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annotate mercurial/pathutil.py @ 44440:4cabeea6d214

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hgext: start building a library for simple hooks Many workflows depend on hooks to enforce certain policies, e.g. to prevent forced pushes. The Mercurial Guide includes some cases and Google can help finding others, but it can save users a lot of time if hg itself has a couple of examples for further customization. Differential Revision: https://phab.mercurial-scm.org/D6825
author Joerg Sonnenberger <joerg@bec.de>
date Sat, 07 Sep 2019 14:50:39 +0200
parents d52e3826cd4b
children 11f284c8c5e4
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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d740df4e96cf pathutil: use absolute_import
Gregory Szorc <gregory.szorc@gmail.com>
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1 from __future__ import absolute_import
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2
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3 import errno
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4 import os
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5 import posixpath
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6 import stat
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7
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8 from .i18n import _
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9 from . import (
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10 encoding,
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11 error,
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12 policy,
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13 pycompat,
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14 util,
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15 )
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16
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17 rustdirs = policy.importrust('dirstate', 'Dirs')
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18 parsers = policy.importmod('parsers')
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19
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20
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21 def _lowerclean(s):
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22 return encoding.hfsignoreclean(s.lower())
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23
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24
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25 class pathauditor(object):
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26 '''ensure that a filesystem path contains no banned components.
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27 the following properties of a path are checked:
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28
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29 - ends with a directory separator
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30 - under top-level .hg
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31 - starts at the root of a windows drive
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32 - contains ".."
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33
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34 More check are also done about the file system states:
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35 - traverses a symlink (e.g. a/symlink_here/b)
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36 - inside a nested repository (a callback can be used to approve
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37 some nested repositories, e.g., subrepositories)
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38
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39 The file system checks are only done when 'realfs' is set to True (the
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40 default). They should be disable then we are auditing path for operation on
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41 stored history.
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42
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43 If 'cached' is set to True, audited paths and sub-directories are cached.
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44 Be careful to not keep the cache of unmanaged directories for long because
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45 audited paths may be replaced with symlinks.
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46 '''
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47
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48 def __init__(self, root, callback=None, realfs=True, cached=False):
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49 self.audited = set()
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50 self.auditeddir = set()
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51 self.root = root
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52 self._realfs = realfs
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53 self._cached = cached
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54 self.callback = callback
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55 if os.path.lexists(root) and not util.fscasesensitive(root):
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56 self.normcase = util.normcase
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57 else:
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58 self.normcase = lambda x: x
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59
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60 def __call__(self, path, mode=None):
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61 '''Check the relative path.
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62 path may contain a pattern (e.g. foodir/**.txt)'''
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63
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64 path = util.localpath(path)
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65 normpath = self.normcase(path)
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66 if normpath in self.audited:
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67 return
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68 # AIX ignores "/" at end of path, others raise EISDIR.
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69 if util.endswithsep(path):
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70 raise error.Abort(_(b"path ends in directory separator: %s") % path)
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71 parts = util.splitpath(path)
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72 if (
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73 os.path.splitdrive(path)[0]
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74 or _lowerclean(parts[0]) in (b'.hg', b'.hg.', b'')
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75 or pycompat.ospardir in parts
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76 ):
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77 raise error.Abort(_(b"path contains illegal component: %s") % path)
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78 # Windows shortname aliases
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79 for p in parts:
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80 if b"~" in p:
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81 first, last = p.split(b"~", 1)
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82 if last.isdigit() and first.upper() in [b"HG", b"HG8B6C"]:
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83 raise error.Abort(
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84 _(b"path contains illegal component: %s") % path
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85 )
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86 if b'.hg' in _lowerclean(path):
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87 lparts = [_lowerclean(p) for p in parts]
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88 for p in b'.hg', b'.hg.':
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89 if p in lparts[1:]:
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90 pos = lparts.index(p)
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91 base = os.path.join(*parts[:pos])
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92 raise error.Abort(
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93 _(b"path '%s' is inside nested repo %r")
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94 % (path, pycompat.bytestr(base))
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95 )
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96
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97 normparts = util.splitpath(normpath)
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98 assert len(parts) == len(normparts)
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99
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100 parts.pop()
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101 normparts.pop()
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102 # It's important that we check the path parts starting from the root.
