Mercurial > hgrepos > Python > libs > ConfigMix

annotate windows-dev/ninja_syntax.py @ 654:0d6673d06c2c

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Add support for using "tomllib" (in Python's stdlib since 3.11) and "tomli" TOML packages. They are preferred if they are found to be installed. But note that the declared dependency for the "toml" extra nevertheless is the "toml" package. Because it is available for all supported Python versions. So use Python 3.11+ or install "tomli" manually if you want to use the alternate packages.
author Franz Glasner <fzglas.hg@dom66.de>
date Thu, 19 May 2022 22:10:59 +0200
parents aa240af27589
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 # -*- coding: utf-8 -*-
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2 #
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3 # Copyright 2011 Google Inc. All Rights Reserved.
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4 # Copyright 2020 Franz Glasner. All Rights Reserved.
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5 #
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6 # Licensed under the Apache License, Version 2.0 (the "License");
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7 # you may not use this file except in compliance with the License.
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8 # You may obtain a copy of the License at
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9 #
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10 # http://www.apache.org/licenses/LICENSE-2.0
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11 #
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12 # Unless required by applicable law or agreed to in writing, software
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13 # distributed under the License is distributed on an "AS IS" BASIS,
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14 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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15 # See the License for the specific language governing permissions and
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16 # limitations under the License.
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17 #
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18 r"""Python module for generating .ninja files.
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19
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20 Note that this is emphatically not a required piece of Ninja; it's
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21 just a helpful utility for build-file-generation systems that already
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22 use Python.
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23
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24 :Copyright: \(c) 2001 Google Inc. All Rights Reserved.
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25 :Copyright: \(c) 2020 Franz Glasner. All Rights Reserved.
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26 :License: Apache License 2.0. See :ref:`LICENSE.txt <license>` for details.
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27
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28 """
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29
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30 from __future__ import absolute_import
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31
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32 import re
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33 import textwrap
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36 def escape_path(word):
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37 """Escape `word` according to Ninja's path interpretation rules.
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38
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39 Escapes not only ``$`` but also spaces and colons.
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40 """
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41 return word.replace('$ ', '$$ ').replace(' ', '$ ').replace(':', '$:')
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44 class Writer(object):
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45
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46 """An object-oriented writer of a Ninja build file.
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47
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48 Can act as its own context manager.
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49 """
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50
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51 def __init__(self, output, width=78):
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52 """
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53 :param output: an opened file-alike where to write into
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54 :param int width: the width where line-wrapping should happen
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55
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56 `output` just needs a `write()` and -- if :meth:`~.close` is called
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57 -- a `close()` method.
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58 """
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59 self.output = output
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60 self.width = width
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61
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62 def newline(self):
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63 self.output.write('\n')
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64
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65 def comment(self, text):
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66 for line in textwrap.wrap(text, self.width - 2, break_long_words=False,
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67 break_on_hyphens=False):
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68 self.output.write('# ' + line + '\n')
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69
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70 def variable(self, key, value, indent=0):
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71 if value is None:
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72 return
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73 if isinstance(value, list):
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74 value = ' '.join(filter(None, value)) # Filter out empty strings.
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75 self._line('%s = %s' % (key, value), indent)
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76
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77 def pool(self, name, depth):
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78 self._line('pool %s' % name)
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79 self.variable('depth', depth, indent=1)
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80
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81 def rule(self, name, command, description=None, depfile=None,
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82 generator=False, pool=None, restat=False, rspfile=None,
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83 rspfile_content=None, deps=None):
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84 self._line('rule %s' % name)
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85 self.variable('command', command, indent=1)
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86 if description:
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87 self.variable('description', description, indent=1)
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88 if depfile:
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89 self.variable('depfile', depfile, indent=1)
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90 if generator:
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91 self.variable('generator', '1', indent=1)
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92 if pool:
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93 self.variable('pool', pool, indent=1)
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94 if restat:
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95 self.variable('restat', '1', indent=1)
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96 if rspfile:
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97 self.variable('rspfile', rspfile, indent=1)
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98 if rspfile_content:
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99 self.variable('rspfile_content', rspfile_content, indent=1)
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100 if deps:
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101 self.variable('deps', deps, indent=1)
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102
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103 def build(self, outputs, rule, inputs=None, implicit=None, order_only=None,
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104 variables=None, implicit_outputs=None, pool=None):
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105 outputs = as_list(outputs)
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106 out_outputs = [escape_path(x) for x in outputs]
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107 all_inputs = [escape_path(x) for x in as_list(inputs)]
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108
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109 if implicit:
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110 implicit = [escape_path(x) for x in as_list(implicit)]
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111 all_inputs.append('|')
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112 all_inputs.extend(implicit)
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113 if order_only:
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114 order_only = [escape_path(x) for x in as_list(order_only)]
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115 all_inputs.append('||')
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116 all_inputs.extend(order_only)
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117 if implicit_outputs:
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118 implicit_outputs = [escape_path(x)
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119 for x in as_list(implicit_outputs)]
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120 out_outputs.append('|')
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121 out_outputs.extend(implicit_outputs)
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122
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123 self._line('build %s: %s' % (' '.join(out_outputs),
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124 ' '.join([rule] + all_inputs)))
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125 if pool is not None:
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126 self._line(' pool = %s' % pool)
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127
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128 if variables:
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129 if isinstance(variables, dict):
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130 iterator = iter(variables.items())
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131 else:
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132 iterator = iter(variables)
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133
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134 for key, val in iterator:
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135 self.variable(key, val, indent=1)
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136
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137 return outputs
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138
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139 def include(self, path):
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140 self._line('include %s' % path)
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141
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142 def subninja(self, path):
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143 self._line('subninja %s' % path)
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144
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145 def default(self, paths):
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146 self._line('default %s' % ' '.join(as_list(paths)))
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147
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148 def _count_dollars_before_index(self, s, i):
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149 """Returns the number of '$' characters right in front of s[i]."""
