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Neovim customization tips

viminfo on neovim:

  • Instead of the viminfo format, neovim uses shada files. For more details: :h shada. In linux, the default path of this file is: $HOME/.local/share/nvim/shada/main.shada.

Running lua functions:

(run below on NORMAL MODE)
:lua require'sample'.runExternalCommand()
:lua require'sample'.checkForErrorsAsBooleanVariable()
:lua require'sample'.welcomeToLua()

Lua functions/plugins development

  • Developing lua plugins interactively with a "REPL":
:Luapad

Example code to test the "REPL":

local module_path = "tiagoprn.scratchpad"

require("plenary.reload").reload_module(module_path)
local module = require(module_path)

local shouted = module.shout("hey tiago!")
print(shouted)

  • Here is a succint page explaining the basics on lua programming: https://riptutorial.com/lua

  • Where I can find the "extended library" that neovim exposes to lua? To discover the available methods, I can use the autocomplete provided by the lua LSP when writing code on INSERT mode. The following namespaces are available:

-- neovim lua API:
vim.<C-Space>
vim.api.<C-Space>
vim.fn.<C-Space>

-- my custom modules with other functions:
local helpers = require("tiagoprn.helpers")
local scratchpad = require("tiagoprn.scratchpad")
helpers.<C-Space>
scratchpad.<C-Space>

On those namespaces, there are string and list manipulation functions (that I wasted effort reinventing at tiagoprn.helpers not knowing that they existed - I must fix that when possible)

  • If I receive error "E41: Out of memory!" when opening a file, edit it outside of nvim and save it.

How export the mappings to an external file:

  1. Inside nvim:
:redir >> ~/mymaps.txt
:map
:redir END
  1. Starting nvim with the commands above, using "+" to script the commands:
nvim +"redir >> /tmp/automap.txt" +"map" +"redir END" +"qa!"

(you can use :verbose map instead of :map to get more info on the mappings.)

Custom telescope pickers

  • If I need to create/run more commands or a command palette using telescope pickers to choose from a list, I can create them on lua/easypick-conf.lua

Place with lots of neovim configs I can analyze

https://dotfyle.com/

How to program on a macro:

When recording, just press .

When editing the macro [^1] , type: "[Ctrl+b]Esc". It must be on another color so we can make sure it worked.

[^1] Macros are on registers. When I record macro "a", to get its contents I can get the register "a" value.

Create custom commands to integrate on the editor

Instead of using "Code Actions", I can use the "flow" plugin to run some lua+bash code to create my own ones. It is on the "automations" -> "flow" section of my setup.