69 lines
1.8 KiB
Python
69 lines
1.8 KiB
Python
# ext/autohandler.py
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# Copyright (C) 2006-2016 the Mako authors and contributors <see AUTHORS file>
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#
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# This module is part of Mako and is released under
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# the MIT License: http://www.opensource.org/licenses/mit-license.php
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"""adds autohandler functionality to Mako templates.
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requires that the TemplateLookup class is used with templates.
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usage:
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<%!
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from mako.ext.autohandler import autohandler
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%>
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<%inherit file="${autohandler(template, context)}"/>
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or with custom autohandler filename:
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<%!
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from mako.ext.autohandler import autohandler
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%>
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<%inherit file="${autohandler(template, context, name='somefilename')}"/>
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"""
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import posixpath
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import os
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import re
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def autohandler(template, context, name='autohandler'):
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lookup = context.lookup
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_template_uri = template.module._template_uri
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if not lookup.filesystem_checks:
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try:
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return lookup._uri_cache[(autohandler, _template_uri, name)]
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except KeyError:
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pass
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tokens = re.findall(r'([^/]+)', posixpath.dirname(_template_uri)) + [name]
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while len(tokens):
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path = '/' + '/'.join(tokens)
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if path != _template_uri and _file_exists(lookup, path):
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if not lookup.filesystem_checks:
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return lookup._uri_cache.setdefault(
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(autohandler, _template_uri, name), path)
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else:
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return path
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if len(tokens) == 1:
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break
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tokens[-2:] = [name]
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if not lookup.filesystem_checks:
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return lookup._uri_cache.setdefault(
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(autohandler, _template_uri, name), None)
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else:
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return None
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def _file_exists(lookup, path):
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psub = re.sub(r'^/', '', path)
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for d in lookup.directories:
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if os.path.exists(d + '/' + psub):
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return True
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else:
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return False
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