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Issue #13959: Re-implement imp.source_from_cache() in Lib/imp.py.

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Brett Cannon 2012-04-21 18:52:52 -04:00
parent ea59dbff16
commit a64faf0771
4 changed files with 3199 additions and 3198 deletions
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26
Lib/imp.py
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@ -13,7 +13,7 @@ from _imp import (lock_held, acquire_lock, release_lock, reload,
# Could move out of _imp, but not worth the code
from _imp import get_magic
# Can (probably) move to importlib
from _imp import (get_tag, get_suffixes, source_from_cache)
from _imp import (get_tag, get_suffixes)
# Should be re-implemented here (and mostly deprecated)
from _imp import (find_module, NullImporter,
SEARCH_ERROR, PY_SOURCE, PY_COMPILED, C_EXTENSION,
@ -27,6 +27,26 @@ from importlib import _bootstrap
import os
def source_from_cache(path):
"""Given the path to a .pyc./.pyo file, return the path to its .py file.
The .pyc/.pyo file does not need to exist; this simply returns the path to
the .py file calculated to correspond to the .pyc/.pyo file. If path does
not conform to PEP 3147 format, ValueError will be raised.
"""
head, pycache_filename = os.path.split(path)
head, pycache = os.path.split(head)
if pycache != _bootstrap.PYCACHE:
raise ValueError('{} not bottom-level directory in '
'{!r}'.format(_bootstrap.PYCACHE, path))
if pycache_filename.count('.') != 2:
raise ValueError('expected only 2 dots in '
'{!r}'.format(pycache_filename))
base_filename = pycache_filename.partition('.')[0]
return os.path.join(head, base_filename + _bootstrap.SOURCE_SUFFIXES[0])
class _HackedGetData:
"""Compatibiilty support for 'file' arguments of various load_*()
@ -55,6 +75,7 @@ class _LoadSourceCompatibility(_HackedGetData, _bootstrap._SourceFileLoader):
"""Compatibility support for implementing load_source()."""
# XXX deprecate after better API exposed in importlib
def load_source(name, pathname, file=None):
return _LoadSourceCompatibility(name, pathname, file).load_module(name)
@ -65,10 +86,12 @@ class _LoadCompiledCompatibility(_HackedGetData,
"""Compatibility support for implementing load_compiled()."""
# XXX deprecate
def load_compiled(name, pathname, file=None):
return _LoadCompiledCompatibility(name, pathname, file).load_module(name)
# XXX deprecate
def load_package(name, path):
if os.path.isdir(path):
extensions = _bootstrap._suffix_list(PY_SOURCE)
@ -82,6 +105,7 @@ def load_package(name, path):
return _bootstrap._SourceFileLoader(name, path).load_module(name)
# XXX deprecate
def load_module(name, file, filename, details):
"""Load a module, given information returned by find_module().