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ansible/test/lib/ansible_test/_internal/util_common.py

458 lines
15 KiB
Python

"""Common utility code that depends on CommonConfig."""
from __future__ import annotations
import atexit
import contextlib
import json
import os
import re
import shlex
import sys
import tempfile
import textwrap
import typing as t
from .constants import (
ANSIBLE_BIN_SYMLINK_MAP,
)
from .encoding import (
to_bytes,
)
from .util import (
cache,
display,
remove_tree,
MODE_DIRECTORY,
MODE_FILE_EXECUTE,
MODE_FILE,
PYTHON_PATHS,
raw_command,
ANSIBLE_TEST_DATA_ROOT,
ANSIBLE_TEST_TARGET_ROOT,
ANSIBLE_TEST_TARGET_TOOLS_ROOT,
ApplicationError,
SubprocessError,
generate_name,
)
from .io import (
make_dirs,
read_text_file,
write_text_file,
write_json_file,
)
from .data import (
data_context,
)
from .provider.layout import (
LayoutMessages,
)
from .host_configs import (
PythonConfig,
VirtualPythonConfig,
)
CHECK_YAML_VERSIONS = {} # type: t.Dict[str, t.Any]
class ShellScriptTemplate:
"""A simple substition template for shell scripts."""
def __init__(self, template): # type: (t.Text) -> None
self.template = template
def substitute(self, **kwargs: t.Union[str, t.List[str]]) -> str:
"""Return a string templated with the given arguments."""
kvp = dict((k, self.quote(v)) for k, v in kwargs.items())
pattern = re.compile(r'#{(?P<name>[^}]+)}')
value = pattern.sub(lambda match: kvp[match.group('name')], self.template)
return value
@staticmethod
def quote(value): # type: (t.Union[str, t.List[str]]) -> str
"""Return a shell quoted version of the given value."""
if isinstance(value, list):
return shlex.quote(' '.join(value))
return shlex.quote(value)
class ResultType:
"""Test result type."""
BOT = None # type: ResultType
COVERAGE = None # type: ResultType
DATA = None # type: ResultType
JUNIT = None # type: ResultType
LOGS = None # type: ResultType
REPORTS = None # type: ResultType
TMP = None # type: ResultType
@staticmethod
def _populate():
ResultType.BOT = ResultType('bot')
ResultType.COVERAGE = ResultType('coverage')
ResultType.DATA = ResultType('data')
ResultType.JUNIT = ResultType('junit')
ResultType.LOGS = ResultType('logs')
ResultType.REPORTS = ResultType('reports')
ResultType.TMP = ResultType('.tmp')
def __init__(self, name): # type: (str) -> None
self.name = name
@property
def relative_path(self): # type: () -> str
"""The content relative path to the results."""
return os.path.join(data_context().content.results_path, self.name)
@property
def path(self): # type: () -> str
"""The absolute path to the results."""
return os.path.join(data_context().content.root, self.relative_path)
def __str__(self): # type: () -> str
return self.name
# noinspection PyProtectedMember
ResultType._populate() # pylint: disable=protected-access
class CommonConfig:
"""Configuration common to all commands."""
def __init__(self, args, command): # type: (t.Any, str) -> None
self.command = command
self.interactive = False
self.check_layout = True
self.success = None # type: t.Optional[bool]
self.color = args.color # type: bool
self.explain = args.explain # type: bool
self.verbosity = args.verbosity # type: int
self.debug = args.debug # type: bool
self.truncate = args.truncate # type: int
self.redact = args.redact # type: bool
self.display_stderr = False # type: bool
self.session_name = generate_name()
self.cache = {} # type: t.Dict[str, t.Any]
def get_ansible_config(self): # type: () -> str
"""Return the path to the Ansible config for the given config."""
return os.path.join(ANSIBLE_TEST_DATA_ROOT, 'ansible.cfg')
def create_result_directories(args): # type: (CommonConfig) -> None
"""Create result directories."""
if args.explain:
return
make_dirs(ResultType.COVERAGE.path)
make_dirs(ResultType.DATA.path)
def handle_layout_messages(messages): # type: (t.Optional[LayoutMessages]) -> None
"""Display the given layout messages."""
if not messages:
return
for message in messages.info:
display.info(message, verbosity=1)
for message in messages.warning:
display.warning(message)
if messages.error:
raise ApplicationError('\n'.join(messages.error))
def process_scoped_temporary_file(args, prefix='ansible-test-', suffix=None): # type: (CommonConfig, t.Optional[str], t.Optional[str]) -> str
"""Return the path to a temporary file that will be automatically removed when the process exits."""
