|
|
# copies.py - copy detection for Mercurial
|
|
|
#
|
|
|
# Copyright 2008 Matt Mackall <mpm@selenic.com>
|
|
|
#
|
|
|
# This software may be used and distributed according to the terms of the
|
|
|
# GNU General Public License version 2 or any later version.
|
|
|
|
|
|
from __future__ import absolute_import
|
|
|
|
|
|
import heapq
|
|
|
|
|
|
from . import (
|
|
|
node,
|
|
|
pathutil,
|
|
|
scmutil,
|
|
|
util,
|
|
|
)
|
|
|
|
|
|
def _findlimit(repo, a, b):
|
|
|
"""
|
|
|
Find the last revision that needs to be checked to ensure that a full
|
|
|
transitive closure for file copies can be properly calculated.
|
|
|
Generally, this means finding the earliest revision number that's an
|
|
|
ancestor of a or b but not both, except when a or b is a direct descendent
|
|
|
of the other, in which case we can return the minimum revnum of a and b.
|
|
|
None if no such revision exists.
|
|
|
"""
|
|
|
|
|
|
# basic idea:
|
|
|
# - mark a and b with different sides
|
|
|
# - if a parent's children are all on the same side, the parent is
|
|
|
# on that side, otherwise it is on no side
|
|
|
# - walk the graph in topological order with the help of a heap;
|
|
|
# - add unseen parents to side map
|
|
|
# - clear side of any parent that has children on different sides
|
|
|
# - track number of interesting revs that might still be on a side
|
|
|
# - track the lowest interesting rev seen
|
|
|
# - quit when interesting revs is zero
|
|
|
|
|
|
cl = repo.changelog
|
|
|
working = len(cl) # pseudo rev for the working directory
|
|
|
if a is None:
|
|
|
a = working
|
|
|
if b is None:
|
|
|
b = working
|
|
|
|
|
|
side = {a: -1, b: 1}
|
|
|
visit = [-a, -b]
|
|
|
heapq.heapify(visit)
|
|
|
interesting = len(visit)
|
|
|
hascommonancestor = False
|
|
|
limit = working
|
|
|
|
|
|
while interesting:
|
|
|
r = -heapq.heappop(visit)
|
|
|
if r == working:
|
|
|
parents = [cl.rev(p) for p in repo.dirstate.parents()]
|
|
|
else:
|
|
|
parents = cl.parentrevs(r)
|
|
|
for p in parents:
|
|
|
if p < 0:
|
|
|
continue
|
|
|
if p not in side:
|
|
|
# first time we see p; add it to visit
|
|
|
side[p] = side[r]
|
|
|
if side[p]:
|
|
|
interesting += 1
|
|
|
heapq.heappush(visit, -p)
|
|
|
elif side[p] and side[p] != side[r]:
|
|
|
# p was interesting but now we know better
|
|
|
side[p] = 0
|
|
|
interesting -= 1
|
|
|
hascommonancestor = True
|
|
|
if side[r]:
|
|
|
limit = r # lowest rev visited
|
|
|
interesting -= 1
|
|
|
|
|
|
if not hascommonancestor:
