Mercurial > hg
annotate mercurial/scmutil.py @ 14252:19067884c5f5
revlog: calculate base revisions iteratively
This is in preparation for generaldelta, where the revlog entry base field is
reinterpreted as the deltaparent. For that reason we also rename the base
function to chainbase.
Without generaldelta, performance is unaffected, but generaldelta will suffer
from this in _addrevision, since delta chains will be walked repeatedly.
A cache has been added to eliminate this problem completely.
author | Sune Foldager <cryo@cyanite.org> |
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date | Sat, 07 May 2011 22:40:14 +0200 |
parents | e949a008999d |
children | e3649bcca3f6 |
rev | line source |
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1 # scmutil.py - Mercurial core utility functions |
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2 # |
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3 # Copyright Matt Mackall <mpm@selenic.com> |
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4 # |
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5 # This software may be used and distributed according to the terms of the |
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6 # GNU General Public License version 2 or any later version. |
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7 |
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8 from i18n import _ |
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9 import util, error, osutil |
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10 import os, errno, stat, sys |
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11 |
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12 def checkfilename(f): |
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13 '''Check that the filename f is an acceptable filename for a tracked file''' |
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14 if '\r' in f or '\n' in f: |
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15 raise util.Abort(_("'\\n' and '\\r' disallowed in filenames: %r") % f) |
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16 |
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17 def checkportable(ui, f): |
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18 '''Check if filename f is portable and warn or abort depending on config''' |
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19 checkfilename(f) |
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20 abort, warn = checkportabilityalert(ui) |
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21 if abort or warn: |
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22 msg = util.checkwinfilename(f) |
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23 if msg: |
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24 msg = "%s: %r" % (msg, f) |
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25 if abort: |
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26 raise util.Abort(msg) |
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27 ui.warn(_("warning: %s\n") % msg) |
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28 |
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29 def checkportabilityalert(ui): |
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30 '''check if the user's config requests nothing, a warning, or abort for |
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31 non-portable filenames''' |
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32 val = ui.config('ui', 'portablefilenames', 'warn') |
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33 lval = val.lower() |
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34 bval = util.parsebool(val) |
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35 abort = os.name == 'nt' or lval == 'abort' |
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36 warn = bval or lval == 'warn' |
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37 if bval is None and not (warn or abort or lval == 'ignore'): |
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38 raise error.ConfigError( |
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39 _("ui.portablefilenames value is invalid ('%s')") % val) |
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40 return abort, warn |
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41 |
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42 class casecollisionauditor(object): |
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43 def __init__(self, ui, abort, existingiter): |
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44 self._ui = ui |
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45 self._abort = abort |
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46 self._map = {} |
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47 for f in existingiter: |
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48 self._map[f.lower()] = f |
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49 |
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50 def __call__(self, f): |
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51 fl = f.lower() |
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52 map = self._map |
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53 if fl in map and map[fl] != f: |
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54 msg = _('possible case-folding collision for %s') % f |
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55 if self._abort: |
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56 raise util.Abort(msg) |
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57 self._ui.warn(_("warning: %s\n") % msg) |
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58 map[fl] = f |
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59 |
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60 class pathauditor(object): |
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61 '''ensure that a filesystem path contains no banned components. |
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62 the following properties of a path are checked: |
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63 |
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64 - ends with a directory separator |
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65 - under top-level .hg |
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66 - starts at the root of a windows drive |
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67 - contains ".." |
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68 - traverses a symlink (e.g. a/symlink_here/b) |
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69 - inside a nested repository (a callback can be used to approve |
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70 some nested repositories, e.g., subrepositories) |
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71 ''' |
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72 |
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73 def __init__(self, root, callback=None): |
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74 self.audited = set() |
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75 self.auditeddir = set() |
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76 self.root = root |
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77 self.callback = callback |
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78 |
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79 def __call__(self, path): |
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80 '''Check the relative path. |
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81 path may contain a pattern (e.g. foodir/**.txt)''' |
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82 |
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83 if path in self.audited: |
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84 return |
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85 # AIX ignores "/" at end of path, others raise EISDIR. |
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86 if util.endswithsep(path): |
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87 raise util.Abort(_("path ends in directory separator: %s") % path) |
