fix(nvim-cmp): fix nvim-cmp config

config/plugins/nvim-cmp.vim

@@ -1,10 +1,12 @@
+" we are using https://github.com/hrsh7th/nvim-cmp/tree/3192a0c57837c1ec5bf298e4f3ec984c7d2d60c0
+
 lua <<EOF
   -- Setup nvim-cmp.
   local cmp = require'cmp'
 
   cmp.setup({
-    mapping = cmp.mapping.preset.insert({
+    mapping = {
-      ['<C-d>'] = cmp.mapping(cmp.mapping.scroll_docs(-4), { 'i', 'c' }),
+      ['<C-b>'] = cmp.mapping(cmp.mapping.scroll_docs(-4), { 'i', 'c' }),
       ['<C-f>'] = cmp.mapping(cmp.mapping.scroll_docs(4), { 'i', 'c' }),
       ['<C-Space>'] = cmp.mapping(cmp.mapping.complete(), { 'i', 'c' }),
       ['<C-y>'] = cmp.config.disable, -- Specify `cmp.config.disable` if you want to remove the default `<C-y>` mapping.
@@ -12,33 +14,20 @@ lua <<EOF
         i = cmp.mapping.abort(),
         c = cmp.mapping.close(),
       }),
-      ['<CR>'] = cmp.mapping.confirm({ select = true }),
+      ['<CR>'] = cmp.mapping.confirm({ select = true }), -- Accept currently selected item. Set `select` to `false` to only confirm explicitly selected items.
-      ['<Tab>'] = function(fallback)
-        if cmp.visible() then
-          cmp.select_next_item()
-        else
-          fallback()
-        end
-      end,
-      ['<S-Tab>'] = function(fallback)
-        if cmp.visible() then
-          cmp.select_prev_item()
-        else
-          fallback()
-        end
-      end,
-    }),
-    formatting = {
-      format = require("lspkind").cmp_format({with_text = true, menu = ({
-          buffer = "[Buffer]",
-        })}),
     },
     sources = cmp.config.sources({
       { name = 'nvim_lsp' },
+      { name = 'path' }, -- For vsnip users.
+      -- { name = 'luasnip' }, -- For luasnip users.
+      -- { name = 'ultisnips' }, -- For ultisnips users.
+      -- { name = 'snippy' }, -- For snippy users.
     }, {
       { name = 'buffer' },
-    }, {
-      { name = 'path' },
     })
   })
+
+  -- Setup lspconfig.
+  local capabilities = require('cmp_nvim_lsp').update_capabilities(vim.lsp.protocol.make_client_capabilities())
+  -- Replace <YOUR_LSP_SERVER> with each lsp server you've enabled.
 EOF