|
|
|
return None
|
|
|
|
|
|
# Consider the following flow (see test-commit-amend.t under issue4405):
|
|
|
# 1/ File 'a0' committed
|
|
|
# 2/ File renamed from 'a0' to 'a1' in a new commit (call it 'a1')
|
|
|
# 3/ Move back to first commit
|
|
|
# 4/ Create a new commit via revert to contents of 'a1' (call it 'a1-amend')
|
|
|
# 5/ Rename file from 'a1' to 'a2' and commit --amend 'a1-msg'
|
|
|
#
|
|
|
# During the amend in step five, we will be in this state:
|
|
|
#
|
|
|
# @ 3 temporary amend commit for a1-amend
|
|
|
# |
|
|
|
# o 2 a1-amend
|
|
|
# |
|
|
|
# | o 1 a1
|
|
|
# |/
|
|
|
# o 0 a0
|
|
|
#
|
|
|
# When _findlimit is called, a and b are revs 3 and 0, so limit will be 2,
|
|
|
# yet the filelog has the copy information in rev 1 and we will not look
|
|
|
# back far enough unless we also look at the a and b as candidates.
|
|
|
# This only occurs when a is a descendent of b or visa-versa.
|
|
|
return min(limit, a, b)
|
|
|
|
|
|
def _chain(src, dst, a, b):
|
|
|
'''chain two sets of copies a->b'''
|
|
|
t = a.copy()
|
|
|
for k, v in b.iteritems():
|
|
|
if v in t:
|
|
|
# found a chain
|
|
|
if t[v] != k:
|
|
|
# file wasn't renamed back to itself
|
|
|
t[k] = t[v]
|
|
|
if v not in dst:
|
|
|
# chain was a rename, not a copy
|
|
|
del t[v]
|
|
|
if v in src:
|
|
|
# file is a copy of an existing file
|
|
|
t[k] = v
|
|
|
|
|
|
# remove criss-crossed copies
|
|
|
for k, v in t.items():
|
|
|
if k in src and v in dst:
|
|
|
del t[k]
|
|
|
|
|
|
return t
|
|
|
|
|
|
def _tracefile(fctx, am, limit=-1):
|
|
|
'''return file context that is the ancestor of fctx present in ancestor
|
|
|
manifest am, stopping after the first ancestor lower than limit'''
|
|
|
|
|
|
for f in fctx.ancestors():
|
|
|
if am.get(f.path(), None) == f.filenode():
|
|
|
return f
|
|
|
if limit >= 0 and f.linkrev() < limit and f.rev() < limit:
|
|
|
return None
|
|
|
|
|
|
def _dirstatecopies(d):
|
|
|
ds = d._repo.dirstate
|
|
|
c = ds.copies().copy()
|
|
|
for k in c.keys():
|
|
|
if ds[k] not in 'anm':
|
|
|
del c[k]
|
|
|
return c
|
|
|
|
|
|
def _computeforwardmissing(a, b, match=None):
|
|
|
"""Computes which files are in b but not a.
|
|
|
This is its own function so extensions can easily wrap this call to see what
|
|
|
files _forwardcopies is about to process.
|
|
|
"""
|
|
|
ma = a.manifest()
|
|
|
mb = b.manifest()
|
|
|
if match:
|
|
|
ma = ma.matches(match)
|
|
|
mb = mb.matches(match)
|
|
|
return mb.filesnotin(ma)
|
|
|
|
|
|
def _forwardcopies(a, b, match=None):
|
|
|
'''find {dst@b: src@a} copy mapping where a is an ancestor of b'''
|
|
|
|
|
|
# check for working copy
|
|
|
w = None
|
|
|
if b.rev() is None:
|
|
|
w = b
|
|
|
b = w.p1()
|
|
|
if a == b:
|
|
|
# short-circuit to avoid issues with merge states
|
|
|
return _dirstatecopies(w)
|
|
|
|
|
|
# files might have to be traced back to the fctx parent of the last
|
|
|
# one-side-only changeset, but not further back than that
|
|
|
limit = _findlimit(a._repo, a.rev(), b.rev())
|
|
|
if limit is None:
|
|
|
limit = -1
|
|
|
am = a.manifest()
