Mercurial > treepkg > treepkg

annotate treepkg/subversion.py @ 304:6cffb43a28ca

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Add a way to specify svn subset checkouts where only parts of a source tree are checked out. The subset can be specified in the configuration file on a per-track basis. This feature was already present for some of the kde enterprise packagers but is now part of the base classes.
author Bernhard Herzog <bh@intevation.de>
date Thu, 26 Nov 2009 20:20:57 +0000
parents df01eb4dbfc5
children d0acc0614de5
rev   line source
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1 # Copyright (C) 2007, 2008, 2009 by Intevation GmbH
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2 # Authors:
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3 # Bernhard Herzog <bh@intevation.de>
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4 #
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5 # This program is free software under the GPL (>=v2)
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6 # Read the file COPYING coming with the software for details.
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8 """Collection of subversion utility code"""
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9
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10 import os
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11 import shutil
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12 import re
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13 import StringIO
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14
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15 from lxml import etree
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16
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17 import run
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18 from cmdexpand import cmdexpand
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19 from util import extract_value_for_key
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22 class SubversionError(Exception):
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23
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24 """Base class for subversion specific errors raised by TreePKG"""
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27 class SubversionUrlMismatchError(SubversionError):
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28
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29 """The repository URL does not match the URL of a working copy"""
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32 def list_url(url):
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33 """Runs svn list with the given url and returns files listed as a list"""
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34 output = run.capture_output(cmdexpand("svn list $url", **locals()))
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35 return output.splitlines()
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36
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37 def checkout(url, localdir, revision=None, recurse=True):
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38 """Runs svn to checkout the repository at url into the localdir"""
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39 args = []
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40 if revision:
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41 args.extend(["--revision", revision])
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42 if not recurse:
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43 args.append("-N")
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44 run.call(cmdexpand("svn checkout -q @args $url $localdir", **locals()))
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46 def update(localdir, revision=None, recurse=True):
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47 """Runs svn update on the localdir.
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48 The parameter revision, if given, is passed to svn as the value of
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49 the --revision option.
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50 """
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51 args = []
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52 if revision:
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53 args.extend(["--revision", revision])
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54 if not recurse:
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55 args.append("-N")
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56 run.call(cmdexpand("svn update -q @args $localdir", **locals()))
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58 def export(src, dest, revision=None, recurse=True):
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59 """Runs svn export src dest"""
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60 args = []
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61 if revision:
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62 args.extend(["--revision", revision])
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63 if not recurse:
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64 args.append("-N")
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65 run.call(cmdexpand("svn export -q @args $src $dest", **locals()))
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66
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67 def last_changed_revision(svn_working_copy):
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68 """return the last changed revision of an SVN working copy as an int"""
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69 # Make sure we run svn under the C locale to avoid localized
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70 # messages
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71 env = os.environ.copy()
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72 env["LANG"] = "C"
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73
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74 output = run.capture_output(cmdexpand("svn info $svn_working_copy",
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75 **locals()),
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76 env=env)
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77 str_rev = extract_value_for_key(output.splitlines(), "Last Changed Rev:")
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78 if str_rev is None:
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79 raise SubversionError("Cannot determine last changed revision for %r"
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80 % svn_working_copy)
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81 return int(str_rev)
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83 def svn_url(url_or_working_copy):
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84 """Returns the URL used for the working copy in svn_working_copy"""
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85 # Make sure we run svn under the C locale to avoid localized
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86 # messages
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87 env = os.environ.copy()
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88 env["LANG"] = "C"
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89
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90 output = run.capture_output(cmdexpand("svn info $url_or_working_copy",
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91 **locals()),
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92 env=env)
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93 return extract_value_for_key(output.splitlines(), "URL:")
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95 def log_xml(url, base_revision):
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96 """Return the log in XML of the repository at url from base_revision to HEAD
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97 """
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98 args = ["--revision", str(base_revision) + ":HEAD",
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99 "--verbose",
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100 "--xml"]
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101 return run.capture_output(cmdexpand("svn log @args $url", **locals()))
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102
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103
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104 def extract_tag_revisions(xml_log):
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105 """Extracts the revisions which changed an SVN tag since its creation
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106 This includes the revision which created the tag and all subsequent
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107 changes. The xml_log parameter should contain the xml-Version of
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108 the SVN log of the tag that includes at least the revision that
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109 created the tag and all the newer revisions.
