2 This file is part of notmuch.
4 Notmuch is free software: you can redistribute it and/or modify it
5 under the terms of the GNU General Public License as published by the
6 Free Software Foundation, either version 3 of the License, or (at your
7 option) any later version.
9 Notmuch is distributed in the hope that it will be useful, but WITHOUT
10 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 You should have received a copy of the GNU General Public License
15 along with notmuch. If not, see <http://www.gnu.org/licenses/>.
17 Copyright 2010 Sebastian Spaeth <Sebastian@SSpaeth.de>'
21 from ctypes import c_int, c_char_p, c_void_p, c_uint, c_long, byref
22 from cnotmuch.globals import nmlib, STATUS, NotmuchError, Enum
23 from cnotmuch.thread import Threads
24 from cnotmuch.message import Messages, Message
25 from cnotmuch.tag import Tags
27 class Database(object):
28 """Represents a notmuch database (wraps notmuch_database_t)
30 .. note:: Do remember that as soon as we tear down this object,
31 all underlying derived objects such as queries, threads,
32 messages, tags etc will be freed by the underlying library
33 as well. Accessing these objects will lead to segfaults and
34 other unexpected behavior. See above for more details.
37 """Class attribute to cache user's default database"""
39 MODE = Enum(['READ_ONLY','READ_WRITE'])
40 """Constants: Mode in which to open the database"""
42 """notmuch_database_get_directory"""
43 _get_directory = nmlib.notmuch_database_get_directory
44 _get_directory.restype = c_void_p
46 """notmuch_database_get_path"""
47 _get_path = nmlib.notmuch_database_get_path
48 _get_path.restype = c_char_p
50 """notmuch_database_get_version"""
51 _get_version = nmlib.notmuch_database_get_version
52 _get_version.restype = c_uint
54 """notmuch_database_open"""
55 _open = nmlib.notmuch_database_open
56 _open.restype = c_void_p
58 """notmuch_database_upgrade"""
59 _upgrade = nmlib.notmuch_database_upgrade
60 _upgrade.argtypes = [c_void_p, c_void_p, c_void_p]
62 """ notmuch_database_find_message"""
63 _find_message = nmlib.notmuch_database_find_message
64 _find_message.restype = c_void_p
66 """notmuch_database_get_all_tags"""
67 _get_all_tags = nmlib.notmuch_database_get_all_tags
68 _get_all_tags.restype = c_void_p
70 """notmuch_database_create"""
71 _create = nmlib.notmuch_database_create
72 _create.restype = c_void_p
74 def __init__(self, path=None, create=False, mode= 0):
75 """If *path* is `None`, we will try to read a users notmuch
76 configuration and use his configured database. The location of the
77 configuration file can be specified through the environment variable
78 *NOTMUCH_CONFIG*, falling back to the default `~/.notmuch-config`.
80 If *create* is `True`, the database will always be created in
81 :attr:`MODE`.READ_WRITE mode. Default mode for opening is READ_ONLY.
83 :param path: Directory to open/create the database in (see
84 above for behavior if `None`)
85 :type path: `str` or `None`
86 :param create: Pass `False` to open an existing, `True` to create a new
89 :param mode: Mode to open a database in. Is always
90 :attr:`MODE`.READ_WRITE when creating a new one.
91 :type mode: :attr:`MODE`
93 :exception: :exc:`NotmuchError` in case of failure.
97 # no path specified. use a user's default database
98 if Database._std_db_path is None:
99 #the following line throws a NotmuchError if it fails
100 Database._std_db_path = self._get_user_default_db()
101 path = Database._std_db_path
104 self.open(path, mode)
108 def _verify_initialized_db(self):
109 """Raises a NotmuchError in case self._db is still None"""
111 raise NotmuchError(STATUS.NOT_INITIALIZED)
113 def create(self, path):
114 """Creates a new notmuch database
116 This function is used by __init__() and usually does not need
117 to be called directly. It wraps the underlying
118 *notmuch_database_create* function and creates a new notmuch
119 database at *path*. It will always return a database in :attr:`MODE`
120 .READ_WRITE mode as creating an empty database for
121 reading only does not make a great deal of sense.
123 :param path: A directory in which we should create the database.
126 :exception: :exc:`NotmuchError` in case of any failure
127 (after printing an error message on stderr).