|
|
|
|
|
|
# find where new files came from
|
|
|
# we currently don't try to find where old files went, too expensive
|
|
|
# this means we can miss a case like 'hg rm b; hg cp a b'
|
|
|
cm = {}
|
|
|
|
|
|
# Computing the forward missing is quite expensive on large manifests, since
|
|
|
# it compares the entire manifests. We can optimize it in the common use
|
|
|
# case of computing what copies are in a commit versus its parent (like
|
|
|
# during a rebase or histedit). Note, we exclude merge commits from this
|
|
|
# optimization, since the ctx.files() for a merge commit is not correct for
|
|
|
# this comparison.
|
|
|
forwardmissingmatch = match
|
|
|
if not match and b.p1() == a and b.p2().node() == node.nullid:
|
|
|
forwardmissingmatch = scmutil.matchfiles(a._repo, b.files())
|
|
|
missing = _computeforwardmissing(a, b, match=forwardmissingmatch)
|
|
|
|
|
|
ancestrycontext = a._repo.changelog.ancestors([b.rev()], inclusive=True)
|
|
|
for f in missing:
|
|
|
fctx = b[f]
|
|
|
fctx._ancestrycontext = ancestrycontext
|
|
|
ofctx = _tracefile(fctx, am, limit)
|
|
|
if ofctx:
|
|
|
cm[f] = ofctx.path()
|
|
|
|
|
|
# combine copies from dirstate if necessary
|
|
|
if w is not None:
|
|
|
cm = _chain(a, w, cm, _dirstatecopies(w))
|
|
|
|
|
|
return cm
|
|
|
|
|
|
def _backwardrenames(a, b):
|
|
|
if a._repo.ui.configbool('experimental', 'disablecopytrace'):
|
|
|
return {}
|
|
|
|
|
|
# Even though we're not taking copies into account, 1:n rename situations
|
|
|
# can still exist (e.g. hg cp a b; hg mv a c). In those cases we
|
|
|
# arbitrarily pick one of the renames.
|
|
|
f = _forwardcopies(b, a)
|
|
|
r = {}
|
|
|
for k, v in sorted(f.iteritems()):
|
|
|
# remove copies
|
|
|
if v in a:
|
|
|
continue
|
|
|
r[v] = k
|
|
|
return r
|
|
|
|
|
|
def pathcopies(x, y, match=None):
|
|
|
'''find {dst@y: src@x} copy mapping for directed compare'''
|
|
|
if x == y or not x or not y:
|
|
|
return {}
|
|
|
a = y.ancestor(x)
|
|
|
if a == x:
|
|
|
return _forwardcopies(x, y, match=match)
|
|
|
if a == y:
|
|
|
return _backwardrenames(x, y)
|
|
|
return _chain(x, y, _backwardrenames(x, a),
|
|
|
_forwardcopies(a, y, match=match))
|
|
|
|
|
|
def _computenonoverlap(repo, c1, c2, addedinm1, addedinm2, baselabel=''):
|
|
|
"""Computes, based on addedinm1 and addedinm2, the files exclusive to c1
|
|
|
and c2. This is its own function so extensions can easily wrap this call
|
|
|
to see what files mergecopies is about to process.
|
|
|
|
|
|
Even though c1 and c2 are not used in this function, they are useful in
|
|
|
other extensions for being able to read the file nodes of the changed files.
|
|
|
|
|
|
"baselabel" can be passed to help distinguish the multiple computations
|
|
|
done in the graft case.
|
|
|
"""
|
|
|
u1 = sorted(addedinm1 - addedinm2)
|
|
|
u2 = sorted(addedinm2 - addedinm1)
|
|
|
|
|
|
header = " unmatched files in %s"
|
|
|
if baselabel:
|
|
|
header += ' (from %s)' % baselabel
|
|
|
if u1:
|
|
|
repo.ui.debug("%s:\n %s\n" % (header % 'local', "\n ".join(u1)))
|
|
|
if u2:
|
|
|
repo.ui.debug("%s:\n %s\n" % (header % 'other', "\n ".join(u2)))
|
|
|
return u1, u2
|
|
|
|
|
|
def _makegetfctx(ctx):
|
|
|
"""return a 'getfctx' function suitable for _checkcopies usage
|
|
|
|
|
|
We have to re-setup the function building 'filectx' for each
|
|
|
'_checkcopies' to ensure the linkrev adjustment is properly setup for
|
|
|
each. Linkrev adjustment is important to avoid bug in rename
|
|
|
detection. Moreover, having a proper '_ancestrycontext' setup ensures
|
|
|
the performance impact of this adjustment is kept limited. Without it,
|
|
|
each file could do a full dag traversal making the time complexity of
|
|
|
the operation explode (see issue4537).
|
|
|
|
|
|
This function exists here mostly to limit the impact on stable. Feel
|
|
|
free to refactor on default.
|
|
|
"""
|
|
|
rev = ctx.rev()
|
|
|
repo = ctx._repo
|
|
|
ac = getattr(ctx, '_ancestrycontext', None)
|
|
|
if ac is None:
|
|
|
revs = [rev]
|
|
|
if rev is None:
|
|
|
revs = [p.rev() for p in ctx.parents()]
|
|
|
ac = repo.changelog.ancestors(revs, inclusive=True)
|
|
|
ctx._ancestrycontext = ac
|
|
|
def makectx(f, n):
|
|
|
if n in node.wdirnodes: # in a working context?
