return {
  'hrsh7th/nvim-cmp',
  dependencies = {
    'dcampos/cmp-snippy',
    --'mstanciu552/cmp-matlab',
    'petertriho/cmp-git',
    'hrsh7th/cmp-buffer',
    'hrsh7th/cmp-cmdline',
    'hrsh7th/cmp-nvim-lsp',
    'hrsh7th/cmp-path',
    'hrsh7th/cmp-calc',
  },
  event = "InsertEnter",
  config = function()
    local cmp = require'cmp'

    cmp.setup({
        -- snippet = {
        --     expand = function(args)
        --         require('snippy').expand_snippet(args.body)
        --     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 = false }),
        }),
        sources = cmp.config.sources({
            { name = 'nvim_lsp' },
            { name = 'path' },
            { name = 'snippy' },
            { name = 'calc' },
            -- { name = 'cmp_matlab' },
            { name = 'cmp_git' },
        }, {
            { name = 'buffer', keyword_length = 5, max_item_count = 10, priority = -5 },
        }),
        sorting = {
            comparators = {
                cmp.config.compare.offset,
                cmp.config.compare.exact,
                cmp.config.compare.recently_used,
                require("clangd_extensions.cmp_scores"),
                cmp.config.compare.kind,
                cmp.config.compare.sort_text,
                cmp.config.compare.length,
                cmp.config.compare.order,
            },
        },
    })

    cmp.setup.cmdline({'/', '?'}, {
        mapping = cmp.mapping.preset.cmdline(),
        sources = {
            { name = 'buffer' }
        }
    })

    cmp.setup.cmdline(':', {
        mapping = cmp.mapping.preset.cmdline(),
        sources = cmp.config.sources({
            { name = 'path' } 
        }, {
            { name = 'cmdline' } 
        })
    })

    cmp.setup.filetype('gitcommit', {
        sources = cmp.config.sources({
            {name = 'cmp_git' },
        }, {
            {name = 'buffer' }
        })
    })

    require("cmp_git").setup()
  end
}