mercurial/demandimport.py

25326:238e5cd94bbc

  from a import *
  b = __import__(a)
'''

import __builtin__, os, sys
_origimport = __import__

nothing = object()

try:

        __builtin__.__import__ = _demandimport

def disable():
    "disable global demand-loading of modules"
    __builtin__.__import__ = _origimport

25327:2e7804110b14

  from a import *
  b = __import__(a)
'''

import __builtin__, os, sys
from contextlib import contextmanager

_origimport = __import__

nothing = object()

try:

        __builtin__.__import__ = _demandimport

def disable():
    "disable global demand-loading of modules"
    __builtin__.__import__ = _origimport

@contextmanager
def deactivated():
    "context manager for disabling demandimport in 'with' blocks"
    demandenabled = isenabled()
    if demandenabled:
        disable()

    try:
        yield
    finally:
        if demandenabled:
            enable()