Mercurial > repos > shellac > guppy_basecaller

annotate env/lib/python3.7/site-packages/jinja2/environment.py @ 0:26e78fe6e8c4 draft

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"planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
author shellac
date Sat, 02 May 2020 07:14:21 -0400
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1 # -*- coding: utf-8 -*-
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2 """Classes for managing templates and their runtime and compile time
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3 options.
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4 """
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5 import os
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6 import sys
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7 import weakref
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8 from functools import partial
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9 from functools import reduce
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10
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11 from markupsafe import Markup
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12
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13 from . import nodes
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14 from ._compat import encode_filename
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15 from ._compat import implements_iterator
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16 from ._compat import implements_to_string
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17 from ._compat import iteritems
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18 from ._compat import PY2
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19 from ._compat import PYPY
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20 from ._compat import reraise
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21 from ._compat import string_types
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22 from ._compat import text_type
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23 from .compiler import CodeGenerator
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24 from .compiler import generate
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25 from .defaults import BLOCK_END_STRING
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26 from .defaults import BLOCK_START_STRING
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27 from .defaults import COMMENT_END_STRING
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28 from .defaults import COMMENT_START_STRING
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29 from .defaults import DEFAULT_FILTERS
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30 from .defaults import DEFAULT_NAMESPACE
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31 from .defaults import DEFAULT_POLICIES
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32 from .defaults import DEFAULT_TESTS
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33 from .defaults import KEEP_TRAILING_NEWLINE
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34 from .defaults import LINE_COMMENT_PREFIX
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35 from .defaults import LINE_STATEMENT_PREFIX
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36 from .defaults import LSTRIP_BLOCKS
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37 from .defaults import NEWLINE_SEQUENCE
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38 from .defaults import TRIM_BLOCKS
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39 from .defaults import VARIABLE_END_STRING
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40 from .defaults import VARIABLE_START_STRING
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41 from .exceptions import TemplateNotFound
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42 from .exceptions import TemplateRuntimeError
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43 from .exceptions import TemplatesNotFound
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44 from .exceptions import TemplateSyntaxError
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45 from .exceptions import UndefinedError
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46 from .lexer import get_lexer
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47 from .lexer import TokenStream
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48 from .nodes import EvalContext
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49 from .parser import Parser
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50 from .runtime import Context
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51 from .runtime import new_context
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52 from .runtime import Undefined
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53 from .utils import concat
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54 from .utils import consume
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55 from .utils import have_async_gen
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56 from .utils import import_string
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57 from .utils import internalcode
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58 from .utils import LRUCache
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59 from .utils import missing
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60
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61 # for direct template usage we have up to ten living environments
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62 _spontaneous_environments = LRUCache(10)
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63
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64
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65 def get_spontaneous_environment(cls, *args):
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66 """Return a new spontaneous environment. A spontaneous environment
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67 is used for templates created directly rather than through an
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68 existing environment.
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69
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70 :param cls: Environment class to create.
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71 :param args: Positional arguments passed to environment.
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72 """
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73 key = (cls, args)
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74
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75 try:
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76 return _spontaneous_environments[key]
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77 except KeyError:
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78 _spontaneous_environments[key] = env = cls(*args)
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79 env.shared = True
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80 return env
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81
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82
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83 def create_cache(size):
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84 """Return the cache class for the given size."""
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85 if size == 0:
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86 return None
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87 if size < 0:
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88 return {}
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89 return LRUCache(size)
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90
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91
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92 def copy_cache(cache):
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93 """Create an empty copy of the given cache."""
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94 if cache is None:
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95 return None
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96 elif type(cache) is dict:
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97 return {}
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98 return LRUCache(cache.capacity)
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99
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100
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101 def load_extensions(environment, extensions):
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102 """Load the extensions from the list and bind it to the environment.
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103 Returns a dict of instantiated environments.
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104 """
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105 result = {}
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106 for extension in extensions:
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107 if isinstance(extension, string_types):
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108 extension = import_string(extension)
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109 result[extension.identifier] = extension(environment)
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110 return result
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111
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112
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113 def fail_for_missing_callable(string, name):
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114 msg = string % name
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115 if isinstance(name, Undefined):
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116 try:
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117 name._fail_with_undefined_error()
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118 except Exception as e:
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119 msg = "%s (%s; did you forget to quote the callable name?)" % (msg, e)
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120 raise TemplateRuntimeError(msg)
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121
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122
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123 def _environment_sanity_check(environment):
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124 """Perform a sanity check on the environment."""
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125 assert issubclass(
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126 environment.undefined, Undefined
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127 ), "undefined must be a subclass of undefined because filters depend on it."
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128 assert (
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129 environment.block_start_string
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130 != environment.variable_start_string
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131 != environment.comment_start_string
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132 ), "block, variable and comment start strings must be different"
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133 assert environment.newline_sequence in (
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134 "\r",
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135 "\r\n",
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136 "\n",
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137 ), "newline_sequence set to unknown line ending string."
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138 return environment
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139
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140
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141 class Environment(object):
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142 r"""The core component of Jinja is the `Environment`. It contains
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143 important shared variables like configuration, filters, tests,
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144 globals and others. Instances of this class may be modified if
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145 they are not shared and if no template was loaded so far.
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146 Modifications on environments after the first template was loaded
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147 will lead to surprising effects and undefined behavior.
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148
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149 Here are the possible initialization parameters:
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150
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151 `block_start_string`
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152 The string marking the beginning of a block. Defaults to ``'{%'``.
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153
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154 `block_end_string`
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155 The string marking the end of a block. Defaults to ``'%}'``.
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156
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157 `variable_start_string`
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158 The string marking the beginning of a print statement.
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159 Defaults to ``'{{'``.
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160
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161 `variable_end_string`
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162 The string marking the end of a print statement. Defaults to
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163 ``'}}'``.
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164
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165 `comment_start_string`
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166 The string marking the beginning of a comment. Defaults to ``'{#'``.
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167
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168 `comment_end_string`
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169 The string marking the end of a comment. Defaults to ``'#}'``.
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170
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171 `line_statement_prefix`
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172 If given and a string, this will be used as prefix for line based
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173 statements. See also :ref:`line-statements`.
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174
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175 `line_comment_prefix`
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176 If given and a string, this will be used as prefix for line based
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177 comments. See also :ref:`line-statements`.
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178
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179 .. versionadded:: 2.2
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180
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181 `trim_blocks`
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182 If this is set to ``True`` the first newline after a block is
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183 removed (block, not variable tag!). Defaults to `False`.