129 if self._db is not None:
131 message="Cannot create db, this Database() already has an open one.")
133 res = Database._create(path, Database.MODE.READ_WRITE)
137 message="Could not create the specified database")
140 def open(self, path, mode= 0):
141 """Opens an existing database
143 This function is used by __init__() and usually does not need
144 to be called directly. It wraps the underlying
145 *notmuch_database_open* function.
147 :param status: Open the database in read-only or read-write mode
148 :type status: :attr:`MODE`
150 :exception: Raises :exc:`NotmuchError` in case
151 of any failure (after printing an error message on stderr).
154 res = Database._open(path, mode)
158 message="Could not open the specified database")
162 """Returns the file path of an open database
164 Wraps *notmuch_database_get_path*."""
165 # Raise a NotmuchError if not initialized
166 self._verify_initialized_db()
168 return Database._get_path(self._db)
170 def get_version(self):
171 """Returns the database format version
173 :returns: The database version as positive integer
174 :exception: :exc:`NotmuchError` with STATUS.NOT_INITIALIZED if
175 the database was not intitialized.
177 # Raise a NotmuchError if not initialized
178 self._verify_initialized_db()
180 return Database._get_version (self._db)
182 def needs_upgrade(self):
183 """Does this database need to be upgraded before writing to it?
185 If this function returns `True` then no functions that modify the
186 database (:meth:`add_message`,
187 :meth:`Message.add_tag`, :meth:`Directory.set_mtime`,
188 etc.) will work unless :meth:`upgrade` is called successfully first.
190 :returns: `True` or `False`
191 :exception: :exc:`NotmuchError` with STATUS.NOT_INITIALIZED if
192 the database was not intitialized.
194 # Raise a NotmuchError if not initialized
195 self._verify_initialized_db()
197 return notmuch_database_needs_upgrade(self._db)
200 """Upgrades the current database
202 After opening a database in read-write mode, the client should
203 check if an upgrade is needed (notmuch_database_needs_upgrade) and
204 if so, upgrade with this function before making any modifications.
206 NOT IMPLEMENTED: The optional progress_notify callback can be
207 used by the caller to provide progress indication to the
208 user. If non-NULL it will be called periodically with
209 'progress' as a floating-point value in the range of [0.0..1.0]
210 indicating the progress made so far in the upgrade process.
212 :TODO: catch exceptions, document return values and etc...
214 # Raise a NotmuchError if not initialized
215 self._verify_initialized_db()
217 status = Database._upgrade (self._db, None, None)
218 #TODO: catch exceptions, document return values and etc
221 def get_directory(self, path):
222 """Returns a :class:`Directory` of path,
223 (creating it if it does not exist(?))
225 .. warning:: This call needs a writeable database in
226 Database.MODE.READ_WRITE mode. The underlying library will exit the
227 program if this method is used on a read-only database!
229 :param path: A str containing the path relative to the path of database
230 (see :meth:`get_path`), or else should be an absolute path
231 with initial components that match the path of 'database'.
232 :returns: :class:`Directory` or raises an exception.
233 :exception: :exc:`NotmuchError`
235 STATUS.NOT_INITIALIZED
236 If the database was not intitialized.
239 If path is not relative database or absolute with initial
240 components same as database.
243 # Raise a NotmuchError if not initialized
244 self._verify_initialized_db()
246 # sanity checking if path is valid, and make path absolute
247 if path[0] == os.sep:
248 # we got an absolute path
249 if not path.startswith(self.get_path()):
250 # but its initial components are not equal to the db path
251 raise NotmuchError(STATUS.FILE_ERROR,
252 message="Database().get_directory() called with a wrong absolute path.")
255 #we got a relative path, make it absolute
256 abs_dirpath = os.path.abspath(os.path.join(self.get_path(),path))
258 dir_p = Database._get_directory(self._db, path);
260 # return the Directory, init it with the absolute path
261 return Directory(abs_dirpath, dir_p, self)
263 def add_message(self, filename):
264 """Adds a new message to the database
266 `filename` should be a path relative to the path of the open
267 database (see :meth:`get_path`), or else should be an absolute
268 filename with initial components that match the path of the
271 The file should be a single mail message (not a multi-message mbox)
272 that is expected to remain at its current location, since the
273 notmuch database will reference the filename, and will not copy the
274 entire contents of the file.
