nvim-cmp-config.lua

 -- Setup nvim-cmp.
-- local cmp_autopairs = require('nvim-autopairs.completion.cmp')
local cmp = require'cmp'

local has_words_before = function()
  if vim.api.nvim_buf_get_option(0, "buftype") == "prompt" then return false end
  local line, col = unpack(vim.api.nvim_win_get_cursor(0))
  return col ~= 0 and vim.api.nvim_buf_get_text(0, line-1, 0, line-1, col, {})[1]:match("^%s*$") == nil
end
cmp.setup({
  mapping = {
    
  },
})



   cmp.setup({
    snippet = {
      -- REQUIRED - you must specify a snippet engine
      expand = function(args)
        vim.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.
        -- vim.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-d>'] = cmp.mapping.scroll_docs(-4),
    ['<C-f>'] = cmp.mapping.scroll_docs(4),
    ['<C-Space>'] = cmp.mapping.complete(),
    ['<CR>'] = cmp.mapping.confirm {
      behavior = cmp.ConfirmBehavior.Replace,
      select = true,
    },
    ["<Tab>"] = vim.schedule_wrap(function(fallback)
      if cmp.visible() and has_words_before() then
        cmp.select_next_item({ behavior = cmp.SelectBehavior.Select })
      else
        fallback()
      end
    end),
    -- ['<Tab>'] = cmp.mapping(function(fallback)
    --   if cmp.visible() then
    --     cmp.select_next_item()
    --   else
    --     fallback()
    --   end
    -- end, { 'i', 's' }),
    ['<S-Tab>'] = cmp.mapping(function(fallback)
      if cmp.visible() then
        cmp.select_prev_item()
      else
        fallback()
      end
    end, { 'i', 's' }),
  }),
  sources = cmp.config.sources({
      { name = 'nvim_lsp', group_index=2 },
      { name = 'vsnip' , group_index=2}, -- For vsnip users.
      { name = 'path', group_index=2},
      { name = 'nvim_lsp_signature_help', group_index=2},
      { name = "copilot", group_index = 2 },
    -- Other Sources
      -- { 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 = 'nvim_lsp_document_symbol'}
    }, {
      { name = 'cmdline' }
    })
  })

-- cmp.event:on(
--   'confirm_done'
--   -- cmp_autopairs.on_confirm_done()
-- )