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88 normpath = os.path.normcase(path) |
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89 parts = util.splitpath(normpath) |
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90 if (os.path.splitdrive(path)[0] |
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91 or parts[0].lower() in ('.hg', '.hg.', '') |
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92 or os.pardir in parts): |
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93 raise util.Abort(_("path contains illegal component: %s") % path) |
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94 if '.hg' in path.lower(): |
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95 lparts = [p.lower() for p in parts] |
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96 for p in '.hg', '.hg.': |
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97 if p in lparts[1:]: |
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98 pos = lparts.index(p) |
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99 base = os.path.join(*parts[:pos]) |
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100 raise util.Abort(_('path %r is inside nested repo %r') |
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101 % (path, base)) |
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102 |
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103 parts.pop() |
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104 prefixes = [] |
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105 while parts: |
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106 prefix = os.sep.join(parts) |
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107 if prefix in self.auditeddir: |
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108 break |
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109 curpath = os.path.join(self.root, prefix) |
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110 try: |
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111 st = os.lstat(curpath) |
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112 except OSError, err: |
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113 # EINVAL can be raised as invalid path syntax under win32. |
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114 # They must be ignored for patterns can be checked too. |
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115 if err.errno not in (errno.ENOENT, errno.ENOTDIR, errno.EINVAL): |
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116 raise |
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117 else: |
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118 if stat.S_ISLNK(st.st_mode): |
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119 raise util.Abort( |
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120 _('path %r traverses symbolic link %r') |
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121 % (path, prefix)) |
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122 elif (stat.S_ISDIR(st.st_mode) and |
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123 os.path.isdir(os.path.join(curpath, '.hg'))): |
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124 if not self.callback or not self.callback(curpath): |
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125 raise util.Abort(_('path %r is inside nested repo %r') % |
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126 (path, prefix)) |
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127 prefixes.append(prefix) |
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128 parts.pop() |
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129 |
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130 self.audited.add(path) |
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131 # only add prefixes to the cache after checking everything: we don't |
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132 # want to add "foo/bar/baz" before checking if there's a "foo/.hg" |
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133 self.auditeddir.update(prefixes) |
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134 |
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135 class abstractopener(object): |
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136 """Abstract base class; cannot be instantiated""" |
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137 |
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138 def __init__(self, *args, **kwargs): |
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139 '''Prevent instantiation; don't call this from subclasses.''' |
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140 raise NotImplementedError('attempted instantiating ' + str(type(self))) |
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141 |
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142 def read(self, path): |
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143 fp = self(path, 'rb') |
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144 try: |
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145 return fp.read() |
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146 finally: |
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147 fp.close() |
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148 |
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149 def write(self, path, data): |
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150 fp = self(path, 'wb') |
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151 try: |
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152 return fp.write(data) |
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153 finally: |
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154 fp.close() |
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155 |
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156 def append(self, path, data): |
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157 fp = self(path, 'ab') |
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158 try: |
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159 return fp.write(data) |
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160 finally: |
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161 fp.close() |
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162 |
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163 class opener(abstractopener): |
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164 '''Open files relative to a base directory |
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165 |
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166 This class is used to hide the details of COW semantics and |
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167 remote file access from higher level code. |
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168 ''' |
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169 def __init__(self, base, audit=True): |
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170 self.base = base |
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171 if audit: |
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172 self.auditor = pathauditor(base) |
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173 else: |
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174 self.auditor = util.always |
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175 self.createmode = None |
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176 self._trustnlink = None |
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177 |
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178 @util.propertycache |
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179 def _can_symlink(self): |
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180 return util.checklink(self.base) |
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181 |
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182 def _fixfilemode(self, name): |
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183 if self.createmode is None: |
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184 return |
