Mercurial > mozilla > hg > ProfileManager

annotate profilemanager/manager.py @ 65:1cd3e3c71bff

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determine which backup to use from the given date
author Jeff Hammel <jhammel@mozilla.com>
date Fri, 07 May 2010 14:14:17 -0700
parents 18f16bd1ba6b
children 67dc95a355cc
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1 """
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2 manage Mozilla/Firefox profiles
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3 """
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4
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5 import os
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6 import shutil
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7 import string
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8 import time
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9 import ConfigParser
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10 from datetime import datetime
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11 from dateutil.parser import parse
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12 from random import Random
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13 from utils import format_tabular
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14 from ConfigParser import SafeConfigParser as ConfigParser
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16 # Changes to profiles.ini:
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17 # - add a ``backups`` field for each profile:
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18 # Backups = /path/to/backup:1273104310 /path/to/other/backup:1273104355
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19
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20 class ProfileNotFound(Exception):
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21 """
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22 exception when a profile is specified but is not present in a given
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23 .ini file
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24 """
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25 def __init__(self, profile, config):
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26 self.profile = profile
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27 self.config = config
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28 Exception.__init__(self,
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29 'Profile %s not found in %s' % (profile, config))
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30
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31 class NoBackupError(Exception):
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32 """
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33 exception when a sought backup is not found
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34 """
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35
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36 class ProfileManager(object):
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37
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38 backups_dir = 'backups' # directory for backups relative to profile_dir
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39
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40 def __init__(self, profiles):
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41 """
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42 - profiles: filesystem path to profiles.ini file
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43 """
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44 self.profiles = profiles
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45 self.profile_dir = os.path.abspath(os.path.dirname(profiles))
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46
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47 ### (public) API
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48
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49 def new(self, name, directory=None, hash=True):
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50 """
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51 generate a new clean profile
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52 - name: name of the profile to generate
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53 - directory: where to create the profile [DEFAULT: relative to profiles.ini]
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54 - hash: whether to generate a a random hash tag
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55 """
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56
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57 # path to the profile directory
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58 dirname = name
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59 relative = False
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60 if hash:
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61 dirname = '%s.%s' % (self.hash(), dirname)
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62 if not directory:
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63 directory = self.profile_dir
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64 relative = True
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65 path = os.path.join(directory, dirname)
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66
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67 # create directory
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68 # TODO: (optionally) pre-populate the directory a la Firefox
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69 os.mkdir(path)
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70
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71 # update profiles.ini
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72 self.add(name, relative and dirname or path, relative)
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73
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74 # return the directory name
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75 return path
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76
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77 def remove(self, name, delete=True):
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78 """
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79 remove a profile from profiles.ini
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80 - delete: delete the profile directory as well
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81 """
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82 parser = self.parser()
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83 section = self.section(name, parser)
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84 if section is None:
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85 raise ProfileNotFound(profile, self.profiles)
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86 if delete: # remove the profile from disk
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87 shutil.rmtree(self.path(name))
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88 parser.remove_section(section)
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89 self.write(parser)
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90
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91 def list(self, directories=False):
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92 """
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93 lists the profiles available in the config file
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94 - directories : display the directories
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95 """
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96 profiles = self.profiles_dict()
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97 if not directories:
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98 return sorted(profiles.keys())
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99 return dict([(name, self.path(name)) for name in profiles.keys()])
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100
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101 def clone(self, source, dest, add=True):
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102 """
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103 clones the profile `source` and output to `dest`
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104 - add: add the profile to the profiles.ini file
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105 """
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106
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107 # filesystem path of the `from` profile
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108 source_path = self.path(source)
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109
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110 # dest: fs path to back up to
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111 relative = False
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112 if os.path.sep in dest:
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113 if not os.path.isabs(dest):
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114 dest = os.path.abspath(dest)
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115 dirname = dest
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116 name = os.path.basename(dest)
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117 else:
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118 name = dest
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119 relative = True
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120 if add:
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121 dirname = '%s.%s' % (self.hash(), name)
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122 dest = os.path.join(self.profile_dir, dirname)
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123
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124 # update profiles.ini
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125 if add:
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126 self.add(name, dirname, relative)
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127
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128 # copy the files
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129 shutil.copytree(source_path, dest, symlinks=False)
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130
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131 return dest
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132
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133 def backup(self, profile, dest=None):
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134 """
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135 backup a profile
