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annotate piecrust/templating/base.py @ 1188:a7c43131d871

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bake: Fix file write flushing problem with Python 3.8+ Writing the cache files fails in Python 3.8 because it looks like flushing behaviour has changed. We need to explicitly flush. And even then, in very rare occurrences, it looks like it can still run into racing conditions, so we do a very hacky and ugly "retry" loop when fetching cached data :(
author Ludovic Chabant <ludovic@chabant.com>
date Tue, 15 Jun 2021 22:36:23 -0700
parents c4cf3cfe2726
children
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3 class TemplateNotFoundError(Exception):
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4 pass
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7 class TemplatingError(Exception):
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8 def __init__(self, message, filename=None, lineno=-1):
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9 super(TemplatingError, self).__init__()
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10 self.message = message
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11 self.filename = filename
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12 self.lineno = lineno
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13
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14 def __str__(self):
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15 msg = ''
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16 if self.filename:
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17 msg += self.filename
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18 if self.lineno >= 0:
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19 msg += ', line %d' % self.lineno
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20 msg += ': ' + self.message
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21 return msg
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24 class TemplateEngine(object):
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25 EXTENSIONS = []
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27 def initialize(self, app):
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28 self.app = app
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30 def populateCache(self):
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31 pass
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33 def renderSegment(self, path, segment, data):
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34 raise NotImplementedError()
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36 def renderFile(self, paths, data):
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37 raise NotImplementedError()