Mercurial > kallithea

annotate rhodecode/lib/__init__.py @ 1639:95c3e33ef32e

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merged upto rev 019026a8cf67
author Marcin Kuzminski <marcin@python-works.com>
date Wed, 02 Nov 2011 22:19:47 +0200
parents 5498f86ba217 67168195a676
children cd1c21af123a
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1 # -*- coding: utf-8 -*-
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2 """
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3 rhodecode.lib.__init__
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4 ~~~~~~~~~~~~~~~~~~~~~~~
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5
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6 Some simple helper functions
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7
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8 :created_on: Jan 5, 2011
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9 :author: marcink
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10 :copyright: (C) 2009-2010 Marcin Kuzminski <marcin@python-works.com>
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11 :license: GPLv3, see COPYING for more details.
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12 """
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13 # This program is free software: you can redistribute it and/or modify
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14 # it under the terms of the GNU General Public License as published by
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15 # the Free Software Foundation, either version 3 of the License, or
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16 # (at your option) any later version.
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17 #
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18 # This program is distributed in the hope that it will be useful,
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19 # but WITHOUT ANY WARRANTY; without even the implied warranty of
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20 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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21 # GNU General Public License for more details.
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22 #
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23 # You should have received a copy of the GNU General Public License
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24 # along with this program. If not, see <http://www.gnu.org/licenses/>.
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25
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26 import os
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27
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28 def __get_lem():
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29 from pygments import lexers
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30 from string import lower
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31 from collections import defaultdict
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32
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33 d = defaultdict(lambda: [])
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34
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35 def __clean(s):
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36 s = s.lstrip('*')
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37 s = s.lstrip('.')
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38
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39 if s.find('[') != -1:
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40 exts = []
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41 start, stop = s.find('['), s.find(']')
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42
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43 for suffix in s[start + 1:stop]:
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44 exts.append(s[:s.find('[')] + suffix)
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45 return map(lower, exts)
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46 else:
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47 return map(lower, [s])
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48
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49 for lx, t in sorted(lexers.LEXERS.items()):
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50 m = map(__clean, t[-2])
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51 if m:
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52 m = reduce(lambda x, y: x + y, m)
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53 for ext in m:
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54 desc = lx.replace('Lexer', '')
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55 d[ext].append(desc)
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56
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57 return dict(d)
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58
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59 # language map is also used by whoosh indexer, which for those specified
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60 # extensions will index it's content
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61 LANGUAGES_EXTENSIONS_MAP = __get_lem()
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62
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63 # Additional mappings that are not present in the pygments lexers
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64 # NOTE: that this will overide any mappings in LANGUAGES_EXTENSIONS_MAP
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65 ADDITIONAL_MAPPINGS = {'xaml': 'XAML'}
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66
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67 LANGUAGES_EXTENSIONS_MAP.update(ADDITIONAL_MAPPINGS)
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68
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69
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70 def str2bool(_str):
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71 """
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72 returs True/False value from given string, it tries to translate the
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73 string into boolean
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74
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75 :param _str: string value to translate into boolean
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76 :rtype: boolean
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77 :returns: boolean from given string
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78 """
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79 if _str is None:
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80 return False
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81 if _str in (True, False):
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82 return _str
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83 _str = str(_str).strip().lower()
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84 return _str in ('t', 'true', 'y', 'yes', 'on', '1')
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85
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86
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87 def convert_line_endings(line, mode):
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88 """
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89 Converts a given line "line end" accordingly to given mode
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90
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91 Available modes are::
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92 0 - Unix
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93 1 - Mac
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94 2 - DOS
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95
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96 :param line: given line to convert
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97 :param mode: mode to convert to
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98 :rtype: str
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99 :return: converted line according to mode
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100 """
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101 from string import replace
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102
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103 if mode == 0:
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104 line = replace(line, '\r\n', '\n')
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105 line = replace(line, '\r', '\n')
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106 elif mode == 1:
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107 line = replace(line, '\r\n', '\r')
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108 line = replace(line, '\n', '\r')
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109 elif mode == 2:
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110 import re
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111 line = re.sub("\r(?!\n)|(?<!\r)\n", "\r\n", line)
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112 return line
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113
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114
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115 def detect_mode(line, default):
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116 """
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117 Detects line break for given line, if line break couldn't be found
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118 given default value is returned
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119
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120 :param line: str line
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121 :param default: default
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122 :rtype: int
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123 :return: value of line end on of 0 - Unix, 1 - Mac, 2 - DOS
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124 """
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125 if line.endswith('\r\n'):
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126 return 2
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127 elif line.endswith('\n'):
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128 return 0
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129 elif line.endswith('\r'):
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130 return 1
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131 else:
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132 return default
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133
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134
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135 def generate_api_key(username, salt=None):
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136 """
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137 Generates unique API key for given username, if salt is not given
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138 it'll be generated from some random string
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139
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140 :param username: username as string
