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

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"""Miscellaneous utility functions and classes."""
from __future__ import (absolute_import, division, print_function)
__metaclass__ = type
import contextlib
import errno
import fcntl
import inspect
import os
import pkgutil
import random
import re
import shutil
import socket
import stat
import string
import subprocess
import sys
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 ConfigParser
except ImportError:
# noinspection PyCompatibility,PyUnresolvedReferences
from ConfigParser import SafeConfigParser as ConfigParser
try:
# noinspection PyProtectedMember
from shlex import quote as cmd_quote
except ImportError:
# noinspection PyProtectedMember
from pipes import quote as cmd_quote
from . import types as t
try:
C = t.TypeVar('C')
except AttributeError:
C = None
DOCKER_COMPLETION = {} # type: t.Dict[str, t.Dict[str, str]]
REMOTE_COMPLETION = {} # type: t.Dict[str, t.Dict[str, str]]
PYTHON_PATHS = {} # type: t.Dict[str, str]
try:
# noinspection PyUnresolvedReferences
MAXFD = subprocess.MAXFD
except AttributeError:
MAXFD = -1
COVERAGE_CONFIG_PATH = '.coveragerc'
COVERAGE_OUTPUT_PATH = 'coverage'
ANSIBLE_ROOT = os.path.dirname(os.path.dirname(os.path.dirname(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))))
ANSIBLE_TEST_ROOT = os.path.join(ANSIBLE_ROOT, 'test', 'lib', 'ansible_test')
ANSIBLE_TEST_DATA_ROOT = os.path.join(ANSIBLE_TEST_ROOT, '_data')
# 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
ENCODING = 'utf-8'
Text = type(u'')
def to_optional_bytes(value, errors='strict'): # type: (t.Optional[t.AnyStr], str) -> t.Optional[bytes]
"""Return the given value as bytes encoded using UTF-8 if not already bytes, or None if the value is None."""
return None if value is None else to_bytes(value, errors)
def to_optional_text(value, errors='strict'): # type: (t.Optional[t.AnyStr], str) -> t.Optional[t.Text]
"""Return the given value as text decoded using UTF-8 if not already text, or None if the value is None."""
return None if value is None else to_text(value, errors)
def to_bytes(value, errors='strict'): # type: (t.AnyStr, str) -> bytes
"""Return the given value as bytes encoded using UTF-8 if not already bytes."""
if isinstance(value, bytes):
return value
if isinstance(value, Text):
return value.encode(ENCODING, errors)
raise Exception('value is not bytes or text: %s' % type(value))
def to_text(value, errors='strict'): # type: (t.AnyStr, str) -> t.Text
"""Return the given value as text decoded using UTF-8 if not already text."""
if isinstance(value, bytes):
return value.decode(ENCODING, errors)
if isinstance(value, Text):
return value
raise Exception('value is not bytes or text: %s' % type(value))
def get_docker_completion():
"""
:rtype: dict[str, dict[str, str]]
"""
return get_parameterized_completion(DOCKER_COMPLETION, 'docker')
def get_remote_completion():
"""
:rtype: dict[str, dict[str, str]]
"""
return get_parameterized_completion(REMOTE_COMPLETION, 'remote')
def get_parameterized_completion(cache, name):
"""
:type cache: dict[str, dict[str, str]]
:type name: str
:rtype: dict[str, dict[str, str]]
"""
if not cache:
images = read_lines_without_comments(os.path.join(ANSIBLE_TEST_DATA_ROOT, 'completion', '%s.txt' % name), remove_blank_lines=True)
cache.update(dict(kvp for kvp in [parse_parameterized_completion(i) for i in images] if kvp))
return cache
def parse_parameterized_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, optional=False): # type: (str, bool, bool) -> t.List[str]
"""
Returns lines from the specified text file with comments removed.
Comments are any content from a hash symbol to the end of a line.
Any spaces immediately before a comment are also removed.
"""
if optional and not os.path.exists(path):
return []
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 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, required=True):
"""
:type version: str
:type path: str | None
:type required: bool
: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, required=required)
return python_bin
def get_available_python_versions(versions): # type: (t.List[str]) -> t.Tuple[str, ...]
