How to keep in the undo history just one change for this command?

Question

I want to keep in the undo history just one change for a long command such as: d0kJx. (I took the command from this answer.)

This command (d0kJx) does this (The ^ is the cursor position):

Before:

a bc def ghi
j k l mn o p q rs
      ^

After:

a bc def ghimn o p q rs
            ^

If this is possible, how can I do this? I think that maybe the answer is to extend the command in some way.

Thank you very much! :-)

Answer 1

I think you are interested in :h undo-blocks.

To make the long command, e.g. d0kJx, undoable as a single change, you can run it from the command line through normal, e.g.:

:normal! d0kJx

Here the ! ensures that we do not use custom mappings.