276 :returns: On success, we return
278 1) a :class:`Message` object that can be used for things
279 such as adding tags to the just-added message.
280 2) one of the following STATUS values:
283 Message successfully added to database.
284 STATUS.DUPLICATE_MESSAGE_ID
285 Message has the same message ID as another message already
286 in the database. The new filename was successfully added
287 to the message in the database.
289 :rtype: 2-tuple(:class:`Message`, STATUS)
291 :exception: Raises a :exc:`NotmuchError` with the following meaning.
292 If such an exception occurs, nothing was added to the database.
295 An error occurred trying to open the file, (such as
296 permission denied, or file not found, etc.).
297 STATUS.FILE_NOT_EMAIL
298 The contents of filename don't look like an email message.
299 STATUS.READ_ONLY_DATABASE
300 Database was opened in read-only mode so no message can
302 STATUS.NOT_INITIALIZED
303 The database has not been initialized.
305 # Raise a NotmuchError if not initialized
306 self._verify_initialized_db()
309 status = nmlib.notmuch_database_add_message(self._db,
313 if not status in [STATUS.SUCCESS,STATUS.DUPLICATE_MESSAGE_ID]:
314 raise NotmuchError(status)
316 #construct Message() and return
317 msg = Message(msg_p, self)
320 def remove_message(self, filename):
321 """Removes a message from the given notmuch database
323 Note that only this particular filename association is removed from
324 the database. If the same message (as determined by the message ID)
325 is still available via other filenames, then the message will
326 persist in the database for those filenames. When the last filename
327 is removed for a particular message, the database content for that
328 message will be entirely removed.
330 :returns: A STATUS value with the following meaning:
333 The last filename was removed and the message was removed
335 STATUS.DUPLICATE_MESSAGE_ID
336 This filename was removed but the message persists in the
337 database with at least one other filename.
339 :exception: Raises a :exc:`NotmuchError` with the following meaning.
340 If such an exception occurs, nothing was removed from the database.
342 STATUS.READ_ONLY_DATABASE
343 Database was opened in read-only mode so no message can be
345 STATUS.NOT_INITIALIZED
346 The database has not been initialized.
348 # Raise a NotmuchError if not initialized
349 self._verify_initialized_db()
351 return nmlib.notmuch_database_remove_message(self._db,
354 def find_message(self, msgid):
355 """Returns a :class:`Message` as identified by its message ID
357 Wraps the underlying *notmuch_database_find_message* function.
359 :param msgid: The message ID
361 :returns: :class:`Message` or `None` if no message is found or if an
362 out-of-memory situation occurs.
363 :exception: :exc:`NotmuchError` with STATUS.NOT_INITIALIZED if
364 the database was not intitialized.
366 # Raise a NotmuchError if not initialized
367 self._verify_initialized_db()
369 msg_p = Database._find_message(self._db, msgid)
372 return Message(msg_p, self)
374 def get_all_tags(self):
375 """Returns :class:`Tags` with a list of all tags found in the database
377 :returns: :class:`Tags`
378 :execption: :exc:`NotmuchError` with STATUS.NULL_POINTER on error
380 # Raise a NotmuchError if not initialized
381 self._verify_initialized_db()
383 tags_p = Database._get_all_tags (self._db)
385 raise NotmuchError(STATUS.NULL_POINTER)
386 return Tags(tags_p, self)
388 def create_query(self, querystring):
389 """Returns a :class:`Query` derived from this database
391 This is a shorthand method for doing::
394 # Automatically frees the Database() when 'q' is deleted
396 q = Database(dbpath).create_query('from:"Biene Maja"')
398 # long version, which is functionally equivalent but will keep the
399 # Database in the 'db' variable around after we delete 'q':
401 db = Database(dbpath)
402 q = Query(db,'from:"Biene Maja"')
404 This function is a python extension and not in the underlying C API.
406 # Raise a NotmuchError if not initialized
407 self._verify_initialized_db()
409 return Query(self, querystring)
412 return "'Notmuch DB " + self.get_path() + "'"
415 """Close and free the notmuch database if needed"""
416 if self._db is not None:
417 nmlib.notmuch_database_close(self._db)
419 def _get_user_default_db(self):
420 """ Reads a user's notmuch config and returns his db location
422 Throws a NotmuchError if it cannot find it"""
423 from ConfigParser import SafeConfigParser
424 config = SafeConfigParser()
425 conf_f = os.getenv('NOTMUCH_CONFIG',
426 os.path.expanduser('~/.notmuch-config'))
428 if not config.has_option('database','path'):
429 raise NotmuchError(message=
430 "No DB path specified and no user default found")
431 return config.get('database','path')
435 """Property returning a pointer to `notmuch_database_t` or `None`
437 This should normally not be needed by a user (and is not yet
438 guaranteed to remain stable in future versions).