"""Return a tuple indicating which of the requested Python versions are available."""
return tuple(python_version for python_version in versions if find_python(python_version, required=False))
def generate_pip_command(python):
"""
:type python: str
:rtype: list[str]
"""
return [python, '-m', 'pip.__main__']
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
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: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(cmd_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:
cmd_bytes = [to_bytes(c) for c in cmd]
env_bytes = dict((to_bytes(k), to_bytes(v)) for k, v in env.items())
process = subprocess.Popen(cmd_bytes, env=env_bytes, 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:
data_bytes = to_optional_bytes(data)
stdout_bytes, stderr_bytes = process.communicate(data_bytes)
stdout_text = to_optional_text(stdout_bytes, str_errors) or u''
stderr_text = to_optional_text(stderr_bytes, str_errors) or 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
# Example configuration for macOS:
# export OBJC_DISABLE_INITIALIZE_FORK_SAFETY=YES
'OBJC_DISABLE_INITIALIZE_FORK_SAFETY',
'ANSIBLE_KEEP_REMOTE_FILES',
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# MacOS Homebrew Compatibility
# https://cryptography.io/en/latest/installation/#building-cryptography-on-macos
# This may also be required to install pyyaml with libyaml support when installed in non-standard locations.
# Example configuration for brew on macOS:
# export LDFLAGS="-L$(brew --prefix openssl)/lib/ -L$(brew --prefix libyaml)/lib/"
# export CFLAGS="-I$(brew --prefix openssl)/include/ -I$(brew --prefix libyaml)/include/"
# However, this is not adequate for PyYAML 3.13, which is the latest version supported on Python 2.6.
# For that version the standard location must be used, or `pip install` must be invoked with additional options:
# --global-option=build_ext --global-option=-L{path_to_lib_dir}
'LDFLAGS',
'CFLAGS',
)
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(to_bytes(path))
except OSError as ex:
if ex.errno != errno.ENOENT:
raise
def make_dirs(path):
"""
:type path: str
"""
try:
os.makedirs(to_bytes(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:
"""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 = sys.stdout.isatty()
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:
message = to_bytes(message)
print(message, file=fd)
fd.flush()
class ApplicationError(Exception):
"""General application error."""
class ApplicationWarning(Exception):
"""General application warning which interrupts normal program flow."""
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(cmd_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
def docker_qualify_image(name):
"""
:type name: str
:rtype: str
"""
config = get_docker_completion().get(name, {})
return config.get('name', 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: (t.Type[C]) -> t.Set[t.Type[C]]
"""Returns the set of types that are concrete subclasses of the given type."""
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 is_subdir(candidate_path, path): # type: (str, str) -> bool
"""Returns true if candidate_path is path or a subdirectory of path."""
if not path.endswith(os.sep):
path += os.sep
if not candidate_path.endswith(os.sep):
candidate_path += os.sep
return candidate_path.startswith(path)
def paths_to_dirs(paths): # type: (t.List[str]) -> t.List[str]
"""Returns a list of directories extracted from the given list of paths."""
dir_names = set()
for path in paths:
while True:
path = os.path.dirname(path)
if not path or path == os.path.sep:
break
dir_names.add(path + os.path.sep)
return sorted(dir_names)
def import_plugins(directory, root=None): # type: (str, t.Optional[str]) -> None
"""
Import plugins from the given directory relative to the given root.
If the root is not provided, the 'lib' directory for the test runner will be used.
"""
if root is None:
root = os.path.dirname(__file__)
path = os.path.join(root, directory)
package = __name__.rsplit('.', 1)[0]
prefix = '%s.%s.' % (package, directory.replace(os.sep, '.'))
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for (_module_loader, name, _ispkg) in pkgutil.iter_modules([path], prefix=prefix):
module_path = os.path.join(root, name[len(package) + 1:].replace('.', os.sep) + '.py')
load_module(module_path, name)
def load_plugins(base_type, database): # type: (t.Type[C], t.Dict[str, t.Type[C]]) -> None
"""
Load plugins of the specified type and track them in the specified database.
Only plugins which have already been imported will be loaded.
"""
plugins = dict((sc.__module__.rsplit('.', 1)[1], sc) for sc in get_subclasses(base_type)) # type: t.Dict[str, t.Type[C]]
for plugin in plugins:
database[plugin] = plugins[plugin]
def load_module(path, name): # type: (str, str) -> None
"""Load a Python module using the given name and path."""
if name in sys.modules:
return
if sys.version_info >= (3, 4):
# noinspection PyUnresolvedReferences
import importlib.util
# noinspection PyUnresolvedReferences
spec = importlib.util.spec_from_file_location(name, path)
# noinspection PyUnresolvedReferences
module = importlib.util.module_from_spec(spec)
spec.loader.exec_module(module)
sys.modules[name] = module
else:
# noinspection PyDeprecation
import imp
with open(path, 'r') as module_file:
# noinspection PyDeprecation
imp.load_module(name, module_file, path, ('.py', 'r', imp.PY_SOURCE))
display = Display() # pylint: disable=locally-disabled, invalid-name