merge: provide *_ISLINK environment vars to merge helper
Sets HG_MY_ISLINK, HG_OTHER_ISLINK, HG_BASE_ISLINK in environment. Without these variables, it's impossible for the merge application to know whether the 'other' and 'base' files were symlinks in their original contexts. For the purposes of the merge they are always emitted as small text files.
# 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, revlog, os, commands
def strip(ui, repo, rev, backup="all"):
def limitheads(chlog, stop):
"""return the list of all nodes that have no children"""
p = {}
h = []
stoprev = 0
if stop in chlog.nodemap:
stoprev = chlog.rev(stop)
for r in xrange(chlog.count() - 1, -1, -1):
n = chlog.node(r)
if n not in p:
h.append(n)
if n == stop:
break
if r < stoprev:
break
for pn in chlog.parents(n):
p[pn] = 1
return h
def bundle(repo, bases, heads, rev, suffix):
cg = repo.changegroupsubset(bases, heads, 'strip')
backupdir = repo.join("strip-backup")
if not os.path.isdir(backupdir):
os.mkdir(backupdir)
name = os.path.join(backupdir, "%s-%s" % (revlog.short(rev), suffix))
ui.warn("saving bundle to %s\n" % name)
return changegroup.writebundle(cg, name, "HG10BZ")
def stripall(revnum):
mm = repo.changectx(rev).manifest()
seen = {}
for x in xrange(revnum, repo.changelog.count()):
for f in repo.changectx(x).files():
if f in seen:
continue
seen[f] = 1
if f in mm:
filerev = mm[f]
else:
filerev = 0
seen[f] = filerev
# we go in two steps here so the strip loop happens in a
# sensible order. When stripping many files, this helps keep
# our disk access patterns under control.
seen_list = seen.keys()
seen_list.sort()
for f in seen_list:
ff = repo.file(f)
filerev = seen[f]
if filerev != 0:
if filerev in ff.nodemap:
filerev = ff.rev(filerev)
else:
filerev = 0
ff.strip(filerev, revnum)
chlog = repo.changelog
# TODO delete the undo files, and handle undo of merge sets
pp = chlog.parents(rev)
revnum = chlog.rev(rev)
# save is a list of all the branches we are truncating away
# that we actually want to keep. changegroup will be used
# to preserve them and add them back after the truncate
saveheads = []
savebases = {}
heads = limitheads(chlog, rev)
seen = {}
# search through all the heads, finding those where the revision
# we want to strip away is an ancestor. Also look for merges
# that might be turned into new heads by the strip.
while heads:
h = heads.pop()
n = h
while True:
seen[n] = 1
pp = chlog.parents(n)
if pp[1] != revlog.nullid:
for p in pp:
if chlog.rev(p) > revnum and p not in seen:
heads.append(p)
if pp[0] == revlog.nullid:
break
if chlog.rev(pp[0]) < revnum:
break
n = pp[0]
if n == rev:
break
r = chlog.reachable(h, rev)
if rev not in r:
saveheads.append(h)
for x in r:
if chlog.rev(x) > revnum:
savebases[x] = 1
# create a changegroup for all the branches we need to keep
if backup == "all":
bundle(repo, [rev], chlog.heads(), rev, 'backup')
if saveheads:
chgrpfile = bundle(repo, savebases.keys(), saveheads, rev, 'temp')
stripall(revnum)
change = chlog.read(rev)
chlog.strip(revnum, revnum)
repo.manifest.strip(repo.manifest.rev(change[0]), revnum)
if saveheads:
ui.status("adding branch\n")
commands.unbundle(ui, repo, "file:%s" % chgrpfile, update=False)
if backup != "strip":
os.unlink(chgrpfile)