mercurial/copies.py
author Pierre-Yves David <pierre-yves.david@ens-lyon.org>
Thu, 13 Oct 2016 01:26:33 +0200
changeset 30185 e2bfe2d52d7a
parent 30184 7321c6b0c9fd
child 30186 f7ed5af31242
permissions -rw-r--r--
copies: move variable document from checkcopies to mergecopies It appears that 'mergecopies' is the function consuming these data so we move the documentation there.
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# copies.py - copy detection for Mercurial
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#
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# Copyright 2008 Matt Mackall <mpm@selenic.com>
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#
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# This software may be used and distributed according to the terms of the
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# GNU General Public License version 2 or any later version.
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from __future__ import absolute_import
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import heapq
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from . import (
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    node,
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    pathutil,
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    scmutil,
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    util,
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)
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def _findlimit(repo, a, b):
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    """
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    Find the last revision that needs to be checked to ensure that a full
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    transitive closure for file copies can be properly calculated.
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    Generally, this means finding the earliest revision number that's an
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    ancestor of a or b but not both, except when a or b is a direct descendent
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    of the other, in which case we can return the minimum revnum of a and b.
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    None if no such revision exists.
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    """
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    # basic idea:
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    # - mark a and b with different sides
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    # - if a parent's children are all on the same side, the parent is
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    #   on that side, otherwise it is on no side
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    # - walk the graph in topological order with the help of a heap;
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    #   - add unseen parents to side map
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    #   - clear side of any parent that has children on different sides
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    #   - track number of interesting revs that might still be on a side
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    #   - track the lowest interesting rev seen
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    #   - quit when interesting revs is zero
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    cl = repo.changelog
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    working = len(cl) # pseudo rev for the working directory
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    if a is None:
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        a = working
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    if b is None:
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        b = working
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    side = {a: -1, b: 1}
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    visit = [-a, -b]
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    heapq.heapify(visit)
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    interesting = len(visit)
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    hascommonancestor = False
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    limit = working
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    while interesting:
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        r = -heapq.heappop(visit)
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        if r == working:
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            parents = [cl.rev(p) for p in repo.dirstate.parents()]
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        else:
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            parents = cl.parentrevs(r)
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        for p in parents:
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            if p < 0:
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                continue
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            if p not in side:
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                # first time we see p; add it to visit
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                side[p] = side[r]
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                if side[p]:
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                    interesting += 1
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                heapq.heappush(visit, -p)
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            elif side[p] and side[p] != side[r]:
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                # p was interesting but now we know better
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                side[p] = 0
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                interesting -= 1
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                hascommonancestor = True
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        if side[r]:
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            limit = r # lowest rev visited
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            interesting -= 1
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    if not hascommonancestor:
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        return None
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    # Consider the following flow (see test-commit-amend.t under issue4405):
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    # 1/ File 'a0' committed
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    # 2/ File renamed from 'a0' to 'a1' in a new commit (call it 'a1')
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    # 3/ Move back to first commit
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    # 4/ Create a new commit via revert to contents of 'a1' (call it 'a1-amend')
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    # 5/ Rename file from 'a1' to 'a2' and commit --amend 'a1-msg'
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    #
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    # During the amend in step five, we will be in this state:
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    #
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    # @  3 temporary amend commit for a1-amend
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    # |
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    # o  2 a1-amend
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    # |
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    # | o  1 a1
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    # |/
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    # o  0 a0
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    #
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    # When _findlimit is called, a and b are revs 3 and 0, so limit will be 2,
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    # yet the filelog has the copy information in rev 1 and we will not look
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    # back far enough unless we also look at the a and b as candidates.
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    # This only occurs when a is a descendent of b or visa-versa.
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    return min(limit, a, b)
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def _chain(src, dst, a, b):
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    '''chain two sets of copies a->b'''
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    t = a.copy()
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    for k, v in b.iteritems():
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        if v in t:
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            # found a chain
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            if t[v] != k:
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                # file wasn't renamed back to itself
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                t[k] = t[v]
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            if v not in dst:
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                # chain was a rename, not a copy
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                del t[v]
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        if v in src:
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            # file is a copy of an existing file
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            t[k] = v
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    # remove criss-crossed copies
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    for k, v in t.items():
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        if k in src and v in dst:
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            del t[k]
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    return t
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def _tracefile(fctx, am, limit=-1):
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    '''return file context that is the ancestor of fctx present in ancestor
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    manifest am, stopping after the first ancestor lower than limit'''
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    for f in fctx.ancestors():
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        if am.get(f.path(), None) == f.filenode():
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            return f
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        if limit >= 0 and f.linkrev() < limit and f.rev() < limit:
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            return None
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def _dirstatecopies(d):
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    ds = d._repo.dirstate
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    c = ds.copies().copy()
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    for k in c.keys():
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        if ds[k] not in 'anm':
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            del c[k]
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    return c
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def _computeforwardmissing(a, b, match=None):
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    """Computes which files are in b but not a.
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    This is its own function so extensions can easily wrap this call to see what
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    files _forwardcopies is about to process.
