannot be read, possibly leaving an empty
604 configuration.
606 :raise IOError:
607 If a file cannot be handled.
608 """
609 if self._is_initialized:
610 return
611 self._is_initialized = True
613 files_to_read: List[Union[PathLike, IO]] = [""]
614 if isinstance(self._file_or_files, (str, os.PathLike)):
615 # For str or Path, as str is a type of Sequence.
616 files_to_read = [self._file_or_files]
617 elif not isinstance(self._file_or_files, (tuple, list, Sequence)):
618 # Could merge with above isinstance once runtime type known.
619 files_to_read = [self._file_or_files]
620 else: # For lists or tuples.
621 files_to_read = list(self._file_or_files)
622 # END ensure we have a copy of the paths to handle
624 seen = set(files_to_read)
625 num_read_include_files = 0
626 while files_to_read:
627 file_path = files_to_read.pop(0)
628 file_ok = False
630 if hasattr(file_path, "seek"):
631 # Must be a file-object.
632 # TODO: Replace cast with assert to narrow type, once sure.
633 file_path = cast(IO[bytes], file_path)
634 self._read(file_path, file_path.name)
635 else:
636 # Assume a path if it is not a file-object.
637 file_path = cast(PathLike, file_path)
638 try:
639 with open(file_path, "rb") as fp:
640 file_ok = True
641 self._read(fp, fp.name)
642 except IOError:
643 continue
645 # Read includes and append those that we didn't handle yet. We expect all
646 # paths to be normalized and absolute (and will ensure that is the case).
647 if self._has_includes():
648 for _, include_path in self._included_paths():
649 if include_path.startswith("~"):
650 include_path = osp.expanduser(include_path)
651 if not osp.isabs(include_path):
652 if not file_ok:
653 continue
654 # END ignore relative paths if we don't know the configuration file path
655 file_path = cast(PathLike, file_path)
656 assert osp.isabs(file_path), "Need absolute paths to be sure our cycle checks will work"
657 include_path = osp.join(osp.dirname(file_path), include_path)
658 # END make include path absolute
659 include_path = osp.normpath(include_path)
660 if include_path in seen or not os.access(include_path, os.R_OK):
661 continue
662 seen.add(include_path)
663 # Insert included file to the top to be considered first.
664 files_to_read.insert(0, include_path)
665 num_read_include_files += 1
666 # END each include path in configuration file
667 # END handle includes
668 # END for each file object to read
670 # If there was no file included, we can safely write back (potentially) the
671 # configuration file without altering its meaning.
672 if num_read_include_files == 0:
673 self._merge_includes = False
675 def _write(self, fp: IO) -> None:
676 """Write an .ini-format representation of the configuration state in
677 git compatible format."""
679 def write_section(name: str, section_dict: _OMD) -> None:
680 fp.write(("[%s]\n" % name).encode(defenc))
682 values: Sequence[str] # Runtime only gets str in tests, but should be whatever _OMD stores.
683 v: str
684 for key, values in section_dict.items_all():
685 if key == "__name__":
686 continue
688 for v in values:
689 fp.write(("\t%s = %s\n" % (key, self._value_to_string(v).replace("\n", "\n\t"))).encode(defenc))
690 # END if key is not __name__
692 # END section writing
694 if self._defaults:
695 write_section(cp.DEFAULTSECT, self._defaults)
696 value: _OMD
698 for name, value in self._sections.items():
699 write_section(name, value)
701 def items(self, section_name: str) -> List[Tuple[str, str]]: # type: ignore[override]
702 """:return: list((option, value), ...) pairs of all items in the given section"""
703 return [(k, v) for k, v in super().items(section_name) if k != "__name__"]
705 def items_all(self, section_name: str) -> List[Tuple[str, List[str]]]:
706 """:return: list((option, [values...]), ...) pairs of all items in the given section"""
707 rv = _OMD(self._defaults)
709 for k, vs in self._sections[section_name].items_all():
710 if k == "__name__":
711 continue
713 if k in rv and rv.getall(k) == vs:
714 continue
716 for v in vs:
717 rv.add(k, v)
719 return rv.items_all()
721 @needs_values
722 def write(self) -> None:
723 """Write changes to our file, if there are changes at all.
725 :raise IOError:
726 If this is a read-only writer instance or if we could not obtain a file
727 lock.
728 """
729 self._assure_writable("write")
730 if not self._dirty:
731 return
733 if isinstance(self._file_or_files, (list, tuple)):
734 raise AssertionError(
735 "Cannot write back if there is not exactly a single file to write to, have %i files"
736 % len(self._file_or_files)
737 )
738 # END assert multiple files
740 if self._has_includes():
741 _logger.debug(
742 "Skipping write-back of configuration file as include files were merged in."
743 + "Set merge_includes=False to prevent this."
744 )
745 return
746 # END stop if we have include files
748 fp = self._file_or_files
750 # We have a physical file on disk, so get a lock.
751 is_file_lock = isinstance(fp, (str, os.PathLike, IOBase)) # TODO: Use PathLike (having dropped 3.5).
752 if is_file_lock and self._lock is not None: # Else raise error?
753 self._lock._obtain_lock()
755 if not hasattr(fp, "seek"):
756 fp = cast(PathLike, fp)
757 with open(fp, "wb") as fp_open:
758 self._write(fp_open)
759 else:
760 fp = cast("BytesIO", fp)
761 fp.seek(0)
762 # Make sure we do not overwrite into an existing file.
