Mercurial > piecrust2

annotate piecrust/templating/pystacheengine.py @ 298:b7ab1b503510

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data: Fix incorrect next/previous page URLs in pagination data. Consolidate splitting an URL between its first URL and its sub page number. Be careful about the index page's URL not losing its slash.
author Ludovic Chabant <ludovic@chabant.com>
date Wed, 11 Mar 2015 23:46:42 -0700
parents 139179dc7abd
children f4b7c8f183a4
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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139179dc7abd render: Add support for a Mustache template engine.
Ludovic Chabant <ludovic@chabant.com>
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1 import logging
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2 import pystache
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3 from piecrust.templating.base import (
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4 TemplateEngine, TemplateNotFoundError, TemplatingError)
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5
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6
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7 logger = logging.getLogger(__name__)
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8
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9
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10 class PystacheTemplateEngine(TemplateEngine):
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11 ENGINE_NAMES = ['mustache']
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12 EXTENSIONS = ['mustache']
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13
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14 def __init__(self):
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15 self.renderer = None
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16
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17 def renderString(self, txt, data, filename=None):
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18 self._ensureLoaded()
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19 try:
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20 return self.renderer.render(txt, data)
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21 except pystache.TemplateNotFoundError as ex:
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22 raise TemplateNotFoundError() from ex
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23 except pystache.PystacheError as ex:
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24 raise TemplatingError(str(ex), filename) from ex
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25
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26 def renderFile(self, paths, data):
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27 self._ensureLoaded()
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28 tpl = None
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29 logger.debug("Looking for template: %s" % paths)
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30 for p in paths:
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31 if not p.endswith('.mustache'):
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32 raise TemplatingError(
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33 "The Mustache template engine only accepts template "
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34 "filenames with a `.mustache` extension. Got: %s" %
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35 p)
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36 name = p[:-9] # strip `.mustache`
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37 try:
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38 tpl = self.renderer.load_template(name)
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39 except Exception as ex:
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40 print(p, ex)
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41 pass
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42
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43 if tpl is None:
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44 raise TemplateNotFoundError()
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45
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46 try:
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47 return self.renderer.render(tpl, data)
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48 except pystache.PystacheError as ex:
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49 raise TemplatingError(str(ex)) from ex
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50
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51 def _ensureLoaded(self):
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52 if self.renderer:
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53 return
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54
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55 self.renderer = pystache.Renderer(
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56 search_dirs=self.app.templates_dirs)
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57