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    """
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    ma = a.manifest()
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    mb = b.manifest()
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    if match:
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        ma = ma.matches(match)
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        mb = mb.matches(match)
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    return mb.filesnotin(ma)
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def _forwardcopies(a, b, match=None):
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    '''find {dst@b: src@a} copy mapping where a is an ancestor of b'''
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    # check for working copy
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    w = None
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    if b.rev() is None:
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        w = b
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        b = w.p1()
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        if a == b:
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            # short-circuit to avoid issues with merge states
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            return _dirstatecopies(w)
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    # files might have to be traced back to the fctx parent of the last
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    # one-side-only changeset, but not further back than that
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    limit = _findlimit(a._repo, a.rev(), b.rev())
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    if limit is None:
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        limit = -1
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    am = a.manifest()
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    # find where new files came from
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    # we currently don't try to find where old files went, too expensive
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    # this means we can miss a case like 'hg rm b; hg cp a b'
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    cm = {}
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    # Computing the forward missing is quite expensive on large manifests, since
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    # it compares the entire manifests. We can optimize it in the common use
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    # case of computing what copies are in a commit versus its parent (like
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    # during a rebase or histedit). Note, we exclude merge commits from this
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    # optimization, since the ctx.files() for a merge commit is not correct for
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    # this comparison.
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    forwardmissingmatch = match
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    if not match and b.p1() == a and b.p2().node() == node.nullid:
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        forwardmissingmatch = scmutil.matchfiles(a._repo, b.files())
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    missing = _computeforwardmissing(a, b, match=forwardmissingmatch)
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    ancestrycontext = a._repo.changelog.ancestors([b.rev()], inclusive=True)
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    for f in missing:
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        fctx = b[f]
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        fctx._ancestrycontext = ancestrycontext
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        ofctx = _tracefile(fctx, am, limit)
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        if ofctx:
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            cm[f] = ofctx.path()
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    # combine copies from dirstate if necessary
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    if w is not None:
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        cm = _chain(a, w, cm, _dirstatecopies(w))
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    return cm
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def _backwardrenames(a, b):
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    if a._repo.ui.configbool('experimental', 'disablecopytrace'):
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        return {}
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    # Even though we're not taking copies into account, 1:n rename situations
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    # can still exist (e.g. hg cp a b; hg mv a c). In those cases we
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    # arbitrarily pick one of the renames.
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    f = _forwardcopies(b, a)
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    r = {}
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    for k, v in sorted(f.iteritems()):
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        # remove copies
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        if v in a:
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            continue
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        r[v] = k
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    return r
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def pathcopies(x, y, match=None):
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    '''find {dst@y: src@x} copy mapping for directed compare'''
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    if x == y or not x or not y:
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        return {}
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    a = y.ancestor(x)
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    if a == x:
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        return _forwardcopies(x, y, match=match)
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    if a == y:
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        return _backwardrenames(x, y)
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    return _chain(x, y, _backwardrenames(x, a),
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                  _forwardcopies(a, y, match=match))
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   233
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def _computenonoverlap(repo, c1, c2, addedinm1, addedinm2):
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    """Computes, based on addedinm1 and addedinm2, the files exclusive to c1
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    and c2. This is its own function so extensions can easily wrap this call
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    to see what files mergecopies is about to process.
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    Even though c1 and c2 are not used in this function, they are useful in
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    other extensions for being able to read the file nodes of the changed files.
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    """
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    u1 = sorted(addedinm1 - addedinm2)
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    u2 = sorted(addedinm2 - addedinm1)
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    if u1:
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        repo.ui.debug("  unmatched files in local:\n   %s\n"
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                      % "\n   ".join(u1))
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    if u2:
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        repo.ui.debug("  unmatched files in other:\n   %s\n"
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                      % "\n   ".join(u2))
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    return u1, u2
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def _makegetfctx(ctx):
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    """return a 'getfctx' function suitable for _checkcopies usage
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    We have to re-setup the function building 'filectx' for each
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    '_checkcopies' to ensure the linkrev adjustment is properly setup for
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    each. Linkrev adjustment is important to avoid bug in rename
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    detection. Moreover, having a proper '_ancestrycontext' setup ensures
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    the performance impact of this adjustment is kept limited. Without it,
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    each file could do a full dag traversal making the time complexity of
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    the operation explode (see issue4537).
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    This function exists here mostly to limit the impact on stable. Feel
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    free to refactor on default.
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    """
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    rev = ctx.rev()
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    repo = ctx._repo
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    ac = getattr(ctx, '_ancestrycontext', None)
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    if ac is None:
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        revs = [rev]
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        if rev is None:
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            revs = [p.rev() for p in ctx.parents()]
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        ac = repo.changelog.ancestors(revs, inclusive=True)
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        ctx._ancestrycontext = ac
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    def makectx(f, n):
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        if len(n) != 20:  # in a working context?
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            if ctx.rev() is None:
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                return ctx.filectx(f)
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            return repo[None][f]
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        fctx = repo.filectx(f, fileid=n)
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        # setup only needed for filectx not create from a changectx
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        fctx._ancestrycontext = ac
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        fctx._descendantrev = rev
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        return fctx
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    return util.lrucachefunc(makectx)
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def mergecopies(repo, c1, c2, ca):
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    """
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    Find moves and copies between context c1 and c2 that are relevant
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    for merging.
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    Returns four dicts: "copy", "movewithdir", "diverge", and
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    "renamedelete".
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    "copy" is a mapping from destination name -> source name,
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    where source is in c1 and destination is in c2 or vice-versa.
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    "movewithdir" is a mapping from source name -> destination name,
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    where the file at source present in one context but not the other
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    needs to be moved to destination by the merge process, because the
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    other context moved the directory it is in.
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    "diverge" is a mapping of source name -> list of destination names
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    for divergent renames.
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    "renamedelete" is a mapping of source name -> list of destination
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    names for files deleted in c1 that were renamed in c2 or vice-versa.