|
|
|
if ctx.rev() is None:
|
|
|
return ctx.filectx(f)
|
|
|
return repo[None][f]
|
|
|
fctx = repo.filectx(f, fileid=n)
|
|
|
# setup only needed for filectx not create from a changectx
|
|
|
fctx._ancestrycontext = ac
|
|
|
fctx._descendantrev = rev
|
|
|
return fctx
|
|
|
return util.lrucachefunc(makectx)
|
|
|
|
|
|
def _combinecopies(copyfrom, copyto, finalcopy, diverge, incompletediverge):
|
|
|
"""combine partial copy paths"""
|
|
|
remainder = {}
|
|
|
for f in copyfrom:
|
|
|
if f in copyto:
|
|
|
finalcopy[copyto[f]] = copyfrom[f]
|
|
|
del copyto[f]
|
|
|
for f in incompletediverge:
|
|
|
assert f not in diverge
|
|
|
ic = incompletediverge[f]
|
|
|
if ic[0] in copyto:
|
|
|
diverge[f] = [copyto[ic[0]], ic[1]]
|
|
|
else:
|
|
|
remainder[f] = ic
|
|
|
return remainder
|
|
|
|
|
|
def mergecopies(repo, c1, c2, base):
|
|
|
"""
|
|
|
Find moves and copies between context c1 and c2 that are relevant
|
|
|
for merging. 'base' will be used as the merge base.
|
|
|
|
|
|
Returns five dicts: "copy", "movewithdir", "diverge", "renamedelete" and
|
|
|
"dirmove".
|
|
|
|
|
|
"copy" is a mapping from destination name -> source name,
|
|
|
where source is in c1 and destination is in c2 or vice-versa.
|
|
|
|
|
|
"movewithdir" is a mapping from source name -> destination name,
|
|
|
where the file at source present in one context but not the other
|
|
|
needs to be moved to destination by the merge process, because the
|
|
|
other context moved the directory it is in.
|
|
|
|
|
|
"diverge" is a mapping of source name -> list of destination names
|
|
|
for divergent renames.
|
|
|
|
|
|
"renamedelete" is a mapping of source name -> list of destination
|
|
|
names for files deleted in c1 that were renamed in c2 or vice-versa.
|
|
|
|
|
|
"dirmove" is a mapping of detected source dir -> destination dir renames.
|
|
|
This is needed for handling changes to new files previously grafted into
|
|
|
renamed directories.
|
|
|
"""
|
|
|
# avoid silly behavior for update from empty dir
|
|
|
if not c1 or not c2 or c1 == c2:
|
|
|
return {}, {}, {}, {}, {}
|
|
|
|
|
|
# avoid silly behavior for parent -> working dir
|
|
|
if c2.node() is None and c1.node() == repo.dirstate.p1():
|
|
|
return repo.dirstate.copies(), {}, {}, {}, {}
|
|
|
|
|
|
# Copy trace disabling is explicitly below the node == p1 logic above
|
|
|
# because the logic above is required for a simple copy to be kept across a
|
|
|
# rebase.
|
|
|
if repo.ui.configbool('experimental', 'disablecopytrace'):
