Mercurial > hg
annotate hgext/convert/subversion.py @ 4765:b6a1f2c46c6c
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author | Daniel Holth <dholth@fastmail.fm> |
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date | Sun, 01 Jul 2007 23:56:11 +0200 |
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children | 95cbb6b74790 |
rev | line source |
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4765
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1 # Subversion 1.4/1.5 Python API backend |
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2 # |
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3 # Copyright(C) 2007 Daniel Holth et al |
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4 |
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5 import pprint |
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6 import locale |
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7 |
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8 from mercurial import util |
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9 |
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10 # Subversion stuff. Works best with very recent Python SVN bindings |
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11 # e.g. SVN 1.5 or backports. Thanks to the bzr folks for enhancing |
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12 # these bindings. |
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13 |
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14 from svn.core import SubversionException, Pool |
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15 import svn.core |
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16 import svn.ra |
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17 import svn.delta |
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18 import svn |
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19 import transport |
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20 from cStringIO import StringIO |
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21 |
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22 from common import NoRepo, commit, converter_source, recode, nocommitmsg |
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23 |
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24 class CompatibilityException(Exception): pass |
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25 |
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26 nbRevisionsPerFetch = 50 |
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27 |
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28 class svn_entry(object): |
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29 """Emulate a Subversion path change.""" |
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30 __slots__ = ['path', 'copyfrom_path', 'copyfrom_rev', 'action'] |
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31 def __init__(self, entry): |
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32 self.copyfrom_path = entry.copyfrom_path |
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33 self.copyfrom_rev = entry.copyfrom_rev |
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34 self.action = entry.action |
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35 |
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36 def __str__(self): |
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37 return "%s %s %s" % (self.action, self.copyfrom_path, self.copyfrom_rev) |
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38 |
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39 def __repr__(self): |
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40 return self.__str__() |
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41 |
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42 class svn_paths(object): |
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43 """Emulate a Subversion ordered dictionary of changed paths.""" |
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44 __slots__ = ['values', 'order'] |
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45 def __init__(self, orig_paths): |
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46 self.order = [] |
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47 self.values = {} |
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48 if hasattr(orig_paths, 'keys'): |
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49 self.order = sorted(orig_paths.keys()) |
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50 self.values.update(orig_paths) |
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51 return |
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52 if not orig_paths: |
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53 return |
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54 for path in orig_paths: |
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55 self.order.append(path) |
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56 self.values[path] = svn_entry(orig_paths[path]) |
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57 self.order.sort() # maybe the order it came in isn't so great... |
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58 |
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59 def __iter__(self): |
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60 return iter(self.order) |
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61 |
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62 def __getitem__(self, key): |
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63 return self.values[key] |
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64 |
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65 def __str__(self): |
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66 s = "{\n" |
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67 for path in self.order: |
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68 s += "'%s': %s,\n" % (path, self.values[path]) |
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69 s += "}" |
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70 return s |
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71 |
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72 def __repr__(self): |
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73 return self.__str__() |
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74 |
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75 # SVN conversion code stolen from bzr-svn and tailor |
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76 class convert_svn(converter_source): |
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77 def __init__(self, ui, url): |
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78 self.ui = ui |
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79 self.encoding = locale.getpreferredencoding() |
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80 try: |
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81 # Support file://path@rev syntax. Useful e.g. to convert |
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82 # deleted branches. |
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83 url, latest = url.rsplit("@", 1) |
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84 latest = int(latest) |
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85 except ValueError, e: |
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86 latest = None |
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87 self.url = url |
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88 self.encoding = 'UTF-8' # Subversion is always nominal UTF-8 |
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89 try: |
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90 self.transport = transport.SvnRaTransport(url = url) |
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91 self.ra = self.transport.ra |
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92 self.base = svn.ra.get_repos_root(self.ra) |
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93 self.module = self.url[len(self.base):] |
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94 self.modulemap = {} # revision, module |
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95 self.commits = {} |
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96 self.files = {} |
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97 self.uuid = svn.ra.get_uuid(self.ra).decode(self.encoding) |
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98 except SubversionException, e: |
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99 raise NoRepo("couldn't open SVN repo %s" % url) |
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100 |
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101 try: |
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102 self.get_blacklist() |
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103 except IOError, e: |
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104 pass |
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105 |
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106 if not latest: |
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107 latest = svn.ra.get_latest_revnum(self.ra) |
