|
|
# merge.py - directory-level update/merge handling for Mercurial
|
|
|
#
|
|
|
# Copyright 2006, 2007 Matt Mackall <mpm@selenic.com>
|
|
|
#
|
|
|
# This software may be used and distributed according to the terms
|
|
|
# of the GNU General Public License, incorporated herein by reference.
|
|
|
|
|
|
from node import nullid, nullrev, hex, bin
|
|
|
from i18n import _
|
|
|
import errno, util, os, filemerge, copies, shutil
|
|
|
|
|
|
class mergestate(object):
|
|
|
'''track 3-way merge state of individual files'''
|
|
|
def __init__(self, repo):
|
|
|
self._repo = repo
|
|
|
self._read()
|
|
|
def reset(self, node):
|
|
|
self._state = {}
|
|
|
self._local = node
|
|
|
shutil.rmtree(self._repo.join("merge"), True)
|
|
|
def _read(self):
|
|
|
self._state = {}
|
|
|
try:
|
|
|
localnode = None
|
|
|
f = self._repo.opener("merge/state")
|
|
|
for i, l in enumerate(f):
|
|
|
if i == 0:
|
|
|
localnode = l[:-1]
|
|
|
else:
|
|
|
bits = l[:-1].split("\0")
|
|
|
self._state[bits[0]] = bits[1:]
|
|
|
self._local = bin(localnode)
|
|
|
except IOError, err:
|
|
|
if err.errno != errno.ENOENT:
|
|
|
raise
|
|
|
def _write(self):
|
|
|
f = self._repo.opener("merge/state", "w")
|
|
|
f.write(hex(self._local) + "\n")
|
|
|
for d, v in self._state.items():
|
|
|
f.write("\0".join([d] + v) + "\n")
|
|
|
def add(self, fcl, fco, fca, fd, flags):
|
|
|
hash = util.sha1(fcl.path()).hexdigest()
|
|
|
self._repo.opener("merge/" + hash, "w").write(fcl.data())
|
|
|
self._state[fd] = ['u', hash, fcl.path(), fca.path(),
|
|
|
hex(fca.filenode()), fco.path(), flags]
|
|
|
self._write()
|
|
|
def __contains__(self, dfile):
|
|
|
return dfile in self._state
|
|
|
def __getitem__(self, dfile):
|
|
|
return self._state[dfile][0]
|
|
|
def __iter__(self):
|
|
|
l = self._state.keys()
|
|
|
l.sort()
|
|
|
for f in l:
|
|
|
yield f
|
|
|
def mark(self, dfile, state):
|
|
|
self._state[dfile][0] = state
|
|
|
self._write()
|
|
|
def resolve(self, dfile, wctx, octx):
|
|
|
if self[dfile] == 'r':
|
|
|
return 0
|
|
|
state, hash, lfile, afile, anode, ofile, flags = self._state[dfile]
|
|
|
f = self._repo.opener("merge/" + hash)
|
|
|
self._repo.wwrite(dfile, f.read(), flags)
|
|
|
fcd = wctx[dfile]
|
|
|
fco = octx[ofile]
|
|
|
fca = self._repo.filectx(afile, fileid=anode)
|
|
|
r = filemerge.filemerge(self._repo, self._local, lfile, fcd, fco, fca)
|
|
|
if not r:
|
|
|
self.mark(dfile, 'r')
|
|
|
return r
|
|
|
|
|
|
def _checkunknown(wctx, mctx):
|
|
|
"check for collisions between unknown files and files in mctx"
|
|
|
for f in wctx.unknown():
|
|
|
if f in mctx and mctx[f].cmp(wctx[f].data()):
|
|
|
raise util.Abort(_("untracked file in working directory differs"
|
|
|
" from file in requested revision: '%s'") % f)
|
|
|
|
|
|
def _checkcollision(mctx):
|
|
|
"check for case folding collisions in the destination context"
|
|
|
folded = {}
|
|
|
for fn in mctx:
|
|
|
fold = fn.lower()
|
|
|
if fold in folded:
|
|
|
raise util.Abort(_("case-folding collision between %s and %s")
|
|
|
% (fn, folded[fold]))
|
|
|
folded[fold] = fn
|
|
|
|
|
|
def _forgetremoved(wctx, mctx, branchmerge):
|
|
|
"""
|
|
|
Forget removed files
|
|
|
|
|
|
If we're jumping between revisions (as opposed to merging), and if
|
|
|
neither the working directory nor the target rev has the file,
|
|
|
then we need to remove it from the dirstate, to prevent the
|
|
|
dirstate from listing the file when it is no longer in the
|
|
|
manifest.