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150 dollar_count = 0
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151 dollar_index = i - 1
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152 while dollar_index > 0 and s[dollar_index] == '$':
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153 dollar_count += 1
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154 dollar_index -= 1
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155 return dollar_count
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156
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157 def _line(self, text, indent=0):
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158 """Write 'text' word-wrapped at self.width characters."""
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159 leading_space = ' ' * indent
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160 while len(leading_space) + len(text) > self.width:
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161 # The text is too wide; wrap if possible.
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162
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163 # Find the rightmost space that would obey our width constraint and
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164 # that's not an escaped space.
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165 available_space = self.width - len(leading_space) - len(' $')
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166 space = available_space
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167 while True:
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168 space = text.rfind(' ', 0, space)
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169 if (space < 0
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170 or self._count_dollars_before_index(text, space) % 2 == 0): # noqa: E501
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171 break
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172
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173 if space < 0:
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174 #
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175 # No such space;
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176 # just use the first unescaped space we can find.
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177 #
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178 space = available_space - 1
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diff changeset
179 while True:
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diff changeset
180 space = text.find(' ', space + 1)
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diff changeset
181 if (space < 0
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diff changeset
182 or self._count_dollars_before_index(text, space) % 2 == 0): # noqa: E501
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Franz Glasner <fzglas.hg@dom66.de>
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diff changeset
183 break
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diff changeset
184 if space < 0:
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185 # Give up on breaking.
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diff changeset
186 break
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187
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diff changeset
188 self.output.write(leading_space + text[0:space] + ' $\n')
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diff changeset
189 text = text[space+1:]
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diff changeset
190
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diff changeset
191 # Subsequent lines are continuations, so indent them.
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diff changeset
192 leading_space = ' ' * (indent+2)
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193
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diff changeset
194 self.output.write(leading_space + text + '\n')
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195
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diff changeset
196 def close(self):
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diff changeset
197 """Close the associated output"""
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diff changeset
198 self.output.close()
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199
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diff changeset
200 def __enter__(self):
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diff changeset
201 """Return `self`"""
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diff changeset
202 return self
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diff changeset
203
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diff changeset
204 def __exit__(self, *args, **kwds):
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diff changeset
205 """Close the associated output"""
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diff changeset
206 self.close()
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diff changeset
207
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diff changeset
208
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diff changeset
209 def as_list(input):
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diff changeset
210 """Ensure that `input` is always a :class:`list` -- wrap if needed
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diff changeset
211
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diff changeset
212 :rtype: list
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diff changeset
213
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diff changeset
214 """
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215
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diff changeset
216 if input is None:
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217 return []
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diff changeset
218 if isinstance(input, list):
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diff changeset
219 return input
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diff changeset
220 return [input]
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diff changeset
221
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diff changeset
222
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diff changeset
223 def escape(string):
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diff changeset
224 """Escape a string such that it can be embedded into a Ninja file without
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diff changeset
225 further interpretation."""
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diff changeset
226 assert '\n' not in string, 'Ninja syntax does not allow newlines'
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diff changeset
227 # We only have one special metacharacter: '$'.
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228 return string.replace('$', '$$')
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229
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230
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231 def expand(string, vars, local_vars={}):
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232 """Expand a string containing $vars as Ninja would.
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233
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234 Note: doesn't handle the full Ninja variable syntax, but it's enough
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235 to make configure.py's use of it work.
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236 """
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237 def exp(m):
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238 var = m.group(1)
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239 if var == '$':
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240 return '$'
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241 return local_vars.get(var, vars.get(var, ''))
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242 return re.sub(r'\$(\$|\w*)', exp, string)