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108 dirent = svn.ra.stat(self.ra, self.module, latest) |
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109 self.last_changed = dirent.created_rev |
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110 |
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111 self.head = self.rev(self.last_changed) |
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112 |
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113 # Should lazily fetch revisions in batches of, say, 1,000...: |
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114 self._fetch_revisions(from_revnum=self.last_changed, to_revnum=0) |
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115 |
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116 def rev(self, revnum): |
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117 return (u"svn:%s%s@%s" % (self.uuid, self.module, revnum)).decode(self.encoding) |
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118 |
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119 def get_blacklist(self): |
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120 """Avoid certain revision numbers. |
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121 It is not uncommon for two nearby revisions to cancel each other |
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122 out, e.g. 'I copied trunk into a subdirectory of itself instead |
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123 of making a branch'. The converted repository is significantly |
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124 smaller if we ignore such revisions.""" |
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125 self.blacklist = set() |
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126 blacklist = self.blacklist |
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127 for line in file("blacklist.txt", "r"): |
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128 if not line.startswith("#"): |
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129 try: |
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130 svn_rev = int(line.strip()) |
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131 blacklist.add(svn_rev) |
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132 except ValueError, e: |
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133 pass # not an integer or a comment |
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134 |
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135 def is_blacklisted(self, svn_rev): |
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136 return svn_rev in self.blacklist |
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137 |
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138 def reparent(self, module): |
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139 svn_url = self.base + module |
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140 self.ui.debug("reparent to %s\n" % svn_url.encode(self.encoding)) |
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141 svn.ra.reparent(self.ra, svn_url.encode(self.encoding)) |
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142 |
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143 def _fetch_revisions(self, from_revnum = 0, to_revnum = 347, pb=None): |
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144 self.parent_cset = None |
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145 self.child_cset = None |
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146 |
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147 self.ui.debug('Fetching revisions %d to %d\n' % (from_revnum, to_revnum)) |
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148 |
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149 def get_entry_from_path(path, module=self.module): |
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150 # Given the repository url of this wc, say |
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151 # "http://server/plone/CMFPlone/branches/Plone-2_0-branch" |
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152 # extract the "entry" portion (a relative path) from what |
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153 # svn log --xml says, ie |
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154 # "/CMFPlone/branches/Plone-2_0-branch/tests/PloneTestCase.py" |
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155 # that is to say "tests/PloneTestCase.py" |
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156 |
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157 if path.startswith(module): |
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158 relative = path[len(module):] |
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159 if relative.startswith('/'): |
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160 return relative[1:] |
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161 else: |
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162 return relative |
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163 |
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164 # The path is outside our tracked tree... |
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165 self.ui.debug('Ignoring %r since it is not under %r\n' % (path, module)) |
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166 return None |
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167 |
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168 received = [] |
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169 def rcvr(*arg, **args): |
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170 orig_paths, revnum, author, date, message, pool = arg |
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171 new_orig_paths = svn_paths(orig_paths) |
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172 rcvr2(new_orig_paths, revnum, author, date, message, pool) |
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173 |
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174 def rcvr2(orig_paths, revnum, author, date, message, pool, better_paths = None): |
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175 if not self.is_blacklisted(revnum): |
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176 received.append((orig_paths, revnum, author, date, message)) |
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177 |
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178 def after_received(orig_paths, revnum, author, date, message): |
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179 if revnum == 1172: |
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180 import pdb |
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181 pdb.set_trace() |
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182 if revnum in self.modulemap: |
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183 new_module = self.modulemap[revnum] |
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184 if new_module != self.module: |
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185 self.module = new_module |
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186 self.reparent(self.module) |
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187 |
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188 copyfrom = {} # Map of entrypath, revision for finding source of deleted revisions. |
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189 copies = {} |
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190 entries = [] |
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191 self.ui.debug("Parsing revision %d\n" % revnum) |
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192 if orig_paths is not None: |
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193 rev = self.rev(revnum) |
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194 try: |
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195 branch = self.module.split("/")[-1] |
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196 except IndexError: |
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197 branch = None |
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198 |
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199 for path in orig_paths: |
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200 # self.ui.write("path %s\n" % path) |
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201 if path == self.module: # Follow branching back in history |
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202 ent = orig_paths[path] |
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203 if ent: |
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204 if ent.copyfrom_path: |
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205 self.modulemap[ent.copyfrom_rev] = ent.copyfrom_path |
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206 else: |
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207 self.ui.debug("No copyfrom path, don't know what to do.\n") |
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208 # Maybe it was added and there is no more history. |
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209 entrypath = get_entry_from_path(path, module=self.module) |