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184
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185 `lstrip_blocks`
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186 If this is set to ``True`` leading spaces and tabs are stripped
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187 from the start of a line to a block. Defaults to `False`.
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188
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189 `newline_sequence`
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190 The sequence that starts a newline. Must be one of ``'\r'``,
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191 ``'\n'`` or ``'\r\n'``. The default is ``'\n'`` which is a
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192 useful default for Linux and OS X systems as well as web
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193 applications.
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194
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195 `keep_trailing_newline`
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196 Preserve the trailing newline when rendering templates.
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197 The default is ``False``, which causes a single newline,
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198 if present, to be stripped from the end of the template.
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199
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200 .. versionadded:: 2.7
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201
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202 `extensions`
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203 List of Jinja extensions to use. This can either be import paths
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204 as strings or extension classes. For more information have a
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205 look at :ref:`the extensions documentation <jinja-extensions>`.
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206
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207 `optimized`
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208 should the optimizer be enabled? Default is ``True``.
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209
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210 `undefined`
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211 :class:`Undefined` or a subclass of it that is used to represent
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212 undefined values in the template.
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213
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214 `finalize`
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215 A callable that can be used to process the result of a variable
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216 expression before it is output. For example one can convert
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217 ``None`` implicitly into an empty string here.
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218
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219 `autoescape`
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220 If set to ``True`` the XML/HTML autoescaping feature is enabled by
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221 default. For more details about autoescaping see
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222 :class:`~markupsafe.Markup`. As of Jinja 2.4 this can also
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223 be a callable that is passed the template name and has to
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224 return ``True`` or ``False`` depending on autoescape should be
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225 enabled by default.
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226
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227 .. versionchanged:: 2.4
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228 `autoescape` can now be a function
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229
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230 `loader`
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231 The template loader for this environment.
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232
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233 `cache_size`
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234 The size of the cache. Per default this is ``400`` which means
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235 that if more than 400 templates are loaded the loader will clean
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236 out the least recently used template. If the cache size is set to
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237 ``0`` templates are recompiled all the time, if the cache size is
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238 ``-1`` the cache will not be cleaned.
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239
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240 .. versionchanged:: 2.8
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241 The cache size was increased to 400 from a low 50.
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242
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243 `auto_reload`
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244 Some loaders load templates from locations where the template
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245 sources may change (ie: file system or database). If
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246 ``auto_reload`` is set to ``True`` (default) every time a template is
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247 requested the loader checks if the source changed and if yes, it
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248 will reload the template. For higher performance it's possible to
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249 disable that.
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250
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251 `bytecode_cache`
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252 If set to a bytecode cache object, this object will provide a
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253 cache for the internal Jinja bytecode so that templates don't
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254 have to be parsed if they were not changed.
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255
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256 See :ref:`bytecode-cache` for more information.
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257
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258 `enable_async`
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259 If set to true this enables async template execution which allows
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260 you to take advantage of newer Python features. This requires
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261 Python 3.6 or later.
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262 """
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263
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264 #: if this environment is sandboxed. Modifying this variable won't make
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265 #: the environment sandboxed though. For a real sandboxed environment
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266 #: have a look at jinja2.sandbox. This flag alone controls the code
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267 #: generation by the compiler.
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268 sandboxed = False
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269
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270 #: True if the environment is just an overlay
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271 overlayed = False
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272
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273 #: the environment this environment is linked to if it is an overlay
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274 linked_to = None
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275
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276 #: shared environments have this set to `True`. A shared environment
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277 #: must not be modified
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278 shared = False
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279
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280 #: the class that is used for code generation. See
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281 #: :class:`~jinja2.compiler.CodeGenerator` for more information.
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282 code_generator_class = CodeGenerator
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283
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284 #: the context class thatis used for templates. See
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285 #: :class:`~jinja2.runtime.Context` for more information.
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286 context_class = Context
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287
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288 def __init__(
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289 self,
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290 block_start_string=BLOCK_START_STRING,
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291 block_end_string=BLOCK_END_STRING,
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292 variable_start_string=VARIABLE_START_STRING,
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293 variable_end_string=VARIABLE_END_STRING,
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294 comment_start_string=COMMENT_START_STRING,
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295 comment_end_string=COMMENT_END_STRING,
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296 line_statement_prefix=LINE_STATEMENT_PREFIX,
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297 line_comment_prefix=LINE_COMMENT_PREFIX,
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298 trim_blocks=TRIM_BLOCKS,
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299 lstrip_blocks=LSTRIP_BLOCKS,
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300 newline_sequence=NEWLINE_SEQUENCE,
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301 keep_trailing_newline=KEEP_TRAILING_NEWLINE,
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302 extensions=(),
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303 optimized=True,
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304 undefined=Undefined,
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305 finalize=None,
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306 autoescape=False,
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307 loader=None,
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308 cache_size=400,
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309 auto_reload=True,
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310 bytecode_cache=None,
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311 enable_async=False,
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312 ):
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313 # !!Important notice!!
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314 # The constructor accepts quite a few arguments that should be
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315 # passed by keyword rather than position. However it's important to
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316 # not change the order of arguments because it's used at least
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317 # internally in those cases:
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318 # - spontaneous environments (i18n extension and Template)
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319 # - unittests
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320 # If parameter changes are required only add parameters at the end
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321 # and don't change the arguments (or the defaults!) of the arguments
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322 # existing already.
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323
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324 # lexer / parser information
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325 self.block_start_string = block_start_string
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326 self.block_end_string = block_end_string
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327 self.variable_start_string = variable_start_string
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328 self.variable_end_string = variable_end_string
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329 self.comment_start_string = comment_start_string
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330 self.comment_end_string = comment_end_string
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331 self.line_statement_prefix = line_statement_prefix
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332 self.line_comment_prefix = line_comment_prefix
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333 self.trim_blocks = trim_blocks
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334 self.lstrip_blocks = lstrip_blocks
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335 self.newline_sequence = newline_sequence
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336 self.keep_trailing_newline = keep_trailing_newline
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337
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338 # runtime information
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339 self.undefined = undefined
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340 self.optimized = optimized
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341 self.finalize = finalize
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342 self.autoescape = autoescape
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343
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344 # defaults
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345 self.filters = DEFAULT_FILTERS.copy()
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346 self.tests = DEFAULT_TESTS.copy()
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347 self.globals = DEFAULT_NAMESPACE.copy()
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348
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349 # set the loader provided
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350 self.loader = loader
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351 self.cache = create_cache(cache_size)
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352 self.bytecode_cache = bytecode_cache
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353 self.auto_reload = auto_reload
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354
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355 # configurable policies
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356 self.policies = DEFAULT_POLICIES.copy()
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357
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358 # load extensions
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359 self.extensions = load_extensions(self, extensions)
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360
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361 self.enable_async = enable_async
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362 self.is_async = self.enable_async and have_async_gen
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363 if self.is_async:
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364 # runs patch_all() to enable async support
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365 from . import asyncsupport # noqa: F401
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366
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367 _environment_sanity_check(self)
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368
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369 def add_extension(self, extension):
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370 """Adds an extension after the environment was created.
