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comparison mercurial/scmutil.py @ 14097:ca3376f044f8

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opener: add read & write utility methods The two new methods are useful for quickly opening a file for reading or writing. Unlike 'opener(...).read()', they ensure they the file is immediately closed without relying on CPython reference counting.
author Dan Villiom Podlaski Christiansen <danchr@gmail.com>
date Sat, 30 Apr 2011 19:41:53 +0200
parents e24b5e3c2f27
children c18204fd35b0
comparison
equal deleted inserted replaced
14096:dea93484cf9f 14097:ca3376f044f8
133 """Abstract base class; cannot be instantiated""" 133 """Abstract base class; cannot be instantiated"""
134 134
135 def __init__(self, *args, **kwargs): 135 def __init__(self, *args, **kwargs):
136 '''Prevent instantiation; don't call this from subclasses.''' 136 '''Prevent instantiation; don't call this from subclasses.'''
137 raise NotImplementedError('attempted instantiating ' + str(type(self))) 137 raise NotImplementedError('attempted instantiating ' + str(type(self)))
138
139 def read(self, *args, **kwargs):
140 fp = self(*args, **kwargs)
141 try:
142 return fp.read()
143 finally:
144 fp.close()
145
146 def write(self, data, *args, **kwargs):
147 fp = self(*args, **kwargs)
148 try:
149 return fp.write(data)
150 finally:
151 fp.close()
138 152
139 class opener(abstractopener): 153 class opener(abstractopener):
140 '''Open files relative to a base directory 154 '''Open files relative to a base directory
141 155
142 This class is used to hide the details of COW semantics and 156 This class is used to hide the details of COW semantics and