kylechui

Note: While this is public, this is mostly written for my own sake, to better understand these concepts in relation to their pure mathematical foundations. Comments and suggestions welcome!

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Table of contents

• Introduction
• Monoids

kylechui

Adding dot-repeat to your Neovim plugin

In Neovim, the . character repeats "the most recent action"; however, this is not always respected by plugin actions. Here we will explore how to build dot-repeat support directly into your plugin, bypassing the requirement of dependencies like repeat.vim.

The Basics

When some buffer-modifying action is performed, Neovim implicitly remembers the operator (e.g. d), motion (e.g. iw), and some other miscellaneous information. When the dot-repeat command is called, Neovim repeats that operator-motion combination. For example, if we type ci"text<Esc>, then we replace the inner contents of some double quotes with text, i.e. "hello world" → "text". Dot-repeating from here will do the same, i.e. "more samples" → "text".

Using operatorfunc

kylechui

-- This assumes that you're testing with plenary, and your test file is in tests/[plugin]_spec.lua
-- Put this in `ftplugin/lua.lua`
vim.keymap.set("n", "<Leader>t", function()
    -- Get the current path and traverse upwards until you find the folder that contains tests/
    local cur_path = vim.fn.expand("%:p:h")
    while cur_path and vim.fn.finddir("tests", cur_path) == "" do
        cur_path = cur_path:match("(.*)/.*")
    end

    if cur_path then