added configuration for autocomplete plugin

nvim/.config/nvim/after/plugin/nvim-cmp.lua

@@ -0,0 +1,69 @@
+-- Set up nvim-cmp.
+local cmp = require'cmp'
+
+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-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.
+    }),
+    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 `/` and `?` (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' }
+    })
+})
+
+-- Set up lspconfig.
+-- local capabilities = require('cmp_nvim_lsp').default_capabilities()
+-- -- Replace <YOUR_LSP_SERVER> with each lsp server you've enabled.
+-- require('lspconfig')['<YOUR_LSP_SERVER>'].setup {
+    --   capabilities = capabilities
+    -- }