|
|
|
return {}, {}, {}, {}, {}
|
|
|
|
|
|
# In certain scenarios (e.g. graft, update or rebase), base can be
|
|
|
# overridden We still need to know a real common ancestor in this case We
|
|
|
# can't just compute _c1.ancestor(_c2) and compare it to ca, because there
|
|
|
# can be multiple common ancestors, e.g. in case of bidmerge. Because our
|
|
|
# caller may not know if the revision passed in lieu of the CA is a genuine
|
|
|
# common ancestor or not without explicitly checking it, it's better to
|
|
|
# determine that here.
|
|
|
#
|
|
|
# base.descendant(wc) and base.descendant(base) are False, work around that
|
|
|
_c1 = c1.p1() if c1.rev() is None else c1
|
|
|
_c2 = c2.p1() if c2.rev() is None else c2
|
|
|
# an endpoint is "dirty" if it isn't a descendant of the merge base
|
|
|
# if we have a dirty endpoint, we need to trigger graft logic, and also
|
|
|
# keep track of which endpoint is dirty
|
|
|
dirtyc1 = not (base == _c1 or base.descendant(_c1))
|
|
|
dirtyc2 = not (base== _c2 or base.descendant(_c2))
|
|
|
graft = dirtyc1 or dirtyc2
|
|
|
tca = base
|
|
|
if graft:
|
|
|
tca = _c1.ancestor(_c2)
|
|
|
|
|
|
limit = _findlimit(repo, c1.rev(), c2.rev())
|
|
|
if limit is None:
|
|
|
# no common ancestor, no copies
|
|
|
return {}, {}, {}, {}, {}
|
|
|
repo.ui.debug(" searching for copies back to rev %d\n" % limit)
|
|
|
|
|
|
m1 = c1.manifest()
|
|
|
m2 = c2.manifest()
|
|
|
mb = base.manifest()
|
|
|
|
|
|
# gather data from _checkcopies:
|
|
|
# - diverge = record all diverges in this dict
|
|
|
# - copy = record all non-divergent copies in this dict
|
|
|
# - fullcopy = record all copies in this dict
|
|
|
# - incomplete = record non-divergent partial copies here
|
|
|
# - incompletediverge = record divergent partial copies here
|
|
|
diverge = {} # divergence data is shared
|
|
|
incompletediverge = {}
|
|
|
data1 = {'copy': {},
|
|
|
'fullcopy': {},
|
|
|
'incomplete': {},
|
|
|
'diverge': diverge,
|
|
|
'incompletediverge': incompletediverge,
|
|
|
}
|
|
|
data2 = {'copy': {},
|
|
|
'fullcopy': {},
|
|
|
'incomplete': {},
|
|
|
'diverge': diverge,
|
|
|
'incompletediverge': incompletediverge,
|
|
|
}
|
|
|
|
|
|
# find interesting file sets from manifests
|
|
|
addedinm1 = m1.filesnotin(mb)
|
|
|
addedinm2 = m2.filesnotin(mb)
|
|
|
bothnew = sorted(addedinm1 & addedinm2)
|
|
|
if tca == base:
|
|
|
# unmatched file from base
|
|
|
u1r, u2r = _computenonoverlap(repo, c1, c2, addedinm1, addedinm2)
|
|
|
u1u, u2u = u1r, u2r
|
|
|
else:
|
|
|
# unmatched file from base (DAG rotation in the graft case)
|
|
|
u1r, u2r = _computenonoverlap(repo, c1, c2, addedinm1, addedinm2,
|
|
|
baselabel='base')
|
|
|
# unmatched file from topological common ancestors (no DAG rotation)
|
|
|
# need to recompute this for directory move handling when grafting
|
|
|
mta = tca.manifest()
|
|
|
u1u, u2u = _computenonoverlap(repo, c1, c2, m1.filesnotin(mta),
|
|
|
m2.filesnotin(mta),
|
|
|
baselabel='topological common ancestor')
|
|
|
|
|
|
for f in u1u:
|
|
|
_checkcopies(c1, f, m1, m2, base, tca, dirtyc1, limit, data1)
|
|
|
|
|
|
for f in u2u:
|
|
|
_checkcopies(c2, f, m2, m1, base, tca, dirtyc2, limit, data2)
|
|
|
|
|
|
copy = dict(data1['copy'].items() + data2['copy'].items())
|
|
|
fullcopy = dict(data1['fullcopy'].items() + data2['fullcopy'].items())
|
|
|
|
|
|
if dirtyc1:
|
|
|
