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"""The core state needed to make use of bzr is managed here."""
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from __future__ import absolute_import
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from .lazy_import import lazy_import
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lazy_import(globals(), """
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class BzrLibraryState(object):
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"""The state about how breezy has been configured.
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"""The state about how bzrlib has been configured.
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This is the core state needed to make use of bzr. The current instance is
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currently always exposed as breezy._global_state, but we desired to move
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currently always exposed as bzrlib.global_state, but we desired to move
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to a point where no global state is needed at all.
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:ivar exit_stack: An ExitStack which can be used for cleanups that
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should occur when the use of breezy is completed. This is initialised
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:ivar saved_state: The bzrlib.global_state at the time __enter__ was
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:ivar cleanups: An ObjectWithCleanups which can be used for cleanups that
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should occur when the use of bzrlib is completed. This is initialised
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in __enter__ and executed in __exit__.
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def __init__(self, ui, trace):
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"""Create library start for normal use of breezy.
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"""Create library start for normal use of bzrlib.
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Most applications that embed breezy, including bzr itself, should just
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call breezy.initialize(), but it is possible to use the state class
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Most applications that embed bzrlib, including bzr itself, should just
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call bzrlib.initialize(), but it is possible to use the state class
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directly. The initialize() function provides sensible defaults for a
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CLI program, such as a text UI factory.
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global variables in use by bzr are set, and they are cleared on
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:param ui: A breezy.ui.ui_factory to use.
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:param trace: A breezy.trace.Config context manager to use, perhaps
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breezy.trace.DefaultConfig.
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:param ui: A bzrlib.ui.ui_factory to use.
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:param trace: A bzrlib.trace.Config context manager to use, perhaps
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bzrlib.trace.DefaultConfig.
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self._trace = trace
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# There is no overrides by default, they are set later when the command
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# arguments are parsed.
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self.cmdline_overrides = config.CommandLineStore()
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# No config stores are cached to start with
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self.config_stores = {} # By url
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def __enter__(self):
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return self # This is bound to the 'as' clause in a with statement.
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"""Do all initialization."""
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# NB: This function tweaks so much global state it's hard to test it in
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# isolation within the same interpreter. It's not reached on normal
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# in-process run_bzr calls. If it's broken, we expect that
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# TestRunBzrSubprocess may fail.
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self.exit_stack = cleanup.ExitStack()
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if breezy.version_info[3] == 'final':
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self.exit_stack.callback(
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symbol_versioning.suppress_deprecation_warnings(override=True))
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if bzrlib.version_info[3] == 'final':
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from bzrlib.symbol_versioning import suppress_deprecation_warnings
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warning_cleanup = suppress_deprecation_warnings(override=True)
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warning_cleanup = None
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self.cleanups = bzrlib.cleanup.ObjectWithCleanups()
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self.cleanups.add_cleanup(warning_cleanup)
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self._trace.__enter__()
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self._orig_ui = breezy.ui.ui_factory
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if self._ui is not None:
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breezy.ui.ui_factory = self._ui
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self._orig_ui = bzrlib.ui.ui_factory
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bzrlib.ui.ui_factory = self._ui
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if breezy._global_state is not None:
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raise RuntimeError("Breezy already initialized")
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breezy._global_state = self
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self.saved_state = bzrlib.global_state
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bzrlib.global_state = self
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return self # This is bound to the 'as' clause in a with statement.
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def __exit__(self, exc_type, exc_val, exc_tb):
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# Save config changes
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for k, store in self.config_stores.items():
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self.exit_stack.close()
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trace._flush_stdout_stderr()
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osutils.report_extension_load_failures()
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if self._ui is not None:
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self._ui.__exit__(None, None, None)
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self.cleanups.cleanup_now()
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bzrlib.trace._flush_stdout_stderr()
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bzrlib.trace._flush_trace()
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bzrlib.osutils.report_extension_load_failures()
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self._ui.__exit__(None, None, None)
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self._trace.__exit__(None, None, None)
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ui.ui_factory = self._orig_ui
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breezy._global_state = None
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return False # propogate exceptions.
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bzrlib.ui.ui_factory = self._orig_ui
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global_state = self.saved_state
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return False # propogate exceptions.