annotate piecrust/events.py @ 182:a54d3c0b5f4a

tests: Patch `os.path.exists` and improve patching for `open`. You can specify additional modules for which to patch `open`. Also, it was incorrectly updating the opened file, even when it was opened for read only. Now it only updates the contents if the file was opened for write, and supports appending to the end. Last, it supports opening text files in binary mode.
author Ludovic Chabant <ludovic@chabant.com>
date Sun, 04 Jan 2015 14:55:41 -0800
parents f485ba500df3
children f070a4fc033c
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f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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2 class Event(object):
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3 def __init__(self):
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4 self._handlers = []
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6 def __iadd__(self, handler):
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7 self._handlers.append(handler)
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8 return self
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10 def __isub__(self, handler):
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11 self._handlers.remove(handler)
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12 return self
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14 def fire(self, *args, **kwargs):
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15 # Make a copy of the handlers list in case some handler removes
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16 # itself while executing.
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17 handlers = list(self._handlers)
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18 for handler in handlers:
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19 handler(*args, **kwargs)
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