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    """
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    # avoid silly behavior for update from empty dir
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    if not c1 or not c2 or c1 == c2:
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        return {}, {}, {}, {}
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    # avoid silly behavior for parent -> working dir
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    if c2.node() is None and c1.node() == repo.dirstate.p1():
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        return repo.dirstate.copies(), {}, {}, {}
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    # Copy trace disabling is explicitly below the node == p1 logic above
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    # because the logic above is required for a simple copy to be kept across a
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    # rebase.
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    if repo.ui.configbool('experimental', 'disablecopytrace'):
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        return {}, {}, {}, {}
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    limit = _findlimit(repo, c1.rev(), c2.rev())
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    if limit is None:
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        # no common ancestor, no copies
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        return {}, {}, {}, {}
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    repo.ui.debug("  searching for copies back to rev %d\n" % limit)
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    m1 = c1.manifest()
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    m2 = c2.manifest()
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    ma = ca.manifest()
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    # gather data from _checkcopies:
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    # - diverge = record all diverges in this dict
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    # - copy = record all non-divergent copies in this dict
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    # - fullcopy = record all copies in this dict
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    diverge = {} # divergence data is shared
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    data1 = {'copy': {},
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             'fullcopy': {},
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             'diverge': diverge,
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            }
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    data2 = {'copy': {},
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             'fullcopy': {},
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             'diverge': diverge,
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            }
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    # find interesting file sets from manifests
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    addedinm1 = m1.filesnotin(ma)
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    addedinm2 = m2.filesnotin(ma)
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    u1r, u2r = _computenonoverlap(repo, c1, c2, addedinm1, addedinm2)
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    u1u, u2u = u1r, u2r
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    bothnew = sorted(addedinm1 & addedinm2)
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    for f in u1u:
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        _checkcopies(c1, f, m1, m2, ca, limit, data1)
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    for f in u2u:
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        _checkcopies(c2, f, m2, m1, ca, limit, data2)
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    copy = dict(data1['copy'].items() + data2['copy'].items())
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    fullcopy = dict(data1['fullcopy'].items() + data2['fullcopy'].items())
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   364
    renamedelete = {}
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   365
    renamedeleteset = set()
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   366
    divergeset = set()
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    for of, fl in diverge.items():
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   368
        if len(fl) == 1 or of in c1 or of in c2:
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            del diverge[of] # not actually divergent, or not a rename
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            if of not in c1 and of not in c2:
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                # renamed on one side, deleted on the other side, but filter
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                # out files that have been renamed and then deleted
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                renamedelete[of] = [f for f in fl if f in c1 or f in c2]
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                renamedeleteset.update(fl) # reverse map for below
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        else:
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            divergeset.update(fl) # reverse map for below
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    if bothnew:
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   379
        repo.ui.debug("  unmatched files new in both:\n   %s\n"
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   380
                      % "\n   ".join(bothnew))
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    bothdiverge = {}
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   382
    bothdata = {'copy': {},
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parents: 30183
diff changeset
   383
                'fullcopy': {},
7321c6b0c9fd checkcopies: pass data as a dictionary of dictionaries
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 30183
diff changeset
   384
                'diverge': bothdiverge,
7321c6b0c9fd checkcopies: pass data as a dictionary of dictionaries
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 30183
diff changeset
   385
               }
20641
3db9e798e004 copies: when both sides made the same copy, report it as a copy
Mads Kiilerich <madski@unity3d.com>
parents: 20294
diff changeset
   386
    for f in bothnew:
30184
7321c6b0c9fd checkcopies: pass data as a dictionary of dictionaries
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 30183
diff changeset
   387
        _checkcopies(c1, f, m1, m2, ca, limit, bothdata)
7321c6b0c9fd checkcopies: pass data as a dictionary of dictionaries
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 30183
diff changeset
   388
        _checkcopies(c2, f, m2, m1, ca, limit, bothdata)
20641
3db9e798e004 copies: when both sides made the same copy, report it as a copy
Mads Kiilerich <madski@unity3d.com>
parents: 20294
diff changeset
   389
    for of, fl in bothdiverge.items():
3db9e798e004 copies: when both sides made the same copy, report it as a copy
Mads Kiilerich <madski@unity3d.com>
parents: 20294
diff changeset
   390
        if len(fl) == 2 and fl[0] == fl[1]:
3db9e798e004 copies: when both sides made the same copy, report it as a copy
Mads Kiilerich <madski@unity3d.com>
parents: 20294
diff changeset
   391
            copy[fl[0]] = of # not actually divergent, just matching renames
3db9e798e004 copies: when both sides made the same copy, report it as a copy
Mads Kiilerich <madski@unity3d.com>
parents: 20294
diff changeset
   392
20990
d9e211a658eb copies: guard debug section with ui.debugflag
Mads Kiilerich <madski@unity3d.com>
parents: 20989
diff changeset
   393
    if fullcopy and repo.ui.debugflag:
16795
e9ae770eff1c merge: show renamed on one and deleted on the other side in debug output
Thomas Arendsen Hein <thomas@intevation.de>
parents: 16794
diff changeset
   394
        repo.ui.debug("  all copies found (* = to merge, ! = divergent, "
e9ae770eff1c merge: show renamed on one and deleted on the other side in debug output
Thomas Arendsen Hein <thomas@intevation.de>
parents: 16794
diff changeset
   395
                      "% = renamed and deleted):\n")
18362
5a4f220fbfca copies: report found copies sorted
Mads Kiilerich <mads@kiilerich.com>
parents: 18355
diff changeset
   396
        for f in sorted(fullcopy):
6274
f3f383efbeae copies: move findcopies code to its own module
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
   397
            note = ""
10282
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 10263
diff changeset
   398
            if f in copy:
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 10263
diff changeset
   399
                note += "*"
26317
07ac78ba2e37 copies: rename diverge2 to divergeset for clarity
Matt Mackall <mpm@selenic.com>
parents: 26316
diff changeset
   400
            if f in divergeset:
10282
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 10263
diff changeset
   401
                note += "!"
