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"""Module with many useful complex databases with different useful combinations of primary implementations"""

from py.complex import PurePartialGitDB

from cmd.complex import CmdPartialGitDB

from compat import RepoCompatibilityInterface

__all__ = ['CmdGitDB', 'PureGitDB', 'CmdCompatibilityGitDB', 'PureCompatibilityGitDB']

class CmdGitDB(CmdPartialGitDB, PurePartialGitDB):

"""A database which uses primarily the git command implementation, but falls back

to pure python where it is more feasible

:note: To assure consistent behaviour across implementations, when calling the

``stream()`` method a cache is created. This makes this implementation a bad

choice when reading big files as these are streamed from memory in all cases."""

class CmdCompatibilityGitDB(RepoCompatibilityInterface, CmdGitDB):

"""A database which fills in its missing implementation using the pure python

implementation"""

pass

class PureGitDB(PurePartialGitDB, CmdPartialGitDB):

"""A repository which uses the pure implementation primarily, but falls back

on using the git command for high-level functionality"""

class PureCompatibilityGitDB(RepoCompatibilityInterface, PureGitDB):

"""Repository which uses the pure implementation primarily, but falls back

to the git command implementation. Please note that the CmdGitDB does it

the opposite way around."""