mercurial/repair.py
author Pierre-Yves David <pierre-yves.david@fb.com>
Tue, 01 Apr 2014 14:25:03 -0700
changeset 20927 24a443948627
parent 20885 f49d60fa40a5
child 20933 d3775db748a0
permissions -rw-r--r--
localrepo: move the changegroupsubset method in changegroup module This is a gratuitous code move aimed at reducing the localrepo bloatness. The method had few callers, not enough to be kept in local repo. The peer API remains unchanged.
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# repair.py - functions for repository repair for mercurial
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#
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# Copyright 2005, 2006 Chris Mason <mason@suse.com>
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# Copyright 2007 Matt Mackall
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#
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# This software may be used and distributed according to the terms of the
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# GNU General Public License version 2 or any later version.
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from mercurial import changegroup
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from mercurial.node import short
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from mercurial.i18n import _
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import os
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import errno
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def _bundle(repo, bases, heads, node, suffix, compress=True):
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    """create a bundle with the specified revisions as a backup"""
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    cg = changegroup.changegroupsubset(repo, bases, heads, 'strip')
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    backupdir = repo.join("strip-backup")
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    if not os.path.isdir(backupdir):
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        os.mkdir(backupdir)
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    name = os.path.join(backupdir, "%s-%s.hg" % (short(node), suffix))
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    if compress:
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        bundletype = "HG10BZ"
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    else:
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        bundletype = "HG10UN"
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    return changegroup.writebundle(cg, name, bundletype)
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def _collectfiles(repo, striprev):
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    """find out the filelogs affected by the strip"""
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    files = set()
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    for x in xrange(striprev, len(repo)):
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        files.update(repo[x].files())
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    return sorted(files)
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def _collectbrokencsets(repo, files, striprev):
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    """return the changesets which will be broken by the truncation"""
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    s = set()
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    def collectone(revlog):
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        _, brokenset = revlog.getstrippoint(striprev)
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        s.update([revlog.linkrev(r) for r in brokenset])
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    collectone(repo.manifest)
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    for fname in files:
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        collectone(repo.file(fname))
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    return s
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def strip(ui, repo, nodelist, backup="all", topic='backup'):
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    repo = repo.unfiltered()
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    repo.destroying()
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    cl = repo.changelog
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    # TODO handle undo of merge sets
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    if isinstance(nodelist, str):
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        nodelist = [nodelist]
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    striplist = [cl.rev(node) for node in nodelist]
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    striprev = min(striplist)
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    keeppartialbundle = backup == 'strip'
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    # Some revisions with rev > striprev may not be descendants of striprev.
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    # We have to find these revisions and put them in a bundle, so that
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    # we can restore them after the truncations.
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    # To create the bundle we use repo.changegroupsubset which requires
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    # the list of heads and bases of the set of interesting revisions.
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    # (head = revision in the set that has no descendant in the set;
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    #  base = revision in the set that has no ancestor in the set)
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    tostrip = set(striplist)
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    for rev in striplist:
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        for desc in cl.descendants([rev]):
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            tostrip.add(desc)
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    files = _collectfiles(repo, striprev)
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    saverevs = _collectbrokencsets(repo, files, striprev)
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    # compute heads
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    saveheads = set(saverevs)
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    for r in xrange(striprev + 1, len(cl)):
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        if r not in tostrip:
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            saverevs.add(r)
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            saveheads.difference_update(cl.parentrevs(r))
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            saveheads.add(r)
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    saveheads = [cl.node(r) for r in saveheads]
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    # compute base nodes
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    if saverevs:
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        descendants = set(cl.descendants(saverevs))
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        saverevs.difference_update(descendants)
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    savebases = [cl.node(r) for r in saverevs]
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    stripbases = [cl.node(r) for r in tostrip]
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    # For a set s, max(parents(s) - s) is the same as max(heads(::s - s)), but
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    # is much faster
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    newbmtarget = repo.revs('max(parents(%ld) - (%ld))', tostrip, tostrip)
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    if newbmtarget:
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        newbmtarget = repo[newbmtarget[0]].node()
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    else:
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        newbmtarget = '.'