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103 # We don't want to add "foo/bar/baz" to auditeddir before checking if
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104 # there's a "foo/.hg" directory. This also means we won't accidentally
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105 # traverse a symlink into some other filesystem (which is potentially
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106 # expensive to access).
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107 for i in range(len(parts)):
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108 prefix = pycompat.ossep.join(parts[: i + 1])
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109 normprefix = pycompat.ossep.join(normparts[: i + 1])
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110 if normprefix in self.auditeddir:
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111 continue
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112 if self._realfs:
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113 self._checkfs(prefix, path)
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114 if self._cached:
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115 self.auditeddir.add(normprefix)
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116
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117 if self._cached:
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118 self.audited.add(normpath)
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119
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120 def _checkfs(self, prefix, path):
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121 """raise exception if a file system backed check fails"""
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122 curpath = os.path.join(self.root, prefix)
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123 try:
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124 st = os.lstat(curpath)
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125 except OSError as err:
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diff changeset
126 # EINVAL can be raised as invalid path syntax under win32.
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diff changeset
127 # They must be ignored for patterns can be checked too.
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diff changeset
128 if err.errno not in (errno.ENOENT, errno.ENOTDIR, errno.EINVAL):
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diff changeset
129 raise
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diff changeset
130 else:
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parents: 26587
diff changeset
131 if stat.S_ISLNK(st.st_mode):
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diff changeset
132 msg = _(b'path %r traverses symbolic link %r') % (
43076
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diff changeset
133 pycompat.bytestr(path),
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parents: 38593
diff changeset
134 pycompat.bytestr(prefix),
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parents: 38593
diff changeset
135 )
27235
054cd38a2f19 pathutil: use temporary variables instead of complicated wrapping
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parents: 27232
diff changeset
136 raise error.Abort(msg)
43076
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diff changeset
137 elif stat.S_ISDIR(st.st_mode) and os.path.isdir(
43077
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diff changeset
138 os.path.join(curpath, b'.hg')
43076
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parents: 38593
diff changeset
139 ):
27231
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diff changeset
140 if not self.callback or not self.callback(curpath):
43077
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Augie Fackler <augie@google.com>
parents: 43076
diff changeset
141 msg = _(b"path '%s' is inside nested repo %r")
36678
d3b893ec5f08 py3: fix formatting of path-auditing errors
Yuya Nishihara <yuya@tcha.org>
parents: 36676
diff changeset
142 raise error.Abort(msg % (path, pycompat.bytestr(prefix)))
27231
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parents: 26587
diff changeset
143
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diff changeset
144 def check(self, path):
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parents:
diff changeset
145 try:
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parents:
diff changeset
146 self(path)
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parents:
diff changeset
147 return True
26587
56b2bcea2529 error: get Abort from 'error' instead of 'util'
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parents: 25964
diff changeset
148 except (OSError, error.Abort):
20033
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parents:
diff changeset
149 return False
