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ansible/test/runner/lib/util.py

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24 KiB
Python

"""Miscellaneous utility functions and classes."""
from __future__ import absolute_import, print_function
import atexit
import contextlib
import errno
import fcntl
import inspect
import json
import os
import pipes
import pkgutil
import random
import re
import shutil
import socket
import stat
import string
import subprocess
import sys
import tempfile
import time
from struct import unpack, pack
from termios import TIOCGWINSZ
try:
from abc import ABC
except ImportError:
from abc import ABCMeta
ABC = ABCMeta('ABC', (), {})
try:
# noinspection PyCompatibility
from ConfigParser import SafeConfigParser as ConfigParser
except ImportError:
# noinspection PyCompatibility
from configparser import ConfigParser
DOCKER_COMPLETION = {}
PYTHON_PATHS = {} # type: dict[str, str]
try:
MAXFD = subprocess.MAXFD
except AttributeError:
MAXFD = -1
COVERAGE_CONFIG_PATH = '.coveragerc'
COVERAGE_OUTPUT_PATH = 'coverage'
# Modes are set to allow all users the same level of access.
# This permits files to be used in tests that change users.
# The only exception is write access to directories for the user creating them.
# This avoids having to modify the directory permissions a second time.
MODE_READ = stat.S_IRUSR | stat.S_IRGRP | stat.S_IROTH
MODE_FILE = MODE_READ
MODE_FILE_EXECUTE = MODE_FILE | stat.S_IXUSR | stat.S_IXGRP | stat.S_IXOTH
MODE_FILE_WRITE = MODE_FILE | stat.S_IWUSR | stat.S_IWGRP | stat.S_IWOTH
MODE_DIRECTORY = MODE_READ | stat.S_IWUSR | stat.S_IXUSR | stat.S_IXGRP | stat.S_IXOTH
MODE_DIRECTORY_WRITE = MODE_DIRECTORY | stat.S_IWGRP | stat.S_IWOTH
def get_docker_completion():
"""
:rtype: dict[str, str]
"""
if not DOCKER_COMPLETION:
images = read_lines_without_comments('test/runner/completion/docker.txt', remove_blank_lines=True)
DOCKER_COMPLETION.update(dict(kvp for kvp in [parse_docker_completion(i) for i in images] if kvp))
return DOCKER_COMPLETION
def parse_docker_completion(value):
"""
:type value: str
:rtype: tuple[str, dict[str, str]]
"""
values = value.split()
if not values:
return None
name = values[0]
data = dict((kvp[0], kvp[1] if len(kvp) > 1 else '') for kvp in [item.split('=', 1) for item in values[1:]])
return name, data
def is_shippable():
"""
:rtype: bool
"""
return os.environ.get('SHIPPABLE') == 'true'
def remove_file(path):
"""
:type path: str
"""
if os.path.isfile(path):
os.remove(path)
def read_lines_without_comments(path, remove_blank_lines=False):
"""
:type path: str
:type remove_blank_lines: bool
:rtype: list[str]
"""
with open(path, 'r') as path_fd:
lines = path_fd.read().splitlines()
lines = [re.sub(r' *#.*$', '', line) for line in lines]
if remove_blank_lines:
lines = [line for line in lines if line]
return lines
def get_python_path(args, interpreter):
"""
:type args: TestConfig
:type interpreter: str
:rtype: str
"""
python_path = PYTHON_PATHS.get(interpreter)
if python_path:
return python_path
prefix = 'python-'
suffix = '-ansible'
root_temp_dir = '/tmp'
if args.explain:
return os.path.join(root_temp_dir, ''.join((prefix, 'temp', suffix)))
python_path = tempfile.mkdtemp(prefix=prefix, suffix=suffix, dir=root_temp_dir)
os.chmod(python_path, MODE_DIRECTORY)
os.symlink(interpreter, os.path.join(python_path, 'python'))
if not PYTHON_PATHS:
atexit.register(cleanup_python_paths)
PYTHON_PATHS[interpreter] = python_path
return python_path
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)
shutil.rmtree(path)
def get_coverage_environment(args, target_name, version, temp_path, module_coverage):
"""
:type args: TestConfig
:type target_name: str
:type version: str
:type temp_path: str
:type module_coverage: bool
:rtype: dict[str, str]
"""
if temp_path:
# integration tests (both localhost and the optional testhost)
# config and results are in a temporary directory
coverage_config_base_path = temp_path
coverage_output_base_path = temp_path
else:
# unit tests, sanity tests and other special cases (localhost only)
# config and results are in the source tree
coverage_config_base_path = os.getcwd()
coverage_output_base_path = os.path.abspath(os.path.join('test/results'))
config_file = os.path.join(coverage_config_base_path, COVERAGE_CONFIG_PATH)
coverage_file = os.path.join(coverage_output_base_path, COVERAGE_OUTPUT_PATH, '%s=%s=%s=%s=coverage' % (
args.command, target_name, args.coverage_label or 'local-%s' % version, 'python-%s' % version))
if args.coverage_check:
# cause the 'coverage' module to be found, but not imported or enabled
coverage_file = ''
