comparison mercurial/copies.py @ 45640:2693659c2b34

copies: directly pass a changes object to the copy tracing code

The object contains all the data we need. For example, the `is_merged` callback
can now use the associated precomputed data.

This will be useful again soon when the `salvaged` set will be introduce to
solve the issue with delete file reverted during a merge. See 4b582a93316a and
14be07d5603c for details.

Differential Revision: https://phab.mercurial-scm.org/D9117

45639:7a757e893532

            )
    return cm


def _revinfo_getter(repo):
    """return a function that return multiple data given a <rev>"i

    * p1: revision number of first parent
    * p2: revision number of first parent
    * p1copies: mapping of copies from p1
    * p2copies: mapping of copies from p2
    * removed: a list of removed files
    * ismerged: a callback to know if file was merged in that revision
    """
    cl = repo.changelog
    parents = cl.parentrevs

    def get_ismerged(rev):
        ctx = repo[rev]

        def ismerged(path):
            if path not in ctx.files():
                return False
            fctx = ctx[path]
            parents = fctx._filelog.parents(fctx._filenode)
            nb_parents = 0
            for n in parents:
                if n != node.nullid:
                    nb_parents += 1
            return nb_parents >= 2

        return ismerged

    changelogrevision = cl.changelogrevision

    # A small cache to avoid doing the work twice for merges
    #

        p1, p2 = parents(rev)
        value = None
        e = merge_caches.pop(rev, None)
        if e is not None:
            return e
        c = changelogrevision(rev)
        p1copies = c.p1copies
        p2copies = c.p2copies
        removed = c.filesremoved
        if p1 != node.nullrev and p2 != node.nullrev:
            # XXX some case we over cache, IGNORE
            value = merge_caches[rev] = (
                p1,
                p2,
                p1copies,
                p2copies,
                removed,
                get_ismerged(rev),
            )

        if value is None:
            value = (p1, p2, p1copies, p2copies, removed, get_ismerged(rev))
        return value

    return revinfo

        copies = all_copies.pop(r, None)
        if copies is None:
            # this is a root
            copies = {}
        for i, c in enumerate(children[r]):
            p1, p2, p1copies, p2copies, removed, ismerged = revinfo(c)
            if r == p1:
                parent = 1
                childcopies = p1copies
            else:
                assert r == p2
                parent = 2
                childcopies = p2copies
            if not alwaysmatch:
                childcopies = {
                    dst: src for dst, src in childcopies.items() if match(dst)
                }
            newcopies = copies

                    prev = copies.get(source)
                    if prev is not None and prev[1] is not None:
                        source = prev[1]
                    newcopies[dest] = (c, source)
                assert newcopies is not copies
            for f in removed:
                if f in newcopies:
                    if newcopies is copies:
                        # copy on write to avoid affecting potential other
                        # branches.  when there are no other branches, this
                        # could be avoided.

                # This is an arbitrary choice made anew when implementing
                # changeset based copies. It was made without regards with
                # potential filelog related behavior.
                if parent == 1:
                    _merge_copies_dict(
                        othercopies, newcopies, isancestor, ismerged
                    )
                else:
                    _merge_copies_dict(
                        newcopies, othercopies, isancestor, ismerged
                    )
                    all_copies[c] = newcopies

    final_copies = {}
    for dest, (tt, source) in all_copies[targetrev].items():
        if source is not None:
            final_copies[dest] = source
    return final_copies


def _merge_copies_dict(minor, major, isancestor, ismerged):
    """merge two copies-mapping together, minor and major

    In case of conflict, value from "major" will be picked.

    - `isancestors(low_rev, high_rev)`: callable return True if `low_rev` is an

            # content from "major" wins, unless it is older
            # than the branch point or there is a merge
            if (
                new_tt == other_tt
                or not isancestor(new_tt, other_tt)
                or ismerged(dest)
            ):
                minor[dest] = value


def _revinfo_getter_extra(repo):

45640:2693659c2b34

            )
    return cm


def _revinfo_getter(repo):
    """returns a function that returns the following data given a <rev>"

    * p1: revision number of first parent
    * p2: revision number of first parent
    * changes: a ChangingFiles object
    """
    cl = repo.changelog
    parents = cl.parentrevs

    changelogrevision = cl.changelogrevision

    # A small cache to avoid doing the work twice for merges
    #

        p1, p2 = parents(rev)
        value = None
        e = merge_caches.pop(rev, None)
        if e is not None:
            return e
        value = (p1, p2, changelogrevision(rev).changes)
        if p1 != node.nullrev and p2 != node.nullrev:
            # XXX some case we over cache, IGNORE
            merge_caches[rev] = value
        return value

    return revinfo

        copies = all_copies.pop(r, None)
        if copies is None:
            # this is a root
            copies = {}
        for i, c in enumerate(children[r]):
            p1, p2, changes = revinfo(c)
            if r == p1:
                parent = 1
                childcopies = changes.copied_from_p1
            else:
                assert r == p2
                parent = 2
                childcopies = changes.copied_from_p2
            if not alwaysmatch:
                childcopies = {
                    dst: src for dst, src in childcopies.items() if match(dst)
                }
            newcopies = copies

                    prev = copies.get(source)
                    if prev is not None and prev[1] is not None:
                        source = prev[1]
                    newcopies[dest] = (c, source)
                assert newcopies is not copies
            for f in changes.removed:
                if f in newcopies:
                    if newcopies is copies:
                        # copy on write to avoid affecting potential other
                        # branches.  when there are no other branches, this
                        # could be avoided.

                # This is an arbitrary choice made anew when implementing
                # changeset based copies. It was made without regards with
                # potential filelog related behavior.
                if parent == 1:
                    _merge_copies_dict(
                        othercopies, newcopies, isancestor, changes
                    )
                else:
                    _merge_copies_dict(
                        newcopies, othercopies, isancestor, changes
                    )
                    all_copies[c] = newcopies

    final_copies = {}
    for dest, (tt, source) in all_copies[targetrev].items():
        if source is not None:
            final_copies[dest] = source
    return final_copies


def _merge_copies_dict(minor, major, isancestor, changes):
    """merge two copies-mapping together, minor and major

    In case of conflict, value from "major" will be picked.

    - `isancestors(low_rev, high_rev)`: callable return True if `low_rev` is an

            # content from "major" wins, unless it is older
            # than the branch point or there is a merge
            if (
                new_tt == other_tt
                or not isancestor(new_tt, other_tt)
                or dest in changes.merged
            ):
                minor[dest] = value


def _revinfo_getter_extra(repo):