You should have received a copy of the GNU General Public License
along with notmuch. If not, see <http://www.gnu.org/licenses/>.
-Copyright 2010 Sebastian Spaeth <Sebastian@SSpaeth.de>'
+Copyright 2010 Sebastian Spaeth <Sebastian@SSpaeth.de>
"""
import os
import codecs
-from ctypes import c_char_p, c_void_p, c_uint, c_long, byref, POINTER
+from ctypes import c_char_p, c_void_p, c_uint, byref, POINTER
from notmuch.globals import (
nmlib,
- STATUS,
- FileError,
- NotmuchError,
- NullPointerError,
- NotInitializedError,
Enum,
_str,
NotmuchDatabaseP,
NotmuchDirectoryP,
NotmuchMessageP,
NotmuchTagsP,
- NotmuchFilenamesP
+)
+from .errors import (
+ STATUS,
+ FileError,
+ NotmuchError,
+ NullPointerError,
+ NotInitializedError,
+ ReadOnlyDatabaseError,
)
from notmuch.message import Message
from notmuch.tag import Tags
from .query import Query
+from .directory import Directory
class Database(object):
"""The :class:`Database` is the highest-level object that notmuch
:class:`Database` objects implement the context manager protocol
so you can use the :keyword:`with` statement to ensure that the
- database is properly closed.
+ database is properly closed. See :meth:`close` for more
+ information.
.. note::
Any function in this class can and will throw an
:exc:`NotInitializedError` if the database was not intitialized
properly.
-
- .. note::
-
- Do remember that as soon as we tear down (e.g. via `del db`) this
- object, all underlying derived objects such as queries, threads,
- messages, tags etc will be freed by the underlying library as well.
- Accessing these objects will lead to segfaults and other unexpected
- behavior. See above for more details.
"""
_std_db_path = None
"""Class attribute to cache user's default database"""
"""notmuch_database_get_directory"""
_get_directory = nmlib.notmuch_database_get_directory
- _get_directory.argtypes = [NotmuchDatabaseP, c_char_p]
- _get_directory.restype = NotmuchDirectoryP
+ _get_directory.argtypes = [NotmuchDatabaseP, c_char_p, POINTER(NotmuchDirectoryP)]
+ _get_directory.restype = c_uint
"""notmuch_database_get_path"""
_get_path = nmlib.notmuch_database_get_path
"""notmuch_database_open"""
_open = nmlib.notmuch_database_open
- _open.argtypes = [c_char_p, c_uint]
- _open.restype = NotmuchDatabaseP
+ _open.argtypes = [c_char_p, c_uint, POINTER(NotmuchDatabaseP)]
+ _open.restype = c_uint
"""notmuch_database_upgrade"""
_upgrade = nmlib.notmuch_database_upgrade
"""notmuch_database_create"""
_create = nmlib.notmuch_database_create
- _create.argtypes = [c_char_p]
- _create.restype = NotmuchDatabaseP
+ _create.argtypes = [c_char_p, POINTER(NotmuchDatabaseP)]
+ _create.restype = c_uint
- def __init__(self, path=None, create=False, mode=0):
+ def __init__(self, path = None, create = False,
+ mode = MODE.READ_ONLY):
"""If *path* is `None`, we will try to read a users notmuch
configuration and use his configured database. The location of the
configuration file can be specified through the environment variable
:param mode: Mode to open a database in. Is always
:attr:`MODE`.READ_WRITE when creating a new one.
:type mode: :attr:`MODE`
- :exception: :exc:`NotmuchError` or derived exception in case of
+ :raises: :exc:`NotmuchError` or derived exception in case of
failure.
"""
self._db = None
+ self.mode = mode
if path is None:
# no path specified. use a user's default database
if Database._std_db_path is None:
else:
self.create(path)
+ _destroy = nmlib.notmuch_database_destroy
+ _destroy.argtypes = [NotmuchDatabaseP]
+ _destroy.restype = None
+
def __del__(self):
- self.close()
+ if self._db:
+ self._destroy(self._db)
def _assert_db_is_initialized(self):
"""Raises :exc:`NotInitializedError` if self._db is `None`"""
:param path: A directory in which we should create the database.