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parents:
diff changeset
150
43076
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diff changeset
151
20033
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diff changeset
152 def canonpath(root, cwd, myname, auditor=None):
34958
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parents: 34956
diff changeset
153 '''return the canonical path of myname, given cwd and root
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parents: 34956
diff changeset
154
705d0f2bb677 pathutil: add doctests for canonpath()
Matt Harbison <matt_harbison@yahoo.com>
parents: 34956
diff changeset
155 >>> def check(root, cwd, myname):
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Matt Harbison <matt_harbison@yahoo.com>
parents: 34956
diff changeset
156 ... a = pathauditor(root, realfs=False)
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parents: 34956
diff changeset
157 ... try:
705d0f2bb677 pathutil: add doctests for canonpath()
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parents: 34956
diff changeset
158 ... return canonpath(root, cwd, myname, a)
705d0f2bb677 pathutil: add doctests for canonpath()
Matt Harbison <matt_harbison@yahoo.com>
parents: 34956
diff changeset
159 ... except error.Abort:
705d0f2bb677 pathutil: add doctests for canonpath()
Matt Harbison <matt_harbison@yahoo.com>
parents: 34956
diff changeset
160 ... return 'aborted'
705d0f2bb677 pathutil: add doctests for canonpath()
Matt Harbison <matt_harbison@yahoo.com>
parents: 34956
diff changeset
161 >>> def unixonly(root, cwd, myname, expected='aborted'):
705d0f2bb677 pathutil: add doctests for canonpath()
Matt Harbison <matt_harbison@yahoo.com>
parents: 34956
diff changeset
162 ... if pycompat.iswindows:
705d0f2bb677 pathutil: add doctests for canonpath()
Matt Harbison <matt_harbison@yahoo.com>
parents: 34956
diff changeset
163 ... return expected
705d0f2bb677 pathutil: add doctests for canonpath()
Matt Harbison <matt_harbison@yahoo.com>
parents: 34956
diff changeset
164 ... return check(root, cwd, myname)
705d0f2bb677 pathutil: add doctests for canonpath()
Matt Harbison <matt_harbison@yahoo.com>
parents: 34956
diff changeset
165 >>> def winonly(root, cwd, myname, expected='aborted'):
705d0f2bb677 pathutil: add doctests for canonpath()
Matt Harbison <matt_harbison@yahoo.com>
parents: 34956
diff changeset
166 ... if not pycompat.iswindows:
705d0f2bb677 pathutil: add doctests for canonpath()
Matt Harbison <matt_harbison@yahoo.com>
parents: 34956
diff changeset
167 ... return expected
705d0f2bb677 pathutil: add doctests for canonpath()
Matt Harbison <matt_harbison@yahoo.com>
parents: 34956
diff changeset
168 ... return check(root, cwd, myname)
705d0f2bb677 pathutil: add doctests for canonpath()
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parents: 34956
diff changeset
169 >>> winonly(b'd:\\\\repo', b'c:\\\\dir', b'filename')
705d0f2bb677 pathutil: add doctests for canonpath()
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parents: 34956
diff changeset
170 'aborted'
705d0f2bb677 pathutil: add doctests for canonpath()
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parents: 34956
diff changeset
171 >>> winonly(b'c:\\\\repo', b'c:\\\\dir', b'filename')
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parents: 34956
diff changeset
172 'aborted'
705d0f2bb677 pathutil: add doctests for canonpath()
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parents: 34956
diff changeset
173 >>> winonly(b'c:\\\\repo', b'c:\\\\', b'filename')
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parents: 34956
diff changeset
174 'aborted'
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Matt Harbison <matt_harbison@yahoo.com>
parents: 34956
diff changeset
175 >>> winonly(b'c:\\\\repo', b'c:\\\\', b'repo\\\\filename',
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Matt Harbison <matt_harbison@yahoo.com>
parents: 34956
diff changeset
176 ... b'filename')
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Matt Harbison <matt_harbison@yahoo.com>
parents: 34956
diff changeset
177 'filename'
705d0f2bb677 pathutil: add doctests for canonpath()
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parents: 34956
diff changeset
178 >>> winonly(b'c:\\\\repo', b'c:\\\\repo', b'filename', b'filename')
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parents: 34956
diff changeset
179 'filename'
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parents: 34956
diff changeset
180 >>> winonly(b'c:\\\\repo', b'c:\\\\repo\\\\subdir', b'filename',
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parents: 34956
diff changeset
181 ... b'subdir/filename')
705d0f2bb677 pathutil: add doctests for canonpath()
Matt Harbison <matt_harbison@yahoo.com>
parents: 34956
diff changeset
182 'subdir/filename'
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Matt Harbison <matt_harbison@yahoo.com>
parents: 34956
diff changeset
