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from plugin.core.helpers.variable import merge |
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from subprocess import Popen |
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import json |
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import logging |
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import os |
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import subprocess |
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import sys |
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CURRENT_PATH = os.path.abspath(__file__) |
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HOST_PATH = os.path.join(os.path.dirname(CURRENT_PATH), 'host.py') |
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log = logging.getLogger(__name__) |
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class BaseTest(object): |
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name = None |
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optional = False |
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@classmethod |
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def run(cls, search_paths): |
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metadata = {} |
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message = None |
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success = None |
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# Retrieve names of test functions |
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names = [ |
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name for name in dir(cls) |
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if name.startswith('test_') |
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] |
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if not names: |
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return cls.build_failure('No tests defined') |
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# Run tests |
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for name in names: |
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# Ensure function exists |
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if not hasattr(cls, name): |
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return cls.build_failure('Unable to find function: %r' % name) |
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# Run test |
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try: |
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result = cls.spawn(name, search_paths) |
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# Merge test result into `metadata` |
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merge(metadata, result, recursive=True) |
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# Test successful |
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message = None |
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success = True |
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except Exception, ex: |
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if success: |
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continue |
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message = ex.message |
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success = False |
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if not success: |
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# Trigger event |
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cls.on_failure(message) |
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# Build result |
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return cls.build_failure(message) |
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# Trigger event |
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cls.on_success(metadata) |
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# Build result |
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return cls.build_success(metadata) |
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@classmethod |
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def spawn(cls, name, search_paths): |
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# Find path to python executable |
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python_exe = cls.find_python_executable() |
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if not python_exe: |
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raise Exception('Unable to find python executable') |
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# Ensure test host exists |
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if not os.path.exists(HOST_PATH): |
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raise Exception('Unable to find "host.py" script') |
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# Build test process arguments |
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args = [ |
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python_exe, HOST_PATH, |
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'--module', cls.__module__, |
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'--name', name, |
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'--search-paths="%s"' % ( |
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';'.join(search_paths) |
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), |
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] |
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# Spawn test (in sub-process) |
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log.debug('Starting test: %s:%s', cls.__module__, name) |
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process = Popen( |
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args, |
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stdout=subprocess.PIPE, |
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stderr=subprocess.PIPE |
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) |
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# Wait for test to complete |
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stdout, stderr = process.communicate() |
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if stderr: |
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log.debug('Test returned messages:\n%s', stderr.replace("\r\n", "\n")) |
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# Parse output |
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result = None |
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if stdout: |
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try: |
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result = json.loads(stdout) |
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except Exception, ex: |
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log.warn('Invalid output returned %r - %s', stdout, ex, exc_info=True) |
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# Build result |
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if process.returncode != 0: |
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# Test failed |
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if result and 'message' in result: |
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raise Exception(result['message']) |
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raise Exception('Unknown error (code: %s)' % process.returncode) |
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# Test successful |
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return result |
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@classmethod |
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def find_python_executable(cls): |
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candidates = [sys.executable] |
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# Add candidates based on the script path in `sys.argv` |
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if sys.argv and len(sys.argv) > 0 and os.path.exists(sys.argv[0]): |
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bootstrap_path = sys.argv[0] |
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resources_pos = bootstrap_path.lower().find('resources') |
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if resources_pos > 0: |
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pms_path = bootstrap_path[:resources_pos] |
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cls._add_python_home_candidates(candidates, pms_path) |
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# Add candidates relative to `PLEX_MEDIA_SERVER_HOME` |
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pms_home = os.environ.get('PLEX_MEDIA_SERVER_HOME') |
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if pms_home and os.path.exists(pms_home): |
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cls._add_python_home_candidates(candidates, pms_home) |
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# Add candidates relative to `PYTHONHOME` |
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python_home = os.environ.get('PYTHONHOME') |
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if python_home and os.path.exists(python_home): |
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candidates.append(os.path.join(python_home, 'bin', 'python')) |
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# Use first candidate that exists |
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for path in candidates: |
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if os.path.exists(path): |
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return path |
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log.warn('Unable to find python executable', extra={'candidates': candidates}) |
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return None |
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@staticmethod |
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def _add_python_home_candidates(candidates, path): |
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# Windows |
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candidates.append(os.path.join(path, 'PlexScriptHost.exe')) |
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# *nix |
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candidates.append(os.path.join(path, 'Resources', 'Plex Script Host')) |
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candidates.append(os.path.join(path, 'Resources', 'Python', 'bin', 'python')) |
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# |
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# Events |
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# |
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@classmethod |
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def on_failure(cls, message): |
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pass |
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@classmethod |
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def on_success(cls, metadata): |
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pass |
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# |
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# Helpers |
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# |
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@classmethod |
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def build_exception(cls, message, exc_info=None): |
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if exc_info is None: |
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exc_info = sys.exc_info() |
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return cls.build_failure( |
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message, |
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exc_info=exc_info |
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) |
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@classmethod |
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def build_failure(cls, message, **kwargs): |
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result = { |
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'success': False, |
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'message': message |
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} |
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# Merge extra attributes |
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merge(result, kwargs) |
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return result |
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@staticmethod |
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def build_success(metadata): |
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return { |
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'success': True, |
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'metadata': metadata |
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} |
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