nvim-config/lua/core/cmp_lsp/cmp/config.lua

local fn = vim.fn

-- nvim-cmp. completions
local cmp = require 'cmp'
local types = require('cmp.types')

cmp.setup({
  snippet = {
    -- REQUIRED - you must specify a snippet engine
    expand = function(args)
      fn["vsnip#anonymous"](args.body)       -- For `vsnip` users.
      -- require('luasnip').lsp_expand(args.body) -- For `luasnip` users.
      -- require('snippy').expand_snippet(args.body) -- For `snippy` users.
      -- fn["UltiSnips#Anon"](args.body) -- For `ultisnips` users.
    end,
  },
  window = {
    -- completion = cmp.config.window.bordered(),
    -- documentation = cmp.config.window.bordered(),
  },
  mapping = cmp.mapping.preset.insert({
    ['<C-b>'] = cmp.mapping.scroll_docs(-4),
    ['<C-f>'] = cmp.mapping.scroll_docs(4),
    ['<C-Space>'] = cmp.mapping.complete(),
    ['<C-e>'] = cmp.mapping.abort(),
    ['<CR>'] = cmp.mapping.confirm({ select = true }),     -- Accept currently selected item. Set `select` to `false` to only confirm explicitly selected items.
    ['<C-j>'] = {
      i = cmp.mapping.select_next_item({ behavior = types.cmp.SelectBehavior.Insert }),
    },
    ['<C-k>'] = {
      i = cmp.mapping.select_prev_item({ behavior = types.cmp.SelectBehavior.Insert }),
    },
  }),
  sources = cmp.config.sources({
    { name = 'nvim_lsp' },
    { name = 'vsnip' },     -- For vsnip users.
    -- { name = 'luasnip' }, -- For luasnip users.
    -- { name = 'ultisnips' }, -- For ultisnips users.
    -- { name = 'snippy' }, -- For snippy users.
  }, {
    { name = 'buffer' },
  })
})

-- Set configuration for specific filetype.
cmp.setup.filetype('gitcommit', {
  sources = cmp.config.sources({
    { name = 'cmp_git' },     -- You can specify the `cmp_git` source if you were installed it.
  }, {
    { name = 'buffer' },
  })
})

-- Use buffer source for `/` (if you enabled `native_menu`, this won't work anymore).
cmp.setup.cmdline('/', {
  mapping = cmp.mapping.preset.cmdline(),
  sources = {
    { name = 'buffer' }
  }
})

-- Use cmdline & path source for ':' (if you enabled `native_menu`, this won't work anymore).
cmp.setup.cmdline(':', {
  mapping = cmp.mapping.preset.cmdline(),
  sources = cmp.config.sources({
    { name = 'path' }
  }, {
    { name = 'cmdline' }
  })
})

require('nvim-lightbulb').setup({
  autocmd = {
    enabled = true
  }
})