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9766845689
Bookmarks persistence still showed a fair amount of its legacy as a monkeypatching extension. This encapsulates all bookmarks serialization and parsing in a single class, and offers a single location where other bookmarks storage engines can be substituted in. As a result, many files no longer import the bookmarks module, which strikes me as an encapsulation win. This doesn't do anything to the current bookmark state yet, but I'm hoping put that in the bmstore class as well.
201 lines
6.9 KiB
Python
201 lines
6.9 KiB
Python
# 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 = repo.changegroupsubset(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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linkgen = (revlog.linkrev(i) for i in revlog)
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# find the truncation point of the revlog
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for lrev in linkgen:
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if lrev >= striprev:
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break
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# see if any revision after this point has a linkrev
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# less than striprev (those will be broken by strip)
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for lrev in linkgen:
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if lrev < striprev:
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s.add(lrev)
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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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# It simplifies the logic around updating the branchheads cache if we only
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# have to consider the effect of the stripped revisions and not revisions
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# missing because the cache is out-of-date.
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repo.updatebranchcache()
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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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# Generate set of branches who will have nodes stripped.
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striprevs = repo.revs("%ld::", striplist)
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stripbranches = set([repo[rev].branch() for rev in striprevs])
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# Set of potential new heads resulting from the strip. The parents of any
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# node removed could be a new head because the node to be removed could have
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# been the only child of the parent.
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newheadrevs = repo.revs("parents(%ld::) - %ld::", striprevs, striprevs)
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newheadnodes = set([cl.node(rev) for rev in newheadrevs])
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newheadbranches = set([repo[rev].branch() for rev in newheadrevs])
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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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newbmtarget = repo.revs('sort(heads((::%ld) - (%ld)), -rev)',
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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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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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mfst = repo.manifest
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tr = repo.transaction("strip")
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offset = len(tr.entries)
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try:
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tr.startgroup()
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cl.strip(striprev, tr)
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mfst.strip(striprev, tr)
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for fn in files:
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repo.file(fn).strip(striprev, tr)
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tr.endgroup()
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try:
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for i in xrange(offset, len(tr.entries)):
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file, troffset, ignore = tr.entries[i]
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repo.sopener(file, 'a').truncate(troffset)
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tr.close()
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except: # re-raises
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tr.abort()
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raise
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if saveheads or savebases:
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ui.note(_("adding branch\n"))
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f = open(chgrpfile, "rb")
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gen = changegroup.readbundle(f, chgrpfile)
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if not repo.ui.verbose:
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# silence internal shuffling chatter
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repo.ui.pushbuffer()
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repo.addchangegroup(gen, 'strip', 'bundle:' + chgrpfile, True)
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if not repo.ui.verbose:
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repo.ui.popbuffer()
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f.close()
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if not keeppartialbundle:
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os.unlink(chgrpfile)
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# remove undo files
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for undofile in repo.undofiles():
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try:
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os.unlink(undofile)
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except OSError, e:
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if e.errno != errno.ENOENT:
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ui.warn(_('error removing %s: %s\n') % (undofile, str(e)))
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for m in updatebm:
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bm[m] = repo[newbmtarget].node()
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bm.write()
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except: # re-raises
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if backupfile:
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ui.warn(_("strip failed, full bundle stored in '%s'\n")
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% backupfile)
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elif saveheads:
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ui.warn(_("strip failed, partial bundle stored in '%s'\n")
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% chgrpfile)
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raise
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if len(stripbranches) == 1 and len(newheadbranches) == 1 \
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and stripbranches == newheadbranches:
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repo.destroyed(newheadnodes)
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else:
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# Multiple branches involved in strip. Will allow branchcache to become
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# invalid and later on rebuilt from scratch
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repo.destroyed()
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