106 lines
3.1 KiB
Python
106 lines
3.1 KiB
Python
import os
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import glob
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import datetime
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from watchdog.observers import Observer
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from watchdog.events import FileSystemEventHandler
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from watchdog.events import LoggingEventHandler
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def last_of(us):
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return us[-1]
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class Flick:
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def __init__(self, target, save_dir=".", delay=10, stamp_sep='_', date_template="%Y-%m-%dT%H:%M:%S"):
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self.base = target
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self.date_template = date_template
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self.date_sep = stamp_sep
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self.save_dir = save_dir
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self.delay = delay
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# Make a glob search expression with the date template.
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self.fields = {'Y':4,'m':2,'d':2,'H':2,'M':2,'S':2}
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self.glob_template = self.date_template
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for k in self.fields:
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self.glob_template = self.glob_template.replace("%"+k,'?'*self.fields[k])
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def __iter__(self):
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return self
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def make(self, save_dir, name, date, ext):
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# Current date with second precision (without micro-seconds).
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tag = date.isoformat().split(".")[0]
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flick = name + self.date_sep + tag + ext
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return os.path.join(save_dir, flick)
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def next(self):
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full = os.path.expanduser(self.base)
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head = os.path.basename(full)
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name,ext = os.path.splitext(head)
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pattern = name+self.date_sep+self.glob_template+ext
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existing = glob.glob(os.path.join(self.save_dir,pattern))
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date_now = datetime.datetime.now()
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#print(date_now)
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if existing:
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last = last_of(sorted(existing))
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root,ext = os.path.splitext(last)
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last_name = os.path.basename(root)
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# As we globbed the pattern, no need for complex regexp.
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last_tag = last_of(last_name.split(self.date_sep))
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last_date = datetime.datetime.strptime(last_tag, self.date_template)
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print("Last flick on:",last_date.isoformat())
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assert(last_date <= date_now)
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if date_now - last_date < datetime.timedelta(seconds=self.delay):
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return self.make(self.save_dir,name,last_date,ext)
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return self.make(self.save_dir,name,date_now,ext)
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class Save(FileSystemEventHandler):
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def __init__(self, target, flick = None):
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if not flick:
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self.flick = Flick(target)
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else:
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self.flick = flick
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self.base = target
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super(Save,self).__init__()
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def on_any_event(self, event):
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super(Save,self).on_any_event(event)
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if (not event.is_directory) and event.src_path == self.base:
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logging.info("Touched %s: %s", event.src_path, self.flick.next())
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if __name__=="__main__":
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import sys
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import time
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import logging
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target = sys.argv[1]
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path = os.path.dirname(target)
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flick = Flick(target)
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print(flick.next())
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observer = Observer()
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logging.basicConfig(level=logging.INFO,
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format='%(asctime)s - %(message)s',
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datefmt='%Y-%m-%d %H:%M:%S')
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event_handler = Save(target, flick)
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observer.schedule(event_handler, path)
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observer.start()
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try:
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while True:
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time.sleep(1)
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except KeyboardInterrupt:
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observer.stop()
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observer.join()
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