# Enable code coverage collection on local Python programs (this does not include Ansible modules).
# Used by the injectors in test/runner/injector/ to support code coverage.
# Used by unit tests in test/units/conftest.py to support code coverage.
# The COVERAGE_FILE variable is also used directly by the 'coverage' module.
env = dict(
COVERAGE_CONF=config_file,
COVERAGE_FILE=coverage_file,
)
if module_coverage:
# Enable code coverage collection on Ansible modules (both local and remote).
# Used by the AnsiballZ wrapper generator in lib/ansible/executor/module_common.py to support code coverage.
env.update(dict(
_ANSIBLE_COVERAGE_CONFIG=config_file,
_ANSIBLE_COVERAGE_OUTPUT=coverage_file,
))
return env
def find_executable(executable, cwd=None, path=None, required=True):
"""
:type executable: str
:type cwd: str
:type path: str
:type required: bool | str
:rtype: str | None
"""
match = None
real_cwd = os.getcwd()
if not cwd:
cwd = real_cwd
if os.path.dirname(executable):
target = os.path.join(cwd, executable)
if os.path.exists(target) and os.access(target, os.F_OK | os.X_OK):
match = executable
else:
if path is None:
path = os.environ.get('PATH', os.path.defpath)
if path:
path_dirs = path.split(os.path.pathsep)
seen_dirs = set()
for path_dir in path_dirs:
if path_dir in seen_dirs:
continue
seen_dirs.add(path_dir)
if os.path.abspath(path_dir) == real_cwd:
path_dir = cwd
candidate = os.path.join(path_dir, executable)
if os.path.exists(candidate) and os.access(candidate, os.F_OK | os.X_OK):
match = candidate
break
if not match and required:
message = 'Required program "%s" not found.' % executable
if required != 'warning':
raise ApplicationError(message)
display.warning(message)
return match
def find_python(version, path=None):
"""
:type version: str
:type path: str | None
:rtype: str
"""
version_info = tuple(int(n) for n in version.split('.'))
if not path and version_info == sys.version_info[:len(version_info)]:
python_bin = sys.executable
else:
python_bin = find_executable('python%s' % version, path=path)
return python_bin
def generate_pip_command(python):
"""
:type python: str
:rtype: list[str]
"""
return [python, '-m', 'pip.__main__']
def intercept_command(args, cmd, target_name, env, capture=False, data=None, cwd=None, python_version=None, temp_path=None, module_coverage=True,
virtualenv=None):
"""
:type args: TestConfig
:type cmd: collections.Iterable[str]
:type target_name: str
:type env: dict[str, str]
:type capture: bool
:type data: str | None
:type cwd: str | None
:type python_version: str | None
:type temp_path: str | None
:type module_coverage: bool
:type virtualenv: str | None
:rtype: str | None, str | None
"""
if not env:
env = common_environment()
cmd = list(cmd)
version = python_version or args.python_version
interpreter = virtualenv or find_python(version)
inject_path = os.path.abspath('test/runner/injector')
if not virtualenv:
# injection of python into the path is required when not activating a virtualenv
# otherwise scripts may find the wrong interpreter or possibly no interpreter
python_path = get_python_path(args, interpreter)
inject_path = python_path + os.path.pathsep + inject_path
env['PATH'] = inject_path + os.path.pathsep + env['PATH']
env['ANSIBLE_TEST_PYTHON_VERSION'] = version
env['ANSIBLE_TEST_PYTHON_INTERPRETER'] = interpreter
if args.coverage:
# add the necessary environment variables to enable code coverage collection
env.update(get_coverage_environment(args, target_name, version, temp_path, module_coverage))
return run_command(args, cmd, capture=capture, env=env, data=data, cwd=cwd)
def run_command(args, cmd, capture=False, env=None, data=None, cwd=None, always=False, stdin=None, stdout=None,
cmd_verbosity=1, str_errors='strict'):
"""
:type args: CommonConfig
:type cmd: collections.Iterable[str]
:type capture: bool
:type env: dict[str, str] | None