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371
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372 .. versionadded:: 2.5
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373 """
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374 self.extensions.update(load_extensions(self, [extension]))
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375
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376 def extend(self, **attributes):
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377 """Add the items to the instance of the environment if they do not exist
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378 yet. This is used by :ref:`extensions <writing-extensions>` to register
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379 callbacks and configuration values without breaking inheritance.
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380 """
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381 for key, value in iteritems(attributes):
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382 if not hasattr(self, key):
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383 setattr(self, key, value)
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384
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385 def overlay(
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386 self,
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387 block_start_string=missing,
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388 block_end_string=missing,
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389 variable_start_string=missing,
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parents:
diff changeset
390 variable_end_string=missing,
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
391 comment_start_string=missing,
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
392 comment_end_string=missing,
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
393 line_statement_prefix=missing,
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
394 line_comment_prefix=missing,
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
395 trim_blocks=missing,
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
396 lstrip_blocks=missing,
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
397 extensions=missing,
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
398 optimized=missing,
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
399 undefined=missing,
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
400 finalize=missing,
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
401 autoescape=missing,
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
402 loader=missing,
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
403 cache_size=missing,
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
404 auto_reload=missing,
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
405 bytecode_cache=missing,
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
406 ):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
407 """Create a new overlay environment that shares all the data with the
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
408 current environment except for cache and the overridden attributes.
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
409 Extensions cannot be removed for an overlayed environment. An overlayed
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
410 environment automatically gets all the extensions of the environment it
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
411 is linked to plus optional extra extensions.
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
412
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
413 Creating overlays should happen after the initial environment was set
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
414 up completely. Not all attributes are truly linked, some are just
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
415 copied over so modifications on the original environment may not shine
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
416 through.
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
417 """
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
418 args = dict(locals())
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
419 del args["self"], args["cache_size"], args["extensions"]
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
420
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
421 rv = object.__new__(self.__class__)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
422 rv.__dict__.update(self.__dict__)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
423 rv.overlayed = True
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
424 rv.linked_to = self
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
425
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
426 for key, value in iteritems(args):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
427 if value is not missing:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
428 setattr(rv, key, value)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
429
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
430 if cache_size is not missing:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
431 rv.cache = create_cache(cache_size)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
432 else:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
433 rv.cache = copy_cache(self.cache)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
434
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
435 rv.extensions = {}
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
436 for key, value in iteritems(self.extensions):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
437 rv.extensions[key] = value.bind(rv)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
438 if extensions is not missing:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
439 rv.extensions.update(load_extensions(rv, extensions))
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
440
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
441 return _environment_sanity_check(rv)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
442
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
443 lexer = property(get_lexer, doc="The lexer for this environment.")
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
444
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
445 def iter_extensions(self):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
446 """Iterates over the extensions by priority."""
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
447 return iter(sorted(self.extensions.values(), key=lambda x: x.priority))
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
448
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
449 def getitem(self, obj, argument):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
450 """Get an item or attribute of an object but prefer the item."""
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
451 try:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
452 return obj[argument]
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
453 except (AttributeError, TypeError, LookupError):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
454 if isinstance(argument, string_types):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
455 try:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
456 attr = str(argument)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
457 except Exception:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
458 pass
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
459 else:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
460 try:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
461 return getattr(obj, attr)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
462 except AttributeError:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
463 pass
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
464 return self.undefined(obj=obj, name=argument)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
465
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
466 def getattr(self, obj, attribute):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
467 """Get an item or attribute of an object but prefer the attribute.
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
468 Unlike :meth:`getitem` the attribute *must* be a bytestring.
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
469 """
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
470 try:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
471 return getattr(obj, attribute)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
472 except AttributeError:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
473 pass
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
474 try:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
475 return obj[attribute]
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
476 except (TypeError, LookupError, AttributeError):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
477 return self.undefined(obj=obj, name=attribute)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
478
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
479 def call_filter(
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
480 self, name, value, args=None, kwargs=None, context=None, eval_ctx=None
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
481 ):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
482 """Invokes a filter on a value the same way the compiler does it.
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
483
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
484 Note that on Python 3 this might return a coroutine in case the
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
485 filter is running from an environment in async mode and the filter
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
486 supports async execution. It's your responsibility to await this
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
487 if needed.
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
488
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
489 .. versionadded:: 2.7
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
490 """
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
491 func = self.filters.get(name)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
492 if func is None:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
493 fail_for_missing_callable("no filter named %r", name)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
494 args = [value] + list(args or ())
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
495 if getattr(func, "contextfilter", False) is True:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
496 if context is None:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
497 raise TemplateRuntimeError(
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
498 "Attempted to invoke context filter without context"
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
499 )
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
500 args.insert(0, context)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
501 elif getattr(func, "evalcontextfilter", False) is True:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
502 if eval_ctx is None:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
503 if context is not None:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
504 eval_ctx = context.eval_ctx
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
505 else:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
506 eval_ctx = EvalContext(self)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
507 args.insert(0, eval_ctx)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
508 elif getattr(func, "environmentfilter", False) is True:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
509 args.insert(0, self)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
510 return func(*args, **(kwargs or {}))
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
511
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
512 def call_test(self, name, value, args=None, kwargs=None):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
513 """Invokes a test on a value the same way the compiler does it.
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
514
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
515 .. versionadded:: 2.7
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
516 """
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
517 func = self.tests.get(name)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
518 if func is None:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
519 fail_for_missing_callable("no test named %r", name)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
520 return func(value, *(args or ()), **(kwargs or {}))
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parents:
diff changeset
521
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parents:
diff changeset
522 @internalcode
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parents:
diff changeset
523 def parse(self, source, name=None, filename=None):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
524 """Parse the sourcecode and return the abstract syntax tree. This
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
525 tree of nodes is used by the compiler to convert the template into
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
526 executable source- or bytecode. This is useful for debugging or to
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
527 extract information from templates.
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
528
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
529 If you are :ref:`developing Jinja extensions <writing-extensions>`
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
530 this gives you a good overview of the node tree generated.
