comparison mercurial/merge.py @ 45499:19590b126764

merge: use in-memory mergestate when using in-memory context

This is my version of Augie's D8568. It makes it so we don't touch the
mergestate on disk when using an in-memory context.

The reason that I want this is not the same as the reason that Augie
write his patch (though I agree with that reason too). My hope is to
make in-memory rebase not fall back to on-disk rebase when there are
conflict. I plan to do that by adding a
`overlayworkingctx.reflect_in_workingcopy()`. The idea is that that
will update the working copy, the dirstate and the mergestate as
necessary.

Differential Revision: https://phab.mercurial-scm.org/D9040

45498:cc5f811b1f15

    """

    _prefetchfiles(repo, mctx, mresult)

    updated, merged, removed = 0, 0, 0
    ms = mergestatemod.mergestate.clean(repo)
    ms.start(wctx.p1().node(), mctx.node(), labels)

    for f, op in pycompat.iteritems(mresult.commitinfo):
        # the other side of filenode was choosen while merging, store this in
        # mergestate so that it can be reused on commit

    # driver has changed, and we want to be able to bypass it when overwrite is
    # True
    usemergedriver = not overwrite and mergeactions and ms.mergedriver

    if usemergedriver:
        if wctx.isinmemory():
            raise error.InMemoryMergeConflictsError(
                b"in-memory merge does not support mergedriver"
            )
        ms.commit()
        proceed = driverpreprocess(repo, ms, wctx, labels=labels)
        # the driver might leave some files unresolved
        unresolvedf = set(ms.unresolved())
        if not proceed:

        overwrite = force and not branchmerge
        ### check phase
        if not overwrite:
            if len(pl) > 1:
                raise error.Abort(_(b"outstanding uncommitted merge"))
            ms = mergestatemod.mergestate.read(repo)
            if list(ms.unresolved()):
                raise error.Abort(
                    _(b"outstanding merge conflicts"),
                    hint=_(b"use 'hg resolve' to resolve"),
                )

45499:19590b126764

    """

    _prefetchfiles(repo, mctx, mresult)

    updated, merged, removed = 0, 0, 0
    ms = wctx.mergestate(clean=True)
    ms.start(wctx.p1().node(), mctx.node(), labels)

    for f, op in pycompat.iteritems(mresult.commitinfo):
        # the other side of filenode was choosen while merging, store this in
        # mergestate so that it can be reused on commit

    # driver has changed, and we want to be able to bypass it when overwrite is
    # True
    usemergedriver = not overwrite and mergeactions and ms.mergedriver

    if usemergedriver:
        ms.commit()
        proceed = driverpreprocess(repo, ms, wctx, labels=labels)
        # the driver might leave some files unresolved
        unresolvedf = set(ms.unresolved())
        if not proceed:

        overwrite = force and not branchmerge
        ### check phase
        if not overwrite:
            if len(pl) > 1:
                raise error.Abort(_(b"outstanding uncommitted merge"))
            ms = wc.mergestate()
            if list(ms.unresolved()):
                raise error.Abort(
                    _(b"outstanding merge conflicts"),
                    hint=_(b"use 'hg resolve' to resolve"),
                )