763 if hasattr(fp, "truncate"):
764 fp.truncate()
765 self._write(fp)
767 def _assure_writable(self, method_name: str) -> None:
768 if self.read_only:
769 raise IOError("Cannot execute non-constant method %s.%s" % (self, method_name))
771 def add_section(self, section: str) -> None:
772 """Assures added options will stay in order."""
773 return super().add_section(section)
775 @property
776 def read_only(self) -> bool:
777 """:return: ``True`` if this instance may change the configuration file"""
778 return self._read_only
780 # FIXME: Figure out if default or return type can really include bool.
781 def get_value(
782 self,
783 section: str,
784 option: str,
785 default: Union[int, float, str, bool, None] = None,
786 ) -> Union[int, float, str, bool]:
787 """Get an option's value.
789 If multiple values are specified for this option in the section, the last one
790 specified is returned.
792 :param default:
793 If not ``None``, the given default value will be returned in case the option
794 did not exist.
796 :return:
797 A properly typed value, either int, float or string
799 :raise TypeError:
800 In case the value could not be understood.
801 Otherwise the exceptions known to the ConfigParser will be raised.
802 """
803 try:
804 valuestr = self.get(section, option)
805 except Exception:
806 if default is not None:
807 return default
808 raise
810 return self._string_to_value(valuestr)
812 def get_values(
813 self,
814 section: str,
815 option: str,
816 default: Union[int, float, str, bool, None] = None,
817 ) -> List[Union[int, float, str, bool]]:
818 """Get an option's values.
820 If multiple values are specified for this option in the section, all are
821 returned.
823 :param default:
824 If not ``None``, a list containing the given default value will be returned
825 in case the option did not exist.
827 :return:
828 A list of properly typed values, either int, float or string
830 :raise TypeError:
831 In case the value could not be understood.
832 Otherwise the exceptions known to the ConfigParser will be raised.
833 """
834 try:
835 self.sections()
836 lst = self._sections[section].getall(option)
837 except Exception:
838 if default is not None:
839 return [default]
840 raise
842 return [self._string_to_value(valuestr) for valuestr in lst]
844 def _string_to_value(self, valuestr: str) -> Union[int, float, str, bool]:
845 types = (int, float)
846 for numtype in types:
847 try:
848 val = numtype(valuestr)
849 # truncated value ?
850 if val != float(valuestr):
851 continue
852 return val
853 except (ValueError, TypeError):
854 continue
855 # END for each numeric type
857 # Try boolean values as git uses them.
858 vl = valuestr.lower()
859 if vl == "false":
860 return False
861 if vl == "true":
862 return True
864 if not isinstance(valuestr, str):
865 raise TypeError(
866 "Invalid value type: only int, long, float and str are allowed",
867 valuestr,
868 )
870 return valuestr
872 def _value_to_string(self, value: Union[str, bytes, int, float, bool]) -> str:
873 if isinstance(value, (int, float, bool)):
874 return str(value)
875 return force_text(value)
877 @needs_values
878 @set_dirty_and_flush_changes
879 def set_value(self, section: str, option: str, value: Union[str, bytes, int, float, bool]) -> "GitConfigParser":
880 """Set the given option in section to the given value.
882 This will create the section if required, and will not throw as opposed to the
883 default ConfigParser ``set`` method.
885 :param section:
886 Name of the section in which the option resides or should reside.
888 :param option:
889 Name of the options whose value to set.
891 :param value:
892 Value to set the option to. It must be a string or convertible to a string.
894 :return:
895 This instance
896 """
897 if not self.has_section(section):
898 self.add_section(section)
899 self.set(section, option, self._value_to_string(value))
900 return self
902 @needs_values
903 @set_dirty_and_flush_changes
904 def add_value(self, section: str, option: str, value: Union[str, bytes, int, float, bool]) -> "GitConfigParser":
905 """Add a value for the given option in section.
907 This will create the section if required, and will not throw as opposed to the
908 default ConfigParser ``set`` method. The value becomes the new value of the
909 option as returned by :meth:`get_value`, and appends to the list of values
910 returned by :meth:`get_values`.
912 :param section:
913 Name of the section in which the option resides or should reside.
915 :param option:
916 Name of the option.
918 :param value:
919 Value to add to option. It must be a string or convertible to a string.
921 :return:
922 This instance
923 """
924 if not self.has_section(section):
925 self.add_section(section)
926 self._sections[section].add(option, self._value_to_string(value))
927 return self
929 def rename_section(self, section: str, new_name: str) -> "GitConfigParser":
930 """Rename the given section to `new_name`.
932 :raise ValueError:
933 If:
935 * `section` doesn't exist.
936 * A section with `new_name` does already exist.
938 :return:
939 This instance
940 """
941 if not self.has_section(section):
942 raise ValueError("Source section '%s' doesn't exist" % section)
943 if self.has_section(new_name):
944 raise ValueError("Destination section '%s' already exists" % new_name)
946 super().add_section(new_name)
947 new_section = self._sections[new_name]
948 for k, vs in self.items_all(section):
949 new_section.setall(k, vs)
950 # END for each value to copy
952 # This call writes back the changes, which is why we don't have the respective
953 # decorator.
954 self.remove_section(section)
955 return self