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141 :param salt: salt to hash generate KEY
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142 :rtype: str
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143 :returns: sha1 hash from username+salt
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144 """
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145 from tempfile import _RandomNameSequence
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146 import hashlib
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147
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148 if salt is None:
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149 salt = _RandomNameSequence().next()
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150
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151 return hashlib.sha1(username + salt).hexdigest()
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152
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153
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154 def safe_unicode(str_, from_encoding='utf8'):
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155 """
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156 safe unicode function. Does few trick to turn str_ into unicode
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157
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158 In case of UnicodeDecode error we try to return it with encoding detected
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159 by chardet library if it fails fallback to unicode with errors replaced
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160
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161 :param str_: string to decode
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162 :rtype: unicode
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163 :returns: unicode object
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164 """
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165 if isinstance(str_, unicode):
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166 return str_
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167
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168 try:
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169 return unicode(str_)
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170 except UnicodeDecodeError:
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171 pass
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172
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173 try:
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174 return unicode(str_, from_encoding)
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175 except UnicodeDecodeError:
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176 pass
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177
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178 try:
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179 import chardet
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180 encoding = chardet.detect(str_)['encoding']
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181 if encoding is None:
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182 raise Exception()
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183 return str_.decode(encoding)
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184 except (ImportError, UnicodeDecodeError, Exception):
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185 return unicode(str_, from_encoding, 'replace')
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186
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187 def safe_str(unicode_, to_encoding='utf8'):
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188 """
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189 safe str function. Does few trick to turn unicode_ into string
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190
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191 In case of UnicodeEncodeError we try to return it with encoding detected
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192 by chardet library if it fails fallback to string with errors replaced
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193
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194 :param unicode_: unicode to encode
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195 :rtype: str
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196 :returns: str object
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197 """
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198
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199 if isinstance(unicode_, str):
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200 return unicode_
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201
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202 try:
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203 return unicode_.encode(to_encoding)
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204 except UnicodeEncodeError:
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205 pass
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206
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207 try:
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208 import chardet
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209 encoding = chardet.detect(unicode_)['encoding']
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210 print encoding
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211 if encoding is None:
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212 raise UnicodeEncodeError()
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213
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214 return unicode_.encode(encoding)
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215 except (ImportError, UnicodeEncodeError):
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216 return unicode_.encode(to_encoding, 'replace')
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217
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218 return safe_str
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219
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220
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221
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222 def engine_from_config(configuration, prefix='sqlalchemy.', **kwargs):
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223 """
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224 Custom engine_from_config functions that makes sure we use NullPool for
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225 file based sqlite databases. This prevents errors on sqlite. This only
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226 applies to sqlalchemy versions < 0.7.0
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227
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228 """
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229 import sqlalchemy
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230 from sqlalchemy import engine_from_config as efc
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231 import logging
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232
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233 if int(sqlalchemy.__version__.split('.')[1]) < 7:
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234
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235 # This solution should work for sqlalchemy < 0.7.0, and should use
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236 # proxy=TimerProxy() for execution time profiling
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237
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238 from sqlalchemy.pool import NullPool
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239 url = configuration[prefix + 'url']
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240
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241 if url.startswith('sqlite'):
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242 kwargs.update({'poolclass': NullPool})
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243 return efc(configuration, prefix, **kwargs)
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244 else:
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245 import time
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246 from sqlalchemy import event
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247 from sqlalchemy.engine import Engine
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248
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249 log = logging.getLogger('sqlalchemy.engine')
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250 BLACK, RED, GREEN, YELLOW, BLUE, MAGENTA, CYAN, WHITE = xrange(30, 38)
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251 engine = efc(configuration, prefix, **kwargs)
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252
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253 def color_sql(sql):
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254 COLOR_SEQ = "\033[1;%dm"
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255 COLOR_SQL = YELLOW
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256 normal = '\x1b[0m'
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257 return ''.join([COLOR_SEQ % COLOR_SQL, sql, normal])
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258
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259 if configuration['debug']:
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260 #attach events only for debug configuration
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261
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262 def before_cursor_execute(conn, cursor, statement,
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263 parameters, context, executemany):
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264 context._query_start_time = time.time()
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265 log.info(color_sql(">>>>> STARTING QUERY >>>>>"))
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266
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267
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268 def after_cursor_execute(conn, cursor, statement,
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269 parameters, context, executemany):
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270 total = time.time() - context._query_start_time
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271 log.info(color_sql("<<<<< TOTAL TIME: %f <<<<<" % total))
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272
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273 event.listen(engine, "before_cursor_execute",
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274 before_cursor_execute)
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275 event.listen(engine, "after_cursor_execute",
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276 after_cursor_execute)
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277
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278 return engine
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279
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280
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281 def age(curdate):
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282 """
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283 turns a datetime into an age string.
