comparison mercurial/merge.py @ 15673:d550168f11ce stable

merge: check filename case collision between changesets for branch merging

this patch makes branch merging abort when merged changesets have same
file in different case on case insensitive filesystem.

this patch does not prevent linear update which merges between target
and working contexts, because 'branchmerge' is False in such case.

15672:2ebe3d0ce91d

        f = foldf(fn)
        if f in folded and mctx[folded[f]].cmp(wctx[f]):
            raise util.Abort(_("untracked file in working directory differs"
                               " from file in requested revision: '%s'") % fn)

def _checkcollision(mctx):
    "check for case folding collisions in the destination context"
    folded = {}
    for fn in mctx:
        fold = util.normcase(fn)
        if fold in folded:
            raise util.Abort(_("case-folding collision between %s and %s")
                             % (fn, folded[fold]))
        folded[fold] = fn

def _forgetremoved(wctx, mctx, branchmerge):
    """
    Forget removed files

        wc.status(unknown=True) # prime cache
        folding = not util.checkcase(repo.path)
        if not force:
            _checkunknown(wc, p2, folding)
        if folding:
            _checkcollision(p2)
        action += _forgetremoved(wc, p2, branchmerge)
        action += manifestmerge(repo, wc, p2, pa, overwrite, partial)

        ### apply phase
        if not branchmerge: # just jump to the new rev

15673:d550168f11ce

        f = foldf(fn)
        if f in folded and mctx[folded[f]].cmp(wctx[f]):
            raise util.Abort(_("untracked file in working directory differs"
                               " from file in requested revision: '%s'") % fn)

def _checkcollision(mctx, wctx):
    "check for case folding collisions in the destination context"
    folded = {}
    for fn in mctx:
        fold = util.normcase(fn)
        if fold in folded:
            raise util.Abort(_("case-folding collision between %s and %s")
                             % (fn, folded[fold]))
        folded[fold] = fn

    if wctx:
        for fn in wctx:
            fold = util.normcase(fn)
            mfn = folded.get(fold, None)
            if mfn and (mfn != fn):
                raise util.Abort(_("case-folding collision between %s and %s")
                                 % (mfn, fn))

def _forgetremoved(wctx, mctx, branchmerge):
    """
    Forget removed files

        wc.status(unknown=True) # prime cache
        folding = not util.checkcase(repo.path)
        if not force:
            _checkunknown(wc, p2, folding)
        if folding:
            _checkcollision(p2, branchmerge and p1)
        action += _forgetremoved(wc, p2, branchmerge)
        action += manifestmerge(repo, wc, p2, pa, overwrite, partial)

        ### apply phase
        if not branchmerge: # just jump to the new rev