ansible/test/runner/lib/util.py

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"""Miscellaneous utility functions and classes."""
from __future__ import absolute_import, print_function
import atexit
import contextlib
import errno
import filecmp
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', (), {})
DOCKER_COMPLETION = {}
coverage_path = '' # pylint: disable=locally-disabled, invalid-name
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 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.defpath)
if path:
path_dirs = path.split(os.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, capture=False, env=None, data=None, cwd=None, python_version=None, path=None):
"""
:type args: TestConfig
:type cmd: collections.Iterable[str]
:type target_name: str
:type capture: bool
:type env: dict[str, str] | None
:type data: str | None
:type cwd: str | None
:type python_version: str | None
:type path: str | None
:rtype: str | None, str | None
"""
if not env:
env = common_environment()
cmd = list(cmd)
inject_path = get_coverage_path(args)
config_path = os.path.join(inject_path, 'injector.json')
version = python_version or args.python_version
interpreter = find_python(version, path)
coverage_file = os.path.abspath(os.path.join(inject_path, '..', 'output', '%s=%s=%s=%s=coverage' % (
args.command, target_name, args.coverage_label or 'local-%s' % version, 'python-%s' % version)))
env['PATH'] = inject_path + os.pathsep + env['PATH']
env['ANSIBLE_TEST_PYTHON_VERSION'] = version
env['ANSIBLE_TEST_PYTHON_INTERPRETER'] = interpreter
AnsiballZ improvements Now that we don't need to worry about python-2.4 and 2.5, we can make some improvements to the way AnsiballZ handles modules. * Change AnsiballZ wrapper to use import to invoke the module We need the module to think of itself as a script because it could be coded as: main() or as: if __name__ == '__main__': main() Or even as: if __name__ == '__main__': random_function_name() A script will invoke all of those. Prior to this change, we invoked a second Python interpreter on the module so that it really was a script. However, this means that we have to run python twice (once for the AnsiballZ wrapper and once for the module). This change makes the module think that it is a script (because __name__ in the module == '__main__') but it's actually being invoked by us importing the module code. There's three ways we've come up to do this. * The most elegant is to use zipimporter and tell the import mechanism that the module being loaded is __main__: * https://github.com/abadger/ansible/blob/5959f11c9ddb7b6eaa9c3214560bd85e631d4055/lib/ansible/executor/module_common.py#L175 * zipimporter is nice because we do not have to extract the module from the zip file and save it to the disk when we do that. The import machinery does it all for us. * The drawback is that modules do not have a __file__ which points to a real file when they do this. Modules could be using __file__ to for a variety of reasons, most of those probably have replacements (the most common one is to find a writable directory for temporary files. AnsibleModule.tmpdir should be used instead) We can monkeypatch __file__ in fom AnsibleModule initialization but that's kind of gross. There's no way I can see to do this from the wrapper. * Next, there's imp.load_module(): * https://github.com/abadger/ansible/blob/340edf7489/lib/ansible/executor/module_common.py#L151 * imp has the nice property of allowing us to set __name__ to __main__ without changing the name of the file itself * We also don't have to do anything special to set __file__ for backwards compatibility (although the reason for that is the drawback): * Its drawback is that it requires the file to exist on disk so we have to explicitly extract it from the zipfile and save it to a temporary file * The last choice is to use exec to execute the module: * https://github.com/abadger/ansible/blob/f47a4ccc76/lib/ansible/executor/module_common.py#L175 * The code we would have to maintain for this looks pretty clean. In the wrapper we create a ModuleType, set __file__ on it, read the module's contents in from the zip file and then exec it. * Drawbacks: We still have to