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# Common utility functions used by various script execution tests
# e.g. test_cmd_line, test_cmd_line_script and test_runpy
import importlib
import sys
import os
import os.path
import tempfile
import subprocess
import py_compile
import contextlib
import shutil
import zipfile
from importlib.util import source_from_cache
from test.support import make_legacy_pyc, strip_python_stderr, temp_dir
# Executing the interpreter in a subprocess
def _assert_python(expected_success, *args, **env_vars):
if '__isolated' in env_vars:
isolated = env_vars.pop('__isolated')
else:
isolated = not env_vars
cmd_line = [sys.executable, '-X', 'faulthandler']
if isolated:
# isolated mode: ignore Python environment variables, ignore user
# site-packages, and don't add the current directory to sys.path
cmd_line.append('-I')
elif not env_vars:
# ignore Python environment variables
cmd_line.append('-E')
# Need to preserve the original environment, for in-place testing of
# shared library builds.
env = os.environ.copy()
# But a special flag that can be set to override -- in this case, the
# caller is responsible to pass the full environment.
if env_vars.pop('__cleanenv', None):
env = {}
env.update(env_vars)
cmd_line.extend(args)
p = subprocess.Popen(cmd_line, stdin=subprocess.PIPE,
stdout=subprocess.PIPE, stderr=subprocess.PIPE,
env=env)
try:
out, err = p.communicate()
finally:
subprocess._cleanup()
p.stdout.close()
p.stderr.close()
rc = p.returncode
err = strip_python_stderr(err)
if (rc and expected_success) or (not rc and not expected_success):
raise AssertionError(
"Process return code is %d, command line was: %r, "
"stderr follows:\n%s" % (rc, cmd_line,
err.decode('ascii', 'ignore')))
return rc, out, err
def assert_python_ok(*args, **env_vars):
"""
Assert that running the interpreter with `args` and optional environment
variables `env_vars` succeeds (rc == 0) and return a (return code, stdout,
stderr) tuple.
If the __cleanenv keyword is set, env_vars is used a fresh environment.
Python is started in isolated mode (command line option -I),
except if the __isolated keyword is set to False.
"""
return _assert_python(True, *args, **env_vars)
def assert_python_failure(*args, **env_vars):
"""
Assert that running the interpreter with `args` and optional environment
variables `env_vars` fails (rc != 0) and return a (return code, stdout,
stderr) tuple.
See assert_python_ok() for more options.
"""
return _assert_python(False, *args, **env_vars)
def spawn_python(*args, stdout=subprocess.PIPE, stderr=subprocess.STDOUT, **kw):
"""Run a Python subprocess with the given arguments.
kw is extra keyword args to pass to subprocess.Popen. Returns a Popen
object.
"""
cmd_line = [sys.executable, '-E']
cmd_line.extend(args)
# Under Fedora (?), GNU readline can output junk on stderr when initialized,
# depending on the TERM setting. Setting TERM=vt100 is supposed to disable
# that. References:
# - http://reinout.vanrees.org/weblog/2009/08/14/readline-invisible-character-hack.html
# - http://stackoverflow.com/questions/15760712/python-readline-module-prints-escape-character-during-import
# - http://lists.gnu.org/archive/html/bug-readline/2007-08/msg00004.html
env = kw.setdefault('env', dict(os.environ))
env['TERM'] = 'vt100'
return subprocess.Popen(cmd_line, stdin=subprocess.PIPE,
stdout=stdout, stderr=stderr,
**kw)
def kill_python(p):
"""Run the given Popen process until completion and return stdout."""
p.stdin.close()
data = p.stdout.read()
p.stdout.close()
# try to cleanup the child so we don't appear to leak when running
# with regrtest -R.
p.wait()
subprocess._cleanup()
return data
def make_script(script_dir, script_basename, source, omit_suffix=False):
script_filename = script_basename
if not omit_suffix:
script_filename += os.extsep + 'py'
script_name = os.path.join(script_dir, script_filename)
# The script should be encoded to UTF-8, the default string encoding
script_file = open(script_name, 'w', encoding='utf-8')
script_file.write(source)
script_file.close()
importlib.invalidate_caches()
return script_name
def make_zip_script(zip_dir, zip_basename, script_name, name_in_zip=None):
zip_filename = zip_basename+os.extsep+'zip'
zip_name = os.path.join(zip_dir, zip_filename)
zip_file = zipfile.ZipFile(zip_name, 'w')
if name_in_zip is None:
parts = script_name.split(os.sep)
if len(parts) >= 2 and parts[-2] == '__pycache__':
legacy_pyc = make_legacy_pyc(source_from_cache(script_name))
name_in_zip = os.path.basename(legacy_pyc)
script_name = legacy_pyc
else:
name_in_zip = os.path.basename(script_name)
zip_file.write(script_name, name_in_zip)
zip_file.close()
#if test.support.verbose:
# zip_file = zipfile.ZipFile(zip_name, 'r')
# print 'Contents of %r:' % zip_name
# zip_file.printdir()
# zip_file.close()
return zip_name, os.path.join(zip_name, name_in_zip)
def make_pkg(pkg_dir, init_source=''):
os.mkdir(pkg_dir)
make_script(pkg_dir, '__init__', init_source)
def make_zip_pkg(zip_dir, zip_basename, pkg_name, script_basename,
source, depth=1, compiled=False):
unlink = []
init_name = make_script(zip_dir, '__init__', '')
unlink.append(init_name)
init_basename = os.path.basename(init_name)
script_name = make_script(zip_dir, script_basename, source)
unlink.append(script_name)
if compiled:
init_name = py_compile.compile(init_name, doraise=True)
script_name = py_compile.compile(script_name, doraise=True)
unlink.extend((init_name, script_name))
pkg_names = [os.sep.join([pkg_name]*i) for i in range(1, depth+1)]
script_name_in_zip = os.path.join(pkg_names[-1], os.path.basename(script_name))
zip_filename = zip_basename+os.extsep+'zip'
zip_name = os.path.join(zip_dir, zip_filename)
zip_file = zipfile.ZipFile(zip_name, 'w')
for name in pkg_names:
init_name_in_zip = os.path.join(name, init_basename)
zip_file.write(init_name, init_name_in_zip)
zip_file.write(script_name, script_name_in_zip)
zip_file.close()
for name in unlink:
os.unlink(name)
#if test.support.verbose:
# zip_file = zipfile.ZipFile(zip_name, 'r')
# print 'Contents of %r:' % zip_name
# zip_file.printdir()
# zip_file.close()
return zip_name, os.path.join(zip_name, script_name_in_zip)
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