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import os

import sys

import semmle

import unittest

import shutil

import re

from contextlib import contextmanager

import semmle.populator

import subprocess

BUILTIN_TRAP = "builtins.trap.gz"

PY_PATTERN = re.compile(r"(\w+)\.py.[A-Za-z0-9=_\-]+\.trap\.gz")

FOLDER_PATTERN = re.compile(r"(\w+).[A-Za-z0-9=_\-]+\.trap\.gz")

@contextmanager

def environment(key, value):

os.environ[key] = value

try:

yield

finally:

del os.environ[key]

class ExtractorTest(unittest.TestCase):

def __init__(self, name):

unittest.TestCase.__init__(self, name)

self.here = os.path.dirname(__file__)

self.module_path = os.path.abspath(os.path.join(self.here, "data"))

self.trap_path = os.path.abspath(os.path.join(self.here, "traps"))

self.src_archive = None

def setUp(self):

try:

os.makedirs(self.trap_path)

except:

if os.path.exists(self.trap_path):

return

raise

def tearDown(self):

shutil.rmtree(self.trap_path, ignore_errors=True)

def check_only_traps_exists_and_clear(self, *module_names):

modules = list(module_names)

for filename in os.listdir(self.trap_path):

match = PY_PATTERN.match(filename)

if match:

name = match.group(1)

else:

match = FOLDER_PATTERN.match(filename)

if match:

name = match.group(1) + "/"

else:

continue

if name in modules:

modules.remove(name)

path = os.path.join(self.trap_path, filename)

os.remove(path)

if modules:

self.fail("No trap file for " + modules.pop())

for _, _, filenames in os.walk(self.trap_path):

#Ignore the builtin trap file, any `__init__.py` files, and $file, $interpreter trap files.

filenames = [ name for name in filenames if not name.startswith("$") and not name.startswith("__init__.py") and name != BUILTIN_TRAP]

self.assertFalse(filenames, "Some trap files remain: " + ", ".join(filenames))

def check_source_exists_and_clear(self, path):

try:

os.remove(path)

except OSError:

self.fail("File '%s' does not exist" % path)

def run_extractor(self, *args):

cmd = [sys.executable, os.path.join(os.path.dirname(self.here), "python_tracer.py"), "--quiet" ] + ["-p", self.module_path, "-o", self.trap_path] + list(args)

with environment("CODEQL_EXTRACTOR_PYTHON_ENABLE_PYTHON2_EXTRACTION", "True"):

if self.src_archive:

with environment("CODEQL_EXTRACTOR_PYTHON_SOURCE_ARCHIVE_DIR", self.src_archive):

subprocess.check_call(cmd)

else:

subprocess.check_call(cmd)

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