:type data: str | None
:type cwd: str | None
:type always: bool
:type stdin: file | None
:type stdout: file | None
:type cmd_verbosity: int
:type str_errors: str
:rtype: str | None, str | None
"""
explain = args.explain and not always
return raw_command(cmd, capture=capture, env=env, data=data, cwd=cwd, explain=explain, stdin=stdin, stdout=stdout,
cmd_verbosity=cmd_verbosity, str_errors=str_errors)
def raw_command(cmd, capture=False, env=None, data=None, cwd=None, explain=False, stdin=None, stdout=None,
cmd_verbosity=1, str_errors='strict'):
"""
:type cmd: collections.Iterable[str]
:type capture: bool
:type env: dict[str, str] | None
:type data: str | None
:type cwd: str | None
:type explain: bool
:type stdin: file | None
:type stdout: file | None
:type cmd_verbosity: int
:type str_errors: str
:rtype: str | None, str | None
"""
if not cwd:
cwd = os.getcwd()
if not env:
env = common_environment()
cmd = list(cmd)
escaped_cmd = ' '.join(pipes.quote(c) for c in cmd)
display.info('Run command: %s' % escaped_cmd, verbosity=cmd_verbosity, truncate=True)
display.info('Working directory: %s' % cwd, verbosity=2)
program = find_executable(cmd[0], cwd=cwd, path=env['PATH'], required='warning')
if program:
display.info('Program found: %s' % program, verbosity=2)
for key in sorted(env.keys()):
display.info('%s=%s' % (key, env[key]), verbosity=2)
if explain:
return None, None
communicate = False
if stdin is not None:
data = None
communicate = True
elif data is not None:
stdin = subprocess.PIPE
communicate = True
if stdout:
communicate = True
if capture:
stdout = stdout or subprocess.PIPE
stderr = subprocess.PIPE
communicate = True
else:
stderr = None
start = time.time()
process = None
try:
try:
process = subprocess.Popen(cmd, env=env, stdin=stdin, stdout=stdout, stderr=stderr, cwd=cwd)
except OSError as ex:
if ex.errno == errno.ENOENT:
raise ApplicationError('Required program "%s" not found.' % cmd[0])
raise
if communicate:
encoding = 'utf-8'
data_bytes = data.encode(encoding, 'surrogateescape') if data else None
stdout_bytes, stderr_bytes = process.communicate(data_bytes)
stdout_text = stdout_bytes.decode(encoding, str_errors) if stdout_bytes else u''
stderr_text = stderr_bytes.decode(encoding, str_errors) if stderr_bytes else u''
else:
process.wait()
stdout_text, stderr_text = None, None
finally:
if process and process.returncode is None:
process.kill()
display.info('') # the process we're interrupting may have completed a partial line of output
display.notice('Killed command to avoid an orphaned child process during handling of an unexpected exception.')
status = process.returncode
runtime = time.time() - start
display.info('Command exited with status %s after %s seconds.' % (status, runtime), verbosity=4)
if status == 0:
return stdout_text, stderr_text
raise SubprocessError(cmd, status, stdout_text, stderr_text, runtime)
def common_environment():
"""Common environment used for executing all programs."""
env = dict(
LC_ALL='en_US.UTF-8',
PATH=os.environ.get('PATH', os.path.defpath),
)
required = (
'HOME',
)
optional = (
'HTTPTESTER',
'LD_LIBRARY_PATH',
'SSH_AUTH_SOCK',
# MacOS High Sierra Compatibility
# http://sealiesoftware.com/blog/archive/2017/6/5/Objective-C_and_fork_in_macOS_1013.html
'OBJC_DISABLE_INITIALIZE_FORK_SAFETY',
'ANSIBLE_KEEP_REMOTE_FILES',
)
env.update(pass_vars(required=required, optional=optional))
return env
def pass_vars(required, optional):
"""
:type required: collections.Iterable[str]
:type optional: collections.Iterable[str]
:rtype: dict[str, str]
"""
env = {}
for name in required:
if name not in os.environ:
raise MissingEnvironmentVariable(name)
env[name] = os.environ[name]
for name in optional:
if name not in os.environ:
continue
env[name] = os.environ[name]
return env
def deepest_path(path_a, path_b):
"""Return the deepest of two paths, or None if the paths are unrelated.