26658
aabfa0fb7e3e copies: rename renamedelete to renamedeleteset for clarity
Matt Mackall <mpm@selenic.com>
parents: 26657
diff changeset
   402
            if f in renamedeleteset:
16795
e9ae770eff1c merge: show renamed on one and deleted on the other side in debug output
Thomas Arendsen Hein <thomas@intevation.de>
parents: 16794
diff changeset
   403
                note += "%"
18135
a6fe1b9cc68f copies: make debug messages more sensible
Siddharth Agarwal <sid0@fb.com>
parents: 18134
diff changeset
   404
            repo.ui.debug("   src: '%s' -> dst: '%s' %s\n" % (fullcopy[f], f,
a6fe1b9cc68f copies: make debug messages more sensible
Siddharth Agarwal <sid0@fb.com>
parents: 18134
diff changeset
   405
                                                              note))
26317
07ac78ba2e37 copies: rename diverge2 to divergeset for clarity
Matt Mackall <mpm@selenic.com>
parents: 26316
diff changeset
   406
    del divergeset
6274
f3f383efbeae copies: move findcopies code to its own module
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
   407
16169
c12d4aceba79 copies: remove checkdirs options
Matt Mackall <mpm@selenic.com>
parents: 16168
diff changeset
   408
    if not fullcopy:
30183
0106f93ca1d5 checkcopies: move 'movewithdir' initialisation right before its usage
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 30138
diff changeset
   409
        return copy, {}, diverge, renamedelete
6274
f3f383efbeae copies: move findcopies code to its own module
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
   410
9467
4c041f1ee1b4 do not attempt to translate ui.debug output
Martin Geisler <mg@lazybytes.net>
parents: 9102
diff changeset
   411
    repo.ui.debug("  checking for directory renames\n")
6274
f3f383efbeae copies: move findcopies code to its own module
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
   412
f3f383efbeae copies: move findcopies code to its own module
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
   413
    # generate a directory move map
16178
828fe2ca7cbb copies: use ctx.dirs() for directory rename detection
Matt Mackall <mpm@selenic.com>
parents: 16177
diff changeset
   414
    d1, d2 = c1.dirs(), c2.dirs()
25288
947771ad5174 copies: document hack for adding '' to set of dirs
Martin von Zweigbergk <martinvonz@google.com>
parents: 25282
diff changeset
   415
    # Hack for adding '', which is not otherwise added, to d1 and d2
18899
d8ff607ef721 scmutil: use new dirs class in dirstate and context
Bryan O'Sullivan <bryano@fb.com>
parents: 18878
diff changeset
   416
    d1.addpath('/')
d8ff607ef721 scmutil: use new dirs class in dirstate and context
Bryan O'Sullivan <bryano@fb.com>
parents: 18878
diff changeset
   417
    d2.addpath('/')
17055
8b7cd9a998f0 copies: re-include root directory in directory rename detection (issue3511)
Matt Mackall <mpm@selenic.com>
parents: 16795
diff changeset
   418
    invalid = set()
6274
f3f383efbeae copies: move findcopies code to its own module
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
   419
    dirmove = {}
f3f383efbeae copies: move findcopies code to its own module
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
   420
f3f383efbeae copies: move findcopies code to its own module
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
   421
    # examine each file copy for a potential directory move, which is
f3f383efbeae copies: move findcopies code to its own module
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
   422
    # when all the files in a directory are moved to a new directory
7622
4dd7b28003d2 use dict.iteritems() rather than dict.items()
Dirkjan Ochtman <dirkjan@ochtman.nl>
parents: 6762
diff changeset
   423
    for dst, src in fullcopy.iteritems():
25282
0f28815ef066 copies: switch to using pathutil.dirname
Durham Goode <durham@fb.com>
parents: 24782
diff changeset
   424
        dsrc, ddst = pathutil.dirname(src), pathutil.dirname(dst)
6274
f3f383efbeae copies: move findcopies code to its own module
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
   425
        if dsrc in invalid:
f3f383efbeae copies: move findcopies code to its own module
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
   426
            # already seen to be uninteresting
f3f383efbeae copies: move findcopies code to its own module
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
   427
            continue
f3f383efbeae copies: move findcopies code to its own module
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
   428
        elif dsrc in d1 and ddst in d1:
f3f383efbeae copies: move findcopies code to its own module
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
   429
            # directory wasn't entirely moved locally
27876
602add6ad9e5 copies: fix detection of divergent directory renames
Matt Mackall <mpm@selenic.com>
parents: 26781
diff changeset
   430
            invalid.add(dsrc + "/")
6274
f3f383efbeae copies: move findcopies code to its own module
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
   431
        elif dsrc in d2 and ddst in d2:
f3f383efbeae copies: move findcopies code to its own module
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
   432
            # directory wasn't entirely moved remotely
27876
602add6ad9e5 copies: fix detection of divergent directory renames
Matt Mackall <mpm@selenic.com>
parents: 26781
diff changeset
   433
            invalid.add(dsrc + "/")
602add6ad9e5 copies: fix detection of divergent directory renames
Matt Mackall <mpm@selenic.com>
parents: 26781
diff changeset
   434
        elif dsrc + "/" in dirmove and dirmove[dsrc + "/"] != ddst + "/":
6274
f3f383efbeae copies: move findcopies code to its own module
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
   435
            # files from the same directory moved to two different places
27876
602add6ad9e5 copies: fix detection of divergent directory renames
Matt Mackall <mpm@selenic.com>
parents: 26781
diff changeset
   436
            invalid.add(dsrc + "/")
6274
f3f383efbeae copies: move findcopies code to its own module
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
   437
        else:
f3f383efbeae copies: move findcopies code to its own module
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