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210 # self.ui.write("entrypath %s\n" % entrypath) |
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211 if not entrypath: |
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212 # Outside our area of interest |
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213 self.ui.debug("boring@%s: %s\n" % (revnum, path)) |
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214 continue |
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215 entry = entrypath.decode(self.encoding) |
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216 ent = orig_paths[path] |
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217 |
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218 kind = svn.ra.check_path(self.ra, entrypath, revnum) |
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219 if kind == svn.core.svn_node_file: |
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220 if ent.copyfrom_path: |
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221 copyfrom_path = get_entry_from_path(ent.copyfrom_path) |
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222 if copyfrom_path: |
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223 self.ui.debug("Copied to %s from %s@%s\n" % (entry, copyfrom_path, ent.copyfrom_rev)) |
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224 # It's probably important for hg that the source |
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225 # exists in the revision's parent, not just the |
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226 # ent.copyfrom_rev |
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227 fromkind = svn.ra.check_path(self.ra, copyfrom_path, ent.copyfrom_rev) |
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228 if fromkind != 0: |
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229 copies[self.recode(entry)] = self.recode(copyfrom_path) |
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230 entries.append(self.recode(entry)) |
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231 elif kind == 0: # gone, but had better be a deleted *file* |
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232 self.ui.debug("gone from %s\n" % ent.copyfrom_rev) |
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233 |
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234 fromrev = revnum - 1 |
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235 # might always need to be revnum - 1 in these 3 lines? |
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236 old_module = self.modulemap.get(fromrev, self.module) |
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237 basepath = old_module + "/" + get_entry_from_path(path, module=self.module) |
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238 entrypath = old_module + "/" + get_entry_from_path(path, module=self.module) |
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239 |
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240 def lookup_parts(p): |
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241 rc = None |
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242 parts = p.split("/") |
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243 for i in range(len(parts)): |
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244 part = "/".join(parts[:i]) |
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245 info = part, copyfrom.get(part, None) |
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246 if info[1] is not None: |
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247 self.ui.debug("Found parent directory %s\n" % info) |
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248 rc = info |
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249 return rc |
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250 |
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251 self.ui.debug("base, entry %s %s\n" % (basepath, entrypath)) |
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252 |
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253 frompath, froment = lookup_parts(entrypath) or (None, revnum - 1) |
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254 |
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255 # need to remove fragment from lookup_parts and replace with copyfrom_path |
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256 if frompath is not None: |
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257 self.ui.debug("munge-o-matic\n") |
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258 self.ui.debug(entrypath + '\n') |
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259 self.ui.debug(entrypath[len(frompath):] + '\n') |
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260 entrypath = froment.copyfrom_path + entrypath[len(frompath):] |
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261 fromrev = froment.copyfrom_rev |
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262 self.ui.debug("Info: %s %s %s %s\n" % (frompath, froment, ent, entrypath)) |
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263 |
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264 fromkind = svn.ra.check_path(self.ra, entrypath, fromrev) |
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265 if fromkind == svn.core.svn_node_file: # a deleted file |
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266 entries.append(self.recode(entry)) |
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267 else: |
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268 # print "Deleted/moved non-file:", revnum, path, ent |
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269 # children = self._find_children(path, revnum - 1) |
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270 # print "find children %s@%d from %d action %s" % (path, revnum, ent.copyfrom_rev, ent.action) |
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271 # Sometimes this is tricky. For example: in |
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272 # The Subversion Repository revision 6940 a dir |
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273 # was copied and one of its files was deleted |
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274 # from the new location in the same commit. This |
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275 # code can't deal with that yet. |
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276 if ent.action == 'C': |
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277 children = self._find_children(path, fromrev) |
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278 else: |
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279 oroot = entrypath.strip('/') |
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280 nroot = path.strip('/') |
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281 children = self._find_children(oroot, fromrev) |
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282 children = [s.replace(oroot,nroot) for s in children] |
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283 # Mark all [files, not directories] as deleted. |
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284 for child in children: |
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285 # Can we move a child directory and its |
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286 # parent in the same commit? (probably can). Could |
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287 # cause problems if instead of revnum -1, |
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288 # we have to look in (copyfrom_path, revnum - 1) |
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289 entrypath = get_entry_from_path("/" + child, module=old_module) |
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290 if entrypath: |
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291 entry = self.recode(entrypath.decode(self.encoding)) |
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292 if entry in copies: |
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293 # deleted file within a copy |
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294 del copies[entry] |
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295 else: |
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296 entries.append(entry) |
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297 elif kind == svn.core.svn_node_dir: |
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298 # Should probably synthesize normal file entries |
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299 # and handle as above to clean up copy/rename handling. |
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300 |
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301 # If the directory just had a prop change, |
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302 # then we shouldn't need to look for its children. |
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303 # Also this could create duplicate entries. Not sure |
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304 # whether this will matter. Maybe should make entries a set. |