|
|
|
|
|
|
If we're merging, and the other revision has removed a file
|
|
|
that is not present in the working directory, we need to mark it
|
|
|
as removed.
|
|
|
"""
|
|
|
|
|
|
action = []
|
|
|
state = branchmerge and 'r' or 'f'
|
|
|
for f in wctx.deleted():
|
|
|
if f not in mctx:
|
|
|
action.append((f, state))
|
|
|
|
|
|
if not branchmerge:
|
|
|
for f in wctx.removed():
|
|
|
if f not in mctx:
|
|
|
action.append((f, "f"))
|
|
|
|
|
|
return action
|
|
|
|
|
|
def manifestmerge(repo, p1, p2, pa, overwrite, partial):
|
|
|
"""
|
|
|
Merge p1 and p2 with ancestor ma and generate merge action list
|
|
|
|
|
|
overwrite = whether we clobber working files
|
|
|
partial = function to filter file lists
|
|
|
"""
|
|
|
|
|
|
repo.ui.note(_("resolving manifests\n"))
|
|
|
repo.ui.debug(_(" overwrite %s partial %s\n") % (overwrite, bool(partial)))
|
|
|
repo.ui.debug(_(" ancestor %s local %s remote %s\n") % (pa, p1, p2))
|
|
|
|
|
|
m1 = p1.manifest()
|
|
|
m2 = p2.manifest()
|
|
|
ma = pa.manifest()
|
|
|
backwards = (pa == p2)
|
|
|
action = []
|
|
|
copy, copied, diverge = {}, {}, {}
|
|
|
|
|
|
def fmerge(f, f2=None, fa=None):
|
|
|
"""merge flags"""
|
|
|
if not f2:
|
|
|
f2 = f
|
|
|
fa = f
|
|
|
a, m, n = ma.flags(fa), m1.flags(f), m2.flags(f2)
|
|
|
if m == n: # flags agree
|
|
|
return m # unchanged
|
|
|
if m and n: # flags are set but don't agree
|
|
|
if not a: # both differ from parent
|
|
|
r = repo.ui.prompt(
|
|
|
_(" conflicting flags for %s\n"
|
|
|
"(n)one, e(x)ec or sym(l)ink?") % f, "[nxl]", "n")
|
|
|
return r != "n" and r or ''
|
|
|
if m == a:
|
|
|
return n # changed from m to n
|
|
|
return m # changed from n to m
|
|
|
if m and m != a: # changed from a to m
|
|
|
return m
|
|
|
if n and n != a: # changed from a to n
|
|
|
return n
|
|
|
return '' # flag was cleared
|
|
|
|
|
|
def act(msg, m, f, *args):
|
|
|
repo.ui.debug(" %s: %s -> %s\n" % (f, msg, m))
|
|
|
action.append((f, m) + args)
|
|
|
|
|
|
if pa and not (backwards or overwrite):
|
|
|
if repo.ui.configbool("merge", "followcopies", True):
|
|
|
dirs = repo.ui.configbool("merge", "followdirs", True)
|
|
|
copy, diverge = copies.copies(repo, p1, p2, pa, dirs)
|
|
|
copied = dict.fromkeys(copy.values())
|
|
|
for of, fl in diverge.items():
|
|
|
act("divergent renames", "dr", of, fl)
|
|
|
|
|
|
# Compare manifests
|
|
|
for f, n in m1.iteritems():
|
|
|
if partial and not partial(f):
|
|
|
continue
|
|
|
if f in m2:
|
|
|
if overwrite or backwards:
|
|
|
rflags = m2.flags(f)
|
|
|
else:
|
|
|
rflags = fmerge(f)
|
|
|
# are files different?
|
|
|
if n != m2[f]:
|
|
|
a = ma.get(f, nullid)
|
|
|
# are we clobbering?
|
|
|
if overwrite:
|
|
|
act("clobbering", "g", f, rflags)
|
|
|
# or are we going back in time and clean?
|
|
|
elif backwards and not n[20:]:
|
|
|
act("reverting", "g", f, rflags)
|
|
|
# are both different from the ancestor?
|
|
|
elif n != a and m2[f] != a:
|
|
|
act("versions differ", "m", f, f, f, rflags, False)