   438
            # looks good so far
f3f383efbeae copies: move findcopies code to its own module
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
   439
            dirmove[dsrc + "/"] = ddst + "/"
f3f383efbeae copies: move findcopies code to its own module
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
   440
f3f383efbeae copies: move findcopies code to its own module
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
   441
    for i in invalid:
f3f383efbeae copies: move findcopies code to its own module
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
   442
        if i in dirmove:
f3f383efbeae copies: move findcopies code to its own module
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
   443
            del dirmove[i]
f3f383efbeae copies: move findcopies code to its own module
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
   444
    del d1, d2, invalid
f3f383efbeae copies: move findcopies code to its own module
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
   445
f3f383efbeae copies: move findcopies code to its own module
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
   446
    if not dirmove:
30183
0106f93ca1d5 checkcopies: move 'movewithdir' initialisation right before its usage
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 30138
diff changeset
   447
        return copy, {}, diverge, renamedelete
6274
f3f383efbeae copies: move findcopies code to its own module
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
   448
f3f383efbeae copies: move findcopies code to its own module
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
   449
    for d in dirmove:
18135
a6fe1b9cc68f copies: make debug messages more sensible
Siddharth Agarwal <sid0@fb.com>
parents: 18134
diff changeset
   450
        repo.ui.debug("   discovered dir src: '%s' -> dst: '%s'\n" %
a6fe1b9cc68f copies: make debug messages more sensible
Siddharth Agarwal <sid0@fb.com>
parents: 18134
diff changeset
   451
                      (d, dirmove[d]))
6274
f3f383efbeae copies: move findcopies code to its own module
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
   452
30183
0106f93ca1d5 checkcopies: move 'movewithdir' initialisation right before its usage
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 30138
diff changeset
   453
    movewithdir = {}
6274
f3f383efbeae copies: move findcopies code to its own module
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
   454
    # check unaccounted nonoverlapping files against directory moves
30047
d13a7c8bf0a5 copies: split u1/u2 to u1u/u2u and u1r/u2r
Gábor Stefanik <gabor.stefanik@nng.com>
parents: 30046
diff changeset
   455
    for f in u1r + u2r:
6274
f3f383efbeae copies: move findcopies code to its own module
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
   456
        if f not in fullcopy:
f3f383efbeae copies: move findcopies code to its own module
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
   457
            for d in dirmove:
f3f383efbeae copies: move findcopies code to its own module
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
   458
                if f.startswith(d):
f3f383efbeae copies: move findcopies code to its own module
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
   459
                    # new file added in a directory that was moved, move it
6425
2d9328a2f81f copies: skip directory rename checks when not merging
Matt Mackall <mpm@selenic.com>
parents: 6424
diff changeset
   460
                    df = dirmove[d] + f[len(d):]
6426
e2c49ef2dd6e copies: don't double-detect items in the directory copy check
Matt Mackall <mpm@selenic.com>
parents: 6425
diff changeset
   461
                    if df not in copy:
18134
6c35b53cd28b copies: separate moves via directory renames from explicit copies
Siddharth Agarwal <sid0@fb.com>
parents: 17055
diff changeset
   462
                        movewithdir[f] = df
18135
a6fe1b9cc68f copies: make debug messages more sensible
Siddharth Agarwal <sid0@fb.com>
parents: 18134
diff changeset
   463
                        repo.ui.debug(("   pending file src: '%s' -> "
a6fe1b9cc68f copies: make debug messages more sensible
Siddharth Agarwal <sid0@fb.com>
parents: 18134
diff changeset
   464
                                       "dst: '%s'\n") % (f, df))
6274
f3f383efbeae copies: move findcopies code to its own module
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
   465
                    break
f3f383efbeae copies: move findcopies code to its own module
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
   466
18134
6c35b53cd28b copies: separate moves via directory renames from explicit copies
Siddharth Agarwal <sid0@fb.com>
parents: 17055
diff changeset
   467
    return copy, movewithdir, diverge, renamedelete
19178
4327687ca757 copies: refactor checkcopies() into a top level method
Durham Goode <durham@fb.com>
parents: 18899
diff changeset
   468
30138
733fb9f7bc92 checkcopies: extract the '_related' closure
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 30137
diff changeset
   469
def _related(f1, f2, limit):
733fb9f7bc92 checkcopies: extract the '_related' closure
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 30137
diff changeset
   470
    """return True if f1 and f2 filectx have a common ancestor
733fb9f7bc92 checkcopies: extract the '_related' closure
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 30137
diff changeset
   471
733fb9f7bc92 checkcopies: extract the '_related' closure
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 30137
diff changeset
   472
    Walk back to common ancestor to see if the two files originate
733fb9f7bc92 checkcopies: extract the '_related' closure
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 30137
diff changeset
   473
    from the same file. Since workingfilectx's rev() is None it messes
733fb9f7bc92 checkcopies: extract the '_related' closure
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 30137
diff changeset
   474
    up the integer comparison logic, hence the pre-step check for
733fb9f7bc92 checkcopies: extract the '_related' closure
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 30137
diff changeset
   475
    None (f1 and f2 can only be workingfilectx's initially).
