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comparison contrib/purge/purge.py @ 4307:c8919eb0f315

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purge: abort with missing files avoiding problems with name-mangling fs In a name mangling filesystem (e.g. a case insensitive one) dirstate.walk() can yield filenames different from the ones stored in the dirstate. This already confuses the status and add commands, but with purge this may cause data loss. To prevent this purge refuses to work if there are missing files and has a 'force' option if the user knows it is safe. Even with the force option purge checks if any of the missing files is still available in the working dir: if so there may be some problem with the underlying filesystem, so it unconditionally aborts.
author Emanuele Aina <em@nerd.ocracy.org>
date Wed, 28 Mar 2007 21:34:12 +0200
parents 4c714ed245d6
children
comparison
equal deleted inserted replaced
4306:d4f0405fadac 4307:c8919eb0f315
29 29
30 from mercurial import hg, util 30 from mercurial import hg, util
31 from mercurial.i18n import _ 31 from mercurial.i18n import _
32 import os 32 import os
33 33
34 def dopurge(ui, repo, dirs=None, act=True, abort_on_err=False, eol='\n'): 34 def dopurge(ui, repo, dirs=None, act=True, abort_on_err=False, eol='\n',
35 force=False):
35 def error(msg): 36 def error(msg):
36 if abort_on_err: 37 if abort_on_err:
37 raise util.Abort(msg) 38 raise util.Abort(msg)
38 else: 39 else:
39 ui.warn(_('warning: %s\n') % msg) 40 ui.warn(_('warning: %s\n') % msg)
47 else: 48 else:
48 ui.write('%s%s' % (name, eol)) 49 ui.write('%s%s' % (name, eol))
49 50
50 directories = [] 51 directories = []
51 files = [] 52 files = []
53 missing = []
52 roots, match, anypats = util.cmdmatcher(repo.root, repo.getcwd(), dirs) 54 roots, match, anypats = util.cmdmatcher(repo.root, repo.getcwd(), dirs)
53 for src, f, st in repo.dirstate.statwalk(files=roots, match=match, 55 for src, f, st in repo.dirstate.statwalk(files=roots, match=match,
54 ignored=True, directories=True): 56 ignored=True, directories=True):
55 if src == 'd': 57 if src == 'd':
56 directories.append(f) 58 directories.append(f)
59 elif src == 'm':
60 missing.append(f)
57 elif src == 'f' and f not in repo.dirstate: 61 elif src == 'f' and f not in repo.dirstate:
58 files.append(f) 62 files.append(f)
63
64 _check_missing(ui, repo, missing, force)
59 65
60 directories.sort() 66 directories.sort()
61 67
62 for f in files: 68 for f in files:
63 if f not in repo.dirstate: 69 if f not in repo.dirstate:
66 72
67 for f in directories[::-1]: 73 for f in directories[::-1]:
68 if not os.listdir(repo.wjoin(f)): 74 if not os.listdir(repo.wjoin(f)):
69 ui.note(_('Removing directory %s\n') % f) 75 ui.note(_('Removing directory %s\n') % f)
70 remove(os.rmdir, f) 76 remove(os.rmdir, f)
77
78 def _check_missing(ui, repo, missing, force=False):
79 """Abort if there is the chance of having problems with name-mangling fs
80
81 In a name mangling filesystem (e.g. a case insensitive one)
82 dirstate.walk() can yield filenames different from the ones
83 stored in the dirstate. This already confuses the status and
84 add commands, but with purge this may cause data loss.
85
86 To prevent this, _check_missing will abort if there are missing
87 files. The force option will let the user skip the check if he
88 knows it is safe.
89
90 Even with the force option this function will check if any of the
91 missing files is still available in the working dir: if so there
92 may be some problem with the underlying filesystem, so it
93 aborts unconditionally."""
94
95 found = [f for f in missing if util.lexists(repo.wjoin(f))]
96
97 if found:
98 if not ui.quiet:
99 ui.warn(_("The following tracked files weren't listed by the "
100 "filesystem, but could still be found:\n"))
101 for f in found:
102 ui.warn("%s\n" % f)
103 if util.checkfolding(repo.path):
104 ui.warn(_("This is probably due to a case-insensitive "
105 "filesystem\n"))
106 raise util.Abort(_("purging on name mangling filesystems is not "
107 "yet fully supported"))
108
109 if missing and not force:
110 raise util.Abort(_("there are missing files in the working dir and "
111 "purge still has problems with them due to name "
112 "mangling filesystems. "
113 "Use --force if you know what you are doing"))
71 114
72 115
73 def purge(ui, repo, *dirs, **opts): 116 def purge(ui, repo, *dirs, **opts):
74 '''removes files not tracked by mercurial 117 '''removes files not tracked by mercurial
75 118
98 abort_on_err = bool(opts['abort_on_err']) 141 abort_on_err = bool(opts['abort_on_err'])
99 eol = opts['print0'] and '\0' or '\n' 142 eol = opts['print0'] and '\0' or '\n'
100 if eol == '\0': 143 if eol == '\0':
101 # --print0 implies --print 144 # --print0 implies --print
102 act = False 145 act = False
103 dopurge(ui, repo, dirs, act, abort_on_err, eol) 146 force = bool(opts['force'])
147 dopurge(ui, repo, dirs, act, abort_on_err, eol, force)
104 148
105 149
106 cmdtable = { 150 cmdtable = {
107 'purge': 151 'purge':
108 (purge, 152 (purge,
109 [('a', 'abort-on-err', None, _('abort if an error occurs')), 153 [('a', 'abort-on-err', None, _('abort if an error occurs')),
154 ('f', 'force', None, _('purge even when missing files are detected')),
110 ('p', 'print', None, _('print the file names instead of deleting them')), 155 ('p', 'print', None, _('print the file names instead of deleting them')),
111 ('0', 'print0', None, _('end filenames with NUL, for use with xargs' 156 ('0', 'print0', None, _('end filenames with NUL, for use with xargs'
112 ' (implies -p)'))], 157 ' (implies -p)'))],
113 _('hg purge [OPTION]... [DIR]...')) 158 _('hg purge [OPTION]... [DIR]...'))
114 } 159 }