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
531 """
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
532 try:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
533 return self._parse(source, name, filename)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
534 except TemplateSyntaxError:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
535 self.handle_exception(source=source)
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parents:
diff changeset
536
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parents:
diff changeset
537 def _parse(self, source, name, filename):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
538 """Internal parsing function used by `parse` and `compile`."""
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
539 return Parser(self, source, name, encode_filename(filename)).parse()
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
540
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
541 def lex(self, source, name=None, filename=None):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
542 """Lex the given sourcecode and return a generator that yields
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
543 tokens as tuples in the form ``(lineno, token_type, value)``.
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
544 This can be useful for :ref:`extension development <writing-extensions>`
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
545 and debugging templates.
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
546
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parents:
diff changeset
547 This does not perform preprocessing. If you want the preprocessing
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
548 of the extensions to be applied you have to filter source through
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
549 the :meth:`preprocess` method.
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parents:
diff changeset
550 """
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
551 source = text_type(source)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
552 try:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
553 return self.lexer.tokeniter(source, name, filename)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
554 except TemplateSyntaxError:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
555 self.handle_exception(source=source)
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shellac
parents:
diff changeset
556
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
557 def preprocess(self, source, name=None, filename=None):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
558 """Preprocesses the source with all extensions. This is automatically
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
559 called for all parsing and compiling methods but *not* for :meth:`lex`
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
560 because there you usually only want the actual source tokenized.
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
561 """
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
562 return reduce(
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
563 lambda s, e: e.preprocess(s, name, filename),
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
564 self.iter_extensions(),
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
565 text_type(source),
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
566 )
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
567
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
568 def _tokenize(self, source, name, filename=None, state=None):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
569 """Called by the parser to do the preprocessing and filtering
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
570 for all the extensions. Returns a :class:`~jinja2.lexer.TokenStream`.
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
571 """
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
572 source = self.preprocess(source, name, filename)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
573 stream = self.lexer.tokenize(source, name, filename, state)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
574 for ext in self.iter_extensions():
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
575 stream = ext.filter_stream(stream)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
576 if not isinstance(stream, TokenStream):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
577 stream = TokenStream(stream, name, filename)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
578 return stream
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
579
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
580 def _generate(self, source, name, filename, defer_init=False):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
581 """Internal hook that can be overridden to hook a different generate
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
582 method in.
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
583
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
584 .. versionadded:: 2.5
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
585 """
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
586 return generate(
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
587 source,
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
588 self,
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
589 name,
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
590 filename,
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
591 defer_init=defer_init,
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
592 optimized=self.optimized,
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parents:
diff changeset
593 )
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
594
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
595 def _compile(self, source, filename):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
596 """Internal hook that can be overridden to hook a different compile
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
597 method in.
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
598
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
599 .. versionadded:: 2.5
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
600 """
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
601 return compile(source, filename, "exec")
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
602
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
603 @internalcode
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
604 def compile(self, source, name=None, filename=None, raw=False, defer_init=False):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
605 """Compile a node or template source code. The `name` parameter is
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
606 the load name of the template after it was joined using
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
607 :meth:`join_path` if necessary, not the filename on the file system.
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
608 the `filename` parameter is the estimated filename of the template on
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
609 the file system. If the template came from a database or memory this
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
610 can be omitted.
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
611
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
612 The return value of this method is a python code object. If the `raw`
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
613 parameter is `True` the return value will be a string with python
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
614 code equivalent to the bytecode returned otherwise. This method is
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
615 mainly used internally.
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
616
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
617 `defer_init` is use internally to aid the module code generator. This
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
618 causes the generated code to be able to import without the global
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
619 environment variable to be set.
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
620
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
621 .. versionadded:: 2.4
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
622 `defer_init` parameter added.
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
623 """
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
624 source_hint = None
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
625 try:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
626 if isinstance(source, string_types):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
627 source_hint = source
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
628 source = self._parse(source, name, filename)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
629 source = self._generate(source, name, filename, defer_init=defer_init)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
630 if raw:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
631 return source
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
632 if filename is None:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
633 filename = "<template>"
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
634 else:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
635 filename = encode_filename(filename)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
636 return self._compile(source, filename)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
637 except TemplateSyntaxError:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
638 self.handle_exception(source=source_hint)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
639
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
640 def compile_expression(self, source, undefined_to_none=True):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
641 """A handy helper method that returns a callable that accepts keyword
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
642 arguments that appear as variables in the expression. If called it
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
643 returns the result of the expression.
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
644
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
645 This is useful if applications want to use the same rules as Jinja
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
646 in template "configuration files" or similar situations.
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
647
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
648 Example usage:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
649
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
650 >>> env = Environment()
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
651 >>> expr = env.compile_expression('foo == 42')
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
652 >>> expr(foo=23)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
653 False
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
654 >>> expr(foo=42)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
655 True
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
656
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
657 Per default the return value is converted to `None` if the
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
658 expression returns an undefined value. This can be changed
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
659 by setting `undefined_to_none` to `False`.
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
660
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
661 >>> env.compile_expression('var')() is None
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
662 True
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
663 >>> env.compile_expression('var', undefined_to_none=False)()
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
664 Undefined
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
665
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
666 .. versionadded:: 2.1
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
667 """
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
668 parser = Parser(self, source, state="variable")
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
669 try:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
670 expr = parser.parse_expression()
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
671 if not parser.stream.eos:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
672 raise TemplateSyntaxError(
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
673 "chunk after expression", parser.stream.current.lineno, None, None
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
674 )
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
675 expr.set_environment(self)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
676 except TemplateSyntaxError:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
677 if sys.exc_info() is not None:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
678 self.handle_exception(source=source)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
679
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
680 body = [nodes.Assign(nodes.Name("result", "store"), expr, lineno=1)]
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
681 template = self.from_string(nodes.Template(body, lineno=1))
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
682 return TemplateExpression(template, undefined_to_none)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
683
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
684 def compile_templates(
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
685 self,
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
686 target,
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
687 extensions=None,
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
688 filter_func=None,
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
689 zip="deflated",
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
690 log_function=None,
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
691 ignore_errors=True,
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
692 py_compile=False,
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
693 ):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
694 """Finds all the templates the loader can find, compiles them
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
695 and stores them in `target`. If `zip` is `None`, instead of in a
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
696 zipfile, the templates will be stored in a directory.
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
697 By default a deflate zip algorithm is used. To switch to
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
698 the stored algorithm, `zip` can be set to ``'stored'``.
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
699
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
700 `extensions` and `filter_func` are passed to :meth:`list_templates`.
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
701 Each template returned will be compiled to the target folder or
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
702 zipfile.