183 >>> unixonly(b'/repo', b'/dir', b'filename')
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parents: 34956
diff changeset
184 'aborted'
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Matt Harbison <matt_harbison@yahoo.com>
parents: 34956
diff changeset
185 >>> unixonly(b'/repo', b'/', b'filename')
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parents: 34956
diff changeset
186 'aborted'
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parents: 34956
diff changeset
187 >>> unixonly(b'/repo', b'/', b'repo/filename', b'filename')
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parents: 34956
diff changeset
188 'filename'
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Matt Harbison <matt_harbison@yahoo.com>
parents: 34956
diff changeset
189 >>> unixonly(b'/repo', b'/repo', b'filename', b'filename')
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parents: 34956
diff changeset
190 'filename'
705d0f2bb677 pathutil: add doctests for canonpath()
Matt Harbison <matt_harbison@yahoo.com>
parents: 34956
diff changeset
191 >>> unixonly(b'/repo', b'/repo/subdir', b'filename', b'subdir/filename')
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parents: 34956
diff changeset
192 'subdir/filename'
705d0f2bb677 pathutil: add doctests for canonpath()
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parents: 34956
diff changeset
193 '''
20033
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parents:
diff changeset
194 if util.endswithsep(root):
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Augie Fackler <raf@durin42.com>
parents:
diff changeset
195 rootsep = root
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Augie Fackler <raf@durin42.com>
parents:
diff changeset
196 else:
30619
cfe66dcf45c0 py3: replace os.sep with pycompat.ossep (part 2 of 4)
Pulkit Goyal <7895pulkit@gmail.com>
parents: 30342
diff changeset
197 rootsep = root + pycompat.ossep
20033
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parents:
diff changeset
198 name = myname
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parents:
diff changeset
199 if not os.path.isabs(name):
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Augie Fackler <raf@durin42.com>
parents:
diff changeset
200 name = os.path.join(root, cwd, name)
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parents:
diff changeset
201 name = os.path.normpath(name)
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Augie Fackler <raf@durin42.com>
parents:
diff changeset
202 if auditor is None:
f962870712da pathutil: tease out a new library to break an import cycle from canonpath use
Augie Fackler <raf@durin42.com>
parents:
diff changeset
203 auditor = pathauditor(root)
f962870712da pathutil: tease out a new library to break an import cycle from canonpath use
Augie Fackler <raf@durin42.com>
parents:
diff changeset
204 if name != rootsep and name.startswith(rootsep):
43076
2372284d9457 formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents: 38593
diff changeset
205 name = name[len(rootsep) :]
20033
f962870712da pathutil: tease out a new library to break an import cycle from canonpath use
Augie Fackler <raf@durin42.com>
parents:
diff changeset
206 auditor(name)
f962870712da pathutil: tease out a new library to break an import cycle from canonpath use
Augie Fackler <raf@durin42.com>
parents:
diff changeset
207 return util.pconvert(name)
f962870712da pathutil: tease out a new library to break an import cycle from canonpath use
Augie Fackler <raf@durin42.com>
parents:
diff changeset
208 elif name == root:
43077
687b865b95ad formatting: byteify all mercurial/ and hgext/ string literals
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parents: 43076
diff changeset
209 return b''
20033
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Augie Fackler <raf@durin42.com>
parents:
diff changeset
210 else:
f962870712da pathutil: tease out a new library to break an import cycle from canonpath use
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parents:
diff changeset
211 # Determine whether `name' is in the hierarchy at or beneath `root',
f962870712da pathutil: tease out a new library to break an import cycle from canonpath use
Augie Fackler <raf@durin42.com>
parents:
diff changeset
212 # by iterating name=dirname(name) until that causes no change (can't
f962870712da pathutil: tease out a new library to break an import cycle from canonpath use
Augie Fackler <raf@durin42.com>
parents:
diff changeset
213 # check name == '/', because that doesn't work on windows). The list
f962870712da pathutil: tease out a new library to break an import cycle from canonpath use
Augie Fackler <raf@durin42.com>
parents:
diff changeset
214 # `rel' holds the reversed list of components making up the relative
f962870712da pathutil: tease out a new library to break an import cycle from canonpath use
Augie Fackler <raf@durin42.com>
parents:
diff changeset
215 # file name we want.
