system/home/progs/nvim/lua/coc.lua

-- Smaller updatetime for CursorHold & CursorHoldI
vim.opt.updatetime = 300

-- Coc don't use completeopt
vim.opt.completeopt = {}
-- don't give |ins-completion-menu| messages.
vim.opt.shortmess:append("c")

-- always show signcolumns
vim.opt.signcolumn = "yes"

-- Some server have issues with backup files, see coc#649
vim.opt.backup = false
vim.opt.writebackup = false

-- Better display for messages
vim.opt.cmdheight = 2

-- Use <c-space> for trigger completion.
vim.keymap.set("i", "<C-space>", vim.fn["coc#refresh"], {
	silent = true,
	expr = true,
})

-- Use <cr> for confirm completion, `<C-g>u` means break undo chain at current
-- position. Coc only does snippet and additional edit on confirm.
local function confirm_coc_completion()
	if vim.call("coc#pum#visible") == 1 then
		vim.call("coc#pum#confirm")
		return ""
	else
		return "<CR>"
	end
end
vim.keymap.set("i", "<CR>", confirm_coc_completion, { expr = true, silent = true })

local sr_opts = { silent = true, remap = true }
-- Use `[c` and `]c` for navigate diagnostics
vim.keymap.set("n", "[c", "<Plug>(coc-diagnostic-prev)", sr_opts)
vim.keymap.set("n", "]c", "<Plug>(coc-diagnostic-next)", sr_opts)

-- Remap keys for gotos
vim.keymap.set("n", "gd", "<Plug>(coc-definition)", sr_opts)
vim.keymap.set("n", "gy", "<Plug>(coc-type-definition)", sr_opts)
vim.keymap.set("n", "gi", "<Plug>(coc-implementation)", sr_opts)
vim.keymap.set("n", "gr", "<Plug>(coc-references)", sr_opts)

-- Remap for do code action of current line
vim.keymap.set("n", "<localleader>a", "<Plug>(coc-codeaction)")
-- Remap for rename current word
vim.keymap.set("n", "<localleader>n", "<Plug>(coc-rename)")

-- Mapping for CocList
vim.keymap.set("n", "<localleader>cl", ":CocList<CR>")
vim.keymap.set("n", "<localleader>cd", ":CocList diagnostics<CR>")
vim.keymap.set("n", "<localleader>cc", ":CocList commands<CR>")
vim.keymap.set("n", "<localleader>co", ":CocList outline<CR>")
vim.keymap.set("n", "<localleader>cs", ":CocList symbols<CR>")