442 #------------------------------------------------------------------------------
444 """Represents a search query on an opened :class:`Database`.
446 A query selects and filters a subset of messages from the notmuch
447 database we derive from.
449 Query() provides an instance attribute :attr:`sort`, which
450 contains the sort order (if specified via :meth:`set_sort`) or
453 Technically, it wraps the underlying *notmuch_query_t* struct.
455 .. note:: Do remember that as soon as we tear down this object,
456 all underlying derived objects such as threads,
457 messages, tags etc will be freed by the underlying library
458 as well. Accessing these objects will lead to segfaults and
459 other unexpected behavior. See above for more details.
462 SORT = Enum(['OLDEST_FIRST','NEWEST_FIRST','MESSAGE_ID'])
463 """Constants: Sort order in which to return results"""
465 """notmuch_query_create"""
466 _create = nmlib.notmuch_query_create
467 _create.restype = c_void_p
469 """notmuch_query_search_threads"""
470 _search_threads = nmlib.notmuch_query_search_threads
471 _search_threads.restype = c_void_p
473 """notmuch_query_search_messages"""
474 _search_messages = nmlib.notmuch_query_search_messages
475 _search_messages.restype = c_void_p
478 """notmuch_query_count_messages"""
479 _count_messages = nmlib.notmuch_query_count_messages
480 _count_messages.restype = c_uint
482 def __init__(self, db, querystr):
484 :param db: An open database which we derive the Query from.
485 :type db: :class:`Database`
486 :param querystr: The query string for the message.
492 self.create(db, querystr)
494 def create(self, db, querystr):
495 """Creates a new query derived from a Database
497 This function is utilized by __init__() and usually does not need to
500 :param db: Database to create the query from.
501 :type db: :class:`Database`
502 :param querystr: The query string
505 :exception: :exc:`NotmuchError`
507 * STATUS.NOT_INITIALIZED if db is not inited
508 * STATUS.NULL_POINTER if the query creation failed
512 raise NotmuchError(STATUS.NOT_INITIALIZED)
513 # create reference to parent db to keep it alive
516 # create query, return None if too little mem available
517 query_p = Query._create(db.db_p, querystr)
519 NotmuchError(STATUS.NULL_POINTER)
520 self._query = query_p
522 def set_sort(self, sort):
523 """Set the sort order future results will be delivered in
525 Wraps the underlying *notmuch_query_set_sort* function.
527 :param sort: Sort order (see :attr:`Query.SORT`)
529 :exception: :exc:`NotmuchError` STATUS.NOT_INITIALIZED if query has not
532 if self._query is None:
533 raise NotmuchError(STATUS.NOT_INITIALIZED)
536 nmlib.notmuch_query_set_sort(self._query, sort)
538 def search_threads(self):
539 """Execute a query for threads
541 Execute a query for threads, returning a :class:`Threads` iterator.
542 The returned threads are owned by the query and as such, will only be
543 valid until the Query is deleted.
545 The method sets :attr:`Message.FLAG`\.MATCH for those messages that
546 match the query. The method :meth:`Message.get_flag` allows us
547 to get the value of this flag.
549 Technically, it wraps the underlying
550 *notmuch_query_search_threads* function.
552 :returns: :class:`Threads`
553 :exception: :exc:`NotmuchError`
555 * STATUS.NOT_INITIALIZED if query is not inited
556 * STATUS.NULL_POINTER if search_threads failed
558 if self._query is None:
559 raise NotmuchError(STATUS.NOT_INITIALIZED)
561 threads_p = Query._search_threads(self._query)
563 if threads_p is None:
564 NotmuchError(STATUS.NULL_POINTER)
566 return Threads(threads_p,self)
568 def search_messages(self):
569 """Filter messages according to the query and return
570 :class:`Messages` in the defined sort order
572 Technically, it wraps the underlying
573 *notmuch_query_search_messages* function.