f962870712da pathutil: tease out a new library to break an import cycle from canonpath use
Augie Fackler <raf@durin42.com>
parents:
diff changeset
216 rel = []
f962870712da pathutil: tease out a new library to break an import cycle from canonpath use
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parents:
diff changeset
217 while True:
f962870712da pathutil: tease out a new library to break an import cycle from canonpath use
Augie Fackler <raf@durin42.com>
parents:
diff changeset
218 try:
f962870712da pathutil: tease out a new library to break an import cycle from canonpath use
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parents:
diff changeset
219 s = util.samefile(name, root)
f962870712da pathutil: tease out a new library to break an import cycle from canonpath use
Augie Fackler <raf@durin42.com>
parents:
diff changeset
220 except OSError:
f962870712da pathutil: tease out a new library to break an import cycle from canonpath use
Augie Fackler <raf@durin42.com>
parents:
diff changeset
221 s = False
f962870712da pathutil: tease out a new library to break an import cycle from canonpath use
Augie Fackler <raf@durin42.com>
parents:
diff changeset
222 if s:
f962870712da pathutil: tease out a new library to break an import cycle from canonpath use
Augie Fackler <raf@durin42.com>
parents:
diff changeset
223 if not rel:
f962870712da pathutil: tease out a new library to break an import cycle from canonpath use
Augie Fackler <raf@durin42.com>
parents:
diff changeset
224 # name was actually the same as root (maybe a symlink)
43077
687b865b95ad formatting: byteify all mercurial/ and hgext/ string literals
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parents: 43076
diff changeset
225 return b''
20033
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Augie Fackler <raf@durin42.com>
parents:
diff changeset
226 rel.reverse()
f962870712da pathutil: tease out a new library to break an import cycle from canonpath use
Augie Fackler <raf@durin42.com>
parents:
diff changeset
227 name = os.path.join(*rel)
f962870712da pathutil: tease out a new library to break an import cycle from canonpath use
Augie Fackler <raf@durin42.com>
parents:
diff changeset
228 auditor(name)
f962870712da pathutil: tease out a new library to break an import cycle from canonpath use
Augie Fackler <raf@durin42.com>
parents:
diff changeset
229 return util.pconvert(name)
f962870712da pathutil: tease out a new library to break an import cycle from canonpath use
Augie Fackler <raf@durin42.com>
parents:
diff changeset
230 dirname, basename = util.split(name)
f962870712da pathutil: tease out a new library to break an import cycle from canonpath use
Augie Fackler <raf@durin42.com>
parents:
diff changeset
231 rel.append(basename)
f962870712da pathutil: tease out a new library to break an import cycle from canonpath use
Augie Fackler <raf@durin42.com>
parents:
diff changeset
232 if dirname == name:
f962870712da pathutil: tease out a new library to break an import cycle from canonpath use
Augie Fackler <raf@durin42.com>
parents:
diff changeset
233 break
f962870712da pathutil: tease out a new library to break an import cycle from canonpath use
Augie Fackler <raf@durin42.com>
parents:
diff changeset
234 name = dirname
f962870712da pathutil: tease out a new library to break an import cycle from canonpath use
Augie Fackler <raf@durin42.com>
parents:
diff changeset
235
25011
7d6a507a4c53 pathutil: hint if a path is root relative instead of cwd relative (issue4663)
Matt Harbison <matt_harbison@yahoo.com>
parents: 23602
diff changeset
236 # A common mistake is to use -R, but specify a file relative to the repo
7d6a507a4c53 pathutil: hint if a path is root relative instead of cwd relative (issue4663)
Matt Harbison <matt_harbison@yahoo.com>
parents: 23602
diff changeset
237 # instead of cwd. Detect that case, and provide a hint to the user.
7d6a507a4c53 pathutil: hint if a path is root relative instead of cwd relative (issue4663)
Matt Harbison <matt_harbison@yahoo.com>
parents: 23602
diff changeset
238 hint = None
7d6a507a4c53 pathutil: hint if a path is root relative instead of cwd relative (issue4663)
Matt Harbison <matt_harbison@yahoo.com>
parents: 23602
diff changeset
239 try:
25022
10bbdcd89164 canonpath: fix infinite recursion
Matt Mackall <mpm@selenic.com>
parents: 25011
diff changeset
240 if cwd != root:
10bbdcd89164 canonpath: fix infinite recursion
Matt Mackall <mpm@selenic.com>
parents: 25011
diff changeset
241 canonpath(root, root, myname, auditor)
43077
687b865b95ad formatting: byteify all mercurial/ and hgext/ string literals
Augie Fackler <augie@google.com>
parents: 43076
diff changeset
242 relpath = util.pathto(root, cwd, b'')
38593
21be76e07148 py3: use bytes.endswith() instead of bytes[n]
Yuya Nishihara <yuya@tcha.org>
parents: 36678
diff changeset
243 if relpath.endswith(pycompat.ossep):
34956
f445b10dc7fb pathutil: use util.pathto() to calculate relative cwd in canonpath()
Matt Harbison <matt_harbison@yahoo.com>
parents: 34261
diff changeset
244 relpath = relpath[:-1]
43077
687b865b95ad formatting: byteify all mercurial/ and hgext/ string literals
Augie Fackler <augie@google.com>
parents: 43076
diff changeset
245 hint = _(b"consider using '--cwd %s'") % relpath
26587
56b2bcea2529 error: get Abort from 'error' instead of 'util'
Pierre-Yves David <pierre-yves.david@fb.com>
parents: 25964
diff changeset
246 except error.Abort:
25011
7d6a507a4c53 pathutil: hint if a path is root relative instead of cwd relative (issue4663)
Matt Harbison <matt_harbison@yahoo.com>
parents: 23602
diff changeset
247 pass
7d6a507a4c53 pathutil: hint if a path is root relative instead of cwd relative (issue4663)
Matt Harbison <matt_harbison@yahoo.com>
parents: 23602
diff changeset
248
43076
2372284d9457 formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents: 38593
diff changeset
249 raise error.Abort(
43077
687b865b95ad formatting: byteify all mercurial/ and hgext/ string literals
Augie Fackler <augie@google.com>
parents: 43076
diff changeset
250 _(b"%s not under root '%s'") % (myname, root), hint=hint
43076
2372284d9457 formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents: 38593
diff changeset
251 )
2372284d9457 formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents: 38593
diff changeset
252
21568
8dd17b19e722 subrepo: normalize path in the specific way for problematic encodings
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 20033
diff changeset
253
8dd17b19e722 subrepo: normalize path in the specific way for problematic encodings
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 20033
diff changeset
254 def normasprefix(path):
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255 '''normalize the specified path as path prefix