:type path: str
- :returns: Nothing
- :exception: :exc:`NotmuchError` in case of any failure
+ :raises: :exc:`NotmuchError` in case of any failure
(possibly after printing an error message on stderr).
"""
- if self._db is not None:
+ if self._db:
raise NotmuchError(message="Cannot create db, this Database() "
"already has an open one.")
- res = Database._create(_str(path), Database.MODE.READ_WRITE)
+ db = NotmuchDatabaseP()
+ status = Database._create(_str(path), Database.MODE.READ_WRITE, byref(db))
- if not res:
- raise NotmuchError(
- message="Could not create the specified database")
- self._db = res
+ if status != STATUS.SUCCESS:
+ raise NotmuchError(status)
+ self._db = db
+ return status
def open(self, path, mode=0):
"""Opens an existing database
:param status: Open the database in read-only or read-write mode
:type status: :attr:`MODE`
- :returns: Nothing
- :exception: Raises :exc:`NotmuchError` in case of any failure
+ :raises: Raises :exc:`NotmuchError` in case of any failure
(possibly after printing an error message on stderr).
"""
- res = Database._open(_str(path), mode)
+ db = NotmuchDatabaseP()
+ status = Database._open(_str(path), mode, byref(db))
- if not res:
- raise NotmuchError(message="Could not open the specified database")
- self._db = res
+ if status != STATUS.SUCCESS:
+ raise NotmuchError(status)
+ self._db = db
+ return status
_close = nmlib.notmuch_database_close
_close.argtypes = [NotmuchDatabaseP]
_close.restype = None
def close(self):
- """Close and free the notmuch database if needed"""
- if self._db is not None:
+ '''
+ Closes the notmuch database.
+
+ .. warning::
+
+ This function closes the notmuch database. From that point
+ on every method invoked on any object ever derived from
+ the closed database may cease to function and raise a
+ NotmuchError.
+ '''
+ if self._db:
self._close(self._db)
- self._db = None
def __enter__(self):
'''
neither begin nor end necessarily flush modifications to disk.
:returns: :attr:`STATUS`.SUCCESS or raises
- :exception: :exc:`NotmuchError`: :attr:`STATUS`.XAPIAN_EXCEPTION
+ :raises: :exc:`NotmuchError`: :attr:`STATUS`.XAPIAN_EXCEPTION
Xapian exception occurred; atomic section not entered.
*Added in notmuch 0.9*"""
:returns: :attr:`STATUS`.SUCCESS or raises
- :exception:
+ :raises:
:exc:`NotmuchError`:
:attr:`STATUS`.XAPIAN_EXCEPTION
A Xapian exception occurred; atomic section not
def get_directory(self, path):
"""Returns a :class:`Directory` of path,
- (creating it if it does not exist(?))
-
- .. warning::
-
- This call needs a writeable database in
- :attr:`Database.MODE`.READ_WRITE mode. The underlying library will
- exit the program if this method is used on a read-only database!
:param path: An unicode string containing the path relative to the path
of database (see :meth:`get_path`), or else should be an absolute
path with initial components that match the path of 'database'.
:returns: :class:`Directory` or raises an exception.
- :exception:
- :exc:`NotmuchError` with :attr:`STATUS`.FILE_ERROR
- If path is not relative database or absolute with initial
- components same as database.
+ :raises: :exc:`FileError` if path is not relative database or absolute
+ with initial components same as database.