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
703
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
704 By default template compilation errors are ignored. In case a
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
705 log function is provided, errors are logged. If you want template
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
706 syntax errors to abort the compilation you can set `ignore_errors`
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
707 to `False` and you will get an exception on syntax errors.
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
708
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
709 If `py_compile` is set to `True` .pyc files will be written to the
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
710 target instead of standard .py files. This flag does not do anything
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
711 on pypy and Python 3 where pyc files are not picked up by itself and
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
712 don't give much benefit.
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
713
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
714 .. versionadded:: 2.4
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
715 """
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
716 from .loaders import ModuleLoader
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
717
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
718 if log_function is None:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
719
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
720 def log_function(x):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
721 pass
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
722
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
723 if py_compile:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
724 if not PY2 or PYPY:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
725 import warnings
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
726
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
727 warnings.warn(
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
728 "'py_compile=True' has no effect on PyPy or Python"
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
729 " 3 and will be removed in version 3.0",
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
730 DeprecationWarning,
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
731 stacklevel=2,
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
732 )
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
733 py_compile = False
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
734 else:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
735 import imp
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
736 import marshal
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
737
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
738 py_header = imp.get_magic() + u"\xff\xff\xff\xff".encode("iso-8859-15")
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
739
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
740 # Python 3.3 added a source filesize to the header
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
741 if sys.version_info >= (3, 3):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
742 py_header += u"\x00\x00\x00\x00".encode("iso-8859-15")
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
743
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
744 def write_file(filename, data):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
745 if zip:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
746 info = ZipInfo(filename)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
747 info.external_attr = 0o755 << 16
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
748 zip_file.writestr(info, data)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
749 else:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
750 if isinstance(data, text_type):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
751 data = data.encode("utf8")
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
752
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
753 with open(os.path.join(target, filename), "wb") as f:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
754 f.write(data)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
755
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
756 if zip is not None:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
757 from zipfile import ZipFile, ZipInfo, ZIP_DEFLATED, ZIP_STORED
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
758
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
759 zip_file = ZipFile(
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
760 target, "w", dict(deflated=ZIP_DEFLATED, stored=ZIP_STORED)[zip]
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
761 )
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
762 log_function('Compiling into Zip archive "%s"' % target)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
763 else:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
764 if not os.path.isdir(target):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
765 os.makedirs(target)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
766 log_function('Compiling into folder "%s"' % target)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
767
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
768 try:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
769 for name in self.list_templates(extensions, filter_func):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
770 source, filename, _ = self.loader.get_source(self, name)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
771 try:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
772 code = self.compile(source, name, filename, True, True)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
773 except TemplateSyntaxError as e:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
774 if not ignore_errors:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
775 raise
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
776 log_function('Could not compile "%s": %s' % (name, e))
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
777 continue
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
778
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
779 filename = ModuleLoader.get_module_filename(name)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
780
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
781 if py_compile:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
782 c = self._compile(code, encode_filename(filename))
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
783 write_file(filename + "c", py_header + marshal.dumps(c))
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
784 log_function('Byte-compiled "%s" as %s' % (name, filename + "c"))
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
785 else:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
786 write_file(filename, code)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
787 log_function('Compiled "%s" as %s' % (name, filename))
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
788 finally:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
789 if zip:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
790 zip_file.close()
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
791
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
792 log_function("Finished compiling templates")
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
793
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
794 def list_templates(self, extensions=None, filter_func=None):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
795 """Returns a list of templates for this environment. This requires
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
796 that the loader supports the loader's
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
797 :meth:`~BaseLoader.list_templates` method.
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
798
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
799 If there are other files in the template folder besides the
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
800 actual templates, the returned list can be filtered. There are two
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
801 ways: either `extensions` is set to a list of file extensions for
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
802 templates, or a `filter_func` can be provided which is a callable that
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
803 is passed a template name and should return `True` if it should end up
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
804 in the result list.
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
805
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
806 If the loader does not support that, a :exc:`TypeError` is raised.
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
807
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
808 .. versionadded:: 2.4
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
809 """
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
810 names = self.loader.list_templates()
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
811
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
812 if extensions is not None:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
813 if filter_func is not None:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
814 raise TypeError(
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
815 "either extensions or filter_func can be passed, but not both"
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
816 )
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
817
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
818 def filter_func(x):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
819 return "." in x and x.rsplit(".", 1)[1] in extensions
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
820
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
821 if filter_func is not None:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
822 names = [name for name in names if filter_func(name)]
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
823
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
824 return names
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
825
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
826 def handle_exception(self, source=None):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
827 """Exception handling helper. This is used internally to either raise
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
828 rewritten exceptions or return a rendered traceback for the template.
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
829 """
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
830 from .debug import rewrite_traceback_stack
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
831
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
832 reraise(*rewrite_traceback_stack(source=source))
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
833
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
834 def join_path(self, template, parent):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
835 """Join a template with the parent. By default all the lookups are
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
836 relative to the loader root so this method returns the `template`
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
837 parameter unchanged, but if the paths should be relative to the
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
838 parent template, this function can be used to calculate the real
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
839 template name.
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
840
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
841 Subclasses may override this method and implement template path
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
842 joining here.
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
843 """
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
844 return template
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
845
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
846 @internalcode
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
847 def _load_template(self, name, globals):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
848 if self.loader is None:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
849 raise TypeError("no loader for this environment specified")
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
850 cache_key = (weakref.ref(self.loader), name)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
851 if self.cache is not None:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
852 template = self.cache.get(cache_key)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
853 if template is not None and (
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
854 not self.auto_reload or template.is_up_to_date
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
855 ):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
856 return template
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
857 template = self.loader.load(self, name, globals)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
858 if self.cache is not None:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
859 self.cache[cache_key] = template
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
860 return template
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
861
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
862 @internalcode
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
863 def get_template(self, name, parent=None, globals=None):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
864 """Load a template from the loader. If a loader is configured this
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
865 method asks the loader for the template and returns a :class:`Template`.
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
866 If the `parent` parameter is not `None`, :meth:`join_path` is called
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
867 to get the real template name before loading.
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
868
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
869 The `globals` parameter can be used to provide template wide globals.
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
870 These variables are available in the context at render time.
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
871
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
872 If the template does not exist a :exc:`TemplateNotFound` exception is
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
873 raised.
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
874
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
875 .. versionchanged:: 2.4
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
876 If `name` is a :class:`Template` object it is returned from the
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
877 function unchanged.