_combinecopies(data2['incomplete'], data1['incomplete'], copy, diverge,
|
|
|
incompletediverge)
|
|
|
else:
|
|
|
_combinecopies(data1['incomplete'], data2['incomplete'], copy, diverge,
|
|
|
incompletediverge)
|
|
|
|
|
|
renamedelete = {}
|
|
|
renamedeleteset = set()
|
|
|
divergeset = set()
|
|
|
for of, fl in diverge.items():
|
|
|
if len(fl) == 1 or of in c1 or of in c2:
|
|
|
del diverge[of] # not actually divergent, or not a rename
|
|
|
if of not in c1 and of not in c2:
|
|
|
# renamed on one side, deleted on the other side, but filter
|
|
|
# out files that have been renamed and then deleted
|
|
|
renamedelete[of] = [f for f in fl if f in c1 or f in c2]
|
|
|
renamedeleteset.update(fl) # reverse map for below
|
|
|
else:
|
|
|
divergeset.update(fl) # reverse map for below
|
|
|
|
|
|
if bothnew:
|
|
|
repo.ui.debug(" unmatched files new in both:\n %s\n"
|
|
|
% "\n ".join(bothnew))
|
|
|
bothdiverge = {}
|
|
|
bothincompletediverge = {}
|
|
|
remainder = {}
|
|
|
both1 = {'copy': {},
|
|
|
'fullcopy': {},
|
|
|
'incomplete': {},
|
|
|
'diverge': bothdiverge,
|
|
|
'incompletediverge': bothincompletediverge
|
|
|
}
|
|
|
both2 = {'copy': {},
|
|
|
'fullcopy': {},
|
|
|
'incomplete': {},
|
|
|
'diverge': bothdiverge,
|
|
|
'incompletediverge': bothincompletediverge
|
|
|
}
|
|
|
for f in bothnew:
|
|
|
_checkcopies(c1, f, m1, m2, base, tca, dirtyc1, limit, both1)
|
|
|
_checkcopies(c2, f, m2, m1, base, tca, dirtyc2, limit, both2)
|
|
|
if dirtyc1:
|
|
|
# incomplete copies may only be found on the "dirty" side for bothnew
|
|
|
assert not both2['incomplete']
|
|
|
remainder = _combinecopies({}, both1['incomplete'], copy, bothdiverge,
|
|
|
bothincompletediverge)
|
|
|
elif dirtyc2:
|
|
|
assert not both1['incomplete']
|
|
|
remainder = _combinecopies({}, both2['incomplete'], copy, bothdiverge,
|
|
|
bothincompletediverge)
|
|
|
else:
|
|
|
# incomplete copies and divergences can't happen outside grafts
|
|
|
assert not both1['incomplete']
|
|
|
assert not both2['incomplete']
|
|
|
assert not bothincompletediverge
|
|
|
for f in remainder:
|
|
|
assert f not in bothdiverge
|
|
|
ic = remainder[f]
|
|
|
if ic[0] in (m1 if dirtyc1 else m2):
|
|
|
# backed-out rename on one side, but watch out for deleted files
|
|
|
bothdiverge[f] = ic
|
|
|
for of, fl in bothdiverge.items():
|
|
|
if len(fl) == 2 and fl[0] == fl[1]:
|
|
|
copy[fl[0]] = of # not actually divergent, just matching renames
|
|
|
|
|
|
if fullcopy and repo.ui.debugflag:
|
|
|
repo.ui.debug(" all copies found (* = to merge, ! = divergent, "
|
|
|
"% = renamed and deleted):\n")
|
|
|
for f in sorted(fullcopy):
|
|
|
note = ""
|
|
|
if f in copy:
|
|
|
note += "*"
|
|
|
if f in divergeset:
|
|
|
note += "!"
|
|
|
if f in renamedeleteset:
|
|
|
note += "%"
|
|
|
repo.ui.debug(" src: '%s' -> dst: '%s' %s\n" % (fullcopy[f], f,
|
|
|
note))
|
|
|
del divergeset
|
|
|
|
|
|
if not fullcopy:
|
|
|
return copy, {}, diverge, renamedelete, {}
|
|
|
|
|
|
repo.ui.debug(" checking for directory renames\n")
|
|
|
|
|
|
# generate a directory move map
|
|
|
d1, d2 = c1.dirs(), c2.dirs()
|
|
|
# Hack for adding '', which is not otherwise added, to d1 and d2
|
|
|
d1.addpath('/')
|
|
|
d2.addpath('/')
|
|
|
invalid = set()
|
|
|
dirmove = {}
|
|
|
|
|
|
# examine each file copy for a potential directory move, which is
|
|
|