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185 os.chmod(name, self.createmode & 0666) |
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186 |
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187 def __call__(self, path, mode="r", text=False, atomictemp=False): |
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188 r = util.checkosfilename(path) |
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189 if r: |
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190 raise util.Abort("%s: %r" % (r, path)) |
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191 self.auditor(path) |
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192 f = os.path.join(self.base, path) |
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193 |
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194 if not text and "b" not in mode: |
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195 mode += "b" # for that other OS |
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196 |
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197 nlink = -1 |
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198 dirname, basename = os.path.split(f) |
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199 # If basename is empty, then the path is malformed because it points |
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200 # to a directory. Let the posixfile() call below raise IOError. |
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201 if basename and mode not in ('r', 'rb'): |
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202 if atomictemp: |
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203 if not os.path.isdir(dirname): |
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204 util.makedirs(dirname, self.createmode) |
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205 return util.atomictempfile(f, mode, self.createmode) |
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206 try: |
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207 if 'w' in mode: |
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208 util.unlink(f) |
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209 nlink = 0 |
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210 else: |
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211 # nlinks() may behave differently for files on Windows |
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212 # shares if the file is open. |
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213 fd = util.posixfile(f) |
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214 nlink = util.nlinks(f) |
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215 if nlink < 1: |
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216 nlink = 2 # force mktempcopy (issue1922) |
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217 fd.close() |
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218 except (OSError, IOError), e: |
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219 if e.errno != errno.ENOENT: |
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220 raise |
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221 nlink = 0 |
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222 if not os.path.isdir(dirname): |
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223 util.makedirs(dirname, self.createmode) |
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224 if nlink > 0: |
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225 if self._trustnlink is None: |
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226 self._trustnlink = nlink > 1 or util.checknlink(f) |
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227 if nlink > 1 or not self._trustnlink: |
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228 util.rename(util.mktempcopy(f), f) |
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229 fp = util.posixfile(f, mode) |
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230 if nlink == 0: |
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231 self._fixfilemode(f) |
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232 return fp |
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233 |
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234 def symlink(self, src, dst): |
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235 self.auditor(dst) |
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236 linkname = os.path.join(self.base, dst) |
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237 try: |
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238 os.unlink(linkname) |
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239 except OSError: |
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240 pass |
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241 |
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242 dirname = os.path.dirname(linkname) |
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243 if not os.path.exists(dirname): |
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244 util.makedirs(dirname, self.createmode) |
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245 |
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246 if self._can_symlink: |
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247 try: |
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248 os.symlink(src, linkname) |
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249 except OSError, err: |
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250 raise OSError(err.errno, _('could not symlink to %r: %s') % |
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251 (src, err.strerror), linkname) |
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252 else: |
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253 f = self(dst, "w") |
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254 f.write(src) |
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255 f.close() |
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256 self._fixfilemode(dst) |
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257 |
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258 class filteropener(abstractopener): |
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259 '''Wrapper opener for filtering filenames with a function.''' |
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260 |
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261 def __init__(self, opener, filter): |
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262 self._filter = filter |
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263 self._orig = opener |
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264 |
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265 def __call__(self, path, *args, **kwargs): |
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266 return self._orig(self._filter(path), *args, **kwargs) |
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267 |
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268 def canonpath(root, cwd, myname, auditor=None): |
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269 '''return the canonical path of myname, given cwd and root''' |
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270 if util.endswithsep(root): |
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271 rootsep = root |
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272 else: |
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273 rootsep = root + os.sep |
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274 name = myname |
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275 if not os.path.isabs(name): |
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276 name = os.path.join(root, cwd, name) |
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277 name = os.path.normpath(name) |
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278 if auditor is None: |
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279 auditor = pathauditor(root) |
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280 if name != rootsep and name.startswith(rootsep): |
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281 name = name[len(rootsep):] |
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282 auditor(name) |