explicitly extract the file's contents from the zip archive instead of letting python's import mechanism handle it. * Exec also has hidden performance issues and breaks certain assumptions that modules could be making about their own code: http://lucumr.pocoo.org/2011/2/1/exec-in-python/ Our plan is to use imp.load_module() for now, deprecate the use of __file__ in modules, and switch to zipimport once the deprecation period for __file__ is over (without monkeypatching a fake __file__ in via AnsibleModule). * Rename the name of the AnsiBallZ wrapped module This makes it obvious that the wrapped module isn't the module file that we distribute. It's part of trying to mitigate the fact that the module is now named __main)).py in tracebacks. * Shield all wrapper symbols inside of a function With the new import code, all symbols in the wrapper become visible in the module. To mitigate the chance of collisions, move most symbols into a toplevel function. The only symbols left in the global namespace are now _ANSIBALLZ_WRAPPER and _ansiballz_main. revised porting guide entry Integrate code coverage collection into AnsiballZ. ci_coverage ci_complete
2018-06-20 18:23:59 +00:00
if args.coverage:
env['_ANSIBLE_COVERAGE_CONFIG'] = os.path.join(inject_path, '.coveragerc')
env['_ANSIBLE_COVERAGE_OUTPUT'] = coverage_file
config = dict(
python_interpreter=interpreter,
coverage_file=coverage_file if args.coverage else None,
)
if not args.explain:
with open(config_path, 'w') as config_fd:
json.dump(config, config_fd, indent=4, sort_keys=True)
return run_command(args, cmd, capture=capture, env=env, data=data, cwd=cwd)
def get_coverage_path(args):
"""
:type args: TestConfig
:rtype: str
"""
global coverage_path # pylint: disable=locally-disabled, global-statement, invalid-name
if coverage_path:
return os.path.join(coverage_path, 'coverage')
prefix = 'ansible-test-coverage-'
tmp_dir = '/tmp'
if args.explain:
return os.path.join(tmp_dir, '%stmp' % prefix, 'coverage')
src = os.path.abspath(os.path.join(os.getcwd(), 'test/runner/injector/'))
coverage_path = tempfile.mkdtemp('', prefix, dir=tmp_dir)
os.chmod(coverage_path, stat.S_IRWXU | stat.S_IRGRP | stat.S_IXGRP | stat.S_IROTH | stat.S_IXOTH)
shutil.copytree(src, os.path.join(coverage_path, 'coverage'))
shutil.copy('.coveragerc', os.path.join(coverage_path, 'coverage', '.coveragerc'))
for root, dir_names, file_names in os.walk(coverage_path):
for name in dir_names + file_names:
os.chmod(os.path.join(root, name), stat.S_IRWXU | stat.S_IRGRP | stat.S_IXGRP | stat.S_IROTH | stat.S_IXOTH)
for directory in 'output', 'logs':
os.mkdir(os.path.join(coverage_path, directory))
os.chmod(os.path.join(coverage_path, directory), stat.S_IRWXU | stat.S_IRWXG | stat.S_IRWXO)
atexit.register(cleanup_coverage_dir)
return os.path.join(coverage_path, 'coverage')
def cleanup_coverage_dir():
"""Copy over coverage data from temporary directory and purge temporary directory."""
output_dir = os.path.join(coverage_path, 'output')
for filename in os.listdir(output_dir):
src = os.path.join(output_dir, filename)
dst = os.path.join(os.getcwd(), 'test', 'results', 'coverage')
shutil.copy(src, dst)
logs_dir = os.path.join(coverage_path, 'logs')
for filename in os.listdir(logs_dir):
random_suffix = ''.join(random.choice(string.ascii_letters + string.digits) for _ in range(8))
new_name = '%s.%s.log' % (os.path.splitext(os.path.basename(filename))[0], random_suffix)
src = os.path.join(logs_dir, filename)
dst = os.path.join(os.getcwd(), 'test', 'results', 'logs', new_name)
shutil.copy(src, dst)
shutil.rmtree(coverage_path)
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
2017-07-28 23:17:56 +00:00
: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
2017-07-28 23:17:56 +00:00
: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()
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
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.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',
'.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):
"""
:type args: any
"""
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
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 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