Mercurial > piecrust2

annotate piecrust/templating/jinjaengine.py @ 1153:a9a592f655e3

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config: Add setting for enabling baking or serving posts in the future.
author Ludovic Chabant <ludovic@chabant.com>
date Sat, 19 Jan 2019 17:41:30 -0800
parents 8adc27285d93
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 import os.path
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2 import logging
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3 from piecrust.sources.base import AbortedSourceUseError
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4 from piecrust.templating.base import (TemplateEngine, TemplateNotFoundError,
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5 TemplatingError)
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8 logger = logging.getLogger(__name__)
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10
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11 class JinjaTemplateEngine(TemplateEngine):
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12 ENGINE_NAMES = ['jinja', 'jinja2', 'j2']
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13 EXTENSIONS = ['html', 'jinja', 'jinja2', 'j2']
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14
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15 def __init__(self):
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16 self.env = None
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17 self._jinja_syntax_error = None
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18 self._jinja_not_found = None
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19
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20 def renderSegment(self, path, segment, data):
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21 if not _string_needs_render(segment.content):
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22 return segment.content, False
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23
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24 self._ensureLoaded()
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25
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26 seg_path = _make_segment_path(path, segment.offset)
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27 self.env.loader.segments_cache[seg_path] = (
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28 path, segment.content)
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29 try:
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30 tpl = self.env.get_template(seg_path)
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31 except self._jinja_syntax_error as tse:
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32 raise self._getTemplatingError(tse, filename=path)
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33 except self._jinja_not_found:
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34 raise TemplateNotFoundError()
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35
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36 try:
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37 return tpl.render(data), True
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38 except self._jinja_syntax_error as tse:
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39 raise self._getTemplatingError(tse)
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40 except AbortedSourceUseError:
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41 raise
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42 except Exception as ex:
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43 if self.app.debug:
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44 raise
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45 msg = "Error rendering Jinja markup"
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46 rel_path = os.path.relpath(path, self.app.root_dir)
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47 raise TemplatingError(msg, rel_path) from ex
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48
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49 def renderFile(self, paths, data):
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50 self._ensureLoaded()
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52 try:
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53 tpl = self.env.select_template(paths)
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54 except self._jinja_syntax_error as tse:
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55 raise self._getTemplatingError(tse)
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56 except self._jinja_not_found:
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57 raise TemplateNotFoundError()
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59 try:
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60 return tpl.render(data)
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61 except self._jinja_syntax_error as tse:
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62 raise self._getTemplatingError(tse)
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63 except AbortedSourceUseError:
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64 raise
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65 except Exception as ex:
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66 if self.app.debug:
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67 raise
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68 msg = "Error rendering Jinja markup"
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69 name = getattr(tpl, 'name', '<unknown template>')
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70 raise TemplatingError(msg, name) from ex
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71
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72 def _getTemplatingError(self, tse, filename=None):
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73 filename = tse.filename or filename
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74 if filename and os.path.isabs(filename):
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75 filename = os.path.relpath(filename, self.env.app.root_dir)
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76 err = TemplatingError(str(tse), filename, tse.lineno)
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77 raise err from tse
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79 def _ensureLoaded(self):
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80 if self.env is not None:
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81 return
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82
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83 stats = self.app.env.stats
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84 stats.registerTimer('JinjaTemplateEngine_setup',
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85 raise_if_registered=False)
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86 stats.registerTimer('JinjaTemplateEngine_extensions',
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87 raise_if_registered=False)
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88 with stats.timerScope('JinjaTemplateEngine_setup'):
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89 self._load()
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90
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91 def _load(self):
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92 get_config = self.app.config.get
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93
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94 # Get the list of extensions to load.
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95 ext_names = get_config('jinja/extensions', [])
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96 if not isinstance(ext_names, list):
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97 ext_names = [ext_names]
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98
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99 # Turn on autoescape by default.
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100 autoescape = get_config('jinja/auto_escape', True)
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101 if autoescape:
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102 ext_names.append('autoescape')
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103
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104 # Create the final list of extensions.
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105 from piecrust.templating.jinja.extensions import (
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106 PieCrustHighlightExtension, PieCrustCacheExtension,
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107 PieCrustSpacelessExtension, PieCrustFormatExtension)
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108 extensions = [
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109 PieCrustHighlightExtension,
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110 PieCrustCacheExtension,
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111 PieCrustSpacelessExtension,
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112 PieCrustFormatExtension]
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113 for n in ext_names:
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114 if '.' not in n:
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115 n = 'jinja2.ext.' + n
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116 extensions.append(n)
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117 for je in self.app.plugin_loader.getTemplateEngineExtensions('jinja'):
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118 extensions.append(je)
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119
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120 # Create the Jinja environment.
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121 logger.debug("Creating Jinja environment with folders: %s" %
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122 self.app.templates_dirs)
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123 from piecrust.templating.jinja.loader import PieCrustLoader
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124 loader = PieCrustLoader(self.app.templates_dirs)
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125 from piecrust.templating.jinja.environment import PieCrustEnvironment
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126 self.env = PieCrustEnvironment(
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127 self.app,
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128 loader=loader,
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129 extensions=extensions)
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130
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131 # Get types we need later.
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132 from jinja2 import TemplateNotFound
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133 from jinja2.exceptions import TemplateSyntaxError
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134 self._jinja_syntax_error = TemplateSyntaxError
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135 self._jinja_not_found = TemplateNotFound
3
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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136
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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137
454
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138 def _string_needs_render(txt):
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139 index = txt.find('{')
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140 while index >= 0:
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141 ch = txt[index + 1]
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142 if ch == '{' or ch == '%':
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143 return True
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144 index = txt.find('{', index + 1)
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145 return False
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146
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147
924
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148 def _make_segment_path(path, start):
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149 return '$seg=%s:%d' % (path, start)
454
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150