575 :returns: :class:`Messages`
576 :exception: :exc:`NotmuchError`
578 * STATUS.NOT_INITIALIZED if query is not inited
579 * STATUS.NULL_POINTER if search_messages failed
581 if self._query is None:
582 raise NotmuchError(STATUS.NOT_INITIALIZED)
584 msgs_p = Query._search_messages(self._query)
587 NotmuchError(STATUS.NULL_POINTER)
589 return Messages(msgs_p,self)
591 def count_messages(self):
592 """Estimate the number of messages matching the query
594 This function performs a search and returns Xapian's best
595 guess as to the number of matching messages. It is much faster
596 than performing :meth:`search_messages` and counting the
597 result with `len()` (although it always returned the same
598 result in my tests). Technically, it wraps the underlying
599 *notmuch_query_count_messages* function.
601 :returns: :class:`Messages`
602 :exception: :exc:`NotmuchError`
604 * STATUS.NOT_INITIALIZED if query is not inited
606 if self._query is None:
607 raise NotmuchError(STATUS.NOT_INITIALIZED)
609 return Query._count_messages(self._query)
612 """Close and free the Query"""
613 if self._query is not None:
614 nmlib.notmuch_query_destroy (self._query)
617 #------------------------------------------------------------------------------
618 class Directory(object):
619 """Represents a directory entry in the notmuch directory
621 Modifying attributes of this object will modify the
622 database, not the real directory attributes.
624 The Directory object is usually derived from another object
625 e.g. via :meth:`Database.get_directory`, and will automatically be
626 become invalid whenever that parent is deleted. You should
627 therefore initialized this object handing it a reference to the
628 parent, preventing the parent from automatically being garbage
632 """notmuch_directory_get_mtime"""
633 _get_mtime = nmlib.notmuch_directory_get_mtime
634 _get_mtime.restype = c_long
636 """notmuch_directory_set_mtime"""
637 _set_mtime = nmlib.notmuch_directory_set_mtime
638 _set_mtime.argtypes = [c_char_p, c_long]
640 """notmuch_directory_get_child_files"""
641 _get_child_files = nmlib.notmuch_directory_get_child_files
642 _get_child_files.restype = c_void_p
644 """notmuch_directory_get_child_directories"""
645 _get_child_directories = nmlib.notmuch_directory_get_child_directories
646 _get_child_directories.restype = c_void_p
648 def _verify_dir_initialized(self):
649 """Raises a NotmuchError(STATUS.NOT_INITIALIZED) if the dir_p is None"""
650 if self._dir_p is None:
651 raise NotmuchError(STATUS.NOT_INITIALIZED)
653 def __init__(self, path, dir_p, parent):
655 :param path: The absolute path of the directory object.
656 :param dir_p: The pointer to an internal notmuch_directory_t object.
657 :param parent: The object this Directory is derived from
658 (usually a :class:`Database`). We do not directly use
659 this, but store a reference to it as long as
660 this Directory object lives. This keeps the
665 self._parent = parent
668 def set_mtime (self, mtime):
669 """Sets the mtime value of this directory in the database
671 The intention is for the caller to use the mtime to allow efficient
672 identification of new messages to be added to the database. The
673 recommended usage is as follows:
675 * Read the mtime of a directory from the filesystem
677 * Call :meth:`Database.add_message` for all mail files in
680 * Call notmuch_directory_set_mtime with the mtime read from the
681 filesystem. Then, when wanting to check for updates to the
682 directory in the future, the client can call :meth:`get_mtime`
683 and know that it only needs to add files if the mtime of the
684 directory and files are newer than the stored timestamp.
686 .. note:: :meth:`get_mtime` function does not allow the caller
687 to distinguish a timestamp of 0 from a non-existent
688 timestamp. So don't store a timestamp of 0 unless you are
689 comfortable with that.
691 :param mtime: A (time_t) timestamp
692 :returns: Nothing on success, raising an exception on failure.
693 :exception: :exc:`NotmuchError`:
695 STATUS.XAPIAN_EXCEPTION
696 A Xapian exception occurred, mtime not stored.
697 STATUS.READ_ONLY_DATABASE
698 Database was opened in read-only mode so directory
699 mtime cannot be modified.