"""
self._assert_db_is_initialized()
+
# sanity checking if path is valid, and make path absolute
- if path[0] == os.sep:
+ if path and path[0] == os.sep:
# we got an absolute path
if not path.startswith(self.get_path()):
# but its initial components are not equal to the db path
#we got a relative path, make it absolute
abs_dirpath = os.path.abspath(os.path.join(self.get_path(), path))
- dir_p = Database._get_directory(self._db, _str(path))
+ dir_p = NotmuchDirectoryP()
+ status = Database._get_directory(self._db, _str(path), byref(dir_p))
+
+ if status != STATUS.SUCCESS:
+ raise NotmuchError(status)
+ if not dir_p:
+ return None
# return the Directory, init it with the absolute path
- return Directory(_str(abs_dirpath), dir_p, self)
+ return Directory(abs_dirpath, dir_p, self)
_add_message = nmlib.notmuch_database_add_message
_add_message.argtypes = [NotmuchDatabaseP, c_char_p,
:rtype: 2-tuple(:class:`Message`, :attr:`STATUS`)
- :exception: Raises a :exc:`NotmuchError` with the following meaning.
+ :raises: Raises a :exc:`NotmuchError` with the following meaning.
If such an exception occurs, nothing was added to the database.
:attr:`STATUS`.FILE_ERROR
This filename was removed but the message persists in the
database with at least one other filename.
- :exception: Raises a :exc:`NotmuchError` with the following meaning.
+ :raises: Raises a :exc:`NotmuchError` with the following meaning.
If such an exception occurs, nothing was removed from the
database.
:param msgid: The message ID
:type msgid: unicode or str
:returns: :class:`Message` or `None` if no message is found.
- :exception:
+ :raises:
:exc:`OutOfMemoryError`
If an Out-of-memory occured while constructing the message.
:exc:`XapianError`
def find_message_by_filename(self, filename):
"""Find a message with the given filename
- .. warning::
-
- This call needs a writeable database in
- :attr:`Database.MODE`.READ_WRITE mode. The underlying library will
- exit the program if this method is used on a read-only database!
-
:returns: If the database contains a message with the given
filename, then a class:`Message:` is returned. This
function returns None if no message is found with the given
filename.
- :exception:
- :exc:`OutOfMemoryError`
- If an Out-of-memory occured while constructing the message.
- :exc:`XapianError`
- In case of a Xapian Exception. These exceptions
- include "Database modified" situations, e.g. when the
- notmuch database has been modified by another program
- in the meantime. In this case, you should close and
- reopen the database and retry.
- :exc:`NotInitializedError` if
- the database was not intitialized.
+ :raises: :exc:`OutOfMemoryError` if an Out-of-memory occured while
+ constructing the message.
+ :raises: :exc:`XapianError` in case of a Xapian Exception.
+ These exceptions include "Database modified"
+ situations, e.g. when the notmuch database has been
+ modified by another program in the meantime. In this
+ case, you should close and reopen the database and
+ retry.
+ :raises: :exc:`NotInitializedError` if the database was not
+ intitialized.
+ :raises: :exc:`ReadOnlyDatabaseError` if the database has not been
+ opened in read-write mode
*Added in notmuch 0.9*"""
self._assert_db_is_initialized()
+
+ # work around libnotmuch calling exit(3), see
+ # id:20120221002921.8534.57091@thinkbox.jade-hamburg.de
+ # TODO: remove once this issue is resolved
+ if self.mode != Database.MODE.READ_WRITE:
+ raise ReadOnlyDatabaseError('The database has to be opened in '
+ 'read-write mode for get_directory')
+
msg_p = NotmuchMessageP()
status = Database._find_message_by_filename(self._db, _str(filename),
byref(msg_p))
guaranteed to remain stable in future versions).
"""
return self._db
-
-
-class Directory(object):
- """Represents a directory entry in the notmuch directory
-
- Modifying attributes of this object will modify the
- database, not the real directory attributes.
-
- The Directory object is usually derived from another object
- e.g. via :meth:`Database.get_directory`, and will automatically be
- become invalid whenever that parent is deleted. You should
- therefore initialized this object handing it a reference to the
- parent, preventing the parent from automatically being garbage
- collected.