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
878 """
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
879 if isinstance(name, Template):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
880 return name
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
881 if parent is not None:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
882 name = self.join_path(name, parent)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
883 return self._load_template(name, self.make_globals(globals))
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
884
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
885 @internalcode
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
886 def select_template(self, names, parent=None, globals=None):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
887 """Works like :meth:`get_template` but tries a number of templates
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
888 before it fails. If it cannot find any of the templates, it will
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
889 raise a :exc:`TemplatesNotFound` exception.
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
890
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
891 .. versionchanged:: 2.11
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
892 If names is :class:`Undefined`, an :exc:`UndefinedError` is
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
893 raised instead. If no templates were found and names
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
894 contains :class:`Undefined`, the message is more helpful.
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
895
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
896 .. versionchanged:: 2.4
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
897 If `names` contains a :class:`Template` object it is returned
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
898 from the function unchanged.
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
899
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
900 .. versionadded:: 2.3
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
901 """
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
902 if isinstance(names, Undefined):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
903 names._fail_with_undefined_error()
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
904
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
905 if not names:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
906 raise TemplatesNotFound(
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
907 message=u"Tried to select from an empty list " u"of templates."
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
908 )
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parents:
diff changeset
909 globals = self.make_globals(globals)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
910 for name in names:
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parents:
diff changeset
911 if isinstance(name, Template):
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parents:
diff changeset
912 return name
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
913 if parent is not None:
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parents:
diff changeset
914 name = self.join_path(name, parent)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
915 try:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
916 return self._load_template(name, globals)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
917 except (TemplateNotFound, UndefinedError):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
918 pass
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
919 raise TemplatesNotFound(names)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
920
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parents:
diff changeset
921 @internalcode
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
922 def get_or_select_template(self, template_name_or_list, parent=None, globals=None):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
923 """Does a typecheck and dispatches to :meth:`select_template`
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
924 if an iterable of template names is given, otherwise to
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
925 :meth:`get_template`.
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
926
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parents:
diff changeset
927 .. versionadded:: 2.3
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parents:
diff changeset
928 """
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parents:
diff changeset
929 if isinstance(template_name_or_list, (string_types, Undefined)):
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parents:
diff changeset
930 return self.get_template(template_name_or_list, parent, globals)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
931 elif isinstance(template_name_or_list, Template):
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parents:
diff changeset
932 return template_name_or_list
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parents:
diff changeset
933 return self.select_template(template_name_or_list, parent, globals)
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parents:
diff changeset
934
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
935 def from_string(self, source, globals=None, template_class=None):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
936 """Load a template from a string. This parses the source given and
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
937 returns a :class:`Template` object.
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
938 """
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
939 globals = self.make_globals(globals)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
940 cls = template_class or self.template_class
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
941 return cls.from_code(self, self.compile(source), globals, None)
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parents:
diff changeset
942
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parents:
diff changeset
943 def make_globals(self, d):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
944 """Return a dict for the globals."""
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parents:
diff changeset
945 if not d:
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parents:
diff changeset
946 return self.globals
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parents:
diff changeset
947 return dict(self.globals, **d)
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parents:
diff changeset
948
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parents:
diff changeset
949
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
950 class Template(object):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
951 """The central template object. This class represents a compiled template
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
952 and is used to evaluate it.
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parents:
diff changeset
953
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parents:
diff changeset
954 Normally the template object is generated from an :class:`Environment` but
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
955 it also has a constructor that makes it possible to create a template
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
956 instance directly using the constructor. It takes the same arguments as
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
957 the environment constructor but it's not possible to specify a loader.
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
958
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
959 Every template object has a few methods and members that are guaranteed
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
960 to exist. However it's important that a template object should be
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
961 considered immutable. Modifications on the object are not supported.
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parents:
diff changeset
962
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parents:
diff changeset
963 Template objects created from the constructor rather than an environment
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
964 do have an `environment` attribute that points to a temporary environment
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
965 that is probably shared with other templates created with the constructor
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
966 and compatible settings.
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
967
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parents:
diff changeset
968 >>> template = Template('Hello {{ name }}!')
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
969 >>> template.render(name='John Doe') == u'Hello John Doe!'
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
970 True
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
971 >>> stream = template.stream(name='John Doe')
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
972 >>> next(stream) == u'Hello John Doe!'
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
973 True
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shellac
parents:
diff changeset
974 >>> next(stream)
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shellac
parents:
diff changeset
975 Traceback (most recent call last):
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parents:
diff changeset
976 ...
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
977 StopIteration
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
978 """
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
979
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
980 #: Type of environment to create when creating a template directly
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
981 #: rather than through an existing environment.
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shellac
parents:
diff changeset
982 environment_class = Environment
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parents:
diff changeset
983
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shellac
parents:
diff changeset
984 def __new__(
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shellac
parents:
diff changeset
985 cls,
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
986 source,
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
987 block_start_string=BLOCK_START_STRING,
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
988 block_end_string=BLOCK_END_STRING,
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
989 variable_start_string=VARIABLE_START_STRING,
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
990 variable_end_string=VARIABLE_END_STRING,
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
991 comment_start_string=COMMENT_START_STRING,
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
992 comment_end_string=COMMENT_END_STRING,
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
993 line_statement_prefix=LINE_STATEMENT_PREFIX,
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
994 line_comment_prefix=LINE_COMMENT_PREFIX,
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
995 trim_blocks=TRIM_BLOCKS,
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
996 lstrip_blocks=LSTRIP_BLOCKS,
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
997 newline_sequence=NEWLINE_SEQUENCE,
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
998 keep_trailing_newline=KEEP_TRAILING_NEWLINE,
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
999 extensions=(),
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
1000 optimized=True,
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
1001 undefined=Undefined,
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
1002 finalize=None,
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
1003 autoescape=False,
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
1004 enable_async=False,
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
1005 ):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
1006 env = get_spontaneous_environment(
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
1007 cls.environment_class,
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
1008 block_start_string,
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
1009 block_end_string,
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parents:
diff changeset
1010 variable_start_string,
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parents:
diff changeset
1011 variable_end_string,
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parents:
diff changeset
1012 comment_start_string,
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parents:
diff changeset
1013 comment_end_string,
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parents:
diff changeset
1014 line_statement_prefix,
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
1015 line_comment_prefix,
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
1016 trim_blocks,
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
1017 lstrip_blocks,
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
1018 newline_sequence,
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
1019 keep_trailing_newline,
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
1020 frozenset(extensions),
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
1021 optimized,
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
1022 undefined,
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
1023 finalize,
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
1024 autoescape,
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
1025 None,
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parents:
diff changeset
1026 0,
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parents:
diff changeset
1027 False,
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parents:
diff changeset
1028 None,
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
1029 enable_async,
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
1030 )
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diff changeset
1031 return env.from_string(source, template_class=cls)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
1032
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
1033 @classmethod
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
1034 def from_code(cls, environment, code, globals, uptodate=None):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
1035 """Creates a template object from compiled code and the globals. This
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
1036 is used by the loaders and environment to create a template object.
