comparison mercurial/merge.py @ 45550:2b339c6c6e99

merge: add a back_out() function to encapsulate update()

I've sent several earlier patches adding `merge.clean_update()`,
`merge.merge()` etc, one function for each use case. This patch
continues that work. I plan to hide the complex `update()` eventually.

Differential Revision: https://phab.mercurial-scm.org/D9064

45549:68906595016c

            # fix up dirstate for copies and renames
            copies.graftcopies(wctx, ctx, base)
    return stats


def purge(
    repo,
    matcher,
    unknown=True,
    ignored=False,

45550:2b339c6c6e99

            # fix up dirstate for copies and renames
            copies.graftcopies(wctx, ctx, base)
    return stats


def back_out(ctx, parent=None, wc=None):
    if parent is None:
        if ctx.p2() is not None:
            raise error.ProgrammingError(
                b"must specify parent of merge commit to back out"
            )
        parent = ctx.p1()
    return update(
        ctx.repo(),
        parent,
        branchmerge=True,
        force=True,
        ancestor=ctx.node(),
        mergeancestor=False,
    )


def purge(
    repo,
    matcher,
    unknown=True,
    ignored=False,