hgext/purge.py
author Daniel Holth <dholth@fastmail.fm>
Wed, 16 May 2007 01:10:12 -0400
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use documented convert-repo interface
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# Copyright (C) 2006 - Marco Barisione <marco@barisione.org>
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#
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# This is a small extension for Mercurial (http://www.selenic.com/mercurial)
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# that removes files not known to mercurial
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#
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# This program was inspired by the "cvspurge" script contained in CVS utilities
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# (http://www.red-bean.com/cvsutils/).
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#
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# To enable the "purge" extension put these lines in your ~/.hgrc:
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#  [extensions]
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#  hgext.purge =
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#
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# For help on the usage of "hg purge" use:
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#  hg help purge
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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from mercurial import hg, util
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from mercurial.i18n import _
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import os
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def dopurge(ui, repo, dirs=None, act=True, abort_on_err=False, eol='\n',
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            force=False):
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    def error(msg):
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        if abort_on_err:
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            raise util.Abort(msg)
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        else:
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            ui.warn(_('warning: %s\n') % msg)
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    def remove(remove_func, name):
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        if act:
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            try:
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                remove_func(os.path.join(repo.root, name))
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            except OSError, e:
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                error(_('%s cannot be removed') % name)
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        else:
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            ui.write('%s%s' % (name, eol))
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    directories = []
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    files = []
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    missing = []
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    roots, match, anypats = util.cmdmatcher(repo.root, repo.getcwd(), dirs)
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    for src, f, st in repo.dirstate.statwalk(files=roots, match=match,
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                                             ignored=True, directories=True):
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        if src == 'd':
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            directories.append(f)
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        elif src == 'm':
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            missing.append(f)
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        elif src == 'f' and f not in repo.dirstate:
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            files.append(f)
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    _check_missing(ui, repo, missing, force)
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    directories.sort()
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    for f in files:
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        if f not in repo.dirstate:
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            ui.note(_('Removing file %s\n') % f)
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            remove(os.remove, f)
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    for f in directories[::-1]:
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        if not os.listdir(repo.wjoin(f)):
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            ui.note(_('Removing directory %s\n') % f)
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            remove(os.rmdir, f)
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def _check_missing(ui, repo, missing, force=False):
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    """Abort if there is the chance of having problems with name-mangling fs
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    In a name mangling filesystem (e.g. a case insensitive one)
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    dirstate.walk() can yield filenames different from the ones
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    stored in the dirstate. This already confuses the status and
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    add commands, but with purge this may cause data loss.
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    To prevent this, _check_missing will abort if there are missing
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    files. The force option will let the user skip the check if he 
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    knows it is safe.
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    Even with the force option this function will check if any of the 
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    missing files is still available in the working dir: if so there
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    may be some problem with the underlying filesystem, so it
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    aborts unconditionally."""
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    found = [f for f in missing if util.lexists(repo.wjoin(f))]
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    if found:
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        if not ui.quiet:
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            ui.warn(_("The following tracked files weren't listed by the "
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                      "filesystem, but could still be found:\n"))
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            for f in found:
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                ui.warn("%s\n" % f)
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            if util.checkfolding(repo.path):
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                ui.warn(_("This is probably due to a case-insensitive "
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                          "filesystem\n"))
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        raise util.Abort(_("purging on name mangling filesystems is not "
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                           "yet fully supported"))
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    if missing and not force:
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        raise util.Abort(_("there are missing files in the working dir and "
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                           "purge still has problems with them due to name "
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                           "mangling filesystems. "
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                           "Use --force if you know what you are doing"))
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def purge(ui, repo, *dirs, **opts):
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    '''removes files not tracked by mercurial
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    Delete files not known to mercurial, this is useful to test local and
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    uncommitted changes in the otherwise clean source tree.
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    This means that purge will delete:
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     - Unknown files: files marked with "?" by "hg status"
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     - Ignored files: files usually ignored by Mercurial because they match
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       a pattern in a ".hgignore" file
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     - Empty directories: in fact Mercurial ignores directories unless they
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       contain files under source control managment
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    But it will leave untouched:
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     - Unmodified tracked files
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     - Modified tracked files
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     - New files added to the repository (with "hg add")
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    If directories are given on the command line, only files in these
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    directories are considered.
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    Be careful with purge, you could irreversibly delete some files you
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    forgot to add to the repository. If you only want to print the list of
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    files that this program would delete use the --print option.
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    '''
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    act = not opts['print']
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    abort_on_err = bool(opts['abort_on_err'])
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    eol = opts['print0'] and '\0' or '\n'
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    if eol == '\0':
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        # --print0 implies --print
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        act = False
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    force = bool(opts['force'])
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    dopurge(ui, repo, dirs, act, abort_on_err, eol, force)
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cmdtable = {
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    'purge':
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        (purge,
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         [('a', 'abort-on-err', None, _('abort if an error occurs')),
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          ('f', 'force', None, _('purge even when missing files are detected')),
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          ('p', 'print', None, _('print the file names instead of deleting them')),
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          ('0', 'print0', None, _('end filenames with NUL, for use with xargs'
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                                  ' (implies -p)'))],
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         _('hg purge [OPTION]... [DIR]...'))
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}