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305 # print "Changed directory", revnum, path, ent.action, ent.copyfrom_path, ent.copyfrom_rev |
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306 # This will fail if a directory was copied |
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307 # from another branch and then some of its files |
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308 # were deleted in the same transaction. |
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309 children = self._find_children(path, revnum) |
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310 children.sort() |
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311 for child in children: |
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312 # Can we move a child directory and its |
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313 # parent in the same commit? (probably can). Could |
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314 # cause problems if instead of revnum -1, |
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315 # we have to look in (copyfrom_path, revnum - 1) |
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316 entrypath = get_entry_from_path("/" + child, module=self.module) |
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317 # print child, self.module, entrypath |
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318 if entrypath: |
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319 # Need to filter out directories here... |
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320 kind = svn.ra.check_path(self.ra, entrypath, revnum) |
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321 if kind != svn.core.svn_node_dir: |
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322 entries.append(self.recode(entrypath)) |
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323 |
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324 # Copies here (must copy all from source) |
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325 # Probably not a real problem for us if |
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326 # source does not exist |
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327 |
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328 # Can do this with the copy command "hg copy" |
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329 # if ent.copyfrom_path: |
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330 # copyfrom_entry = get_entry_from_path(ent.copyfrom_path.decode(self.encoding), |
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331 # module=self.module) |
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332 # copyto_entry = entrypath |
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333 # |
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334 # print "copy directory", copyfrom_entry, 'to', copyto_entry |
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335 # |
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336 # copies.append((copyfrom_entry, copyto_entry)) |
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337 |
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338 if ent.copyfrom_path: |
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339 copyfrom_path = ent.copyfrom_path.decode(self.encoding) |
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340 copyfrom_entry = get_entry_from_path(copyfrom_path, module=self.module) |
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341 if copyfrom_entry: |
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342 copyfrom[path] = ent |
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343 self.ui.debug("mark %s came from %s\n" % (path, copyfrom[path])) |
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344 |
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345 # Good, /probably/ a regular copy. Really should check |
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346 # to see whether the parent revision actually contains |
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347 # the directory in question. |
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348 children = self._find_children(self.recode(copyfrom_path), ent.copyfrom_rev) |
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349 children.sort() |
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350 for child in children: |
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351 entrypath = get_entry_from_path("/" + child, module=self.module) |
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352 if entrypath: |
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353 entry = entrypath.decode(self.encoding) |
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354 # print "COPY COPY From", copyfrom_entry, entry |
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355 copyto_path = path + entry[len(copyfrom_entry):] |
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356 copyto_entry = get_entry_from_path(copyto_path, module=self.module) |
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357 # print "COPY", entry, "COPY To", copyto_entry |
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358 copies[self.recode(copyto_entry)] = self.recode(entry) |
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359 # copy from quux splort/quuxfile |
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360 |
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361 self.modulemap[revnum] = self.module # track backwards in time |
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362 # a list of (filename, id) where id lets us retrieve the file. |
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363 # eg in git, id is the object hash. for svn it'll be the |
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364 self.files[rev] = zip(entries, [rev] * len(entries)) |
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365 |
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366 # Example SVN datetime. Includes microseconds. |
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367 # ISO-8601 conformant |
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368 # '2007-01-04T17:35:00.902377Z' |
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369 date = util.parsedate(date[:18] + " UTC", ["%Y-%m-%dT%H:%M:%S"]) |
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370 |
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371 log = message and self.recode(message) or nocommitmsg |
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372 author = author and self.recode(author) or '' |
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373 |
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374 cset = commit(author=author, |
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375 date=util.datestr(date), |
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376 desc=log, |
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377 parents=[], |
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378 copies=copies, |
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379 branch=branch) |
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380 |
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381 if self.child_cset is not None: |
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382 self.child_cset.parents = [rev] |
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383 |
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384 self.child_cset = cset |
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385 |
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386 self.commits[rev] = cset |
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387 |
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388 try: |
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389 discover_changed_paths = True |
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390 strict_node_history = False |
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391 svn.ra.get_log(self.ra, [self.module], from_revnum, to_revnum, |
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392 0, discover_changed_paths, strict_node_history, rcvr) |
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393 for args in received: |
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394 after_received(*args) |
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395 self.last_revnum = to_revnum |
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396 except SubversionException, (_, num): |
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397 if num == svn.core.SVN_ERR_FS_NO_SUCH_REVISION: |
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398 raise NoSuchRevision(branch=self, |
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399 revision="Revision number %d" % to_revnum) |
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400 raise |
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401 |
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402 def getheads(self): |
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403 # svn-url@rev |
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404 # Not safe if someone committed: |
