Mercurial > hg
annotate mercurial/pathutil.py @ 20294:243ea5ffdf31
diff: search beyond ancestor when detecting renames
This removes an optimization that was introduced in 91eb4512edd0 but was too
aggressive - as indicated by how it changed test-mq-merge.t .
We are walking filelogs to find copy sources and we can thus not be sure to hit
the base revision and find the renamed file there - it could also be in the
first ancestor of the base ... in the filelog.
We are walking the filelog and can thus not easily know when we hit the first
ancestor of the base revision and which filename to look for there. Instead, we
use _findlimit like mergecopies do: The lower bound for how far we have to go
is found from the lowest changelog revision that is an ancestor of only one of
the compared revisions. Any filelog ancestor with a revision number lower than
that revision will be the ancestor of both compared revisions, and there is
thus no reason to go further back than that.
author | Mads Kiilerich <madski@unity3d.com> |
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date | Sat, 16 Nov 2013 15:46:29 -0500 |
parents | f962870712da |
children | 8dd17b19e722 |
rev | line source |
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20033
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1 import os, errno, stat |
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2 |
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3 import util |
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4 from i18n import _ |
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5 |
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6 class pathauditor(object): |
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7 '''ensure that a filesystem path contains no banned components. |
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8 the following properties of a path are checked: |
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9 |
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10 - ends with a directory separator |
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11 - under top-level .hg |
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12 - starts at the root of a windows drive |
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13 - contains ".." |
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14 - traverses a symlink (e.g. a/symlink_here/b) |
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15 - inside a nested repository (a callback can be used to approve |
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16 some nested repositories, e.g., subrepositories) |
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17 ''' |
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18 |
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19 def __init__(self, root, callback=None): |
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20 self.audited = set() |
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21 self.auditeddir = set() |
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22 self.root = root |
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23 self.callback = callback |
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24 if os.path.lexists(root) and not util.checkcase(root): |
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25 self.normcase = util.normcase |
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26 else: |
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27 self.normcase = lambda x: x |
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28 |
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29 def __call__(self, path): |
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30 '''Check the relative path. |
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31 path may contain a pattern (e.g. foodir/**.txt)''' |
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32 |
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33 path = util.localpath(path) |
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34 normpath = self.normcase(path) |
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35 if normpath in self.audited: |
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36 return |
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37 # AIX ignores "/" at end of path, others raise EISDIR. |
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38 if util.endswithsep(path): |
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39 raise util.Abort(_("path ends in directory separator: %s") % path) |
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40 parts = util.splitpath(path) |
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41 if (os.path.splitdrive(path)[0] |
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42 or parts[0].lower() in ('.hg', '.hg.', '') |
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43 or os.pardir in parts): |
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44 raise util.Abort(_("path contains illegal component: %s") % path) |
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45 if '.hg' in path.lower(): |
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46 lparts = [p.lower() for p in parts] |
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47 for p in '.hg', '.hg.': |
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48 if p in lparts[1:]: |
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49 pos = lparts.index(p) |
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50 base = os.path.join(*parts[:pos]) |
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51 raise util.Abort(_("path '%s' is inside nested repo %r") |
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52 % (path, base)) |
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53 |
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54 normparts = util.splitpath(normpath) |
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55 assert len(parts) == len(normparts) |
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56 |
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57 parts.pop() |
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58 normparts.pop() |
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59 prefixes = [] |
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60 while parts: |
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61 prefix = os.sep.join(parts) |
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62 normprefix = os.sep.join(normparts) |
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63 if normprefix in self.auditeddir: |
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64 break |
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65 curpath = os.path.join(self.root, prefix) |
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66 try: |
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67 st = os.lstat(curpath) |
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68 except OSError, err: |
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69 # EINVAL can be raised as invalid path syntax under win32. |
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70 # They must be ignored for patterns can be checked too. |
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71 if err.errno not in (errno.ENOENT, errno.ENOTDIR, errno.EINVAL): |
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72 raise |
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73 else: |
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74 if stat.S_ISLNK(st.st_mode): |
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75 raise util.Abort( |
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76 _('path %r traverses symbolic link %r') |
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77 % (path, prefix)) |
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78 elif (stat.S_ISDIR(st.st_mode) and |
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79 os.path.isdir(os.path.join(curpath, '.hg'))): |
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80 if not self.callback or not self.callback(curpath): |
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81 raise util.Abort(_("path '%s' is inside nested " |
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82 "repo %r") |
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83 % (path, prefix)) |
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84 prefixes.append(normprefix) |
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85 parts.pop() |
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86 normparts.pop() |
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87 |
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88 self.audited.add(normpath) |
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89 # only add prefixes to the cache after checking everything: we don't |
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90 # want to add "foo/bar/baz" before checking if there's a "foo/.hg" |
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91 self.auditeddir.update(prefixes) |
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92 |
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93 def check(self, path): |
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94 try: |
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95 self(path) |
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96 return True |
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97 except (OSError, util.Abort): |
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98 return False |
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99 |
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100 def canonpath(root, cwd, myname, auditor=None): |
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101 '''return the canonical path of myname, given cwd and root''' |
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102 if util.endswithsep(root): |
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103 rootsep = root |
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104 else: |
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105 rootsep = root + os.sep |
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106 name = myname |
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107 if not os.path.isabs(name): |
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108 name = os.path.join(root, cwd, name) |
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109 name = os.path.normpath(name) |
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110 if auditor is None: |
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111 auditor = pathauditor(root) |
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112 if name != rootsep and name.startswith(rootsep): |
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113 name = name[len(rootsep):] |
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114 auditor(name) |
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115 return util.pconvert(name) |
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116 elif name == root: |
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117 return '' |
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118 else: |
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119 # Determine whether `name' is in the hierarchy at or beneath `root', |
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120 # by iterating name=dirname(name) until that causes no change (can't |
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121 # check name == '/', because that doesn't work on windows). The list |
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122 # `rel' holds the reversed list of components making up the relative |
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123 # file name we want. |
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124 rel = [] |
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125 while True: |
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126 try: |
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127 s = util.samefile(name, root) |
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128 except OSError: |
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129 s = False |
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130 if s: |
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131 if not rel: |
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132 # name was actually the same as root (maybe a symlink) |
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133 return '' |
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134 rel.reverse() |
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135 name = os.path.join(*rel) |
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136 auditor(name) |
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137 return util.pconvert(name) |
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138 dirname, basename = util.split(name) |
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139 rel.append(basename) |
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140 if dirname == name: |
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141 break |
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142 name = dirname |
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143 |
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144 raise util.Abort(_("%s not under root '%s'") % (myname, root)) |