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# This module is part of GitDB and is released under

# the New BSD License: https://opensource.org/license/bsd-3-clause/

from gitdb.db.base import (

CompoundDB,

ObjectDBW,

FileDBBase

)

from gitdb.db.loose import LooseObjectDB

from gitdb.db.pack import PackedDB

from gitdb.db.ref import ReferenceDB

from gitdb.exc import InvalidDBRoot

import os

__all__ = ('GitDB', )

class GitDB(FileDBBase, ObjectDBW, CompoundDB):

"""A git-style object database, which contains all objects in the 'objects'

subdirectory

``IMPORTANT``: The usage of this implementation is highly discouraged as it fails to release file-handles.

This can be a problem with long-running processes and/or big repositories.

"""

# Configuration

PackDBCls = PackedDB

LooseDBCls = LooseObjectDB

ReferenceDBCls = ReferenceDB

# Directories

packs_dir = 'pack'

loose_dir = ''

alternates_dir = os.path.join('info', 'alternates')

def __init__(self, root_path):

"""Initialize ourselves on a git objects directory"""

super().__init__(root_path)

def _set_cache_(self, attr):

if attr == '_dbs' or attr == '_loose_db':

self._dbs = list()

loose_db = None

for subpath, dbcls in ((self.packs_dir, self.PackDBCls),

(self.loose_dir, self.LooseDBCls),

(self.alternates_dir, self.ReferenceDBCls)):

path = self.db_path(subpath)

if os.path.exists(path):

self._dbs.append(dbcls(path))

if dbcls is self.LooseDBCls:

loose_db = self._dbs[-1]

# END remember loose db

# END check path exists

# END for each db type

# should have at least one subdb

if not self._dbs:

raise InvalidDBRoot(self.root_path())

# END handle error

# we the first one should have the store method

assert loose_db is not None and hasattr(loose_db, 'store'), "First database needs store functionality"

# finally set the value

self._loose_db = loose_db

else:

super()._set_cache_(attr)

# END handle attrs

#{ ObjectDBW interface

def store(self, istream):

return self._loose_db.store(istream)

def ostream(self):

return self._loose_db.ostream()

def set_ostream(self, ostream):

return self._loose_db.set_ostream(ostream)

#} END objectdbw interface

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