mirror of
https://github.com/avatao-content/baseimage-tutorial-framework
synced 2024-11-05 23:51:21 +00:00
79 lines
2.2 KiB
Python
79 lines
2.2 KiB
Python
from os.path import dirname
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from re import compile, findall
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from abc import ABC, abstractmethod
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from watchdog.observers import Observer
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from watchdog.events import PatternMatchingEventHandler
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from tfw.components.mixins.callback_mixin import CallbackMixin
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from tfw.components.decorators.rate_limiter import RateLimiter
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class CallbackEventHandler(PatternMatchingEventHandler, ABC):
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def __init__(self, files, *callbacks):
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super().__init__(files)
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self.callbacks = callbacks
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@RateLimiter(rate_per_second=2)
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def on_modified(self, event):
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for callback in self.callbacks:
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callback()
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class HistoryMonitor(CallbackMixin, ABC):
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def __init__(self, histfile):
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CallbackMixin.__init__(self)
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self.histfile = histfile
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self._history = []
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self._last_length = len(self._history)
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self.observer = Observer()
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self.observer.schedule(CallbackEventHandler([self.histfile],
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self._fetch_history,
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self._invoke_callbacks),
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dirname(self.histfile))
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@property
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def history(self):
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return self._history
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def _fetch_history(self):
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self._last_length = len(self._history)
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with open(self.histfile, 'r') as ifile:
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pattern = compile(self.command_pattern)
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data = ifile.read()
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self._history = [self.sanitize_command(command) for command in findall(pattern, data)]
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@property
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@abstractmethod
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def command_pattern(self):
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raise NotImplementedError
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def sanitize_command(self, command):
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return command
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def _invoke_callbacks(self):
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if self._last_length < len(self._history):
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self._execute_callbacks(self.history)
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def watch(self):
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self.observer.start()
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def stop(self):
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self.observer.stop()
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self.observer.join()
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class BashMonitor(HistoryMonitor):
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@property
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def command_pattern(self):
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return r'.+'
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def sanitize_command(self, command):
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return command.strip()
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class GDBMonitor(HistoryMonitor):
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@property
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def command_pattern(self):
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return r'(?<=\n)\+(.+)\n'
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