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256
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257 Returned value can be used safely for "p.startswith(prefix)",
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258 "p[len(prefix):]", and so on.
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259
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260 For efficiency, this expects "path" argument to be already
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261 normalized by "os.path.normpath", "os.path.realpath", and so on.
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262
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263 See also issue3033 for detail about need of this function.
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264
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265 >>> normasprefix(b'/foo/bar').replace(pycompat.ossep, b'/')
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266 '/foo/bar/'
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267 >>> normasprefix(b'/').replace(pycompat.ossep, b'/')
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268 '/'
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269 '''
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270 d, p = os.path.splitdrive(path)
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271 if len(p) != len(pycompat.ossep):
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272 return path + pycompat.ossep
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273 else:
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274 return path
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275
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276
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277 def finddirs(path):
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278 pos = path.rfind(b'/')
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279 while pos != -1:
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280 yield path[:pos]
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281 pos = path.rfind(b'/', 0, pos)
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282 yield b''
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283
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284
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285 class dirs(object):
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286 '''a multiset of directory names from a set of file paths'''
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287
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288 def __init__(self, map, skip=None):
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289 self._dirs = {}
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290 addpath = self.addpath
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291 if isinstance(map, dict) and skip is not None:
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292 for f, s in pycompat.iteritems(map):
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293 if s[0] != skip:
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294 addpath(f)
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295 elif skip is not None:
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296 raise error.ProgrammingError(
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297 b"skip character is only supported with a dict source"
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298 )
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299 else:
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300 for f in map:
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301 addpath(f)
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302
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303 def addpath(self, path):
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304 dirs = self._dirs
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305 for base in finddirs(path):
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306 if base.endswith(b'/'):
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307 raise ValueError(
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308 "found invalid consecutive slashes in path: %r" % base
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309 )
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310 if base in dirs:
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311 dirs[base] += 1
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312 return
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313 dirs[base] = 1
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314
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315 def delpath(self, path):
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316 dirs = self._dirs
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317 for base in finddirs(path):
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318 if dirs[base] > 1:
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319 dirs[base] -= 1
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320 return
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321 del dirs[base]
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322
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323 def __iter__(self):
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324 return iter(self._dirs)
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325
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326 def __contains__(self, d):
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327 return d in self._dirs
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328
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329
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330 if util.safehasattr(parsers, 'dirs'):
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331 dirs = parsers.dirs
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332
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333 if rustdirs is not None:
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334 dirs = rustdirs
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335
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336
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337 # forward two methods from posixpath that do what we need, but we'd
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338 # rather not let our internals know that we're thinking in posix terms
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339 # - instead we'll let them be oblivious.
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340 join = posixpath.join
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341 dirname = posixpath.dirname