comparison mercurial/commands.py @ 20791:8dd867bd67e1

backout: improve confusing 'cannot backout change on a different branch' abort

These days 'branch' usually refer to a named branch.

Instead, abort with 'cannot backout change that not is an ancestor'.

20790:49f2d5644f04

    node = scmutil.revsingle(repo, rev).node()

    op1, op2 = repo.dirstate.parents()
    a = repo.changelog.ancestor(op1, node)
    if a != node:
        raise util.Abort(_('cannot backout change on a different branch'))

    p1, p2 = repo.changelog.parents(node)
    if p1 == nullid:
        raise util.Abort(_('cannot backout a change with no parents'))
    if p2 != nullid:

20791:8dd867bd67e1

    node = scmutil.revsingle(repo, rev).node()

    op1, op2 = repo.dirstate.parents()
    a = repo.changelog.ancestor(op1, node)
    if a != node:
        raise util.Abort(_('cannot backout change that is not an ancestor'))

    p1, p2 = repo.changelog.parents(node)
    if p1 == nullid:
        raise util.Abort(_('cannot backout a change with no parents'))
    if p2 != nullid: