Mercurial > hg
view mercurial/thirdparty/attr/_funcs.py @ 35935:00b9e26d727b
sshpeer: establish SSH connection before class instantiation
We want to move the handshake to before peers are created so
we can instantiate a different peer class depending on the
results of the handshake. This necessitates moving the SSH
process invocation to outside the peer class.
As part of the code move, some variables were renamed for
clarity. util.popen4() returns stdin, stdout, and stderr in
their typical file descriptor order. However, stdin and stdout
were being mapped to "pipeo" and "pipei" respectively. "o"
for "stdin" and "i" for "stdout" is a bit confusing. Although
it does make sense for "output" and "input" from the perspective
of the client. But in the context of the new function, it makes
sense to refer to these as their file descriptor names.
In addition, the last use of self._path disappeared, so we stop
setting that attribute and we can delete the redundant URL
parsing necessary to set it.
Differential Revision: https://phab.mercurial-scm.org/D2031
author | Gregory Szorc <gregory.szorc@gmail.com> |
---|---|
date | Mon, 05 Feb 2018 14:05:59 -0800 |
parents | 765eb17a7eb8 |
children | e1c586b9a43c |
line wrap: on
line source
from __future__ import absolute_import, division, print_function import copy from ._compat import iteritems from ._make import NOTHING, fields, _obj_setattr from .exceptions import AttrsAttributeNotFoundError def asdict(inst, recurse=True, filter=None, dict_factory=dict, retain_collection_types=False): """ Return the ``attrs`` attribute values of *inst* as a dict. Optionally recurse into other ``attrs``-decorated classes. :param inst: Instance of an ``attrs``-decorated class. :param bool recurse: Recurse into classes that are also ``attrs``-decorated. :param callable filter: A callable whose return code deteremines whether an attribute or element is included (``True``) or dropped (``False``). Is called with the :class:`attr.Attribute` as the first argument and the value as the second argument. :param callable dict_factory: A callable to produce dictionaries from. For example, to produce ordered dictionaries instead of normal Python dictionaries, pass in ``collections.OrderedDict``. :param bool retain_collection_types: Do not convert to ``list`` when encountering an attribute whose type is ``tuple`` or ``set``. Only meaningful if ``recurse`` is ``True``. :rtype: return type of *dict_factory* :raise attr.exceptions.NotAnAttrsClassError: If *cls* is not an ``attrs`` class. .. versionadded:: 16.0.0 *dict_factory* .. versionadded:: 16.1.0 *retain_collection_types* """ attrs = fields(inst.__class__) rv = dict_factory() for a in attrs: v = getattr(inst, a.name) if filter is not None and not filter(a, v): continue if recurse is True: if has(v.__class__): rv[a.name] = asdict(v, recurse=True, filter=filter, dict_factory=dict_factory) elif isinstance(v, (tuple, list, set)): cf = v.__class__ if retain_collection_types is True else list rv[a.name] = cf([ asdict(i, recurse=True, filter=filter, dict_factory=dict_factory) if has(i.__class__) else i for i in v ]) elif isinstance(v, dict): df = dict_factory rv[a.name] = df(( asdict(kk, dict_factory=df) if has(kk.__class__) else kk, asdict(vv, dict_factory=df) if has(vv.__class__) else vv) for kk, vv in iteritems(v)) else: rv[a.name] = v else: rv[a.name] = v return rv def astuple(inst, recurse=True, filter=None, tuple_factory=tuple, retain_collection_types=False): """ Return the ``attrs`` attribute values of *inst* as a tuple. Optionally recurse into other ``attrs``-decorated classes. :param inst: Instance of an ``attrs``-decorated class. :param bool recurse: Recurse into classes that are also ``attrs``-decorated. :param callable filter: A callable whose return code determines whether an attribute or element is included (``True``) or dropped (``False``). Is called with the :class:`attr.Attribute` as the first argument and the value as the second argument. :param callable tuple_factory: A callable to produce tuples from. For example, to produce lists instead of tuples. :param bool retain_collection_types: Do not convert to ``list`` or ``dict`` when encountering an attribute which type is ``tuple``, ``dict`` or ``set``. Only meaningful if ``recurse`` is ``True``. :rtype: return type of *tuple_factory* :raise attr.exceptions.NotAnAttrsClassError: If *cls* is not an ``attrs`` class. .. versionadded:: 16.2.0 """ attrs = fields(inst.__class__) rv = [] retain = retain_collection_types # Very long. :/ for a in attrs: v = getattr(inst, a.name) if filter is not None and not filter(a, v): continue if recurse is True: if has(v.__class__): rv.append(astuple(v, recurse=True, filter=filter, tuple_factory=tuple_factory, retain_collection_types=retain)) elif isinstance(v, (tuple, list, set)): cf = v.__class__ if retain is True else list rv.append(cf([ astuple(j, recurse=True, filter=filter, tuple_factory=tuple_factory, retain_collection_types=retain) if has(j.__class__) else j for j in v ])) elif isinstance(v, dict): df = v.__class__ if retain is True else dict rv.append(df( ( astuple( kk, tuple_factory=tuple_factory, retain_collection_types=retain ) if has(kk.__class__) else kk, astuple( vv, tuple_factory=tuple_factory, retain_collection_types=retain ) if has(vv.__class__) else vv ) for kk, vv in iteritems(v))) else: rv.append(v) else: rv.append(v) return rv if tuple_factory is list else tuple_factory(rv) def has(cls): """ Check whether *cls* is a class with ``attrs`` attributes. :param type cls: Class to introspect. :raise TypeError: If *cls* is not a class. :rtype: :class:`bool` """ return getattr(cls, "__attrs_attrs__", None) is not None def assoc(inst, **changes): """ Copy *inst* and apply *changes*. :param inst: Instance of a class with ``attrs`` attributes. :param changes: Keyword changes in the new copy. :return: A copy of inst with *changes* incorporated. :raise attr.exceptions.AttrsAttributeNotFoundError: If *attr_name* couldn't be found on *cls*. :raise attr.exceptions.NotAnAttrsClassError: If *cls* is not an ``attrs`` class. .. deprecated:: 17.1.0 Use :func:`evolve` instead. """ import warnings warnings.warn("assoc is deprecated and will be removed after 2018/01.", DeprecationWarning) new = copy.copy(inst) attrs = fields(inst.__class__) for k, v in iteritems(changes): a = getattr(attrs, k, NOTHING) if a is NOTHING: raise AttrsAttributeNotFoundError( "{k} is not an attrs attribute on {cl}." .format(k=k, cl=new.__class__) ) _obj_setattr(new, k, v) return new def evolve(inst, **changes): """ Create a new instance, based on *inst* with *changes* applied. :param inst: Instance of a class with ``attrs`` attributes. :param changes: Keyword changes in the new copy. :return: A copy of inst with *changes* incorporated. :raise TypeError: If *attr_name* couldn't be found in the class ``__init__``. :raise attr.exceptions.NotAnAttrsClassError: If *cls* is not an ``attrs`` class. .. versionadded:: 17.1.0 """ cls = inst.__class__ attrs = fields(cls) for a in attrs: if not a.init: continue attr_name = a.name # To deal with private attributes. init_name = attr_name if attr_name[0] != "_" else attr_name[1:] if init_name not in changes: changes[init_name] = getattr(inst, attr_name) return cls(**changes)