733fb9f7bc92 checkcopies: extract the '_related' closure
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 30137
diff changeset
   476
    """
733fb9f7bc92 checkcopies: extract the '_related' closure
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 30137
diff changeset
   477
733fb9f7bc92 checkcopies: extract the '_related' closure
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 30137
diff changeset
   478
    if f1 == f2:
733fb9f7bc92 checkcopies: extract the '_related' closure
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 30137
diff changeset
   479
        return f1 # a match
733fb9f7bc92 checkcopies: extract the '_related' closure
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 30137
diff changeset
   480
733fb9f7bc92 checkcopies: extract the '_related' closure
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 30137
diff changeset
   481
    g1, g2 = f1.ancestors(), f2.ancestors()
733fb9f7bc92 checkcopies: extract the '_related' closure
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 30137
diff changeset
   482
    try:
733fb9f7bc92 checkcopies: extract the '_related' closure
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 30137
diff changeset
   483
        f1r, f2r = f1.linkrev(), f2.linkrev()
733fb9f7bc92 checkcopies: extract the '_related' closure
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 30137
diff changeset
   484
733fb9f7bc92 checkcopies: extract the '_related' closure
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 30137
diff changeset
   485
        if f1r is None:
733fb9f7bc92 checkcopies: extract the '_related' closure
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 30137
diff changeset
   486
            f1 = next(g1)
733fb9f7bc92 checkcopies: extract the '_related' closure
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 30137
diff changeset
   487
        if f2r is None:
733fb9f7bc92 checkcopies: extract the '_related' closure
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 30137
diff changeset
   488
            f2 = next(g2)
733fb9f7bc92 checkcopies: extract the '_related' closure
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 30137
diff changeset
   489
733fb9f7bc92 checkcopies: extract the '_related' closure
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 30137
diff changeset
   490
        while True:
733fb9f7bc92 checkcopies: extract the '_related' closure
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 30137
diff changeset
   491
            f1r, f2r = f1.linkrev(), f2.linkrev()
733fb9f7bc92 checkcopies: extract the '_related' closure
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 30137
diff changeset
   492
            if f1r > f2r:
733fb9f7bc92 checkcopies: extract the '_related' closure
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 30137
diff changeset
   493
                f1 = next(g1)
733fb9f7bc92 checkcopies: extract the '_related' closure
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 30137
diff changeset
   494
            elif f2r > f1r:
733fb9f7bc92 checkcopies: extract the '_related' closure
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 30137
diff changeset
   495
                f2 = next(g2)
733fb9f7bc92 checkcopies: extract the '_related' closure
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 30137
diff changeset
   496
            elif f1 == f2:
733fb9f7bc92 checkcopies: extract the '_related' closure
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 30137
diff changeset
   497
                return f1 # a match
733fb9f7bc92 checkcopies: extract the '_related' closure
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 30137
diff changeset
   498
            elif f1r == f2r or f1r < limit or f2r < limit:
733fb9f7bc92 checkcopies: extract the '_related' closure
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 30137
diff changeset
   499
                return False # copy no longer relevant
733fb9f7bc92 checkcopies: extract the '_related' closure
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 30137
diff changeset
   500
    except StopIteration:
733fb9f7bc92 checkcopies: extract the '_related' closure
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 30137
diff changeset
   501
        return False
733fb9f7bc92 checkcopies: extract the '_related' closure
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 30137
diff changeset
   502
30184
7321c6b0c9fd checkcopies: pass data as a dictionary of dictionaries
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 30183
diff changeset
   503
def _checkcopies(ctx, f, m1, m2, base, limit, data):
19178
4327687ca757 copies: refactor checkcopies() into a top level method
Durham Goode <durham@fb.com>
parents: 18899
diff changeset
   504
    """
4327687ca757 copies: refactor checkcopies() into a top level method
Durham Goode <durham@fb.com>
parents: 18899
diff changeset
   505
    check possible copies of f from m1 to m2
4327687ca757 copies: refactor checkcopies() into a top level method
Durham Goode <durham@fb.com>
parents: 18899
diff changeset
   506
26657
1ae898cfe857 copies: move _makegetfctx calls into checkcopies
Matt Mackall <mpm@selenic.com>
parents: 26656
diff changeset
   507
    ctx = starting context for f in m1
30136
8797eadb5d90 checkcopies: minor change to comment
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 30135
diff changeset
   508
    f = the filename to check (as in m1)
19178
4327687ca757 copies: refactor checkcopies() into a top level method
Durham Goode <durham@fb.com>
parents: 18899
diff changeset
   509
    m1 = the source manifest
4327687ca757 copies: refactor checkcopies() into a top level method
Durham Goode <durham@fb.com>
parents: 18899
diff changeset
   510
    m2 = the destination manifest
30135
3eae81c0a09d checkcopies: rename 'ca' to 'base'
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 30075
diff changeset
   511
    base = the changectx used as a merge base
19178
4327687ca757 copies: refactor checkcopies() into a top level method
Durham Goode <durham@fb.com>
parents: 18899
diff changeset
   512
    limit = the rev number to not search beyond
30185
e2bfe2d52d7a copies: move variable document from checkcopies to mergecopies
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 30184
diff changeset
   513
    data = dictionary of dictionary to store copy data. (see mergecopies)
30045
12cac1e4d6d9 copies: limit is an optimization, and doesn't provide guarantees
Gábor Stefanik <gabor.stefanik@nng.com>
parents: 29216
diff changeset
   514
12cac1e4d6d9 copies: limit is an optimization, and doesn't provide guarantees
Gábor Stefanik <gabor.stefanik@nng.com>
parents: 29216
diff changeset
   515
    note: limit is only an optimization, and there is no guarantee that
12cac1e4d6d9 copies: limit is an optimization, and doesn't provide guarantees
Gábor Stefanik <gabor.stefanik@nng.com>
parents: 29216
diff changeset
   516
    irrelevant revisions will not be limited
12cac1e4d6d9 copies: limit is an optimization, and doesn't provide guarantees
Gábor Stefanik <gabor.stefanik@nng.com>
parents: 29216
diff changeset
   517
    there is no easy way to make this algorithm stop in a guaranteed way
12cac1e4d6d9 copies: limit is an optimization, and doesn't provide guarantees
Gábor Stefanik <gabor.stefanik@nng.com>
parents: 29216
diff changeset
   518
    once it "goes behind a certain revision".