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
1037 """
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1038 namespace = {"environment": environment, "__file__": code.co_filename}
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1039 exec(code, namespace)
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1040 rv = cls._from_namespace(environment, namespace, globals)
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1041 rv._uptodate = uptodate
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1042 return rv
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1043
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1044 @classmethod
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1045 def from_module_dict(cls, environment, module_dict, globals):
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1046 """Creates a template object from a module. This is used by the
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1047 module loader to create a template object.
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1048
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1049 .. versionadded:: 2.4
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1050 """
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1051 return cls._from_namespace(environment, module_dict, globals)
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1052
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1053 @classmethod
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1054 def _from_namespace(cls, environment, namespace, globals):
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1055 t = object.__new__(cls)
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1056 t.environment = environment
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1057 t.globals = globals
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1058 t.name = namespace["name"]
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1059 t.filename = namespace["__file__"]
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1060 t.blocks = namespace["blocks"]
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1061
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1062 # render function and module
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1063 t.root_render_func = namespace["root"]
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1064 t._module = None
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1065
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1066 # debug and loader helpers
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1067 t._debug_info = namespace["debug_info"]
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1068 t._uptodate = None
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1069
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1070 # store the reference
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1071 namespace["environment"] = environment
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1072 namespace["__jinja_template__"] = t
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1073
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1074 return t
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1075
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1076 def render(self, *args, **kwargs):
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1077 """This method accepts the same arguments as the `dict` constructor:
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1078 A dict, a dict subclass or some keyword arguments. If no arguments
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1079 are given the context will be empty. These two calls do the same::
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1080
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1081 template.render(knights='that say nih')
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1082 template.render({'knights': 'that say nih'})
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1083
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1084 This will return the rendered template as unicode string.
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1085 """
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1086 vars = dict(*args, **kwargs)
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1087 try:
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1088 return concat(self.root_render_func(self.new_context(vars)))
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1089 except Exception:
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1090 self.environment.handle_exception()
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1091
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1092 def render_async(self, *args, **kwargs):
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1093 """This works similar to :meth:`render` but returns a coroutine
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1094 that when awaited returns the entire rendered template string. This
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1095 requires the async feature to be enabled.
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1096
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1097 Example usage::
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1098
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1099 await template.render_async(knights='that say nih; asynchronously')
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1100 """
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1101 # see asyncsupport for the actual implementation
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1102 raise NotImplementedError(
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1103 "This feature is not available for this version of Python"
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1104 )
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1105
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1106 def stream(self, *args, **kwargs):
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1107 """Works exactly like :meth:`generate` but returns a
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1108 :class:`TemplateStream`.
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1109 """
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1110 return TemplateStream(self.generate(*args, **kwargs))
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1111
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1112 def generate(self, *args, **kwargs):
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1113 """For very large templates it can be useful to not render the whole
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1114 template at once but evaluate each statement after another and yield
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1115 piece for piece. This method basically does exactly that and returns
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1116 a generator that yields one item after another as unicode strings.
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1117
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1118 It accepts the same arguments as :meth:`render`.
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1119 """
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1120 vars = dict(*args, **kwargs)
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1121 try:
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1122 for event in self.root_render_func(self.new_context(vars)):
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diff changeset
1123 yield event
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1124 except Exception:
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1125 yield self.environment.handle_exception()
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1126
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1127 def generate_async(self, *args, **kwargs):
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1128 """An async version of :meth:`generate`. Works very similarly but
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1129 returns an async iterator instead.
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1130 """
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1131 # see asyncsupport for the actual implementation
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1132 raise NotImplementedError(
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1133 "This feature is not available for this version of Python"
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1134 )
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1135
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1136 def new_context(self, vars=None, shared=False, locals=None):
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1137 """Create a new :class:`Context` for this template. The vars
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1138 provided will be passed to the template. Per default the globals
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1139 are added to the context. If shared is set to `True` the data
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1140 is passed as is to the context without adding the globals.
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1141
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1142 `locals` can be a dict of local variables for internal usage.
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1143 """
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1144 return new_context(
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1145 self.environment, self.name, self.blocks, vars, shared, self.globals, locals
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1146 )
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1147
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1148 def make_module(self, vars=None, shared=False, locals=None):
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1149 """This method works like the :attr:`module` attribute when called
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1150 without arguments but it will evaluate the template on every call
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1151 rather than caching it. It's also possible to provide
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1152 a dict which is then used as context. The arguments are the same
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1153 as for the :meth:`new_context` method.
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1154 """
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1155 return TemplateModule(self, self.new_context(vars, shared, locals))
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1156
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1157 def make_module_async(self, vars=None, shared=False, locals=None):
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1158 """As template module creation can invoke template code for
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1159 asynchronous executions this method must be used instead of the
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1160 normal :meth:`make_module` one. Likewise the module attribute
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1161 becomes unavailable in async mode.
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1162 """
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1163 # see asyncsupport for the actual implementation
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1164 raise NotImplementedError(
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diff changeset
1165 "This feature is not available for this version of Python"
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1166 )
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1167
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1168 @internalcode
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1169 def _get_default_module(self):
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1170 if self._module is not None:
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1171 return self._module
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1172 self._module = rv = self.make_module()
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1173 return rv
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1174
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1175 @property
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1176 def module(self):
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1177 """The template as module. This is used for imports in the
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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diff changeset
1178 template runtime but is also useful if one wants to access
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1179 exported template variables from the Python layer:
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1180
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diff changeset
1181 >>> t = Template('{% macro foo() %}42{% endmacro %}23')
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diff changeset
1182 >>> str(t.module)
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1183 '23'
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1184 >>> t.module.foo() == u'42'
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1185 True
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1186
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diff changeset
1187 This attribute is not available if async mode is enabled.
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1188 """
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diff changeset
1189 return self._get_default_module()
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diff changeset
1190
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1191 def get_corresponding_lineno(self, lineno):
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1192 """Return the source line number of a line number in the
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1193 generated bytecode as they are not in sync.
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1194 """
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1195 for template_line, code_line in reversed(self.debug_info):
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1196 if code_line <= lineno:
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1197 return template_line
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1198 return 1
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1199
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1200 @property
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1201 def is_up_to_date(self):
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diff changeset
1202 """If this variable is `False` there is a newer version available."""