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283 return util.pconvert(name) |
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284 elif name == root: |
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285 return '' |
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286 else: |
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287 # Determine whether `name' is in the hierarchy at or beneath `root', |
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288 # by iterating name=dirname(name) until that causes no change (can't |
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289 # check name == '/', because that doesn't work on windows). For each |
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290 # `name', compare dev/inode numbers. If they match, the list `rel' |
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291 # holds the reversed list of components making up the relative file |
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292 # name we want. |
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293 root_st = os.stat(root) |
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294 rel = [] |
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295 while True: |
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296 try: |
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297 name_st = os.stat(name) |
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298 except OSError: |
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299 break |
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300 if util.samestat(name_st, root_st): |
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301 if not rel: |
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302 # name was actually the same as root (maybe a symlink) |
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303 return '' |
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304 rel.reverse() |
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305 name = os.path.join(*rel) |
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306 auditor(name) |
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307 return util.pconvert(name) |
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308 dirname, basename = os.path.split(name) |
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309 rel.append(basename) |
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310 if dirname == name: |
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311 break |
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312 name = dirname |
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313 |
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314 raise util.Abort('%s not under root' % myname) |
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315 |
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316 def walkrepos(path, followsym=False, seen_dirs=None, recurse=False): |
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317 '''yield every hg repository under path, recursively.''' |
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318 def errhandler(err): |
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319 if err.filename == path: |
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320 raise err |
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321 if followsym and hasattr(os.path, 'samestat'): |
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322 def adddir(dirlst, dirname): |
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323 match = False |
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324 samestat = os.path.samestat |
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325 dirstat = os.stat(dirname) |
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326 for lstdirstat in dirlst: |
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327 if samestat(dirstat, lstdirstat): |
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328 match = True |
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329 break |
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330 if not match: |
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331 dirlst.append(dirstat) |
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332 return not match |
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333 else: |
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334 followsym = False |
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335 |
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336 if (seen_dirs is None) and followsym: |
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337 seen_dirs = [] |
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338 adddir(seen_dirs, path) |
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339 for root, dirs, files in os.walk(path, topdown=True, onerror=errhandler): |
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340 dirs.sort() |
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341 if '.hg' in dirs: |
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342 yield root # found a repository |
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343 qroot = os.path.join(root, '.hg', 'patches') |
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344 if os.path.isdir(os.path.join(qroot, '.hg')): |
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345 yield qroot # we have a patch queue repo here |
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346 if recurse: |
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347 # avoid recursing inside the .hg directory |
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348 dirs.remove('.hg') |
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349 else: |
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350 dirs[:] = [] # don't descend further |
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351 elif followsym: |
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352 newdirs = [] |
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353 for d in dirs: |
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354 fname = os.path.join(root, d) |
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355 if adddir(seen_dirs, fname): |
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356 if os.path.islink(fname): |
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357 for hgname in walkrepos(fname, True, seen_dirs): |
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358 yield hgname |
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359 else: |
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360 newdirs.append(d) |
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361 dirs[:] = newdirs |
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362 |
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363 def osrcpath(): |
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364 '''return default os-specific hgrc search path''' |
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365 path = systemrcpath() |
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366 path.extend(userrcpath()) |
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367 path = [os.path.normpath(f) for f in path] |
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368 return path |
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369 |
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370 _rcpath = None |
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371 |
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372 def rcpath(): |
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373 '''return hgrc search path. if env var HGRCPATH is set, use it. |
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374 for each item in path, if directory, use files ending in .rc, |
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375 else use item. |
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376 make HGRCPATH empty to only look in .hg/hgrc of current repo. |
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377 if no HGRCPATH, use default os-specific path.''' |
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378 global _rcpath |
