Mercurial > hg
view mercurial/repair.py @ 7090:7b5c063b0b94
diff: pass contexts to status
Allow status() to take contexts as well as nodes. This lets us avoid
unpacking manifests multiple times and intelligently unpack manifests
in revision order. Also, we can avoid unpacking manifests at all when
there are no changes in the working directory.
author | Matt Mackall <mpm@selenic.com> |
---|---|
date | Sun, 12 Oct 2008 15:21:08 -0500 |
parents | 63b5f4c73c98 |
children | 9fe97eea5510 |
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# repair.py - functions for repository repair for mercurial # # Copyright 2005, 2006 Chris Mason <mason@suse.com> # Copyright 2007 Matt Mackall # # This software may be used and distributed according to the terms # of the GNU General Public License, incorporated herein by reference. import changegroup, os from node import nullrev, short from i18n import _ def _bundle(repo, bases, heads, node, suffix, extranodes=None): """create a bundle with the specified revisions as a backup""" cg = repo.changegroupsubset(bases, heads, 'strip', extranodes) backupdir = repo.join("strip-backup") if not os.path.isdir(backupdir): os.mkdir(backupdir) name = os.path.join(backupdir, "%s-%s" % (short(node), suffix)) repo.ui.warn(_("saving bundle to %s\n") % name) return changegroup.writebundle(cg, name, "HG10BZ") def _collectfiles(repo, striprev): """find out the filelogs affected by the strip""" files = {} for x in xrange(striprev, len(repo)): for name in repo[x].files(): if name in files: continue files[name] = 1 files = files.keys() files.sort() return files def _collectextranodes(repo, files, link): """return the nodes that have to be saved before the strip""" def collectone(revlog): extra = [] startrev = count = len(revlog) # find the truncation point of the revlog for i in xrange(0, count): node = revlog.node(i) lrev = revlog.linkrev(node) if lrev >= link: startrev = i + 1 break # see if any revision after that point has a linkrev less than link # (we have to manually save these guys) for i in xrange(startrev, count): node = revlog.node(i) lrev = revlog.linkrev(node) if lrev < link: extra.append((node, cl.node(lrev))) return extra extranodes = {} cl = repo.changelog extra = collectone(repo.manifest) if extra: extranodes[1] = extra for fname in files: f = repo.file(fname) extra = collectone(f) if extra: extranodes[fname] = extra return extranodes def strip(ui, repo, node, backup="all"): cl = repo.changelog # TODO delete the undo files, and handle undo of merge sets striprev = cl.rev(node) # Some revisions with rev > striprev may not be descendants of striprev. # We have to find these revisions and put them in a bundle, so that # we can restore them after the truncations. # To create the bundle we use repo.changegroupsubset which requires # the list of heads and bases of the set of interesting revisions. # (head = revision in the set that has no descendant in the set; # base = revision in the set that has no ancestor in the set) tostrip = {striprev: 1} saveheads = {} savebases = [] for r in xrange(striprev + 1, len(cl)): parents = cl.parentrevs(r) if parents[0] in tostrip or parents[1] in tostrip: # r is a descendant of striprev tostrip[r] = 1 # if this is a merge and one of the parents does not descend # from striprev, mark that parent as a savehead. if parents[1] != nullrev: for p in parents: if p not in tostrip and p > striprev: saveheads[p] = 1 else: # if no parents of this revision will be stripped, mark it as # a savebase if parents[0] < striprev and parents[1] < striprev: savebases.append(cl.node(r)) for p in parents: if p in saveheads: del saveheads[p] saveheads[r] = 1 saveheads = [cl.node(r) for r in saveheads] files = _collectfiles(repo, striprev) extranodes = _collectextranodes(repo, files, striprev) # create a changegroup for all the branches we need to keep if backup == "all": _bundle(repo, [node], cl.heads(), node, 'backup') if saveheads or extranodes: chgrpfile = _bundle(repo, savebases, saveheads, node, 'temp', extranodes) cl.strip(striprev) repo.manifest.strip(striprev) for name in files: f = repo.file(name) f.strip(striprev) if saveheads or extranodes: ui.status(_("adding branch\n")) f = open(chgrpfile, "rb") gen = changegroup.readbundle(f, chgrpfile) repo.addchangegroup(gen, 'strip', 'bundle:' + chgrpfile, True) f.close() if backup != "strip": os.unlink(chgrpfile)