from __future__ import absolute_import, print_function

from mercurial import demandimport

demandimport.enable()

import os

import subprocess

import sys

# Only run if demandimport is allowed

if subprocess.call(['python', '%s/hghave' % os.environ['TESTDIR'],

                    'demandimport']):

    sys.exit(80)

if os.name != 'nt':

    try:

        import distutils.msvc9compiler

        print('distutils.msvc9compiler needs to be an immediate '

              'importerror on non-windows platforms')

        distutils.msvc9compiler

    except ImportError:

        pass

import re

rsub = re.sub

def f(obj):

    l = repr(obj)

    l = rsub("0x[0-9a-fA-F]+", "0x?", l)

    l = rsub("from '.*'", "from '?'", l)

    l = rsub("'<[a-z]*>'", "'<whatever>'", l)

    return l

demandimport.disable()

os.environ['HGDEMANDIMPORT'] = 'disable'

# this enable call should not actually enable demandimport!

demandimport.enable()

from mercurial import node

print("node =", f(node))

# now enable it for real

del os.environ['HGDEMANDIMPORT']

demandimport.enable()

import os

print("os =", f(os))

print("os.system =", f(os.system))

print("os =", f(os))

from mercurial import util

print("util =", f(util))

print("util.system =", f(util.system))

print("util =", f(util))

print("util.system =", f(util.system))

from mercurial import hgweb

print("hgweb =", f(hgweb))

print("hgweb_mod =", f(hgweb.hgweb_mod))

print("hgweb =", f(hgweb))

import re as fred

print("fred =", f(fred))

import re as remod

print("remod =", f(remod))

import sys as re

print("re =", f(re))

print("fred =", f(fred))

print("fred.sub =", f(fred.sub))

print("fred =", f(fred))

remod.escape  # use remod

print("remod =", f(remod))

print("re =", f(re))

print("re.stderr =", f(re.stderr))

print("re =", f(re))

import contextlib

print("contextlib =", f(contextlib))

try:

    from contextlib import unknownattr

    print('no demandmod should be created for attribute of non-package '

          'module:\ncontextlib.unknownattr =', f(unknownattr))

except ImportError as inst:

    print('contextlib.unknownattr = ImportError: %s'

          % rsub(r"'", '', str(inst)))

# Unlike the import statement, __import__() function should not raise

# ImportError even if fromlist has an unknown item

# (see Python/import.c:import_module_level() and ensure_fromlist())

contextlibimp = __import__('contextlib', globals(), locals(), ['unknownattr'])

print("__import__('contextlib', ..., ['unknownattr']) =", f(contextlibimp))

print("hasattr(contextlibimp, 'unknownattr') =",

      util.safehasattr(contextlibimp, 'unknownattr'))