|
|
|
# is remote's version newer?
|
|
|
elif m2[f] != a:
|
|
|
act("remote is newer", "g", f, rflags)
|
|
|
# local is newer, not overwrite, check mode bits
|
|
|
elif m1.flags(f) != rflags:
|
|
|
act("update permissions", "e", f, rflags)
|
|
|
# contents same, check mode bits
|
|
|
elif m1.flags(f) != rflags:
|
|
|
act("update permissions", "e", f, rflags)
|
|
|
elif f in copied:
|
|
|
continue
|
|
|
elif f in copy:
|
|
|
f2 = copy[f]
|
|
|
if f2 not in m2: # directory rename
|
|
|
act("remote renamed directory to " + f2, "d",
|
|
|
f, None, f2, m1.flags(f))
|
|
|
elif f2 in m1: # case 2 A,B/B/B
|
|
|
act("local copied to " + f2, "m",
|
|
|
f, f2, f, fmerge(f, f2, f2), False)
|
|
|
else: # case 4,21 A/B/B
|
|
|
act("local moved to " + f2, "m",
|
|
|
f, f2, f, fmerge(f, f2, f2), False)
|
|
|
elif f in ma:
|
|
|
if n != ma[f] and not overwrite:
|
|
|
if repo.ui.prompt(
|
|
|
_(" local changed %s which remote deleted\n"
|
|
|
"use (c)hanged version or (d)elete?") % f,
|
|
|
_("[cd]"), _("c")) == _("d"):
|
|
|
act("prompt delete", "r", f)
|
|
|
else:
|
|
|
act("other deleted", "r", f)
|
|
|
else:
|
|
|
# file is created on branch or in working directory
|
|
|
if (overwrite and n[20:] != "u") or (backwards and not n[20:]):
|
|
|
act("remote deleted", "r", f)
|
|
|
|
|
|
for f, n in m2.iteritems():
|
|
|
if partial and not partial(f):
|
|
|
continue
|
|
|
if f in m1:
|
|
|
continue
|
|
|
if f in copied:
|
|
|
continue
|
|
|
if f in copy:
|
|
|
f2 = copy[f]
|
|
|
if f2 not in m1: # directory rename
|
|
|
act("local renamed directory to " + f2, "d",
|
|
|
None, f, f2, m2.flags(f))
|
|
|
elif f2 in m2: # rename case 1, A/A,B/A
|
|
|
act("remote copied to " + f, "m",
|
|
|
f2, f, f, fmerge(f2, f, f2), False)
|
|
|
else: # case 3,20 A/B/A
|
|
|
act("remote moved to " + f, "m",
|
|
|
f2, f, f, fmerge(f2, f, f2), True)
|
|
|
elif f in ma:
|
|
|
if overwrite or backwards:
|
|
|
act("recreating", "g", f, m2.flags(f))
|
|
|
elif n != ma[f]:
|
|
|
if repo.ui.prompt(
|
|
|
_("remote changed %s which local deleted\n"
|
|
|
"use (c)hanged version or leave (d)eleted?") % f,
|
|
|
_("[cd]"), _("c")) == _("c"):
|
|
|
act("prompt recreating", "g", f, m2.flags(f))
|
|
|
else:
|
|
|
act("remote created", "g", f, m2.flags(f))
|
|
|
|
|
|
return action
|
|
|
|
|
|
def applyupdates(repo, action, wctx, mctx):
|
|
|
"apply the merge action list to the working directory"
|
|
|
|
|
|
updated, merged, removed, unresolved = 0, 0, 0, 0
|
|
|
action.sort()
|
|
|
|
|
|
ms = mergestate(repo)
|
|
|
ms.reset(wctx.parents()[0].node())
|
|
|
moves = []
|
|
|
|
|
|
# prescan for merges
|
|
|
for a in action:
|
|
|
f, m = a[:2]
|
|
|
if m == 'm': # merge
|
|
|
f2, fd, flags, move = a[2:]
|
|
|
repo.ui.debug(_("preserving %s for resolve of %s\n") % (f, fd))
|
|
|
fcl = wctx[f]
|
|
|