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284
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285 :param curdate: datetime object
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286 :rtype: unicode
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287 :returns: unicode words describing age
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288 """
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289
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290 from datetime import datetime
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291 from webhelpers.date import time_ago_in_words
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292
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293 _ = lambda s:s
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294
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295 if not curdate:
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296 return ''
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297
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298 agescales = [(_(u"year"), 3600 * 24 * 365),
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299 (_(u"month"), 3600 * 24 * 30),
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300 (_(u"day"), 3600 * 24),
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301 (_(u"hour"), 3600),
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302 (_(u"minute"), 60),
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303 (_(u"second"), 1), ]
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304
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305 age = datetime.now() - curdate
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306 age_seconds = (age.days * agescales[2][1]) + age.seconds
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307 pos = 1
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308 for scale in agescales:
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309 if scale[1] <= age_seconds:
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310 if pos == 6:pos = 5
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311 return '%s %s' % (time_ago_in_words(curdate,
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312 agescales[pos][0]), _('ago'))
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313 pos += 1
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314
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315 return _(u'just now')
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316
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317
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318 def uri_filter(uri):
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319 """
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320 Removes user:password from given url string
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321
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322 :param uri:
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323 :rtype: unicode
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324 :returns: filtered list of strings
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325 """
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326 if not uri:
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327 return ''
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328
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329 proto = ''
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330
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331 for pat in ('https://', 'http://'):
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332 if uri.startswith(pat):
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333 uri = uri[len(pat):]
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334 proto = pat
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335 break
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336
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337 # remove passwords and username
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338 uri = uri[uri.find('@') + 1:]
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339
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340 # get the port
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341 cred_pos = uri.find(':')
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342 if cred_pos == -1:
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343 host, port = uri, None
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344 else:
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345 host, port = uri[:cred_pos], uri[cred_pos + 1:]
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346
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347 return filter(None, [proto, host, port])
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348
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349
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350 def credentials_filter(uri):
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351 """
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352 Returns a url with removed credentials
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353
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354 :param uri:
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355 """
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356
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357 uri = uri_filter(uri)
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358 #check if we have port
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359 if len(uri) > 2 and uri[2]:
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360 uri[2] = ':' + uri[2]
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361
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362 return ''.join(uri)
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363
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364 def get_changeset_safe(repo, rev):
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365 """
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366 Safe version of get_changeset if this changeset doesn't exists for a
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367 repo it returns a Dummy one instead
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368
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369 :param repo:
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370 :param rev:
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371 """
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372 from vcs.backends.base import BaseRepository
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373 from vcs.exceptions import RepositoryError
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374 if not isinstance(repo, BaseRepository):
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375 raise Exception('You must pass an Repository '
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376 'object as first argument got %s', type(repo))
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377
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378 try:
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379 cs = repo.get_changeset(rev)
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380 except RepositoryError:
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381 from rhodecode.lib.utils import EmptyChangeset
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382 cs = EmptyChangeset(requested_revision=rev)
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383 return cs
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384
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385
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386 def get_current_revision(quiet=False):
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387 """
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388 Returns tuple of (number, id) from repository containing this package
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389 or None if repository could not be found.
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390
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391 :param quiet: prints error for fetching revision if True
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392 """
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393
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394 try:
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395 from vcs import get_repo
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396 from vcs.utils.helpers import get_scm
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397 repopath = os.path.join(os.path.dirname(__file__), '..', '..')
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398 scm = get_scm(repopath)[0]
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399 repo = get_repo(path=repopath, alias=scm)
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400 tip = repo.get_changeset()
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401 return (tip.revision, tip.short_id)
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402 except Exception, err:
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403 if not quiet:
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404 print ("Cannot retrieve rhodecode's revision. Original error "
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405 "was: %s" % err)
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406 return None
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407