# when all the files in a directory are moved to a new directory
|
|
|
for dst, src in fullcopy.iteritems():
|
|
|
dsrc, ddst = pathutil.dirname(src), pathutil.dirname(dst)
|
|
|
if dsrc in invalid:
|
|
|
# already seen to be uninteresting
|
|
|
continue
|
|
|
elif dsrc in d1 and ddst in d1:
|
|
|
# directory wasn't entirely moved locally
|
|
|
invalid.add(dsrc + "/")
|
|
|
elif dsrc in d2 and ddst in d2:
|
|
|
# directory wasn't entirely moved remotely
|
|
|
invalid.add(dsrc + "/")
|
|
|
elif dsrc + "/" in dirmove and dirmove[dsrc + "/"] != ddst + "/":
|
|
|
# files from the same directory moved to two different places
|
|
|
invalid.add(dsrc + "/")
|
|
|
else:
|
|
|
# looks good so far
|
|
|
dirmove[dsrc + "/"] = ddst + "/"
|
|
|
|
|
|
for i in invalid:
|
|
|
if i in dirmove:
|
|
|
del dirmove[i]
|
|
|
del d1, d2, invalid
|
|
|
|
|
|
if not dirmove:
|
|
|
return copy, {}, diverge, renamedelete, {}
|
|
|
|
|
|
for d in dirmove:
|
|
|
repo.ui.debug(" discovered dir src: '%s' -> dst: '%s'\n" %
|
|
|
(d, dirmove[d]))
|
|
|
|
|
|
movewithdir = {}
|
|
|
# check unaccounted nonoverlapping files against directory moves
|
|
|
for f in u1r + u2r:
|
|
|
if f not in fullcopy:
|
|
|
for d in dirmove:
|
|
|
if f.startswith(d):
|
|
|
# new file added in a directory that was moved, move it
|
|
|
df = dirmove[d] + f[len(d):]
|
|
|
if df not in copy:
|
|
|
movewithdir[f] = df
|
|
|
repo.ui.debug((" pending file src: '%s' -> "
|
|
|
"dst: '%s'\n") % (f, df))
|
|
|
break
|
|
|
|
|
|
return copy, movewithdir, diverge, renamedelete, dirmove
|
|
|
|
|
|
def _related(f1, f2, limit):
|
|
|
"""return True if f1 and f2 filectx have a common ancestor
|
|
|
|
|
|
Walk back to common ancestor to see if the two files originate
|
|
|
from the same file. Since workingfilectx's rev() is None it messes
|
|
|
up the integer comparison logic, hence the pre-step check for
|
|
|
None (f1 and f2 can only be workingfilectx's initially).
|
|
|
"""
|
|
|
|
|
|
if f1 == f2:
|
|
|
return f1 # a match
|
|
|
|
|
|
g1, g2 = f1.ancestors(), f2.ancestors()
|
|
|
try:
|
|
|
f1r, f2r = f1.linkrev(), f2.linkrev()
|
|
|
|
|
|
if f1r is None:
|
|
|
f1 = next(g1)
|
|
|
if f2r is None:
|
|
|
f2 = next(g2)
|
|
|
|
|
|
while True:
|
|
|
f1r, f2r = f1.linkrev(), f2.linkrev()
|
|
|
if f1r > f2r:
|
|
|
f1 = next(g1)
|
|
|
elif f2r > f1r:
|
|
|
f2 = next(g2)
|
|
|
elif f1 == f2:
|
|
|
return f1 # a match
|
|
|
elif f1r == f2r or f1r < limit or f2r < limit:
|
|
|
return False # copy no longer relevant
|
|
|
except StopIteration:
|
|
|
return False
|
|
|
|
|
|
def _checkcopies(ctx, f, m1, m2, base, tca, remotebase, limit, data):
|
|
|
"""
|
|
|
check possible copies of f from m1 to m2
|
|
|
|
|
|
ctx = starting context for f in m1
|
|
|
f = the filename to check (as in m1)
|
|
|
m1 = the source manifest
|
|
|
m2 = the destination manifest
|
|
|
base = the changectx used as a merge base
|
|
|
tca = topological common ancestor for graft-like scenarios
|
|
|
remotebase = True if base is outside tca::ctx, False otherwise
|
|
|
limit = the rev number to not search beyond
|
|
|
data = dictionary of dictionary to store copy data. (see mergecopies)
|
|
|
|
|
|
note: limit is only an optimization, and there is no guarantee that
|
|
|
irrelevant revisions will not be limited
|
|
|
there is no easy way to make this algorithm stop in a guaranteed way
|
|
|
once it "goes behind a certain revision".