- """
-
- """notmuch_directory_get_mtime"""
- _get_mtime = nmlib.notmuch_directory_get_mtime
- _get_mtime.argtypes = [NotmuchDirectoryP]
- _get_mtime.restype = c_long
-
- """notmuch_directory_set_mtime"""
- _set_mtime = nmlib.notmuch_directory_set_mtime
- _set_mtime.argtypes = [NotmuchDirectoryP, c_long]
- _set_mtime.restype = c_uint
-
- """notmuch_directory_get_child_files"""
- _get_child_files = nmlib.notmuch_directory_get_child_files
- _get_child_files.argtypes = [NotmuchDirectoryP]
- _get_child_files.restype = NotmuchFilenamesP
-
- """notmuch_directory_get_child_directories"""
- _get_child_directories = nmlib.notmuch_directory_get_child_directories
- _get_child_directories.argtypes = [NotmuchDirectoryP]
- _get_child_directories.restype = NotmuchFilenamesP
-
- def _assert_dir_is_initialized(self):
- """Raises a NotmuchError(:attr:`STATUS`.NOT_INITIALIZED)
- if dir_p is None"""
- if not self._dir_p:
- raise NotInitializedError()
-
- def __init__(self, path, dir_p, parent):
- """
- :param path: The absolute path of the directory object as unicode.
- :param dir_p: The pointer to an internal notmuch_directory_t object.
- :param parent: The object this Directory is derived from
- (usually a :class:`Database`). We do not directly use
- this, but store a reference to it as long as
- this Directory object lives. This keeps the
- parent object alive.
- """
- assert isinstance(path, unicode), "Path needs to be an UNICODE object"
- self._path = path
- self._dir_p = dir_p
- self._parent = parent
-
- def set_mtime(self, mtime):
- """Sets the mtime value of this directory in the database
-
- The intention is for the caller to use the mtime to allow efficient
- identification of new messages to be added to the database. The
- recommended usage is as follows:
-
- * Read the mtime of a directory from the filesystem
-
- * Call :meth:`Database.add_message` for all mail files in
- the directory
-
- * Call notmuch_directory_set_mtime with the mtime read from the
- filesystem. Then, when wanting to check for updates to the
- directory in the future, the client can call :meth:`get_mtime`
- and know that it only needs to add files if the mtime of the
- directory and files are newer than the stored timestamp.
-
- .. note::
-
- :meth:`get_mtime` function does not allow the caller to
- distinguish a timestamp of 0 from a non-existent timestamp. So
- don't store a timestamp of 0 unless you are comfortable with
- that.
-
- :param mtime: A (time_t) timestamp
- :returns: Nothing on success, raising an exception on failure.
- :exception: :exc:`NotmuchError`:
-
- :attr:`STATUS`.XAPIAN_EXCEPTION
- A Xapian exception occurred, mtime not stored.
- :attr:`STATUS`.READ_ONLY_DATABASE
- Database was opened in read-only mode so directory
- mtime cannot be modified.
- :attr:`STATUS`.NOT_INITIALIZED
- The directory has not been initialized
- """
- self._assert_dir_is_initialized()
- #TODO: make sure, we convert the mtime parameter to a 'c_long'
- status = Directory._set_mtime(self._dir_p, mtime)
-
- #return on success
- if status == STATUS.SUCCESS:
- return
- #fail with Exception otherwise
- raise NotmuchError(status)
-
- def get_mtime(self):
- """Gets the mtime value of this directory in the database
-
- Retrieves a previously stored mtime for this directory.
-
- :param mtime: A (time_t) timestamp
- :returns: Nothing on success, raising an exception on failure.