19178
4327687ca757 copies: refactor checkcopies() into a top level method
Durham Goode <durham@fb.com>
parents: 18899
diff changeset
   519
    """
4327687ca757 copies: refactor checkcopies() into a top level method
Durham Goode <durham@fb.com>
parents: 18899
diff changeset
   520
30135
3eae81c0a09d checkcopies: rename 'ca' to 'base'
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 30075
diff changeset
   521
    mb = base.manifest()
26657
1ae898cfe857 copies: move _makegetfctx calls into checkcopies
Matt Mackall <mpm@selenic.com>
parents: 26656
diff changeset
   522
    getfctx = _makegetfctx(ctx)
19178
4327687ca757 copies: refactor checkcopies() into a top level method
Durham Goode <durham@fb.com>
parents: 18899
diff changeset
   523
4327687ca757 copies: refactor checkcopies() into a top level method
Durham Goode <durham@fb.com>
parents: 18899
diff changeset
   524
    of = None
4327687ca757 copies: refactor checkcopies() into a top level method
Durham Goode <durham@fb.com>
parents: 18899
diff changeset
   525
    seen = set([f])
26315
3c6902ed9f07 copies: rename ctx() to getfctx() for clarity
Matt Mackall <mpm@selenic.com>
parents: 26013
diff changeset
   526
    for oc in getfctx(f, m1[f]).ancestors():
25279
708b19c18adf mergecopies: avoid slowdown from linkrev adjustment (issue4680)
Matt Mackall <mpm@selenic.com>
parents: 24782
diff changeset
   527
        ocr = oc.linkrev()
19178
4327687ca757 copies: refactor checkcopies() into a top level method
Durham Goode <durham@fb.com>
parents: 18899
diff changeset
   528
        of = oc.path()
4327687ca757 copies: refactor checkcopies() into a top level method
Durham Goode <durham@fb.com>
parents: 18899
diff changeset
   529
        if of in seen:
4327687ca757 copies: refactor checkcopies() into a top level method
Durham Goode <durham@fb.com>
parents: 18899
diff changeset
   530
            # check limit late - grab last rename before
4327687ca757 copies: refactor checkcopies() into a top level method
Durham Goode <durham@fb.com>
parents: 18899
diff changeset
   531
            if ocr < limit:
4327687ca757 copies: refactor checkcopies() into a top level method
Durham Goode <durham@fb.com>
parents: 18899
diff changeset
   532
                break
4327687ca757 copies: refactor checkcopies() into a top level method
Durham Goode <durham@fb.com>
parents: 18899
diff changeset
   533
            continue
4327687ca757 copies: refactor checkcopies() into a top level method
Durham Goode <durham@fb.com>
parents: 18899
diff changeset
   534
        seen.add(of)
4327687ca757 copies: refactor checkcopies() into a top level method
Durham Goode <durham@fb.com>
parents: 18899
diff changeset
   535
30184
7321c6b0c9fd checkcopies: pass data as a dictionary of dictionaries
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 30183
diff changeset
   536
        data['fullcopy'][f] = of # remember for dir rename detection
19178
4327687ca757 copies: refactor checkcopies() into a top level method
Durham Goode <durham@fb.com>
parents: 18899
diff changeset
   537
        if of not in m2:
4327687ca757 copies: refactor checkcopies() into a top level method
Durham Goode <durham@fb.com>
parents: 18899
diff changeset
   538
            continue # no match, keep looking
30135
3eae81c0a09d checkcopies: rename 'ca' to 'base'
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 30075
diff changeset
   539
        if m2[of] == mb.get(of):
30075
2c8ec8c2ddfe copies: don't record divergence for files needing no merge
Gábor Stefanik <gabor.stefanik@nng.com>
parents: 30048
diff changeset
   540
            return # no merge needed, quit early
26315
3c6902ed9f07 copies: rename ctx() to getfctx() for clarity
Matt Mackall <mpm@selenic.com>
parents: 26013
diff changeset
   541
        c2 = getfctx(of, m2[of])