|
|
|
"""
|
|
|
|
|
|
mb = base.manifest()
|
|
|
mta = tca.manifest()
|
|
|
# Might be true if this call is about finding backward renames,
|
|
|
# This happens in the case of grafts because the DAG is then rotated.
|
|
|
# If the file exists in both the base and the source, we are not looking
|
|
|
# for a rename on the source side, but on the part of the DAG that is
|
|
|
# traversed backwards.
|
|
|
#
|
|
|
# In the case there is both backward and forward renames (before and after
|
|
|
# the base) this is more complicated as we must detect a divergence.
|
|
|
# We use 'backwards = False' in that case.
|
|
|
backwards = not remotebase and base != tca and f in mb
|
|
|
getfctx = _makegetfctx(ctx)
|
|
|
|
|
|
if m1[f] == mb.get(f) and not remotebase:
|
|
|
# Nothing to merge
|
|
|
return
|
|
|
|
|
|
of = None
|
|
|
seen = set([f])
|
|
|
for oc in getfctx(f, m1[f]).ancestors():
|
|
|
ocr = oc.linkrev()
|
|
|
of = oc.path()
|
|
|
if of in seen:
|
|
|
# check limit late - grab last rename before
|
|
|
if ocr < limit:
|
|
|
break
|
|
|
continue
|
|
|
seen.add(of)
|
|
|
|
|
|
# remember for dir rename detection
|
|
|
if backwards:
|
|
|
data['fullcopy'][of] = f # grafting backwards through renames
|
|
|
else:
|
|
|
data['fullcopy'][f] = of
|
|
|
if of not in m2:
|
|
|
continue # no match, keep looking
|
|
|
if m2[of] == mb.get(of):
|
|
|
return # no merge needed, quit early
|
|
|
c2 = getfctx(of, m2[of])
|
|
|
# c2 might be a plain new file on added on destination side that is
|
|
|
# unrelated to the droids we are looking for.
|
|
|
cr = _related(oc, c2, tca.rev())
|
|
|
if cr and (of == f or of == c2.path()): # non-divergent
|
|
|
if backwards:
|
|
|
data['copy'][of] = f
|
|
|
elif of in mb:
|
|
|
data['copy'][f] = of
|
|
|
elif remotebase: # special case: a <- b <- a -> b "ping-pong" rename
|
|
|
data['copy'][of] = f
|
|
|
del data['fullcopy'][f]
|
|
|
data['fullcopy'][of] = f
|
|
|
else: # divergence w.r.t. graft CA on one side of topological CA
|
|
|
for sf in seen:
|
|
|
if sf in mb:
|
|
|
assert sf not in data['diverge']
|
|
|
data['diverge'][sf] = [f, of]
|
|
|
break
|
|
|
return
|
|
|
|
|
|
if of in mta:
|
|
|
if backwards or remotebase:
|
|
|
data['incomplete'][of] = f
|
|
|
else:
|
|
|
for sf in seen:
|
|
|
if sf in mb:
|
|
|
if tca == base:
|
|
|
data['diverge'].setdefault(sf, []).append(f)
|
|
|
else:
|
|
|
data['incompletediverge'][sf] = [of, f]
|
|
|
return
|
|
|
|
|
|
def duplicatecopies(repo, rev, fromrev, skiprev=None):
|
|
|
'''reproduce copies from fromrev to rev in the dirstate
|
|
|
|
|
|
If skiprev is specified, it's a revision that should be used to
|
|
|
filter copy records. Any copies that occur between fromrev and
|
|
|
skiprev will not be duplicated, even if they appear in the set of
|
|
|
copies between fromrev and rev.
|
|
|
'''
|
|
|
exclude = {}
|
|
|
if (skiprev is not None and
|
|
|
not repo.ui.configbool('experimental', 'disablecopytrace')):
|
|
|
# disablecopytrace skips this line, but not the entire function because
|
|
|
# the line below is O(size of the repo) during a rebase, while the rest
|
|
|
# of the function is much faster (and is required for carrying copy
|
|
|
# metadata across the rebase anyway).
|
|
|
exclude = pathcopies(repo[fromrev], repo[skiprev])
|
|
|
for dst, src in pathcopies(repo[fromrev], repo[rev]).iteritems():
|
|
|
# copies.pathcopies returns backward renames, so dst might not
|
|
|
# actually be in the dirstate
|
|
|
if dst in exclude:
|
|
|
continue
|
|
|
if repo.dirstate[dst] in "nma":
|
|
|
repo.dirstate.copy(src, dst)
|
|
|
|