- :exception: :exc:`NotmuchError`:
-
- :attr:`STATUS`.NOT_INITIALIZED
- The directory has not been initialized
- """
- self._assert_dir_is_initialized()
- return Directory._get_mtime(self._dir_p)
-
- # Make mtime attribute a property of Directory()
- mtime = property(get_mtime, set_mtime, doc="""Property that allows getting
- and setting of the Directory *mtime* (read-write)
-
- See :meth:`get_mtime` and :meth:`set_mtime` for usage and
- possible exceptions.""")
-
- def get_child_files(self):
- """Gets a Filenames iterator listing all the filenames of
- messages in the database within the given directory.
-
- The returned filenames will be the basename-entries only (not
- complete paths.
- """
- self._assert_dir_is_initialized()
- files_p = Directory._get_child_files(self._dir_p)
- return Filenames(files_p, self)
-
- def get_child_directories(self):
- """Gets a :class:`Filenames` iterator listing all the filenames of
- sub-directories in the database within the given directory
-
- The returned filenames will be the basename-entries only (not
- complete paths.
- """
- self._assert_dir_is_initialized()
- files_p = Directory._get_child_directories(self._dir_p)
- return Filenames(files_p, self)
-
- @property
- def path(self):
- """Returns the absolute path of this Directory (read-only)"""
- return self._path
-
- def __repr__(self):
- """Object representation"""
- return "<notmuch Directory object '%s'>" % self._path
-
- _destroy = nmlib.notmuch_directory_destroy
- _destroy.argtypes = [NotmuchDirectoryP]
- _destroy.argtypes = None
-
- def __del__(self):
- """Close and free the Directory"""
- if self._dir_p is not None:
- self._destroy(self._dir_p)
-
-
-class Filenames(object):
- """An iterator over File- or Directory names stored in the database"""
-
- #notmuch_filenames_get
- _get = nmlib.notmuch_filenames_get
- _get.argtypes = [NotmuchFilenamesP]
- _get.restype = c_char_p
-
- def __init__(self, files_p, parent):
- """
- :param files_p: The pointer to an internal notmuch_filenames_t object.
- :param parent: The object this Directory is derived from
- (usually a Directory()). We do not directly use
- this, but store a reference to it as long as
- this Directory object lives. This keeps the
- parent object alive.
- """
- self._files_p = files_p
- self._parent = parent
-
- def __iter__(self):
- """ Make Filenames an iterator """
- return self
-
- _valid = nmlib.notmuch_filenames_valid
- _valid.argtypes = [NotmuchFilenamesP]
- _valid.restype = bool
-
- _move_to_next = nmlib.notmuch_filenames_move_to_next
- _move_to_next.argtypes = [NotmuchFilenamesP]
- _move_to_next.restype = None
-
- def __next__(self):
- if not self._files_p:
- raise NotInitializedError()
-
- if not self._valid(self._files_p):
- self._files_p = None
- raise StopIteration
-
- file_ = Filenames._get(self._files_p)
- self._move_to_next(self._files_p)
- return file_.decode('utf-8', 'ignore')
- next = __next__ # python2.x iterator protocol compatibility
-
- def __len__(self):
- """len(:class:`Filenames`) returns the number of contained files
-
- .. note::
-
- As this iterates over the files, we will not be able to
- iterate over them again! So this will fail::
-
- #THIS FAILS
- files = Database().get_directory('').get_child_files()
- if len(files) > 0: # this 'exhausts' msgs
- # next line raises
- # NotmuchError(:attr:`STATUS`.NOT_INITIALIZED)
- for file in files: print file
- """
- if not self._files_p:
- raise NotInitializedError()
-
- i = 0
- while self._valid(self._files_p):
- self._move_to_next(self._files_p)
- i += 1
- self._files_p = None
- return i
-
- _destroy = nmlib.notmuch_filenames_destroy
- _destroy.argtypes = [NotmuchFilenamesP]
- _destroy.restype = None
-
- def __del__(self):
- """Close and free Filenames"""
- if self._files_p is not None:
- self._destroy(self._files_p)
projects / notmuch / blobdiff