nvim/lua/config/cmp.lua

local cmp = require "cmp"
local cmp_lsp = require "cmp_nvim_lsp"

local M = {}

M.capabilities =
    vim.tbl_deep_extend("force", {}, vim.lsp.protocol.make_client_capabilities(), cmp_lsp.default_capabilities())

local cmp_kinds = {
    Text = "  ",
    Method = "  ",
    Function = "  ",
    Constructor = "  ",
    Field = "  ",
    Variable = "  ",
    Class = "  ",
    Interface = "  ",
    Module = "  ",
    Property = "  ",
    Unit = "  ",
    Value = "  ",
    Enum = "  ",
    Keyword = "  ",
    Snippet = "  ",
    Color = "  ",
    File = "  ",
    Reference = "  ",
    Folder = "  ",
    EnumMember = "  ",
    Constant = "  ",
    Struct = "  ",
    Event = "  ",
    Operator = "  ",
    TypeParameter = "  ",
}

cmp.setup {
    formatting = {
        fields = { "kind", "abbr" },
        format = function(entry, vim_item)
            vim_item.kind = cmp_kinds[vim_item.kind] or ""
            if entry.completion_item.detail then
                vim_item.menu = entry.completion_item.detail
            end
            return vim_item
        end,
    },
    completion = { completeopt = "menu,menuone" },
    snippet = {
        expand = function(args)
            require("luasnip").lsp_expand(args.body)
        end,
    },
    mapping = { -- change later zach is ????
        ["<C-d>"] = cmp.mapping.scroll_docs(-4),
        ["<C-f>"] = cmp.mapping.scroll_docs(4),
        ["<C-Space>"] = cmp.mapping.complete(),
        ["<C-e>"] = cmp.mapping.close(),
        ["<CR>"] = cmp.mapping.confirm {
            behavior = cmp.ConfirmBehavior.Insert,
            select = true,
        },
        ["<Tab>"] = cmp.mapping(function(fallback)
            if cmp.visible() then
                cmp.select_next_item()
            elseif require("luasnip").expand_or_jumpable() then
                require("luasnip").expand_or_jump()
            else
                fallback()
            end
        end, { "i", "s" }),
        ["<S-Tab>"] = cmp.mapping(function(fallback)
            if cmp.visible() then
                cmp.select_prev_item()
            elseif require("luasnip").jumpable(-1) then
                require("luasnip").jump(-1)
            else
                fallback()
            end
        end, { "i", "s" }),
    },

    sources = cmp.config.sources {
        { name = "path" },
        { name = "nvim_lsp" },
        { name = "luasnip" }, -- snip snip
        { name = "buffer" },
        { name = "nvim_lua" },
    },
}

return M