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annotate hgext/purge.py @ 4311:1043e4b27ab9

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Move back the purge extension in hgext
author Emanuele Aina <em@nerd.ocracy.org>
date Tue, 27 Feb 2007 09:05:36 +0100
parents contrib/purge/purge.py@c8919eb0f315
children a73cf208b2a0
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1 # Copyright (C) 2006 - Marco Barisione <marco@barisione.org>
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2 #
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3 # This is a small extension for Mercurial (http://www.selenic.com/mercurial)
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4 # that removes files not known to mercurial
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5 #
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6 # This program was inspired by the "cvspurge" script contained in CVS utilities
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7 # (http://www.red-bean.com/cvsutils/).
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8 #
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9 # To enable the "purge" extension put these lines in your ~/.hgrc:
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10 # [extensions]
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11 # hgext.purge =
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12 #
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13 # For help on the usage of "hg purge" use:
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14 # hg help purge
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15 #
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16 # This program is free software; you can redistribute it and/or modify
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17 # it under the terms of the GNU General Public License as published by
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18 # the Free Software Foundation; either version 2 of the License, or
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19 # (at your option) any later version.
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20 #
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21 # This program is distributed in the hope that it will be useful,
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22 # but WITHOUT ANY WARRANTY; without even the implied warranty of
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23 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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24 # GNU General Public License for more details.
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25 #
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26 # You should have received a copy of the GNU General Public License
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27 # along with this program; if not, write to the Free Software
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28 # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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29
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30 from mercurial import hg, util
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31 from mercurial.i18n import _
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32 import os
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33
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34 def dopurge(ui, repo, dirs=None, act=True, abort_on_err=False, eol='\n',
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35 force=False):
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36 def error(msg):
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37 if abort_on_err:
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38 raise util.Abort(msg)
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39 else:
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40 ui.warn(_('warning: %s\n') % msg)
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41
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42 def remove(remove_func, name):
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43 if act:
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44 try:
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45 remove_func(os.path.join(repo.root, name))
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46 except OSError, e:
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47 error(_('%s cannot be removed') % name)
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48 else:
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49 ui.write('%s%s' % (name, eol))
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50
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51 directories = []
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52 files = []
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53 missing = []
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54 roots, match, anypats = util.cmdmatcher(repo.root, repo.getcwd(), dirs)
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55 for src, f, st in repo.dirstate.statwalk(files=roots, match=match,
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56 ignored=True, directories=True):
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57 if src == 'd':
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58 directories.append(f)
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59 elif src == 'm':
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60 missing.append(f)
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61 elif src == 'f' and f not in repo.dirstate:
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62 files.append(f)
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63
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64 _check_missing(ui, repo, missing, force)
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65
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66 directories.sort()
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67
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68 for f in files:
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69 if f not in repo.dirstate:
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70 ui.note(_('Removing file %s\n') % f)
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71 remove(os.remove, f)
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72
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73 for f in directories[::-1]:
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74 if not os.listdir(repo.wjoin(f)):
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75 ui.note(_('Removing directory %s\n') % f)
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76 remove(os.rmdir, f)
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77
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78 def _check_missing(ui, repo, missing, force=False):
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79 """Abort if there is the chance of having problems with name-mangling fs
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80
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81 In a name mangling filesystem (e.g. a case insensitive one)
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82 dirstate.walk() can yield filenames different from the ones
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83 stored in the dirstate. This already confuses the status and
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84 add commands, but with purge this may cause data loss.
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85
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86 To prevent this, _check_missing will abort if there are missing
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87 files. The force option will let the user skip the check if he
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88 knows it is safe.
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89
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90 Even with the force option this function will check if any of the
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91 missing files is still available in the working dir: if so there
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92 may be some problem with the underlying filesystem, so it
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93 aborts unconditionally."""
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94
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95 found = [f for f in missing if util.lexists(repo.wjoin(f))]
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96
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97 if found:
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98 if not ui.quiet:
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99 ui.warn(_("The following tracked files weren't listed by the "
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100 "filesystem, but could still be found:\n"))
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101 for f in found:
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102 ui.warn("%s\n" % f)
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103 if util.checkfolding(repo.path):
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104 ui.warn(_("This is probably due to a case-insensitive "
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105 "filesystem\n"))
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106 raise util.Abort(_("purging on name mangling filesystems is not "
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107 "yet fully supported"))
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108
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109 if missing and not force:
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110 raise util.Abort(_("there are missing files in the working dir and "
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111 "purge still has problems with them due to name "
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112 "mangling filesystems. "
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113 "Use --force if you know what you are doing"))
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114
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115
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116 def purge(ui, repo, *dirs, **opts):
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117 '''removes files not tracked by mercurial
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118
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119 Delete files not known to mercurial, this is useful to test local and
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120 uncommitted changes in the otherwise clean source tree.
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121
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122 This means that purge will delete:
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123 - Unknown files: files marked with "?" by "hg status"
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124 - Ignored files: files usually ignored by Mercurial because they match
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125 a pattern in a ".hgignore" file
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126 - Empty directories: in fact Mercurial ignores directories unless they
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127 contain files under source control managment
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128 But it will leave untouched:
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129 - Unmodified tracked files
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130 - Modified tracked files
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131 - New files added to the repository (with "hg add")
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132
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133 If directories are given on the command line, only files in these
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134 directories are considered.
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135
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136 Be careful with purge, you could irreversibly delete some files you
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137 forgot to add to the repository. If you only want to print the list of
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138 files that this program would delete use the --print option.
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139 '''
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140 act = not opts['print']
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141 abort_on_err = bool(opts['abort_on_err'])
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142 eol = opts['print0'] and '\0' or '\n'
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143 if eol == '\0':
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144 # --print0 implies --print
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145 act = False
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146 force = bool(opts['force'])
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147 dopurge(ui, repo, dirs, act, abort_on_err, eol, force)
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148
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149
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150 cmdtable = {
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151 'purge':
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152 (purge,
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153 [('a', 'abort-on-err', None, _('abort if an error occurs')),
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154 ('f', 'force', None, _('purge even when missing files are detected')),
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155 ('p', 'print', None, _('print the file names instead of deleting them')),
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156 ('0', 'print0', None, _('end filenames with NUL, for use with xargs'
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157 ' (implies -p)'))],
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158 _('hg purge [OPTION]... [DIR]...'))
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159 }