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# Common utility functions used by various script execution tests
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# e.g. test_cmd_line, test_cmd_line_script and test_runpy
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from importlib.util import source_from_cache
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from test.support import make_legacy_pyc, strip_python_stderr, temp_dir
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# Executing the interpreter in a subprocess
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def _assert_python(expected_success, *args, **env_vars):
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if '__isolated' in env_vars:
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isolated = env_vars.pop('__isolated')
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isolated = not env_vars
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cmd_line = [sys.executable, '-X', 'faulthandler']
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# isolated mode: ignore Python environment variables, ignore user
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# site-packages, and don't add the current directory to sys.path
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# ignore Python environment variables
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# Need to preserve the original environment, for in-place testing of
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# shared library builds.
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env = os.environ.copy()
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# But a special flag that can be set to override -- in this case, the
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# caller is responsible to pass the full environment.
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if env_vars.pop('__cleanenv', None):
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p = subprocess.Popen(cmd_line, stdin=subprocess.PIPE,
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stdout=subprocess.PIPE, stderr=subprocess.PIPE,
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out, err = p.communicate()
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err = strip_python_stderr(err)
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if (rc and expected_success) or (not rc and not expected_success):
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"Process return code is %d, "
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"stderr follows:\n%s" % (rc, err.decode('ascii', 'ignore')))
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def assert_python_ok(*args, **env_vars):
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Assert that running the interpreter with `args` and optional environment
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variables `env_vars` succeeds (rc == 0) and return a (return code, stdout,
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If the __cleanenv keyword is set, env_vars is used a fresh environment.
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Python is started in isolated mode (command line option -I),
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except if the __isolated keyword is set to False.
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return _assert_python(True, *args, **env_vars)
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def assert_python_failure(*args, **env_vars):
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Assert that running the interpreter with `args` and optional environment
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variables `env_vars` fails (rc != 0) and return a (return code, stdout,
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See assert_python_ok() for more options.
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return _assert_python(False, *args, **env_vars)
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def spawn_python(*args, **kw):
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"""Run a Python subprocess with the given arguments.
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kw is extra keyword args to pass to subprocess.Popen. Returns a Popen
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cmd_line = [sys.executable, '-E']
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return subprocess.Popen(cmd_line, stdin=subprocess.PIPE,
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stdout=subprocess.PIPE, stderr=subprocess.STDOUT,
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"""Run the given Popen process until completion and return stdout."""
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data = p.stdout.read()
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# try to cleanup the child so we don't appear to leak when running
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subprocess._cleanup()
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def make_script(script_dir, script_basename, source):
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script_filename = script_basename+os.extsep+'py'
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script_name = os.path.join(script_dir, script_filename)
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# The script should be encoded to UTF-8, the default string encoding
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script_file = open(script_name, 'w', encoding='utf-8')
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script_file.write(source)
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importlib.invalidate_caches()
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def make_zip_script(zip_dir, zip_basename, script_name, name_in_zip=None):
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zip_filename = zip_basename+os.extsep+'zip'
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zip_name = os.path.join(zip_dir, zip_filename)
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zip_file = zipfile.ZipFile(zip_name, 'w')
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if name_in_zip is None:
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parts = script_name.split(os.sep)
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if len(parts) >= 2 and parts[-2] == '__pycache__':
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legacy_pyc = make_legacy_pyc(source_from_cache(script_name))
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name_in_zip = os.path.basename(legacy_pyc)
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script_name = legacy_pyc
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name_in_zip = os.path.basename(script_name)
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zip_file.write(script_name, name_in_zip)
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#if test.support.verbose:
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# zip_file = zipfile.ZipFile(zip_name, 'r')
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# print 'Contents of %r:' % zip_name
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# zip_file.printdir()
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return zip_name, os.path.join(zip_name, name_in_zip)
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def make_pkg(pkg_dir, init_source=''):
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make_script(pkg_dir, '__init__', init_source)
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def make_zip_pkg(zip_dir, zip_basename, pkg_name, script_basename,
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source, depth=1, compiled=False):
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init_name = make_script(zip_dir, '__init__', '')
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unlink.append(init_name)
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init_basename = os.path.basename(init_name)
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script_name = make_script(zip_dir, script_basename, source)
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unlink.append(script_name)
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init_name = py_compile(init_name, doraise=True)
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script_name = py_compile(script_name, doraise=True)
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unlink.extend((init_name, script_name))
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pkg_names = [os.sep.join([pkg_name]*i) for i in range(1, depth+1)]
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script_name_in_zip = os.path.join(pkg_names[-1], os.path.basename(script_name))
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zip_filename = zip_basename+os.extsep+'zip'
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zip_name = os.path.join(zip_dir, zip_filename)
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zip_file = zipfile.ZipFile(zip_name, 'w')
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for name in pkg_names:
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init_name_in_zip = os.path.join(name, init_basename)
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zip_file.write(init_name, init_name_in_zip)
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zip_file.write(script_name, script_name_in_zip)
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#if test.support.verbose:
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# zip_file = zipfile.ZipFile(zip_name, 'r')
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# print 'Contents of %r:' % zip_name
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# zip_file.printdir()
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return zip_name, os.path.join(zip_name, script_name_in_zip)