:type path_a: str
:type path_b: str
:rtype: str | None
"""
if path_a == '.':
path_a = ''
if path_b == '.':
path_b = ''
if path_a.startswith(path_b):
return path_a or '.'
if path_b.startswith(path_a):
return path_b or '.'
return None
def remove_tree(path):
"""
:type path: str
"""
try:
shutil.rmtree(path)
except OSError as ex:
if ex.errno != errno.ENOENT:
raise
def make_dirs(path):
"""
:type path: str
"""
try:
os.makedirs(path)
except OSError as ex:
if ex.errno != errno.EEXIST:
raise
def is_binary_file(path):
"""
:type path: str
:rtype: bool
"""
assume_text = set([
'.cfg',
'.conf',
'.crt',
'.cs',
'.css',
'.html',
'.ini',
'.j2',
'.js',
'.json',
'.md',
'.pem',
'.ps1',
'.psm1',
'.py',
'.rst',
'.sh',
'.txt',
'.xml',
'.yaml',
'.yml',
])
assume_binary = set([
'.bin',
'.eot',
'.gz',
'.ico',
'.iso',
'.jpg',
'.otf',
'.p12',
'.png',
'.pyc',
'.rpm',
'.ttf',
'.woff',
'.woff2',
'.zip',
])
ext = os.path.splitext(path)[1]
if ext in assume_text:
return False
if ext in assume_binary:
return True
with open(path, 'rb') as path_fd:
return b'\0' in path_fd.read(1024)
def generate_password():
"""Generate a random password.
:rtype: str
"""
chars = [
string.ascii_letters,
string.digits,
string.ascii_letters,
string.digits,
'-',
] * 4
password = ''.join([random.choice(char) for char in chars[:-1]])
display.sensitive.add(password)
return password
class Display(object):
"""Manages color console output."""
clear = '\033[0m'
red = '\033[31m'
green = '\033[32m'
yellow = '\033[33m'
blue = '\033[34m'
purple = '\033[35m'
cyan = '\033[36m'
verbosity_colors = {
0: None,
1: green,
2: blue,
3: cyan,
}
def __init__(self):
self.verbosity = 0
self.color = True
self.warnings = []
self.warnings_unique = set()
self.info_stderr = False
self.rows = 0
self.columns = 0
self.truncate = 0
self.redact = False
self.sensitive = set()
if os.isatty(0):
self.rows, self.columns = unpack('HHHH', fcntl.ioctl(0, TIOCGWINSZ, pack('HHHH', 0, 0, 0, 0)))[:2]
def __warning(self, message):
"""
:type message: str
"""
self.print_message('WARNING: %s' % message, color=self.purple, fd=sys.stderr)
def review_warnings(self):
"""Review all warnings which previously occurred."""
if not self.warnings:
return
self.__warning('Reviewing previous %d warning(s):' % len(self.warnings))
for warning in self.warnings:
self.__warning(warning)
def warning(self, message, unique=False):
"""
:type message: str
:type unique: bool
"""
if unique:
if message in self.warnings_unique:
return
self.warnings_unique.add(message)
self.__warning(message)
self.warnings.append(message)
def notice(self, message):
"""
:type message: str
"""
self.print_message('NOTICE: %s' % message, color=self.purple, fd=sys.stderr)
def error(self, message):
"""
:type message: str
"""
self.print_message('ERROR: %s' % message, color=self.red, fd=sys.stderr)
def info(self, message, verbosity=0, truncate=False):
"""
:type message: str
:type verbosity: int
:type truncate: bool
"""
if self.verbosity >= verbosity:
color = self.verbosity_colors.get(verbosity, self.yellow)
self.print_message(message, color=color, fd=sys.stderr if self.info_stderr else sys.stdout, truncate=truncate)
def print_message(self, message, color=None, fd=sys.stdout, truncate=False): # pylint: disable=locally-disabled, invalid-name
"""
:type message: str
:type color: str | None
:type fd: file
:type truncate: bool
"""
if self.redact and self.sensitive:
for item in self.sensitive:
message = message.replace(item, '*' * len(item))
if truncate:
if len(message) > self.truncate > 5:
message = message[:self.truncate - 5] + ' ...'