fco = mctx[f2]
|
|
|
fca = fcl.ancestor(fco) or repo.filectx(f, fileid=nullrev)
|
|
|
ms.add(fcl, fco, fca, fd, flags)
|
|
|
if f != fd and move:
|
|
|
moves.append(f)
|
|
|
|
|
|
# remove renamed files after safely stored
|
|
|
for f in moves:
|
|
|
if util.lexists(repo.wjoin(f)):
|
|
|
repo.ui.debug(_("removing %s\n") % f)
|
|
|
os.unlink(repo.wjoin(f))
|
|
|
|
|
|
audit_path = util.path_auditor(repo.root)
|
|
|
|
|
|
for a in action:
|
|
|
f, m = a[:2]
|
|
|
if f and f[0] == "/":
|
|
|
continue
|
|
|
if m == "r": # remove
|
|
|
repo.ui.note(_("removing %s\n") % f)
|
|
|
audit_path(f)
|
|
|
try:
|
|
|
util.unlink(repo.wjoin(f))
|
|
|
except OSError, inst:
|
|
|
if inst.errno != errno.ENOENT:
|
|
|
repo.ui.warn(_("update failed to remove %s: %s!\n") %
|
|
|
(f, inst.strerror))
|
|
|
removed += 1
|
|
|
elif m == "m": # merge
|
|
|
f2, fd, flags, move = a[2:]
|
|
|
r = ms.resolve(fd, wctx, mctx)
|
|
|
if r > 0:
|
|
|
unresolved += 1
|
|
|
else:
|
|
|
if r is None:
|
|
|
updated += 1
|
|
|
else:
|
|
|
merged += 1
|
|
|
elif m == "g": # get
|
|
|
flags = a[2]
|
|
|
repo.ui.note(_("getting %s\n") % f)
|
|
|
t = mctx.filectx(f).data()
|
|
|
repo.wwrite(f, t, flags)
|
|
|
updated += 1
|
|
|
elif m == "d": # directory rename
|
|
|
f2, fd, flags = a[2:]
|
|
|
if f:
|
|
|
repo.ui.note(_("moving %s to %s\n") % (f, fd))
|
|
|
t = wctx.filectx(f).data()
|
|
|
repo.wwrite(fd, t, flags)
|
|
|
util.unlink(repo.wjoin(f))
|
|
|
if f2:
|
|
|
repo.ui.note(_("getting %s to %s\n") % (f2, fd))
|
|
|
t = mctx.filectx(f2).data()
|
|
|
repo.wwrite(fd, t, flags)
|
|
|
updated += 1
|
|
|
elif m == "dr": # divergent renames
|
|
|
fl = a[2]
|
|
|
repo.ui.warn("warning: detected divergent renames of %s to:\n" % f)
|
|
|
for nf in fl:
|
|
|
repo.ui.warn(" %s\n" % nf)
|
|
|
elif m == "e": # exec
|
|
|
flags = a[2]
|
|
|
util.set_flags(repo.wjoin(f), flags)
|
|
|
|
|
|
return updated, merged, removed, unresolved
|
|
|
|
|
|
def recordupdates(repo, action, branchmerge):
|
|
|
"record merge actions to the dirstate"
|
|
|
|
|
|
for a in action:
|
|
|
f, m = a[:2]
|
|
|
if m == "r": # remove
|
|
|
if branchmerge:
|
|
|
repo.dirstate.remove(f)
|
|
|
else:
|
|
|
repo.dirstate.forget(f)
|
|
|
elif m == "f": # forget
|
|
|
repo.dirstate.forget(f)
|
|
|
elif m in "ge": # get or exec change
|
|
|
if branchmerge:
|
|
|
repo.dirstate.normaldirty(f)
|
|
|
else:
|
|
|
repo.dirstate.normal(f)
|
|
|
elif m == "m": # merge
|
|
|
f2, fd, flag, move = a[2:]
|
|
|
if branchmerge:
|
|
|
# We've done a branch merge, mark this file as merged
|
|
|
# so that we properly record the merger later
|
|
|
repo.dirstate.merge(fd)
|
|
|
if f != f2: # copy/rename
|
|
|
if move:
|
|
|
repo.dirstate.remove(f)
|
|
|
if f != fd:
|
|
|
repo.dirstate.copy(f, fd)
|
|
|
else:
|
|
|
repo.dirstate.copy(f2, fd)
|
|
|
else:
|
|
|
# We've update-merged a locally modified file, so
|
|
|
# we set the dirstate to emulate a normal checkout
|
|
|
# of that file some time in the past. Thus our
|
|
|
# merge will appear as a normal local file
|
|
|
# modification.
|
|
|
repo.dirstate.normallookup(fd)
|
|
|
if move:
|
|
|
repo.dirstate.forget(f)
|
|
|
elif m == "d": # directory rename
|
|
|
f2, fd, flag = a[2:]
|
|
|
if not f2 and f not in repo.dirstate:
|
|
|
# untracked file moved
|
|
|
continue
|
|
|
if branchmerge:
|
|
|
repo.dirstate.add(fd)
|
|
|
if f:
|
|
|
repo.dirstate.remove(f)
|
|
|
repo.dirstate.copy(f, fd)
|
|
|
if f2:
|
|
|
repo.dirstate.copy(f2, fd)
|
|
|
else:
|
|
|
repo.dirstate.normal(fd)
|
|
|
if f:
|
|
|
repo.dirstate.forget(f)
|
|
|
|
|
|
def update(repo, node, branchmerge, force, partial):
|
|
|
"""
|
|
|
Perform a merge between the working directory and the given node
|
|
|
|
|
|
branchmerge = whether to merge between branches
|
|
|
force = whether to force branch merging or file overwriting
|
|
|
partial = a function to filter file lists (dirstate not updated)
|
|
|
"""
|
|
|
|
|
|
wlock = repo.wlock()
|
|
|
try:
|
|
|
wc = repo.changectx(None)
|
|
|
if node is None:
|
|
|
# tip of current branch
|
|
|
try:
|
|
|
node = repo.branchtags()[wc.branch()]
|
|
|
except KeyError:
|
|
|
if wc.branch() == "default": # no default branch!
|
|
|
node = repo.lookup("tip") # update to tip
|
|
|
else:
|
|
|
raise util.Abort(_("branch %s not found") % wc.branch())
|
|
|
overwrite = force and not branchmerge
|
|
|
pl = wc.parents()
|
|
|
p1, p2 = pl[0], repo.changectx(node)
|
|
|
pa = p1.ancestor(p2)
|
|
|
fp1, fp2, xp1, xp2 = p1.node(), p2.node(), str(p1), str(p2)
|
|
|
fastforward = False
|
|
|
|
|
|
### check phase
|
|
|
if not overwrite and len(pl) > 1:
|
|
|
raise util.Abort(_("outstanding uncommitted merges"))
|
|
|
if branchmerge:
|
|
|
if pa == p2:
|
|
|
raise util.Abort(_("can't merge with ancestor"))
|
|
|
elif pa == p1:
|
|
|
if p1.branch() != p2.branch():
|
|
|
fastforward = True
|
|
|
else:
|
|
|
raise util.Abort(_("nothing to merge (use 'hg update'"
|
|
|
" or check 'hg heads')"))
|
|
|
if not force and (wc.files() or wc.deleted()):
|
|
|
raise util.Abort(_("outstanding uncommitted changes"))
|
|
|
elif not overwrite:
|
|
|
if pa == p1 or pa == p2: # linear
|
|
|
pass # all good
|
|
|
elif p1.branch() == p2.branch():
|
|
|
if wc.files() or wc.deleted():
|
|
|
raise util.Abort(_("crosses branches (use 'hg merge' or "
|
|
|
"'hg update -C' to discard changes)"))
|
|
|
raise util.Abort(_("crosses branches (use 'hg merge' "
|
|
|
"or 'hg update -C')"))
|
|
|
elif wc.files() or wc.deleted():
|
|
|
raise util.Abort(_("crosses named branches (use "
|
|
|
"'hg update -C' to discard changes)"))
|
|
|
else:
|
|
|
# Allow jumping branches if there are no changes
|
|
|
overwrite = True
|
|
|
|
|
|
### calculate phase
|
|
|
action = []
|
|
|
if not force:
|
|
|
_checkunknown(wc, p2)
|
|
|
if not util.checkfolding(repo.path):
|
|
|
_checkcollision(p2)
|
|
|
action += _forgetremoved(wc, p2, branchmerge)
|
|
|
action += manifestmerge(repo, wc, p2, pa, overwrite, partial)
|
|
|
|
|
|
### apply phase
|
|
|
if not branchmerge: # just jump to the new rev
|
|
|
fp1, fp2, xp1, xp2 = fp2, nullid, xp2, ''
|
|
|
if not partial:
|
|
|
repo.hook('preupdate', throw=True, parent1=xp1, parent2=xp2)
|
|
|
|
|
|
stats = applyupdates(repo, action, wc, p2)
|
|
|
|
|
|
if not partial:
|
|
|
recordupdates(repo, action, branchmerge)
|
|
|
repo.dirstate.setparents(fp1, fp2)
|
|
|
if not branchmerge and not fastforward:
|
|
|
repo.dirstate.setbranch(p2.branch())
|
|
|
repo.hook('update', parent1=xp1, parent2=xp2, error=stats[3])
|
|
|
|
|
|
return stats
|
|
|
finally:
|
|
|
del wlock
|
|
|
|
