Intro
I used to have a very large vimrc but now, I decided to write my own init.lua, after writing almost everything essential I started to port my functions, things like the Preserve function, so I can delete trailing spaces without moving my cursor.
local M = {}
M.preserve = function(arguments)
local arguments = string.format("keepjumps keeppatterns execute %q", arguments)
-- local original_cursor = vim.fn.winsaveview()
local line, col = unpack(vim.api.nvim_win_get_cursor(0))
vim.api.nvim_command(arguments)
local lastline = vim.fn.line("$")
-- vim.fn.winrestview(original_cursor)
if line > lastline then
line = lastline
end
vim.api.nvim_win_set_cursor({ 0 }, { line, col })
end
return M
After writing the above function you can do:
vim.cmd([[cnoreab cls Preserve]])
vim.cmd([[command! Preserve lua preserve('%s/\\s\\+$//ge')]])
vim.cmd([[command! Reindent lua preserve("sil keepj normal! gg=G")]])
vim.cmd([[command! BufOnly lua preserve("silent! %bd|e#|bd#")]])
Change file header helper
What about updating your file header every time you save, I mean, type:
:update<cr>?
--> :lua changeheader()
-- This function is called with the BufWritePre event (autocmd)
-- and when I want to save a file I use ":update" which
-- only writes a buffer if it was modified
M.changeheader = function()
-- We only can run this function if the file is modifiable
if not vim.api.nvim_buf_get_option(vim.api.nvim_get_current_buf(), "modifiable") then
return
end
if vim.fn.line("$") >= 7 then
os.setlocale("en_US.UTF-8") -- show Sun instead of dom (portuguese)
time = os.date("%a, %d %b %Y %H:%M")
M.preserve("sil! keepp keepj 1,7s/\\vlast (modified|change):\\zs.*/ " .. time .. "/ei")
end
end
Next section you can see how the function above is triggered/associated with the BufWritePre event, changing automatically your file header where you can read: "Last Change:".
For you autocommands you can do:
-- autocommands
--- This function is taken from https://github.com/norcalli/nvim_utils
function nvim_create_augroups(definitions)
for group_name, definition in pairs(definitions) do
api.nvim_command('augroup '..group_name)
api.nvim_command('autocmd!')
for _, def in ipairs(definition) do
local command = table.concat(vim.tbl_flatten{'autocmd', def}, ' ')
api.nvim_command(command)
end
api.nvim_command('augroup END')
end
end
local autocmds = {
reload_vimrc = {
-- Reload vim config automatically
{"BufWritePost",[[$VIM_PATH/{*.vim,*.yaml,vimrc} nested source $MYVIMRC | redraw]]};
};
change_header = {
{"BufWritePre", "*", "lua changeheader()"}
};
packer = {
{ "BufWritePost", "plugins.lua", "PackerCompile" };
};
terminal_job = {
{ "TermOpen", "*", [[tnoremap <buffer> <Esc> <c-\><c-n>]] };
{ "TermOpen", "*", "startinsert" };
{ "TermOpen", "*", "setlocal listchars= nonumber norelativenumber" };
};
restore_cursor = {
{ 'BufRead', '*', [[call setpos(".", getpos("'\""))]] };
};
save_shada = {
{"VimLeave", "*", "wshada!"};
};
resize_windows_proportionally = {
{ "VimResized", "*", ":wincmd =" };
};
toggle_search_highlighting = {
{ "InsertEnter", "*", "setlocal nohlsearch" };
};
lua_highlight = {
{ "TextYankPost", "*", [[silent! lua vim.highlight.on_yank() {higroup="IncSearch", timeout=400}]] };
};
ansi_esc_log = {
{ "BufEnter", "*.log", ":AnsiEsc" };
};
}
nvim_create_augroups(autocmds)
-- autocommands END
Squeeze blank lines
M.squeeze_blank_lines = function()
-- references: https://vi.stackexchange.com/posts/26304/revisions
if vim.bo.binary == false and vim.opt.filetype:get() ~= "diff" then
local old_query = vim.fn.getreg("/") -- save search register
M.preserve("sil! 1,.s/^\\n\\{2,}/\\r/gn") -- set current search count number
local result = vim.fn.searchcount({ maxcount = 1000, timeout = 500 }).current
local line, col = unpack(vim.api.nvim_win_get_cursor(0))
M.preserve("sil! keepp keepj %s/^\\n\\{2,}/\\r/ge")
M.preserve("sil! keepp keepj %s/\\v($\\n\\s*)+%$/\\r/e")
if result > 0 then
vim.api.nvim_win_set_cursor({ 0 }, { (line - result), col })
end
vim.fn.setreg("/", old_query) -- restore search register
end
end
map helper
-- map helper
local function map(mode, lhs, rhs, opts)
local options = {noremap = true}
if opts then options = vim.tbl_extend('force', options, opts) end
vim.api.nvim_set_keymap(mode, lhs, rhs, options)
end
map('n', '<leader>d', ':lua delblanklines()<cr>')
This article can change/grow a little bit
References:
The main source I have used was this post on neovim.discourse.group
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