if args.explain:
path = os.path.join(tempfile.gettempdir(), f'{prefix or tempfile.gettempprefix()}{generate_name()}{suffix or ""}')
else:
temp_fd, path = tempfile.mkstemp(prefix=prefix, suffix=suffix)
os.close(temp_fd)
atexit.register(lambda: os.remove(path))
return path
def process_scoped_temporary_directory(args, prefix='ansible-test-', suffix=None): # type: (CommonConfig, t.Optional[str], t.Optional[str]) -> str
"""Return the path to a temporary directory that will be automatically removed when the process exits."""
if args.explain:
path = os.path.join(tempfile.gettempdir(), f'{prefix or tempfile.gettempprefix()}{generate_name()}{suffix or ""}')
else:
path = tempfile.mkdtemp(prefix=prefix, suffix=suffix)
atexit.register(lambda: remove_tree(path))
return path
@contextlib.contextmanager
def named_temporary_file(args, prefix, suffix, directory, content): # type: (CommonConfig, str, str, t.Optional[str], str) -> t.Iterator[str]
"""Context manager for a named temporary file."""
if args.explain:
yield os.path.join(directory or '/tmp', '%stemp%s' % (prefix, suffix))
else:
with tempfile.NamedTemporaryFile(prefix=prefix, suffix=suffix, dir=directory) as tempfile_fd:
tempfile_fd.write(to_bytes(content))
tempfile_fd.flush()
yield tempfile_fd.name
def write_json_test_results(category, # type: ResultType
name, # type: str
content, # type: t.Union[t.List[t.Any], t.Dict[str, t.Any]]
formatted=True, # type: bool
encoder=None, # type: t.Optional[t.Type[json.JSONEncoder]]
): # type: (...) -> None
"""Write the given json content to the specified test results path, creating directories as needed."""
path = os.path.join(category.path, name)
write_json_file(path, content, create_directories=True, formatted=formatted, encoder=encoder)
def write_text_test_results(category, name, content): # type: (ResultType, str, str) -> None
"""Write the given text content to the specified test results path, creating directories as needed."""
path = os.path.join(category.path, name)
write_text_file(path, content, create_directories=True)
@cache
def get_injector_path(): # type: () -> str
"""Return the path to a directory which contains a `python.py` executable and associated injector scripts."""
injector_path = tempfile.mkdtemp(prefix='ansible-test-', suffix='-injector', dir='/tmp')
display.info(f'Initializing "{injector_path}" as the temporary injector directory.', verbosity=1)
injector_names = sorted(list(ANSIBLE_BIN_SYMLINK_MAP) + [
'importer.py',
'pytest',
])
scripts = (
('python.py', '/usr/bin/env python', MODE_FILE_EXECUTE),
('virtualenv.sh', '/usr/bin/env bash', MODE_FILE),
)
source_path = os.path.join(ANSIBLE_TEST_TARGET_ROOT, 'injector')
for name in injector_names:
os.symlink('python.py', os.path.join(injector_path, name))
for name, shebang, mode in scripts:
src = os.path.join(source_path, name)
dst = os.path.join(injector_path, name)
script = read_text_file(src)
script = set_shebang(script, shebang)
write_text_file(dst, script)
os.chmod(dst, mode)
os.chmod(injector_path, MODE_DIRECTORY)
def cleanup_injector():
"""Remove the temporary injector directory."""
remove_tree(injector_path)
atexit.register(cleanup_injector)
return injector_path
def set_shebang(script, executable): # type: (str, str) -> str
"""Return the given script with the specified executable used for the shebang."""
prefix = '#!'
shebang = prefix + executable
overwrite = (
prefix,
'# auto-shebang',
'# shellcheck shell=',
)
lines = script.splitlines()
if any(lines[0].startswith(value) for value in overwrite):
lines[0] = shebang
else:
lines.insert(0, shebang)
script = '\n'.join(lines)
return script
def get_python_path(interpreter): # type: (str) -> str
"""Return the path to a directory which contains a `python` executable that runs the specified interpreter."""
python_path = PYTHON_PATHS.get(interpreter)
if python_path:
return python_path
prefix = 'python-'
suffix = '-ansible'
root_temp_dir = '/tmp'
python_path = tempfile.mkdtemp(prefix=prefix, suffix=suffix, dir=root_temp_dir)
injected_interpreter = os.path.join(python_path, 'python')
# A symlink is faster than the execv wrapper, but isn't guaranteed to provide the correct result.
# There are several scenarios known not to work with symlinks:
#
# - A virtual environment where the target is a symlink to another directory.
# - A pyenv environment where the target is a shell script that changes behavior based on the program name.
#
# To avoid issues for these and other scenarios, only an exec wrapper is used.
display.info('Injecting "%s" as a execv wrapper for the "%s" interpreter.' % (injected_interpreter, interpreter), verbosity=1)
create_interpreter_wrapper(interpreter, injected_interpreter)
os.chmod(python_path, MODE_DIRECTORY)
if not PYTHON_PATHS:
atexit.register(cleanup_python_paths)
PYTHON_PATHS[interpreter] = python_path
return python_path
def create_temp_dir(prefix=None, suffix=None, base_dir=None): # type: (t.Optional[str], t.Optional[str], t.Optional[str]) -> str
"""Create a temporary directory that persists until the current process exits."""
temp_path = tempfile.mkdtemp(prefix=prefix or 'tmp', suffix=suffix or '', dir=base_dir)
atexit.register(remove_tree, temp_path)
return temp_path
def create_interpreter_wrapper(interpreter, injected_interpreter): # type: (str, str) -> None
"""Create a wrapper for the given Python interpreter at the specified path."""
