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from plugin.core.environment import Environment |
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from plugin.core.libraries.constants import CONTENTS_PATH |
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from plugin.core.libraries.helpers import StorageHelper, SystemHelper |
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import filecmp |
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import logging |
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import os |
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log = logging.getLogger(__name__) |
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class CacheManager(object): |
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@classmethod |
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def sync(cls): |
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"""Synchronize native libraries cache, adding/updating/removing items to match bundled libraries. |
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:rtype: str |
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""" |
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source, destination = cls.get_paths() |
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# Compare directories, discover tasks |
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changes = filecmp.dircmp(source, destination) |
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tasks = cls.discover(changes) |
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# Execute tasks |
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if tasks and not cls.execute(source, destination, tasks): |
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return None |
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return os.path.join(Environment.path.plugin_data, 'Libraries') |
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@classmethod |
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def discover(cls, changes, base_path='', tasks=None): |
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""""Discover actions required to update the cache. |
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:param changes: Changes between bundle + cache directories |
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:type changes: filecmp.dircmp |
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:param base_path: Current directory of changes |
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:type base_path: str |
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:param tasks: Current tasks |
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:type tasks: list or None |
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:rtype: list |
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""" |
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if tasks is None: |
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tasks = [] |
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def process(action, names): |
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for name in names: |
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# Ignore "*.pyc" files |
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if name.endswith('.pyc'): |
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continue |
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# Append task to list |
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tasks.append((action, os.path.join(base_path, name))) |
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# Create tasks from `changes` |
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process('add', changes.left_only) |
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process('delete', changes.right_only) |
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process('update', changes.diff_files) |
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# Process sub directories |
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for name, child in changes.subdirs.items(): |
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cls.discover(child, os.path.join(base_path, name), tasks) |
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# Tasks retrieved |
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return tasks |
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@classmethod |
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def execute(cls, source, destination, tasks): |
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"""Execute tasks on directories |
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:param source: Native libraries source directory |
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:type source: str |
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:param destination: Native libraries cache directory |
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:type destination: str |
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:param tasks: Tasks to execute |
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:type tasks: list |
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:rtype: bool |
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""" |
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success = True |
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for action, path in tasks: |
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if action in ['add', 'update']: |
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action_success = StorageHelper.copy(os.path.join(source, path), os.path.join(destination, path)) |
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elif action == 'delete': |
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action_success = StorageHelper.delete(os.path.join(destination, path)) |
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else: |
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log.warn('Unknown task: %r - %r', action, path) |
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action_success = False |
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if not action_success: |
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success = False |
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return success |
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@staticmethod |
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def get_paths(): |
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"""Retrieve system-specific native libraries source + destination path |
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:rtype: (str, str) |
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""" |
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# Retrieve system details |
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system = SystemHelper.name() |
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architecture = SystemHelper.architecture() |
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if not architecture: |
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return |
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# Build source path |
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source = os.path.join(CONTENTS_PATH, 'Libraries', system, architecture) |
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# Ensure `source` directory exists |
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if not os.path.exists(source): |
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log.error('Unable to find native libraries for platform (name: %r, architecture: %r)', system, architecture) |
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return None |
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123
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# Build path for native dependencies |
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destination = os.path.join(Environment.path.plugin_data, 'Libraries', system, architecture) |
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126
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# Ensure `destination` directory has been created |
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StorageHelper.create_directories(destination) |
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return source, destination |
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fuzeman /
Plex-Trakt-Scrobbler
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