Mercurial > hg
view mercurial/repair.py @ 8564:6b9ec23b09fc
named branches: improve pre-push logic (issue736)
Each named branch is considered separately, and the push is allowed if
no new branch heads are created for any named branch to be pushed.
Due to some tests's use of --debug, their output will change after this
addition. This has been fixed as well.
Co-contributor: Henrik Stuart <henrik.stuart@edlund.dk>
author | Sune Foldager <cryo@cyanite.org> |
---|---|
date | Sat, 23 May 2009 17:04:31 +0200 |
parents | 3e16c0fc2241 |
children | 2b3dec0ef3ae |
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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 version 2, incorporated herein by reference. import changegroup from node import nullrev, short from i18n import _ import os 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 = set() for x in xrange(striprev, len(repo)): files.update(repo[x].files()) return sorted(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): lrev = revlog.linkrev(i) 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(i) 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 = set((striprev,)) saveheads = set() 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.add(r) # 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.add(p) 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)) saveheads.difference_update(parents) saveheads.add(r) 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) fs = [repo.file(name) for name in files] mfst = repo.manifest tr = repo.transaction() offset = len(tr.entries) tr.startgroup() cl.strip(striprev, tr) mfst.strip(striprev, tr) for f in fs: f.strip(striprev, tr) tr.endgroup() try: for i in xrange(offset, len(tr.entries)): file, troffset, ignore = tr.entries[i] repo.sopener(file, 'a').truncate(troffset) tr.close() except: tr.abort() raise 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)