comparison mercurial/copies.py @ 24782:4906dc0e038c

copies: add matcher parameter to copy logic

This allows passing a matcher down the pathcopies() stack to _forwardcopies().
This will let us add logic in a later patch to avoid tracing copies when not
necessary (like when doing hg diff -r 1 -r 2 foo.txt).

24781:055b3cbe6c57

    for k in c.keys():
        if ds[k] not in 'anm':
            del c[k]
    return c

def _computeforwardmissing(a, b):
    """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.
    """
    return b.manifest().filesnotin(a.manifest())

def _forwardcopies(a, b):
    '''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:

    # 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 = {}
    missing = _computeforwardmissing(a, b)
    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 v in a:
            continue
        r[v] = k
    return r

def pathcopies(x, y):
    '''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)
    if a == y:
        return _backwardrenames(x, y)
    return _chain(x, y, _backwardrenames(x, a), _forwardcopies(a, y))

def _computenonoverlap(repo, c1, c2, addedinm1, addedinm2):
    """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.

24782:4906dc0e038c

    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:

    # 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 = {}
    missing = _computeforwardmissing(a, b, match=match)
    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 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):
    """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.