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diff changeset
1203 if self._uptodate is None:
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diff changeset
1204 return True
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1205 return self._uptodate()
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1206
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1207 @property
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1208 def debug_info(self):
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diff changeset
1209 """The debug info mapping."""
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1210 if self._debug_info:
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1211 return [tuple(map(int, x.split("="))) for x in self._debug_info.split("&")]
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1212 return []
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1213
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1214 def __repr__(self):
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1215 if self.name is None:
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diff changeset
1216 name = "memory:%x" % id(self)
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1217 else:
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1218 name = repr(self.name)
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diff changeset
1219 return "<%s %s>" % (self.__class__.__name__, name)
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1220
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1221
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diff changeset
1222 @implements_to_string
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diff changeset
1223 class TemplateModule(object):
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diff changeset
1224 """Represents an imported template. All the exported names of the
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1225 template are available as attributes on this object. Additionally
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diff changeset
1226 converting it into an unicode- or bytestrings renders the contents.
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diff changeset
1227 """
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diff changeset
1228
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diff changeset
1229 def __init__(self, template, context, body_stream=None):
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diff changeset
1230 if body_stream is None:
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diff changeset
1231 if context.environment.is_async:
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parents:
diff changeset
1232 raise RuntimeError(
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diff changeset
1233 "Async mode requires a body stream "
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diff changeset
1234 "to be passed to a template module. Use "
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diff changeset
1235 "the async methods of the API you are "
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parents:
diff changeset
1236 "using."
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diff changeset
1237 )
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diff changeset
1238 body_stream = list(template.root_render_func(context))
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diff changeset
1239 self._body_stream = body_stream
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diff changeset
1240 self.__dict__.update(context.get_exported())
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parents:
diff changeset
1241 self.__name__ = template.name
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diff changeset
1242
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1243 def __html__(self):
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diff changeset
1244 return Markup(concat(self._body_stream))
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parents:
diff changeset
1245
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diff changeset
1246 def __str__(self):
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diff changeset
1247 return concat(self._body_stream)
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diff changeset
1248
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diff changeset
1249 def __repr__(self):
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diff changeset
1250 if self.__name__ is None:
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diff changeset
1251 name = "memory:%x" % id(self)
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diff changeset
1252 else:
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diff changeset
1253 name = repr(self.__name__)
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diff changeset
1254 return "<%s %s>" % (self.__class__.__name__, name)
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parents:
diff changeset
1255
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diff changeset
1256
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diff changeset
1257 class TemplateExpression(object):
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diff changeset
1258 """The :meth:`jinja2.Environment.compile_expression` method returns an
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
1259 instance of this object. It encapsulates the expression-like access
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
1260 to the template with an expression it wraps.
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diff changeset
1261 """
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diff changeset
1262
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diff changeset
1263 def __init__(self, template, undefined_to_none):
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parents:
diff changeset
1264 self._template = template
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diff changeset
1265 self._undefined_to_none = undefined_to_none
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diff changeset
1266
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diff changeset
1267 def __call__(self, *args, **kwargs):
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diff changeset
1268 context = self._template.new_context(dict(*args, **kwargs))
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diff changeset
1269 consume(self._template.root_render_func(context))
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parents:
diff changeset
1270 rv = context.vars["result"]
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diff changeset
1271 if self._undefined_to_none and isinstance(rv, Undefined):
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parents:
diff changeset
1272 rv = None
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parents:
diff changeset
1273 return rv
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parents:
diff changeset
1274
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parents:
diff changeset
1275
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diff changeset
1276 @implements_iterator
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diff changeset
1277 class TemplateStream(object):
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diff changeset
1278 """A template stream works pretty much like an ordinary python generator
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parents:
diff changeset
1279 but it can buffer multiple items to reduce the number of total iterations.
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parents:
diff changeset
1280 Per default the output is unbuffered which means that for every unbuffered
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parents:
diff changeset
1281 instruction in the template one unicode string is yielded.
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diff changeset
1282
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diff changeset
1283 If buffering is enabled with a buffer size of 5, five items are combined
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parents:
diff changeset
1284 into a new unicode string. This is mainly useful if you are streaming
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parents:
diff changeset
1285 big templates to a client via WSGI which flushes after each iteration.
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diff changeset
1286 """
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diff changeset
1287
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diff changeset
1288 def __init__(self, gen):
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diff changeset
1289 self._gen = gen
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diff changeset
1290 self.disable_buffering()
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parents:
diff changeset
1291
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1292 def dump(self, fp, encoding=None, errors="strict"):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
1293 """Dump the complete stream into a file or file-like object.
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
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1294 Per default unicode strings are written, if you want to encode
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1295 before writing specify an `encoding`.
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1296
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1297 Example usage::
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1298
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1299 Template('Hello {{ name }}!').stream(name='foo').dump('hello.html')
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1300 """
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1301 close = False
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1302 if isinstance(fp, string_types):
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1303 if encoding is None:
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1304 encoding = "utf-8"
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1305 fp = open(fp, "wb")
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1306 close = True
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1307 try:
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1308 if encoding is not None:
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1309 iterable = (x.encode(encoding, errors) for x in self)
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1310 else:
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1311 iterable = self
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1312 if hasattr(fp, "writelines"):
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1313 fp.writelines(iterable)
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1314 else:
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1315 for item in iterable:
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1316 fp.write(item)
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1317 finally:
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1318 if close:
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1319 fp.close()
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1320
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1321 def disable_buffering(self):
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1322 """Disable the output buffering."""
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1323 self._next = partial(next, self._gen)
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1324 self.buffered = False
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1325
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1326 def _buffered_generator(self, size):
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1327 buf = []
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1328 c_size = 0
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1329 push = buf.append
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1330
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1331 while 1:
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1332 try:
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1333 while c_size < size:
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1334 c = next(self._gen)
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1335 push(c)
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1336 if c:
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1337 c_size += 1
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1338 except StopIteration:
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1339 if not c_size:
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1340 return
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1341 yield concat(buf)
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1342 del buf[:]
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1343 c_size = 0
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1344
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1345 def enable_buffering(self, size=5):
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1346 """Enable buffering. Buffer `size` items before yielding them."""
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1347 if size <= 1:
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1348 raise ValueError("buffer size too small")
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1349
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1350 self.buffered = True
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1351 self._next = partial(next, self._buffered_generator(size))
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1352
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1353 def __iter__(self):
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1354 return self
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1355
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1356 def __next__(self):
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1357 return self._next()
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1358
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1359
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1360 # hook in default template class. if anyone reads this comment: ignore that
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1361 # it's possible to use custom templates ;-)
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1362 Environment.template_class = Template