700 STATUS.NOT_INITIALIZED
701 The directory has not been initialized
703 #Raise a NotmuchError(STATUS.NOT_INITIALIZED) if the dir_p is None
704 self._verify_dir_initialized()
706 #TODO: make sure, we convert the mtime parameter to a 'c_long'
707 status = Directory._set_mtime(self._dir_p, mtime)
710 if status == STATUS.SUCCESS:
712 #fail with Exception otherwise
713 raise NotmuchError(status)
715 def get_mtime (self):
716 """Gets the mtime value of this directory in the database
718 Retrieves a previously stored mtime for this directory.
720 :param mtime: A (time_t) timestamp
721 :returns: Nothing on success, raising an exception on failure.
722 :exception: :exc:`NotmuchError`:
724 STATUS.NOT_INITIALIZED
725 The directory has not been initialized
727 #Raise a NotmuchError(STATUS.NOT_INITIALIZED) if self.dir_p is None
728 self._verify_dir_initialized()
730 return Directory._get_mtime (self._dir_p)
732 # Make mtime attribute a property of Directory()
733 mtime = property(get_mtime, set_mtime, doc="""Property that allows getting
734 and setting of the Directory *mtime* (read-write)
736 See :meth:`get_mtime` and :meth:`set_mtime` for usage and
737 possible exceptions.""")
739 def get_child_files(self):
740 """Gets a Filenames iterator listing all the filenames of
741 messages in the database within the given directory.
743 The returned filenames will be the basename-entries only (not
746 #Raise a NotmuchError(STATUS.NOT_INITIALIZED) if self._dir_p is None
747 self._verify_dir_initialized()
749 files_p = Directory._get_child_files(self._dir_p)
750 return Filenames(files_p, self)
752 def get_child_directories(self):
753 """Gets a :class:`Filenames` iterator listing all the filenames of
754 sub-directories in the database within the given directory
756 The returned filenames will be the basename-entries only (not
759 #Raise a NotmuchError(STATUS.NOT_INITIALIZED) if self._dir_p is None
760 self._verify_dir_initialized()
762 files_p = Directory._get_child_directories(self._dir_p)
763 return Filenames(files_p, self)
767 """Returns the absolute path of this Directory (read-only)"""
771 """Object representation"""
772 return "<cnotmuch Directory object '%s'>" % self._path
775 """Close and free the Directory"""
776 if self._dir_p is not None:
777 nmlib.notmuch_directory_destroy(self._dir_p)
779 #------------------------------------------------------------------------------
780 class Filenames(object):
781 """An iterator over File- or Directory names that are stored in the database
784 #notmuch_filenames_get
785 _get = nmlib.notmuch_filenames_get
786 _get.restype = c_char_p
788 def __init__(self, files_p, parent):
790 :param files_p: The pointer to an internal notmuch_filenames_t object.
791 :param parent: The object this Directory is derived from
792 (usually a Directory()). We do not directly use
793 this, but store a reference to it as long as
794 this Directory object lives. This keeps the
797 self._files_p = files_p
798 self._parent = parent
801 """ Make Filenames an iterator """
805 if self._files_p is None:
806 raise NotmuchError(STATUS.NOT_INITIALIZED)
808 if not nmlib.notmuch_filenames_valid(self._files_p):
812 file = Filenames._get (self._files_p)
813 nmlib.notmuch_filenames_move_to_next(self._files_p)
817 """len(:class:`Filenames`) returns the number of contained files
819 .. note:: As this iterates over the files, we will not be able to
820 iterate over them again! So this will fail::
823 files = Database().get_directory('').get_child_files()
824 if len(files) > 0: #this 'exhausts' msgs
825 # next line raises NotmuchError(STATUS.NOT_INITIALIZED)!!!
826 for file in files: print file
828 if self._files_p is None:
829 raise NotmuchError(STATUS.NOT_INITIALIZED)
832 while nmlib.notmuch_filenames_valid(self._files_p):
833 nmlib.notmuch_filenames_move_to_next(self._files_p)
839 """Close and free Filenames"""
840 if self._files_p is not None:
841 nmlib.notmuch_filenames_destroy(self._files_p)