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    bm = repo._bookmarks
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    updatebm = []
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    for m in bm:
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        rev = repo[bm[m]].rev()
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        if rev in tostrip:
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            updatebm.append(m)
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    # create a changegroup for all the branches we need to keep
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    backupfile = None
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    if backup == "all":
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        backupfile = _bundle(repo, stripbases, cl.heads(), node, topic)
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        repo.ui.status(_("saved backup bundle to %s\n") % backupfile)
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        repo.ui.log("backupbundle", "saved backup bundle to %s\n", backupfile)
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    if saveheads or savebases:
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        # do not compress partial bundle if we remove it from disk later
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        chgrpfile = _bundle(repo, savebases, saveheads, node, 'temp',
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                            compress=keeppartialbundle)
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   120
    mfst = repo.manifest
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parents: 7361
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   121
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parents: 10263
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   122
    tr = repo.transaction("strip")
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   123
    offset = len(tr.entries)
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   124
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parents: 10881
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   125
    try:
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   126
        tr.startgroup()
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   127
        cl.strip(striprev, tr)
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   128
        mfst.strip(striprev, tr)
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parents: 10881
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   129
        for fn in files:
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parents: 10881
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   130
            repo.file(fn).strip(striprev, tr)
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parents: 10881
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   131
        tr.endgroup()
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parents: 7361
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   132
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   133
        try:
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parents: 10881
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   134
            for i in xrange(offset, len(tr.entries)):
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parents: 10881
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   135
                file, troffset, ignore = tr.entries[i]
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parents: 10881
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   136
                repo.sopener(file, 'a').truncate(troffset)
20885
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Durham Goode <durham@fb.com>
parents: 20074
diff changeset
   137
                if troffset == 0:
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Durham Goode <durham@fb.com>
parents: 20074
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   138
                    repo.store.markremoved(file)
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parents: 10881
diff changeset
   139
            tr.close()
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Brodie Rao <brodie@sf.io>
parents: 16628
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   140
        except: # re-raises
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parents: 10881
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   141
            tr.abort()
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parents: 10881
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   142
            raise
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parents: 10881
diff changeset
   143
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6051d8e7e133 strip: backout 73307643a09f (issue3077)
Matt Mackall <mpm@selenic.com>
parents: 15068
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   144
        if saveheads or savebases:
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Matt Mackall <mpm@selenic.com>
parents: 11200
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   145
            ui.note(_("adding branch\n"))
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parents: 10881
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   146
            f = open(chgrpfile, "rb")
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parents: 10881
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   147
            gen = changegroup.readbundle(f, chgrpfile)
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parents: 11200
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   148
            if not repo.ui.verbose:
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parents: 11200
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   149
                # silence internal shuffling chatter
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parents: 11200
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   150
                repo.ui.pushbuffer()
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parents: 10881
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   151
            repo.addchangegroup(gen, 'strip', 'bundle:' + chgrpfile, True)
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parents: 11200
diff changeset
   152
            if not repo.ui.verbose:
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parents: 11200
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   153
                repo.ui.popbuffer()
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parents: 10881
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   154
            f.close()
11791
00cde9bddbe4 repair: do not compress partial bundle if we do not keep it on disk
Nicolas Dumazet <nicdumz.commits@gmail.com>
parents: 11600
diff changeset
   155
            if not keeppartialbundle:
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parents: 10881
diff changeset
   156
                os.unlink(chgrpfile)
13362
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Matt Mackall <mpm@selenic.com>
parents: 12057
diff changeset
   157
16237
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Idan Kamara <idankk86@gmail.com>
parents: 15901
diff changeset
   158
        # remove undo files
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parents: 15901
diff changeset
   159
        for undofile in repo.undofiles():
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parents: 15901
diff changeset
   160
            try:
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parents: 15901
diff changeset
   161
                os.unlink(undofile)
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parents: 15901
diff changeset
   162
            except OSError, e:
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Idan Kamara <idankk86@gmail.com>
parents: 15901
diff changeset
   163
                if e.errno != errno.ENOENT:
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Idan Kamara <idankk86@gmail.com>
parents: 15901
diff changeset
   164
                    ui.warn(_('error removing %s: %s\n') % (undofile, str(e)))
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Idan Kamara <idankk86@gmail.com>
parents: 15901
diff changeset
   165
13362
ee01d9d84115 bookmarks: move strip support to repair
Matt Mackall <mpm@selenic.com>
parents: 12057
diff changeset
   166
        for m in updatebm:
17264
ec7b9bec19c9 strip: move bookmarks to nearest ancestor rather than '.'
Augie Fackler <raf@durin42.com>
parents: 17013
diff changeset
   167
            bm[m] = repo[newbmtarget].node()
17922
7f5dab94e48c bookmarks: introduce a bmstore to manage bookmark persistence
Augie Fackler <raf@durin42.com>
parents: 17796
diff changeset
   168
        bm.write()
16705
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Brodie Rao <brodie@sf.io>
parents: 16628
diff changeset
   169
    except: # re-raises
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Matt Mackall <mpm@selenic.com>
parents: 10881
diff changeset
   170
        if backupfile:
11600
76454cbc11e4 mark ui.warn strings for translation
Martin Geisler <mg@lazybytes.net>
parents: 11333
diff changeset
   171
            ui.warn(_("strip failed, full bundle stored in '%s'\n")
76454cbc11e4 mark ui.warn strings for translation
Martin Geisler <mg@lazybytes.net>
parents: 11333
diff changeset
   172
                    % backupfile)
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parents: 10881
diff changeset
   173
        elif saveheads:
11600
76454cbc11e4 mark ui.warn strings for translation
Martin Geisler <mg@lazybytes.net>
parents: 11333
diff changeset
   174
            ui.warn(_("strip failed, partial bundle stored in '%s'\n")
11197
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Matt Mackall <mpm@selenic.com>
parents: 10881
diff changeset
   175
                    % chgrpfile)
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Henrik Stuart <henrik.stuart@edlund.dk>
parents: 7361
diff changeset
   176
        raise
4702
18e91c9def0c strip: move strip code to a new repair module
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
   177
18395
904b7109938e destroyed: drop complex branchcache rebuilt logic
Pierre-Yves David <pierre-yves.david@logilab.fr>
parents: 18311
diff changeset
   178
    repo.destroyed()