ansible/test/runner/injector/injector.py

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#!/usr/bin/env python
"""Interpreter and code coverage injector for use with ansible-test.
The injector serves two main purposes:
1) Control the python interpreter used to run test tools and ansible code.
2) Provide optional code coverage analysis of ansible code.
The injector is executed one of two ways:
1) On the controller via a symbolic link such as ansible or pytest.
This is accomplished by prepending the injector directory to the PATH by ansible-test.
2) As the python interpreter when running ansible modules.
This is only supported when connecting to the local host.
Otherwise set the ANSIBLE_TEST_REMOTE_INTERPRETER environment variable.
It can be empty to auto-detect the python interpreter on the remote host.
If not empty it will be used to set ansible_python_interpreter.
NOTE: Running ansible-test with the --tox option or inside a virtual environment
may prevent the injector from working for tests which use connection
types other than local, or which use become, due to lack of permissions
to access the interpreter for the virtual environment.
"""
from __future__ import absolute_import, print_function
import errno
import json
import os
import sys
import pipes
import logging
import getpass
logger = logging.getLogger('injector') # pylint: disable=locally-disabled, invalid-name
# pylint: disable=locally-disabled, invalid-name
config = None # type: InjectorConfig
class InjectorConfig(object):
"""Mandatory configuration."""
def __init__(self, config_path):
"""Initialize config."""
with open(config_path) as config_fd:
_config = json.load(config_fd)
self.python_interpreter = _config['python_interpreter']
self.coverage_file = _config['coverage_file']
# Read from the environment instead of config since it needs to be changed by integration test scripts.
# It also does not need to flow from the controller to the remote. It is only used on the controller.
self.remote_interpreter = os.environ.get('ANSIBLE_TEST_REMOTE_INTERPRETER', None)
self.arguments = [to_text(c) for c in sys.argv]
def to_text(value):
"""
:type value: str | None
:rtype: str | None
"""
if value is None:
return None
if isinstance(value, bytes):
return value.decode('utf-8')
return u'%s' % value
def main():
"""Main entry point."""
global config # pylint: disable=locally-disabled, global-statement
formatter = logging.Formatter('%(asctime)s %(process)d %(levelname)s %(message)s')
log_name = 'ansible-test-coverage.%s.log' % getpass.getuser()
self_dir = os.path.dirname(os.path.abspath(__file__))
handler = logging.FileHandler(os.path.join('/tmp', log_name))
handler.setFormatter(formatter)
logger.addHandler(handler)
handler = logging.FileHandler(os.path.abspath(os.path.join(self_dir, '..', 'logs', log_name)))
handler.setFormatter(formatter)
logger.addHandler(handler)
logger.setLevel(logging.DEBUG)
try:
logger.debug('Self: %s', __file__)
config_path = os.path.join(os.path.dirname(os.path.abspath(__file__)), 'injector.json')
try:
config = InjectorConfig(config_path)
except IOError:
logger.exception('Error reading config: %s', config_path)
exit('No injector config found. Set ANSIBLE_TEST_REMOTE_INTERPRETER if the test is not connecting to the local host.')
logger.debug('Arguments: %s', ' '.join(pipes.quote(c) for c in config.arguments))
logger.debug('Python interpreter: %s', config.python_interpreter)
logger.debug('Remote interpreter: %s', config.remote_interpreter)
logger.debug('Coverage file: %s', config.coverage_file)
require_cwd = False
if os.path.basename(__file__) == 'injector.py':
if config.coverage_file:
args, env, require_cwd = cover()
else:
args, env = runner()
else:
args, env = injector()
logger.debug('Run command: %s', ' '.join(pipes.quote(c) for c in args))
altered_cwd = False
try:
cwd = os.getcwd()
except OSError as ex:
# some platforms, such as macOS, may not allow querying the working directory when using become to drop privileges
if ex.errno != errno.EACCES:
raise
if require_cwd:
# make sure the program we execute can determine the working directory if it's required
cwd = '/'
os.chdir(cwd)
altered_cwd = True
else:
cwd = None
logger.debug('Working directory: %s%s', cwd or '?', ' (altered)' if altered_cwd else '')
for key in sorted(env.keys()):
logger.debug('%s=%s', key, env[key])
os.execvpe(args[0], args, env)
except Exception as ex:
logger.fatal(ex)
raise
def injector():
"""
:rtype: list[str], dict[str, str]
"""
command = os.path.basename(__file__)
executable = find_executable(command)
if config.coverage_file:
args, env = coverage_command()
else:
args, env = [config.python_interpreter], os.environ.copy()
args += [executable]
if command in ('ansible', 'ansible-playbook', 'ansible-pull'):
if config.remote_interpreter is None:
interpreter = os.path.join(os.path.dirname(__file__), 'injector.py')
elif config.remote_interpreter == '':
interpreter = None
else:
interpreter = config.remote_interpreter
if interpreter:
args += ['--extra-vars', 'ansible_python_interpreter=' + interpreter]
args += config.arguments[1:]
return args, env
def runner():
"""
:rtype: list[str], dict[str, str]
"""
args, env = [config.python_interpreter], os.environ.copy()
args += config.arguments[1:]
return args, env
def cover():
"""
:rtype: list[str], dict[str, str], bool
"""
if len(config.arguments) > 1:
executable = config.arguments[1]
else:
executable = ''
require_cwd = False
if os.path.basename(executable).startswith('ansible_module_'):
args, env = coverage_command()
# coverage requires knowing the working directory
require_cwd = True
else:
args, env = [config.python_interpreter], os.environ.copy()
args += config.arguments[1:]
return args, env, require_cwd
def coverage_command():
"""
:rtype: list[str], dict[str, str]
"""
self_dir = os.path.dirname(os.path.abspath(__file__))
args = [
config.python_interpreter,
'-m',
'coverage.__main__',
'run',
'--rcfile',
os.path.join(self_dir, '.coveragerc'),
]
env = os.environ.copy()
env['COVERAGE_FILE'] = config.coverage_file
return args, env
def find_executable(executable):
"""
:type executable: str
:rtype: str
"""
self = os.path.abspath(__file__)
path = os.environ.get('PATH', os.defpath)
seen_dirs = set()
for path_dir in path.split(os.pathsep):
if path_dir in seen_dirs:
continue
seen_dirs.add(path_dir)
candidate = os.path.abspath(os.path.join(path_dir, executable))
if candidate == self:
continue
if os.path.exists(candidate) and os.access(candidate, os.F_OK | os.X_OK):
return candidate
raise Exception('Executable "%s" not found in path: %s' % (executable, path))
if __name__ == '__main__':
main()