It Bears Repeating: Emacs 28 & Repeat Mode
reddit / emacs

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karthink · 2022-07-05 18:24



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jvillasante · 2022-07-05 19:19

I discover it last week and love it, `C-x o` is now usable out of the
box without having to install things like `ace-window`.

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00-11 · 2022-07-05 19:33

Good presentation; thx.

----

You might also have mentioned this other way of making a repeatable
command from one that's not repeatable:

    (defun repeat-command (command)
      "Repeat COMMAND."
      (require 'repeat)         ; Define its vars before we let-bind
them.
      (let ((repeat-previous-repeated-command  command)
            (repeat-message-function           #'ignore)
            (last-repeatable-command           'repeat))
        (repeat nil)))

    (defun shrink-window-repeat ()
      "..."
      (interactive)
      (require 'repeat)
      (repeat-command 'shrink-window))

    (defun whatever-repeat ()
      "..."
      (interactive)
      (require 'repeat)
      (repeat-command 'whatever))
...

That's not as convenient, of course, as it means giving the repeatable
command a binding (e.g. remapping the original command to it):

    (global-set-key [remap shrink-window] 'shrink-window-repeat)

----

(Minor)

> As a bonus [a `repeat-mode` benefit, presumably], you can repeat
invocations of the `repeat` command itself with just `z`, so it’s `C-x
z z z`... to repeat the last command multiple times.

You can already do that, without `repeat-mode`. That's the point of
command `repeat` (`C-x z`).

Or did I misunderstand what you meant to say there? Probably.

My impression is that you're hinting that one needs to use `C-x z`
repeatedly: `C-x z C-x z`... But the paragraph before that one shows
that you know that `C-x z z`... is what `repeat` itself offers. So
just what do you mean by the "bonus" sentence?

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MunsterPlop · 2022-07-05 19:48

It's a really good addition. I've been using it ever since it was
added and I find myself creating repeat maps for pretty much
everything that (in my case) needs it.

Now, what's left to make it perfect is maybe a macro to make it
simpler to create repeat maps. I know you can do it yourself (e.g.
https://tildegit.org/acdw/define-repeat-map.el) but having something
in repeat.el would be, imo, a good idea.

Last thing would be for repeat-keep-prefix to work properly but it's
apparently gonna be fixed in the next release.

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karthink · 2022-07-05 19:59

> You might also have mentioned this other way of making a repeatable
command from one that's not repeatable

Thanks, I hadn't considered this method before.

> So just what do you mean by the "bonus" sentence?

It's poorly worded. I only meant that you don't have to press the full
sequence`C-x z`, just `z` is enough. `repeat-mode` was meant to have
no bearing on this fact. I'll reword it.

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karthink · 2022-07-05 20:00

[Repeat Help](https://github.com/karthink/repeat-help), the auxiliary
package mentioned in the write-up.

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00-11 · 2022-07-05 20:23

Thx.

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dbk120 · 2022-07-06 18:10

Many thanks for the article. It looks like repeat-mode would be useful
for flymake-goto-next-error / previous-error. Any idea why this isn’t
built in?

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karthink · 2022-07-06 18:53

That's a good point. I have flymake errors hooked up to the regulalr
`next-error` and `previous-error` system, so I didn't notice that you
can't repeat them.

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dbk120 · 2022-07-06 20:10

It hadn’t occurred to me to do that.

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[deleted] · 2022-07-06 20:10

[deleted]

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biggrben · 2022-07-07 15:48

Great post! Thx!

Is there a way to make `C-p`, `C-n`, `C-f`, `C-b` style of navigation
comfortable too?

Like is there a way to shorten `C-n C-n C-n C-f C-f C-f` to `C-n n n f
f f`?

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karthink · 2022-07-07 17:04

Yes, you can make any set of commands repeat this way. If you want to
set every common command to repeat I'd recommend just using [god-
mode](https://github.com/emacsorphanage/god-mode) instead. Otherwise
you can modify the windmove repeat code near the end of the post to
suit your needs.

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_viz_ · 2022-07-08 05:46

Play around with repeat-check-key.  This bug report might be worth
reading: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=51390

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AblatedSprocket · 2022-07-09 13:46

Mind providing your config for this? Sounds useful.

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karthink · 2022-07-09 19:34

http://ix.io/424y/elisp

EDIT: This is from the Centaur Emacs config, IIRC.

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_viz_ · 2022-07-14 14:42

Rather than all that, you can simply set next-error-function to
flymake-goto-next-error.  This makes M-g n go to the next flymake
error.  cc. u/AblatedSprocket

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AblatedSprocket · 2022-07-14 14:43

Thanks! That's much more my speed :)