if color and self.color:
# convert color resets in message to desired color
message = message.replace(self.clear, color)
message = '%s%s%s' % (color, message, self.clear)
if sys.version_info[0] == 2 and isinstance(message, type(u'')):
message = message.encode('utf-8')
print(message, file=fd)
fd.flush()
class ApplicationError(Exception):
"""General application error."""
pass
class ApplicationWarning(Exception):
"""General application warning which interrupts normal program flow."""
pass
class SubprocessError(ApplicationError):
"""Error resulting from failed subprocess execution."""
def __init__(self, cmd, status=0, stdout=None, stderr=None, runtime=None):
"""
:type cmd: list[str]
:type status: int
:type stdout: str | None
:type stderr: str | None
:type runtime: float | None
"""
message = 'Command "%s" returned exit status %s.\n' % (' '.join(pipes.quote(c) for c in cmd), status)
if stderr:
message += '>>> Standard Error\n'
message += '%s%s\n' % (stderr.strip(), Display.clear)
if stdout:
message += '>>> Standard Output\n'
message += '%s%s\n' % (stdout.strip(), Display.clear)
message = message.strip()
super(SubprocessError, self).__init__(message)
self.cmd = cmd
self.status = status
self.stdout = stdout
self.stderr = stderr
self.runtime = runtime
class MissingEnvironmentVariable(ApplicationError):
"""Error caused by missing environment variable."""
def __init__(self, name):
"""
:type name: str
"""
super(MissingEnvironmentVariable, self).__init__('Missing environment variable: %s' % name)
self.name = name
class CommonConfig(object):
"""Configuration common to all commands."""
def __init__(self, args, command):
"""
:type args: any
:type command: str
"""
self.command = command
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
if is_shippable():
self.redact = True
self.cache = {}
def docker_qualify_image(name):
"""
:type name: str
:rtype: str
"""
config = get_docker_completion().get(name, {})
return config.get('name', name)
@contextlib.contextmanager
def named_temporary_file(args, prefix, suffix, directory, content):
"""
:param args: CommonConfig
:param prefix: str
:param suffix: str
:param directory: str
:param content: str | bytes | unicode
:rtype: str
"""
if not isinstance(content, bytes):
content = content.encode('utf-8')
if args.explain:
yield os.path.join(directory, '%stemp%s' % (prefix, suffix))
else:
with tempfile.NamedTemporaryFile(prefix=prefix, suffix=suffix, dir=directory) as tempfile_fd:
tempfile_fd.write(content)
tempfile_fd.flush()
yield tempfile_fd.name
def parse_to_list_of_dict(pattern, value):
"""
:type pattern: str
:type value: str
:return: list[dict[str, str]]
"""
matched = []
unmatched = []
for line in value.splitlines():
match = re.search(pattern, line)
if match:
matched.append(match.groupdict())
else:
unmatched.append(line)
if unmatched:
raise Exception('Pattern "%s" did not match values:\n%s' % (pattern, '\n'.join(unmatched)))
return matched
def get_available_port():
"""
:rtype: int
"""
# this relies on the kernel not reusing previously assigned ports immediately
socket_fd = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
with contextlib.closing(socket_fd):
socket_fd.bind(('', 0))
return socket_fd.getsockname()[1]
def get_subclasses(class_type):
"""
:type class_type: type
:rtype: set[str]
"""
subclasses = set()
queue = [class_type]
while queue:
parent = queue.pop()
for child in parent.__subclasses__():
if child not in subclasses:
if not inspect.isabstract(child):
subclasses.add(child)
queue.append(child)
return subclasses
def import_plugins(directory):
"""
:type directory: str
"""
path = os.path.join(os.path.dirname(__file__), directory)
prefix = 'lib.%s.' % directory
for (_, name, _) in pkgutil.iter_modules([path], prefix=prefix):
__import__(name)
def load_plugins(base_type, database):
"""
:type base_type: type
:type database: dict[str, type]
"""
plugins = dict((sc.__module__.split('.')[2], sc) for sc in get_subclasses(base_type)) # type: dict [str, type]
for plugin in plugins:
database[plugin] = plugins[plugin]
display = Display() # pylint: disable=locally-disabled, invalid-name