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136 - profile: name of the profile to be backed up
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137 - dest: name of the destination; if not given, a default is used
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138 """
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139
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140 # get the profile section
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141 parser = self.parser()
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142 section = self.section(profile)
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143 if section is None:
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144 raise ProfileNotFound(profile, self.profiles)
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145
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146 # determine destination directory
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147 if dest is None:
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148 dest = '%s.%d.bak' % (profile, int(time.time()))
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149 name = dest
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150 backups_dir = os.path.join(self.profile_dir, self.backups_dir)
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151 if not os.path.exists(backups_dir):
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152 os.mkdir(backups_dir)
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153 dest = os.path.join(backups_dir, dest)
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154 else:
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155 if not os.path.isabs(dest):
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156 dest = os.path.abspath(dest)
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157 name = dest
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158
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159 # copy the files
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160 self.clone(profile, dest, add=False)
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161
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162 # add backup entry to profiles.ini (colon separated):
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163 # `Backup=$(profile)s.$(datestamp)s.bak`
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164 if parser.has_option(section, 'Backups'):
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165 backups = '%s:%s' % (parser.get(section, 'Backups'), name)
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166 else:
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167 backups = name
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168 parser.set(section, 'Backups', backups)
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169 self.write(parser)
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170
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171 def backups(self, profile=None, datestamp=None):
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172 """
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173 list backups for a given profile, or all profiles if the
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174 profile is not given; returns a list of backups if
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175 profile is given or a dictionary of lists otherwise
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176 - datestamp: format of date; otherwise, seconds since epoch
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177 """
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178 if profile is None: # all profiles
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179 retval = {}
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180 profiles_dict = self.profiles_dict()
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181 for profile in profiles_dict:
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182 if 'Backups' in profiles_dict[profile]:
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183 retval[profile] = self.backups(profile, datestamp)
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184 return retval
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185
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186 # single profile
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187 profile_dict = self.profile_dict(profile)
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188 if 'Backups' not in profile_dict:
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189 return []
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190 backups = profile_dict['Backups'].split(':')
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191 backups_dirs = []
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192 for backup in backups:
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193 if os.path.isabs(backup):
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194 backup_dir = backup
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195 else:
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196 backup_dir = os.path.join(self.profile_dir, self.backups_dir, backup)
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197 backups_dirs.append((backup, int(os.path.getmtime(backup_dir))))
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198 # TODO: check if the getmtime == the datestamp for relative backups
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199
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200 # sort by reverse datestamp
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201 backups_dirs.sort(key=lambda x: x[1], reverse=True)
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202
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203 # format to datestamps, if applicable
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204 if datestamp:
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205 backups_dirs = [ (i[0], time.strftime(datestamp,
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206 time.localtime(int(i[1]))))
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207 for i in backups_dirs ]
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208
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209 return backups_dirs
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210
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211 def restore(self, profile, date=None, delete=False):
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212 """
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213 restore the profile from a backup
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214 the most recent backup is used unless `date` is given
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215 - date : date to restore from (will not delete)
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216 - delete : delete the backup after restoration
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217 """
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218
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219 assert not (date and delete), 'date and delete cannot be used in conjunction'
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220
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221 # get the possible backups
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222 backups = self.backups(profile)
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223 # TODO: check to see if these all exist (print warnings if not)
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224
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225 # determine the backup to use
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226 if date:
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227
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228 if isinstance(date, basestring):
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229
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230 # test for s since epoch
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231 seconds_snice_epoch = None
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232 try:
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233 seconds_since_epoch = int(date)
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234
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235 except ValueError:
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236 pass
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237 if seconds_since_epoch and seconds_since_epoch > time.localtime().tm_year:
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238 date = seconds_since_epoch
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239 else:
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240 date = parse(date) # parse date from string
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241
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242 if isinstance(date, datetime):
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243 # convert to s since epoch
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244 date = time.mktime(date.timetuple())
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245
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246 for backup in backups:
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247 raise NotImplementedError
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248 else:
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249 if not backups:
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250 raise NoBackupError("No backups for profile %s in %s" % (profile, self.profiles))
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251 backups = backups[0][0]
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252
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253 # restore the backup over ``profile``
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254
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255
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256 if delete: # delete the backup
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257 # delete the directory
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258 # delete the entry from ``profiles.ini``
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259 # if there are no backups, delete the ``backups`` line
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260 pass #TODO
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261
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262 def temporary(self):
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263 """make a temporary profile"""
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264 raise NotImplementedError
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265
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266 def merge(self, output, *profiles):
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267 """merge a set of profiles (not trivial!)"""