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405 self.heads = [self.head] |
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406 # print self.commits.keys() |
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407 return self.heads |
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408 |
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409 def _getfile(self, file, rev): |
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410 io = StringIO() |
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411 # TODO: ra.get_file transmits the whole file instead of diffs. |
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412 mode = '' |
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413 try: |
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414 revnum = int(rev.split("@")[-1]) |
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415 if self.module != self.modulemap[revnum]: |
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416 self.module = self.modulemap[revnum] |
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417 self.reparent(self.module) |
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418 info = svn.ra.get_file(self.ra, file, revnum, io) |
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419 if isinstance(info, list): |
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420 info = info[-1] |
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421 mode = ("svn:executable" in info) and 'x' or '' |
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422 mode = ("svn:special" in info) and 'l' or mode |
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423 except SubversionException, e: |
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424 notfound = (svn.core.SVN_ERR_FS_NOT_FOUND, |
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425 svn.core.SVN_ERR_RA_DAV_PATH_NOT_FOUND) |
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426 if e.apr_err in notfound: # File not found |
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427 raise IOError() |
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428 raise |
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429 data = io.getvalue() |
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430 if mode == 'l': |
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431 link_prefix = "link " |
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432 if data.startswith(link_prefix): |
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433 data = data[len(link_prefix):] |
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434 return data, mode |
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435 |
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436 def getfile(self, file, rev): |
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437 data, mode = self._getfile(file, rev) |
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438 self.modecache[(file, rev)] = mode |
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439 return data |
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440 |
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441 def getmode(self, file, rev): |
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442 return self.modecache[(file, rev)] |
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443 |
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444 def getchanges(self, rev): |
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445 self.modecache = {} |
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446 files = self.files[rev] |
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447 cl = files |
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448 cl.sort() |
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449 return cl |
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450 |
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451 def getcommit(self, rev): |
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452 return self.commits[rev] |
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453 |
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454 def gettags(self): |
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455 return [] |
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456 |
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457 def _find_children(self, path, revnum): |
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458 path = path.strip("/") |
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459 |
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460 def _find_children_fallback(path, revnum): |
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461 # SWIG python bindings for getdir are broken up to at least 1.4.3 |
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462 if not hasattr(self, 'client_ctx'): |
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463 self.client_ctx = svn.client.create_context() |
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464 optrev = svn.core.svn_opt_revision_t() |
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465 optrev.kind = svn.core.svn_opt_revision_number |
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466 optrev.value.number = revnum |
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467 rpath = '/'.join([self.url, path]).strip('/') |
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468 return ['%s/%s' % (path, x) for x in svn.client.ls(rpath, optrev, True, self.client_ctx).keys()] |
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469 |
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470 if hasattr(self, '_find_children_fallback'): |
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471 return _find_children_fallback(path, revnum) |
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472 |
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473 self.reparent("/" + path) |
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474 pool = Pool() |
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475 |
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476 children = [] |
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477 def find_children_inner(children, path, revnum = revnum): |
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478 if hasattr(svn.ra, 'get_dir2'): # Since SVN 1.4 |
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479 fields = 0xffffffff # Binding does not provide SVN_DIRENT_ALL |
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480 getdir = svn.ra.get_dir2(self.ra, path, revnum, fields, pool) |
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481 else: |
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482 getdir = svn.ra.get_dir(self.ra, path, revnum, pool) |
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483 if type(getdir) == dict: |
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484 # python binding for getdir is broken up to at least 1.4.3 |
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485 raise CompatibilityException() |
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486 dirents = getdir[0] |
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487 if type(dirents) == int: |
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488 # got here once due to infinite recursion bug |
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489 # pprint.pprint(getdir) |
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490 return |
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491 c = dirents.keys() |
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492 c.sort() |
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493 for child in c: |
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494 dirent = dirents[child] |
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495 if dirent.kind == svn.core.svn_node_dir: |
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496 find_children_inner(children, (path + "/" + child).strip("/")) |
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497 else: |
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498 children.append((path + "/" + child).strip("/")) |
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499 |
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500 try: |
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501 find_children_inner(children, "") |
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502 except CompatibilityException: |
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503 self._find_children_fallback = True |
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504 self.reparent(self.module) |
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505 return _find_children_fallback(path, revnum) |
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506 |
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507 self.reparent(self.module) |
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508 return [path + "/" + c for c in children] |
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509 |
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510 def recode(self, s): |
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511 return recode(self.encoding, s) |