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Developer documentation is available at
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https://www.breezy-vcs.org/developers/.
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Some particularly interesting things in breezy are:
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* breezy.initialize -- setup the library for use
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* breezy.plugin.load_plugins -- load all installed plugins
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* breezy.branch.Branch.open -- open a branch
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* breezy.workingtree.WorkingTree.open -- open a working tree
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http://doc.bazaar.canonical.com/bzr.dev/developers/
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The project website is at http://bazaar.canonical.com/
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Some particularly interesting things in bzrlib are:
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* bzrlib.initialize -- setup the library for use
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* bzrlib.plugin.load_plugins -- load all installed plugins
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* bzrlib.branch.Branch.open -- open a branch
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* bzrlib.workingtree.WorkingTree.open -- open a working tree
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We hope you enjoy this library.
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# Keep track of when breezy was first imported, so that we can give rough
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# timestamps relative to program start in the log file kept by breezy.trace.
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# Keep track of when bzrlib was first imported, so that we can give rough
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# timestamps relative to program start in the log file kept by bzrlib.trace.
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_start_time = time.time()
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"Copyright 2005-2012 Canonical Ltd.\n"
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"Copyright 2017-2020 Breezy developers"
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IGNORE_FILENAME = ".bzrignore"
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__copyright__ = "Copyright 2005-2010 Canonical Ltd."
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# same format as sys.version_info: "A tuple containing the five components of
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# the version number: major, minor, micro, releaselevel, and serial. All
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This also checks that the version is reasonable: the sub-release must be
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zero for final releases.
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>>> print(_format_version_tuple((1, 0, 0, 'final', 0)))
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>>> print _format_version_tuple((1, 0, 0, 'final', 0))
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>>> print(_format_version_tuple((1, 2, 0, 'dev', 0)))
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>>> print _format_version_tuple((1, 2, 0, 'dev', 0))
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>>> print(_format_version_tuple((1, 2, 0, 'dev', 1)))
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>>> print bzrlib._format_version_tuple((1, 2, 0, 'dev', 1))
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>>> print(_format_version_tuple((1, 1, 1, 'candidate', 2)))
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>>> print _format_version_tuple((1, 1, 1, 'candidate', 2))
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>>> print(_format_version_tuple((2, 1, 0, 'beta', 1)))
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>>> print bzrlib._format_version_tuple((2, 1, 0, 'beta', 1))
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>>> print(_format_version_tuple((1, 4, 0)))
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>>> print _format_version_tuple((1, 4, 0))
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>>> print(_format_version_tuple((1, 4)))
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>>> print _format_version_tuple((1, 4))
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>>> print(_format_version_tuple((2, 1, 0, 'final', 42)))
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>>> print(_format_version_tuple((1, 4, 0, 'wibble', 0)))
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>>> print bzrlib._format_version_tuple((2, 1, 0, 'final', 1))
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Traceback (most recent call last):
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ValueError: version_info (2, 1, 0, 'final', 1) not valid
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>>> print _format_version_tuple((1, 4, 0, 'wibble', 0))
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Traceback (most recent call last):
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ValueError: version_info (1, 4, 0, 'wibble', 0) not valid
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if len(version_info) == 2:
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main_version = '%d.%d' % version_info[:2]
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elif release_type == 'candidate':
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sub_string = 'rc' + str(sub)
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return '.'.join(map(str, version_info))
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raise ValueError("version_info %r not valid" % (version_info,))
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return main_version + sub_string
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# lazy_regex import must be done after _format_version_tuple definition
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# to avoid "no attribute '_format_version_tuple'" error when using
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# deprecated_function in the lazy_regex module.
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if getattr(sys, '_bzr_lazy_regex', False):
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# The 'bzr' executable sets _bzr_lazy_regex. We install the lazy regex
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# hack as soon as possible so that as much of the standard library can
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# benefit, including the 'string' module.
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del sys._bzr_lazy_regex
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import bzrlib.lazy_regex
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bzrlib.lazy_regex.install_lazy_compile()
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__version__ = _format_version_tuple(version_info)
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version_string = __version__
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def _patch_filesystem_default_encoding(new_enc):
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"""Change the Python process global encoding for filesystem names
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The effect is to change how open() and other builtin functions handle
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unicode filenames on posix systems. This should only be done near startup.
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The new encoding string passed to this function must survive until process
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termination, otherwise the interpreter may access uninitialized memory.
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The use of intern() may defer breakage is but is not enough, the string
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object should be secure against module reloading and during teardown.
