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annotate roundup/install_util.py @ 388:2d92f93072f9

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Code using copyDigestedFile() that passes unit tests
author Jürgen Hermann <jhermann@users.sourceforge.net>
date Mon, 12 Nov 2001 23:17:38 +0000
parents c066d3c91728
children bdc2ea127ae9
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1 #
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2 # Copyright (c) 2001 Bizar Software Pty Ltd (http://www.bizarsoftware.com.au/)
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3 # This module is free software, and you may redistribute it and/or modify
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4 # under the same terms as Python, so long as this copyright message and
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5 # disclaimer are retained in their original form.
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6 #
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7 # IN NO EVENT SHALL BIZAR SOFTWARE PTY LTD BE LIABLE TO ANY PARTY FOR
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8 # DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING
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9 # OUT OF THE USE OF THIS CODE, EVEN IF THE AUTHOR HAS BEEN ADVISED OF THE
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10 # POSSIBILITY OF SUCH DAMAGE.
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11 #
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12 # BIZAR SOFTWARE PTY LTD SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
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13 # BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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14 # FOR A PARTICULAR PURPOSE. THE CODE PROVIDED HEREUNDER IS ON AN "AS IS"
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15 # BASIS, AND THERE IS NO OBLIGATION WHATSOEVER TO PROVIDE MAINTENANCE,
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16 # SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
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17 #
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18 # $Id: install_util.py,v 1.5 2001-11-12 23:17:38 jhermann Exp $
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19
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20 import os, sha, shutil
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21
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22 sgml_file_types = [".xml", ".ent", ".html", ".filter", ".index", ".item"]
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23 hash_file_types = [".py", ".sh", ".conf", ".cgi", '']
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24 slast_file_types = [".css"]
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25
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26 digested_file_types = sgml_file_types + hash_file_types + slast_file_types
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29 def checkDigest(filename):
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30 """Read file, check for valid fingerprint, return TRUE if ok"""
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31 # open and read file
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32 inp = open(filename, "r")
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33 lines = inp.readlines()
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34 inp.close()
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35
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36 # get fingerprint from last line
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37 if lines[-1][:6] == "#SHA: ":
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38 # handle .py/.sh comment
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39 fingerprint = lines[-1][6:].strip()
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40 elif lines[-1][:10] == "<!-- SHA: ":
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41 # handle xml/html files
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42 fingerprint = lines[-1][10:]
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43 fingerprint = fingerprint.replace('-->', '')
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44 fingerprint = fingerprint.strip()
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45 elif lines[-1][:8] == "/* SHA: ":
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46 # handle css files
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47 fingerprint = lines[-1][8:]
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48 fingerprint = fingerprint.replace('*/', '')
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49 fingerprint = fingerprint.strip()
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50 else:
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51 return 0
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52 del lines[-1]
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53
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54 # calculate current digest
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55 digest = sha.new()
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56 for line in lines:
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57 digest.update(line)
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58
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59 # compare current to stored digest
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60 return fingerprint == digest.hexdigest()
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62
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63 class DigestFile:
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64 """ A class that you can use like open() and that calculates
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65 and writes a SHA digest to the target file.
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66 """
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67
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68 def __init__(self, filename):
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69 self.filename = filename
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70 self.digest = sha.new()
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71 self.file = open(self.filename, "w")
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72
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73 def write(self, data):
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74 self.file.write(data)
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75 self.digest.update(data)
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76
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77 def close(self):
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78 file, ext = os.path.splitext(self.filename)
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79
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80 # ".filter", ".index", ".item" are roundup-specific
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81 if ext in sgml_file_types:
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82 self.file.write("<!-- SHA: %s -->\n" % (self.digest.hexdigest(),))
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83 elif ext in hash_file_types:
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84 self.file.write("#SHA: %s\n" % (self.digest.hexdigest(),))
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85 elif ext in slast_file_types:
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86 self.file.write("/* SHA: %s */\n" % (self.digest.hexdigest(),))
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87
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88 self.file.close()
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89
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90
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91 def copyDigestedFile(src, dst, copystat=1):
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92 """ Copy data from `src` to `dst`, adding a fingerprint to `dst`.
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93 If `copystat` is true, the file status is copied, too
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94 (like shutil.copy2).
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95 """
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96 if os.path.isdir(dst):
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97 dst = os.path.join(dst, os.path.basename(src))
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98
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99 dummy, ext = os.path.splitext(src)
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100 if ext not in digested_file_types:
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101 if copystat:
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102 return shutil.copy2(src, dst)
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103 else:
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104 return shutil.copyfile(src, dst)
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105
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106 fsrc = None
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107 fdst = None
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108 try:
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109 fsrc = open(src, 'r')
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110 fdst = DigestFile(dst)
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111 shutil.copyfileobj(fsrc, fdst)
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112 finally:
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113 if fdst: fdst.close()
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114 if fsrc: fsrc.close()
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115
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116 if copystat: shutil.copystat(src, dst)
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117
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118
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119 def test():
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120 import sys
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121
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122 testdata = open(sys.argv[0], 'r').read()
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123
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124 for ext in digested_file_types:
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125 testfile = "__digest_test" + ext
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126
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127 out = DigestFile(testfile)
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128 out.write(testdata)
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129 out.close()
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130
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131 assert checkDigest(testfile), "digest ok w/o modification"
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132
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133 mod = open(testfile, 'r+')
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134 mod.seek(0)
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135 mod.write('# changed!')
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136 mod.close()
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137
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138 assert not checkDigest(testfile), "digest fails after modification"
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140 os.remove(testfile)
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143 if __name__ == '__main__':
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144 test()
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145
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146 #
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147 # $Log: not supported by cvs2svn $
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148 # Revision 1.4 2001/11/12 23:14:40 jhermann
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149 # Copy function, and proper handling of unknown file types
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150 #
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151 # Revision 1.3 2001/11/12 22:38:48 richard
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152 # bleah typo
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153 #
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154 # Revision 1.2 2001/11/12 22:37:13 richard
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155 # Handle all the various file formats in roundup
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156 #
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157 # Revision 1.1 2001/11/12 22:26:32 jhermann
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158 # Added install utils (digest calculation)
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159 #
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160
Roundup Issue Tracker: http://roundup-tracker.org/