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110 """
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111 tree = etree.parse(StringIO.StringIO(xml_log))
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112 tag_revisions = tree.xpath("logentry/@revision"
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113 "[.>=../../logentry/@revision"
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114 "[../paths/path[@copyfrom-path]]]")
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115 return tag_revisions
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118
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119 class SvnRepository(object):
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120
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121 """Describes a subversion repository"""
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122
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123 def __init__(self, url, external_subdirs=(), subset=()):
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124 """Initialize the subversion repository description
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125 Parameters:
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126 url -- The url of the repository
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127
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128 external_subdirs -- A list of subdirectories which are managed
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129 by svn externals definitions
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130
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131 subset -- A sequence of (filename, recurse) pairs where
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132 filename is a filename (usually a directory name)
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133 relative to url and recurse should be a boolean
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134 indicating whether checkout filename with recursion.
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135 If recurse is False, svn checkout/export will be
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136 called with the -N option.
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138 The first item in subset should be for '.', which
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139 indicates the top-level directory under url. If a
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140 non-empty subset is given this will usually be
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141 ('.', False) so that the top-level directory is not
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142 checked out recursively.
224
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143 """
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144 self.url = url
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145 self.external_subdirs = external_subdirs
304
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146 if not subset:
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147 # default subset is to checkout the top-level directory at
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148 # URL recursively. Alwas having a subset makes the code
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149 # simpler
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150 subset = [(".", True)]
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151 self.subset = subset
224
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152
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153 def checkout(self, localdir, revision=None):
304
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154 """Checks out the repository into localdir.
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155 The revision parameter should be an int and indicates the
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156 revision to check out or it should be None to indicate that the
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157 newest version is to be checked out.
224
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158 """
304
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159 base_url = self.url
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160 if not base_url.endswith("/"):
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161 base_url += "/"
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162 subdir, recurse = self.subset[0]
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163 checkout(base_url + subdir, os.path.join(localdir, subdir),
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164 revision=revision, recurse=recurse)
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165 for subdir, recurse in self.subset[1:]:
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166 update(os.path.join(localdir, subdir), revision=revision,
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167 recurse=recurse)
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168 if len(self.subset) > 1 and revision is None:
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169 # do an additional update on the whole working copy after
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170 # creating a subset checkout so that svn info will show
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171 # revision numbers that match the entire working copy
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172 # (externals are handled elsewhere). The repository might
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173 # have been changed between the initial checkout of the
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174 # top-level directory and the updates for the
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175 # subdirectories.
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176 update(localdir, revision=revision)
224
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177
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178 def export(self, localdir, destdir):
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179 """Exports the working copy in localdir to destdir"""
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180 export(localdir, destdir)
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181 for subdir in self.external_subdirs:
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182 absdir = os.path.join(destdir, subdir)
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183 if not os.path.isdir(absdir):
228
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184 export(os.path.join(localdir, subdir), absdir)
224
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185
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186 def last_changed_revision(self, localdir):
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187 """Returns the last changed revision of the working copy in localdir"""
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188 return max([last_changed_revision(os.path.join(localdir, d))
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189 for d in [localdir] + list(self.external_subdirs)])
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190
303
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191 def check_working_copy(self, localdir):
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192 """Checks whether localdir contains a checkout of the
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193 repository. The check compares the expected URL with the one
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194 returned by svn info executed in localdir. Raises
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195 SubversionUrlMismatchError if the URLs do not match.
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196 """
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197 localurl = svn_url(localdir)
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198 expected_url = svn_url(self.url)
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199 if localurl != expected_url:
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200 raise SubversionUrlMismatchError("Working copy in %r has URL %r,"
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201 " expected %r"
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202 % (localdir, localurl,
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203 expected_url))
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204
224
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205
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206 class SvnWorkingCopy(object):
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207
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208 """Represents a checkout of a subversion repository"""
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209
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210 def __init__(self, repository, localdir, logger=None):
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211 """
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212 Initialize the working copy.