30137
f85f9e069e09 checkcopies: add an inline comment about the '_related' call
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 30136
diff changeset
   542
        # c2 might be a plain new file on added on destination side that is
f85f9e069e09 checkcopies: add an inline comment about the '_related' call
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 30136
diff changeset
   543
        # unrelated to the droids we are looking for.
30135
3eae81c0a09d checkcopies: rename 'ca' to 'base'
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 30075
diff changeset
   544
        cr = _related(oc, c2, base.rev())
19178
4327687ca757 copies: refactor checkcopies() into a top level method
Durham Goode <durham@fb.com>
parents: 18899
diff changeset
   545
        if cr and (of == f or of == c2.path()): # non-divergent
30184
7321c6b0c9fd checkcopies: pass data as a dictionary of dictionaries
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 30183
diff changeset
   546
            data['copy'][f] = of
30075
2c8ec8c2ddfe copies: don't record divergence for files needing no merge
Gábor Stefanik <gabor.stefanik@nng.com>
parents: 30048
diff changeset
   547
            return
19178
4327687ca757 copies: refactor checkcopies() into a top level method
Durham Goode <durham@fb.com>
parents: 18899
diff changeset
   548
30135
3eae81c0a09d checkcopies: rename 'ca' to 'base'
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 30075
diff changeset
   549
    if of in mb:
30184
7321c6b0c9fd checkcopies: pass data as a dictionary of dictionaries
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 30183
diff changeset
   550
        data['diverge'].setdefault(of, []).append(f)
22901
722117c8e023 duplicatecopies: move from cmdutil to copies
Matt Mackall <mpm@selenic.com>
parents: 20990
diff changeset
   551
722117c8e023 duplicatecopies: move from cmdutil to copies
Matt Mackall <mpm@selenic.com>
parents: 20990
diff changeset
   552
def duplicatecopies(repo, rev, fromrev, skiprev=None):
722117c8e023 duplicatecopies: move from cmdutil to copies
Matt Mackall <mpm@selenic.com>
parents: 20990
diff changeset
   553
    '''reproduce copies from fromrev to rev in the dirstate
722117c8e023 duplicatecopies: move from cmdutil to copies
Matt Mackall <mpm@selenic.com>
parents: 20990
diff changeset
   554
722117c8e023 duplicatecopies: move from cmdutil to copies
Matt Mackall <mpm@selenic.com>
parents: 20990
diff changeset
   555
    If skiprev is specified, it's a revision that should be used to
722117c8e023 duplicatecopies: move from cmdutil to copies
Matt Mackall <mpm@selenic.com>
parents: 20990
diff changeset
   556
    filter copy records. Any copies that occur between fromrev and
722117c8e023 duplicatecopies: move from cmdutil to copies
Matt Mackall <mpm@selenic.com>
parents: 20990
diff changeset
   557
    skiprev will not be duplicated, even if they appear in the set of
722117c8e023 duplicatecopies: move from cmdutil to copies
Matt Mackall <mpm@selenic.com>
parents: 20990
diff changeset
   558
    copies between fromrev and rev.
722117c8e023 duplicatecopies: move from cmdutil to copies
Matt Mackall <mpm@selenic.com>
parents: 20990
diff changeset
   559
    '''
722117c8e023 duplicatecopies: move from cmdutil to copies
Matt Mackall <mpm@selenic.com>
parents: 20990
diff changeset
   560
    exclude = {}
26013
38f92d12357c copy: add flag for disabling copy tracing
Durham Goode <durham@fb.com>
parents: 25924
diff changeset
   561
    if (skiprev is not None and
38f92d12357c copy: add flag for disabling copy tracing
Durham Goode <durham@fb.com>
parents: 25924
diff changeset
   562
        not repo.ui.configbool('experimental', 'disablecopytrace')):
38f92d12357c copy: add flag for disabling copy tracing
Durham Goode <durham@fb.com>
parents: 25924
diff changeset
   563
        # disablecopytrace skips this line, but not the entire function because
38f92d12357c copy: add flag for disabling copy tracing
Durham Goode <durham@fb.com>
parents: 25924
diff changeset
   564
        # the line below is O(size of the repo) during a rebase, while the rest
38f92d12357c copy: add flag for disabling copy tracing
Durham Goode <durham@fb.com>
parents: 25924
diff changeset
   565
        # of the function is much faster (and is required for carrying copy
38f92d12357c copy: add flag for disabling copy tracing
Durham Goode <durham@fb.com>
parents: 25924
diff changeset
   566
        # metadata across the rebase anyway).
22901
722117c8e023 duplicatecopies: move from cmdutil to copies
Matt Mackall <mpm@selenic.com>
parents: 20990
diff changeset
   567
        exclude = pathcopies(repo[fromrev], repo[skiprev])
722117c8e023 duplicatecopies: move from cmdutil to copies
Matt Mackall <mpm@selenic.com>
parents: 20990
diff changeset
   568
    for dst, src in pathcopies(repo[fromrev], repo[rev]).iteritems():
722117c8e023 duplicatecopies: move from cmdutil to copies
Matt Mackall <mpm@selenic.com>
parents: 20990
diff changeset
   569
        # copies.pathcopies returns backward renames, so dst might not
722117c8e023 duplicatecopies: move from cmdutil to copies
Matt Mackall <mpm@selenic.com>
parents: 20990
diff changeset
   570
        # actually be in the dirstate
722117c8e023 duplicatecopies: move from cmdutil to copies
Matt Mackall <mpm@selenic.com>
parents: 20990
diff changeset
   571
        if dst in exclude:
722117c8e023 duplicatecopies: move from cmdutil to copies
Matt Mackall <mpm@selenic.com>
parents: 20990
diff changeset
   572
            continue
722117c8e023 duplicatecopies: move from cmdutil to copies
Matt Mackall <mpm@selenic.com>
parents: 20990
diff changeset
   573
        if repo.dirstate[dst] in "nma":
722117c8e023 duplicatecopies: move from cmdutil to copies
Matt Mackall <mpm@selenic.com>
parents: 20990
diff changeset
   574
            repo.dirstate.copy(src, dst)