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379 if _rcpath is None: |
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380 if 'HGRCPATH' in os.environ: |
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381 _rcpath = [] |
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382 for p in os.environ['HGRCPATH'].split(os.pathsep): |
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383 if not p: |
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384 continue |
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385 p = util.expandpath(p) |
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386 if os.path.isdir(p): |
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387 for f, kind in osutil.listdir(p): |
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388 if f.endswith('.rc'): |
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389 _rcpath.append(os.path.join(p, f)) |
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390 else: |
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391 _rcpath.append(p) |
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392 else: |
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393 _rcpath = osrcpath() |
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394 return _rcpath |
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395 |
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396 if os.name != 'nt': |
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397 |
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398 def rcfiles(path): |
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399 rcs = [os.path.join(path, 'hgrc')] |
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400 rcdir = os.path.join(path, 'hgrc.d') |
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401 try: |
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402 rcs.extend([os.path.join(rcdir, f) |
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403 for f, kind in osutil.listdir(rcdir) |
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404 if f.endswith(".rc")]) |
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405 except OSError: |
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406 pass |
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407 return rcs |
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408 |
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409 def systemrcpath(): |
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410 path = [] |
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411 # old mod_python does not set sys.argv |
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412 if len(getattr(sys, 'argv', [])) > 0: |
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413 path.extend(rcfiles(os.path.dirname(sys.argv[0]) + |
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414 '/../etc/mercurial')) |
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415 path.extend(rcfiles('/etc/mercurial')) |
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416 return path |
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417 |
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418 def userrcpath(): |
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419 return [os.path.expanduser('~/.hgrc')] |
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420 |
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421 else: |
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422 |
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423 _HKEY_LOCAL_MACHINE = 0x80000002L |
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424 |
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425 def systemrcpath(): |
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426 '''return default os-specific hgrc search path''' |
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427 rcpath = [] |
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428 filename = util.executablepath() |
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429 # Use mercurial.ini found in directory with hg.exe |
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430 progrc = os.path.join(os.path.dirname(filename), 'mercurial.ini') |
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431 if os.path.isfile(progrc): |
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432 rcpath.append(progrc) |
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433 return rcpath |
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434 # Use hgrc.d found in directory with hg.exe |
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435 progrcd = os.path.join(os.path.dirname(filename), 'hgrc.d') |
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436 if os.path.isdir(progrcd): |
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437 for f, kind in osutil.listdir(progrcd): |
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438 if f.endswith('.rc'): |
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439 rcpath.append(os.path.join(progrcd, f)) |
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440 return rcpath |
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441 # else look for a system rcpath in the registry |
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442 value = util.lookupreg('SOFTWARE\\Mercurial', None, |
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443 _HKEY_LOCAL_MACHINE) |
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444 if not isinstance(value, str) or not value: |
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445 return rcpath |
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446 value = value.replace('/', os.sep) |
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447 for p in value.split(os.pathsep): |
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448 if p.lower().endswith('mercurial.ini'): |
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449 rcpath.append(p) |
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450 elif os.path.isdir(p): |
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451 for f, kind in osutil.listdir(p): |
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452 if f.endswith('.rc'): |
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453 rcpath.append(os.path.join(p, f)) |
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454 return rcpath |
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455 |
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456 def userrcpath(): |
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changeset
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457 '''return os-specific hgrc search path to the user dir''' |
9c374cf76b7d
move system_rcpath and user_rcpath to scmutil
Adrian Buehlmann <adrian@cadifra.com>
parents:
13985
diff
changeset
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458 home = os.path.expanduser('~') |
9c374cf76b7d
move system_rcpath and user_rcpath to scmutil
Adrian Buehlmann <adrian@cadifra.com>
parents:
13985
diff
changeset
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459 path = [os.path.join(home, 'mercurial.ini'), |
9c374cf76b7d
move system_rcpath and user_rcpath to scmutil
Adrian Buehlmann <adrian@cadifra.com>
parents:
13985
diff
changeset
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460 os.path.join(home, '.hgrc')] |
9c374cf76b7d
move system_rcpath and user_rcpath to scmutil
Adrian Buehlmann <adrian@cadifra.com>
parents:
13985
diff
changeset
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461 userprofile = os.environ.get('USERPROFILE') |
9c374cf76b7d
move system_rcpath and user_rcpath to scmutil
Adrian Buehlmann <adrian@cadifra.com>
parents:
13985
diff
changeset
|
462 if userprofile: |
9c374cf76b7d
move system_rcpath and user_rcpath to scmutil
Adrian Buehlmann <adrian@cadifra.com>
parents:
13985
diff
changeset
|
463 path.append(os.path.join(userprofile, 'mercurial.ini')) |
9c374cf76b7d
move system_rcpath and user_rcpath to scmutil
Adrian Buehlmann <adrian@cadifra.com>
parents:
13985
diff
changeset
|
464 path.append(os.path.join(userprofile, '.hgrc')) |
9c374cf76b7d
move system_rcpath and user_rcpath to scmutil
Adrian Buehlmann <adrian@cadifra.com>
parents:
13985
diff
changeset
|
465 return path |