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Copy pathimportcompletion.py
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195 lines (172 loc) · 6.22 KB
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# The MIT License
#
# Copyright (c) 2009-2011 Andreas Stuehrk
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
from __future__ import with_statement
import imp
import os
import sys
import warnings
try:
from warnings import catch_warnings
except ImportError:
import contextlib
@contextlib.contextmanager
def catch_warnings():
"""Stripped-down version of `warnings.catch_warnings()`
(available in Py >= 2.6)."""
filters = warnings.filters
warnings.filters = list(filters)
try:
yield
finally:
warnings.filters = filters
from bpython._py3compat import py3
# The cached list of all known modules
modules = set()
fully_loaded = False
def complete(line, cw):
"""Construct a full list of possibly completions for imports."""
if not cw:
return None
tokens = line.split()
if tokens[0] not in ['from', 'import']:
return None
completing_from = False
if tokens[0] == 'from':
if len(tokens) > 3:
if '.' in cw:
# This will result in a SyntaxError, so do not return
# any matches
return None
completing_from = True
cw = '%s.%s' % (tokens[1], cw)
elif len(tokens) == 3:
if 'import '.startswith(cw):
return ['import ']
else:
# Will result in a SyntaxError
return None
matches = list()
for name in modules:
if not (name.startswith(cw) and name.find('.', len(cw)) == -1):
continue
if completing_from:
name = name[len(tokens[1]) + 1:]
matches.append(name)
if completing_from and tokens[1] in sys.modules:
# from x import y -> search for attributes starting with y if
# x is in sys.modules
_, _, cw = cw.rpartition('.')
module = sys.modules[tokens[1]]
matches.extend(name for name in dir(module) if name.startswith(cw))
elif len(tokens) == 2:
# from x.y or import x.y -> search for attributes starting
# with y if x is in sys.modules and the attribute is also in
# sys.modules
module_name, _, cw = cw.rpartition('.')
if module_name in sys.modules:
module = sys.modules[module_name]
for name in dir(module):
if not name.startswith(cw):
continue
submodule_name = '%s.%s' % (module_name, name)
if submodule_name in sys.modules:
matches.append(submodule_name)
if not matches:
return []
return matches
def find_modules(path):
"""Find all modules (and packages) for a given directory."""
if not os.path.isdir(path):
# Perhaps a zip file
return
try:
filenames = os.listdir(path)
except EnvironmentError:
filenames = []
for name in filenames:
if not any(name.endswith(suffix[0]) for suffix in imp.get_suffixes()):
# Possibly a package
if '.' in name:
continue
elif os.path.isdir(os.path.join(path, name)):
# Unfortunately, CPython just crashes if there is a directory
# which ends with a python extension, so work around.
continue
for suffix in imp.get_suffixes():
if name.endswith(suffix[0]):
name = name[:-len(suffix[0])]
break
if py3 and name == "badsyntax_pep3120":
# Workaround for issue #166
continue
try:
with catch_warnings():
warnings.simplefilter("ignore", ImportWarning)
fo, pathname, _ = imp.find_module(name, [path])
except (ImportError, IOError, SyntaxError):
continue
except UnicodeEncodeError:
# Happens with Python 3 when there is a filename in some
# invalid encoding
continue
else:
if fo is not None:
fo.close()
else:
# Yay, package
for subname in find_modules(pathname):
if subname != '__init__':
yield '%s.%s' % (name, subname)
yield name
def find_all_modules(path=None):
"""Return a list with all modules in `path`, which should be a list of
directory names. If path is not given, sys.path will be used."""
if path is None:
modules.update(sys.builtin_module_names)
path = sys.path
for p in path:
if not p:
p = os.curdir
for module in find_modules(p):
if not py3 and not isinstance(module, unicode):
try:
module = module.decode(sys.getfilesystemencoding())
except UnicodeDecodeError:
# Not importable anyway, ignore it
continue
modules.add(module)
yield
def find_coroutine():
global fully_loaded
if fully_loaded:
return None
try:
find_iterator.next()
except StopIteration:
fully_loaded = True
return True
def reload():
"""Refresh the list of known modules."""
modules.clear()
for _ in find_all_modules():
pass
find_iterator = find_all_modules()