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268 raise NotImplementedError
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269
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270 ### internal functions
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271
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272 def add(self, profile, path, relative=True):
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273 """
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274 add a profile entry to profiles.ini
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275 """
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276
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277 # ensure name is not already present
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278 assert profile not in self.profiles_dict(), 'Profile "%s" already in %s' % (name, self.profiles)
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279 parser = self.parser()
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280
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281 # find and add the section
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282 ctr = 0
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283 section = 'Profile%d' % ctr # unsure of this naming convention
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284 while section in parser.sections():
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285 ctr += 1
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286 section = 'Profile%d' % ctr
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287 parser.add_section(section)
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288
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289 # add metadata
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290 parser.set(section, 'Name', profile)
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291 parser.set(section, 'IsRelative', '%d' % int(relative))
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292 parser.set(section, 'Path', path)
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293 if not ctr:
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294 parser.set(section, 'Default', '1')
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295
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296 # write the file
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297 self.write(parser)
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298
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299 def path(self, profile):
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300 """returns the path to the profile"""
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301 profile = self.profile_dict(profile)
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302 if profile.get('IsRelative', None) == '1':
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303 return os.path.join(self.profile_dir, profile['Path'])
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304 return profile['Path']
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305
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306 def parser(self):
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307 """
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308 return a ConfigParser instance appropriate to profiles.ini
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309 """
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310 parser = ConfigParser()
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311 parser.optionxform = str
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312 parser.read(self.profiles)
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313 return parser
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314
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315 def write(self, parser):
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316 f = file(self.profiles, 'w')
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317 parser.write(f)
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318 f.close()
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319
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320 def section(self, profile, parser=None):
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321 """
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322 returns the name of the section that a profile is in or None
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323 if not found
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324 """
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325 if parser is None:
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326 parser = self.parser()
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327 for section in parser.sections():
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328 if not parser.has_option(section, 'Name'):
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329 continue # not a profile
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330 if parser.get(section, 'Name') == profile:
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331 return section
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332
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333 def profile_dict(self, profile):
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334 """
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335 return option dictionary for a single profile
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336 """
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337 parser = self.parser()
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338 section = self.section(profile, parser)
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339 if section is None:
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340 raise ProfileNotFound(profile, self.profiles)
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341 return dict(parser.items(section))
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342
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343 def profiles_dict(self):
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344 """
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345 return nested dict of all profiles
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346 """
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347 # assumes profiles have unique names
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348 parser = self.parser()
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349 retval = {}
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350 for section in parser.sections():
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351 if section == 'General':
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352 continue
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353 if not parser.has_option(section, 'Name'):
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354 continue
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355 name = parser.get(section, 'Name')
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356 retval[name] = self.profile_dict(name)
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357 return retval
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358
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359 def hash(self):
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360 """
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361 generate a random hash for a new profile
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362 """
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363 population = string.lowercase + string.digits
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364 return ''.join(Random().sample(population, 8))
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365
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366