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pythonapi = getattr(ctypes, 'pythonapi', None)
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if pythonapi is not None:
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old_ptr = ctypes.c_void_p.in_dll(pythonapi,
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"Py_FileSystemDefaultEncoding")
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has_enc = ctypes.c_int.in_dll(pythonapi,
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"Py_HasFileSystemDefaultEncoding")
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as_utf8 = ctypes.PYFUNCTYPE(
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ctypes.POINTER(ctypes.c_char), ctypes.py_object)(
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("PyUnicode_AsUTF8", pythonapi))
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except (ImportError, ValueError):
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return # No ctypes or not CPython implementation, do nothing
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new_enc = sys.intern(new_enc)
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enc_ptr = as_utf8(new_enc)
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old_ptr.value = ctypes.cast(enc_ptr, ctypes.c_void_p).value
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if sys.getfilesystemencoding() != new_enc:
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raise RuntimeError("Failed to change the filesystem default encoding")
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# When running under the brz script, override bad filesystem default encoding.
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# This is not safe to do for all users of breezy, other scripts should instead
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# just ensure a usable locale is set via the $LANG variable on posix systems.
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_fs_enc = sys.getfilesystemencoding()
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if getattr(sys, "_brz_default_fs_enc", None) is not None:
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if (_fs_enc is None or codecs.lookup(_fs_enc).name == "ascii"):
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_fs_enc = _patch_filesystem_default_encoding(sys._brz_default_fs_enc)
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_fs_enc = codecs.lookup(_fs_enc).name
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# brz has various bits of global state that are slowly being eliminated.
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# bzr has various bits of global state that are slowly being eliminated.
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138
# This variable is intended to permit any new state-like things to be attached
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139
# to a library_state.BzrLibraryState object rather than getting new global
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140
# variables that need to be hunted down. Accessing the current BzrLibraryState
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141
# through this variable is not encouraged: it is better to pass it around as
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# part of the context of an operation than to look it up directly, but when
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# that is too hard, it is better to use this variable than to make a brand new
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# that is too hard, it is better to use this variable than to make a branch new
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# global variable.
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145
# If using this variable by looking it up (because it can't be easily obtained)
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# it is important to store the reference you get, rather than looking it up
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# repeatedly; that way your code will behave properly in the breezy test suite
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# repeatedly; that way your code will behave properly in the bzrlib test suite
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148
# and from programs that do use multiple library contexts.
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def initialize(setup_ui=True, stdin=None, stdout=None, stderr=None):
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"""Set up everything needed for normal use of breezy.
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"""Set up everything needed for normal use of bzrlib.
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Most applications that embed breezy, including brz itself, should call
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this function to initialize various subsystems.
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Most applications that embed bzrlib, including bzr itself, should call
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this function to initialize various subsystems.
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More options may be added in future so callers should use named arguments.
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The object returned by this function can be used as a contex manager
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through the 'with' statement to automatically shut down when the process
190
is finished with breezy. However it's not necessary to
191
separately enter the context as well as starting brz: breezy is ready to
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go when this function returns.
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:param setup_ui: If true (default) use a terminal UI; otherwise
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some other ui_factory must be assigned to `breezy.ui.ui_factory` by
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:param setup_ui: If true (default) use a terminal UI; otherwise
161
some other ui_factory must be assigned to `bzrlib.ui.ui_factory` by
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:param stdin, stdout, stderr: If provided, use these for terminal IO;
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otherwise use the files in `sys`.
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:return: A context manager for the use of breezy. The __exit__
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:return: A context manager for the use of bzrlib. The __enter__ method of
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this context needs to be called before it takes effect, and the __exit__
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should be called by the caller before exiting their process or
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otherwise stopping use of breezy. Advanced callers can use
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otherwise stopping use of bzrlib. Advanced callers can use
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BzrLibraryState directly.
204
from breezy import library_state, trace
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from bzrlib import library_state, trace
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stdin = stdin or sys.stdin
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stdout = stdout or sys.stdout
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stderr = stderr or sys.stderr
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ui_factory = breezy.ui.make_ui_for_terminal(stdin, stdout, stderr)
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ui_factory = bzrlib.ui.make_ui_for_terminal(stdin, stdout, stderr)
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ui_factory = None
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tracer = trace.DefaultConfig()
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state = library_state.BzrLibraryState(ui=ui_factory, trace=tracer)
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# Start automatically in case people don't realize this returns a context.
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def get_global_state():
221
if _global_state is None:
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return library_state.BzrLibraryState(ui=ui_factory, trace=tracer)
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184
def test_suite():