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213 Parameters:
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214 repository -- The SvnRepository instance describing the
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215 repository
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216 localdir -- The directory for the working copy
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217 logger -- logging object to use for some info/debug messages
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218 """
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219 self.repository = repository
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220 self.localdir = localdir
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221 self.logger = logger
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222
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223 def log_info(self, *args):
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224 if self.logger is not None:
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225 self.logger.info(*args)
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226
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227 def update_or_checkout(self, revision=None):
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228 """Updates the working copy or creates by checking out the repository"""
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229 if os.path.exists(self.localdir):
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230 self.log_info("Updating the working copy in %r", self.localdir)
303
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231 self.repository.check_working_copy(self.localdir)
224
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232 update(self.localdir, revision=revision)
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233 else:
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234 self.log_info("The working copy in %r doesn't exist yet."
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235 " Checking out from %r",
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236 self.localdir, self.repository.url)
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237 self.repository.checkout(self.localdir, revision=revision)
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238
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239 def export(self, destdir):
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240 """Exports the working copy to destdir"""
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241 self.repository.export(self.localdir, destdir)
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242
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243 def last_changed_revision(self):
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244 """Returns the last changed rev of the working copy"""
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245 return self.repository.last_changed_revision(self.localdir)
230
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246
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247
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248 class ManualWorkingCopy(object):
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249
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250 """A manually managed working copy"""
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251
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252 def __init__(self, directory):
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253 self.directory = directory
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254
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255 def update_or_checkout(self, revision=None, recurse=True):
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256 """This method does nothing"""
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257 pass
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258
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259 def export(self, destdir):
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260 """Copies the entire working copy to destdir"""
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261 shutil.copytree(self.directory, destdir)
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262
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263 def last_changed_revision(self):
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264 """Always returns 0"""
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265 return 0
273
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266
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267
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268 class TagDetector(object):
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269
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270 """Class to automatically find SVN tags and help package them
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271
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272 The tags are found using three parameters:
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273 url -- The base url of the SVN tags directory to use
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274 pattern -- A regular expression matching the subdirectories to
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275 consider in the tag directory specified by the url
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276 subdir -- A subdirectory of the directory matched by pattern to
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277 export and use to determine revision number
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278
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279 The subdir parameter is there to cope with the kdepim enterprise
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280 tags. The URL for a tag is of the form
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281 .../tags/kdepim/enterprise4.0.<date>.<rev> . Each such tag has
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282 subdirectories for kdepim, kdelibs, etc. The url and pattern are
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283 used to match the URL for the tag, and the subdir is used to select
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284 which part of the tag is meant.
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285
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286 The subdir also determines which SVN directory's revision number is
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287 used. Normally, just appending the subdir to the tag URL would be
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288 enough for this, but the situation is more complex for
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289 kdebase_workspace and kdebase_runtime, whose code comes from
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290 different subdirectories of the kdebase-4.X-branch subdirectory (for
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291 enterprise4 tags). Here the revision number must be taken from
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292 kdebase-4.X-branch, but the URL to use when exporting the sources,
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293 must refer to e.g. kdebase-4.1-branch/kdebase_workspace. To achieve
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294 that, subdir may contain slashes to indicate subdirectories of
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295 subdirectories, but only the first part of subdir (up to the first
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296 slash) is used when determining the revision number.
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297 """
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298
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299 def __init__(self, url, pattern, subdir):
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300 self.url = url
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301 self.pattern = re.compile(pattern)
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302 self.subdir = subdir
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303
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304 def list_tags(self):
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305 matches = []
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306 if self.url:
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307 for tag in list_url(self.url):
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308 if self.pattern.match(tag.rstrip("/")):
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309 matches.append(tag)
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310 return sorted(matches)
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311
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312 def newest_tag_revision(self):
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313 """Determines the newest tag revision and returns (tagurl, revno)
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314 If no tag can be found, the method returns the tuple (None, None).
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315 """
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316 candidates = self.list_tags()
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317 urlrev = (None, None)
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318 if candidates:
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319 newest = candidates[-1]
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320 urlrev = self.determine_revision(self.url + "/" + newest,
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321 self.subdir)
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322 return urlrev
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323
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324 def determine_revision(self, baseurl, subdir):
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325 urlrev = (None, None)
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326 revision_url = baseurl + "/" + subdir.split("/")[0]
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327 try:
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328 revision = last_changed_revision(revision_url)
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329 urlrev = (baseurl + "/" + subdir, revision)
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330 except SubversionError:
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331 pass
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332 return urlrev
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