# sys.executable is used for the shebang to guarantee it is a binary instead of a script
# injected_interpreter could be a script from the system or our own wrapper created for the --venv option
shebang_interpreter = sys.executable
code = textwrap.dedent('''
#!%s
from __future__ import absolute_import
from os import execv
from sys import argv
python = '%s'
execv(python, [python] + argv[1:])
''' % (shebang_interpreter, interpreter)).lstrip()
write_text_file(injected_interpreter, code)
os.chmod(injected_interpreter, MODE_FILE_EXECUTE)
def cleanup_python_paths():
"""Clean up all temporary python directories."""
for path in sorted(PYTHON_PATHS.values()):
display.info('Cleaning up temporary python directory: %s' % path, verbosity=2)
remove_tree(path)
def intercept_python(
args, # type: CommonConfig
python, # type: PythonConfig
cmd, # type: t.List[str]
env, # type: t.Dict[str, str]
capture, # type: bool
data=None, # type: t.Optional[str]
cwd=None, # type: t.Optional[str]
always=False, # type: bool
): # type: (...) -> t.Tuple[t.Optional[str], t.Optional[str]]
"""
Run a command while intercepting invocations of Python to control the version used.
If the specified Python is an ansible-test managed virtual environment, it will be added to PATH to activate it.
Otherwise a temporary directory will be created to ensure the correct Python can be found in PATH.
"""
env = env.copy()
cmd = list(cmd)
inject_path = get_injector_path()
# make sure scripts (including injector.py) find the correct Python interpreter
if isinstance(python, VirtualPythonConfig):
python_path = os.path.dirname(python.path)
else:
python_path = get_python_path(python.path)
env['PATH'] = os.path.pathsep.join([inject_path, python_path, env['PATH']])
env['ANSIBLE_TEST_PYTHON_VERSION'] = python.version
env['ANSIBLE_TEST_PYTHON_INTERPRETER'] = python.path
return run_command(args, cmd, capture=capture, env=env, data=data, cwd=cwd, always=always)
def run_command(
args, # type: CommonConfig
cmd, # type: t.Iterable[str]
capture, # type: bool
env=None, # type: t.Optional[t.Dict[str, str]]
data=None, # type: t.Optional[str]
cwd=None, # type: t.Optional[str]
always=False, # type: bool
stdin=None, # type: t.Optional[t.IO[bytes]]
stdout=None, # type: t.Optional[t.IO[bytes]]
interactive=False, # type: bool
force_stdout=False, # type: bool
cmd_verbosity=1, # type: int
str_errors='strict', # type: str
error_callback=None, # type: t.Optional[t.Callable[[SubprocessError], None]]
): # type: (...) -> t.Tuple[t.Optional[str], t.Optional[str]]
"""Run the specified command and return stdout and stderr as a tuple."""
explain = args.explain and not always
return raw_command(cmd, capture=capture, env=env, data=data, cwd=cwd, explain=explain, stdin=stdin, stdout=stdout, interactive=interactive,
force_stdout=force_stdout, cmd_verbosity=cmd_verbosity, str_errors=str_errors, error_callback=error_callback)
def yamlcheck(python):
"""Return True if PyYAML has libyaml support, False if it does not and None if it was not found."""
result = json.loads(raw_command([python.path, os.path.join(ANSIBLE_TEST_TARGET_TOOLS_ROOT, 'yamlcheck.py')], capture=True)[0])
if not result['yaml']:
return None
return result['cloader']
def check_pyyaml(python, required=True, quiet=False): # type: (PythonConfig, bool, bool) -> t.Optional[bool]
"""
Return True if PyYAML has libyaml support, False if it does not and None if it was not found.
The result is cached if True or required.
"""
try:
return CHECK_YAML_VERSIONS[python.path]
except KeyError:
pass
state = yamlcheck(python)
if state is not None or required:
# results are cached only if pyyaml is required or present
# it is assumed that tests will not uninstall/re-install pyyaml -- if they do, those changes will go undetected
CHECK_YAML_VERSIONS[python.path] = state
if not quiet:
if state is None:
if required:
display.warning('PyYAML is not installed for interpreter: %s' % python.path)
elif not state:
display.warning('PyYAML will be slow due to installation without libyaml support for interpreter: %s' % python.path)
return state