I have joined the dark side! neovim with plugins!

added neovim support for treesitter and LSP, then added a bunch of
plugins to take advantage of them.

neovim/.config/nvim/lua/cmp-lsp.lua

@@ -0,0 +1,68 @@
+--configure nvim-cmp for use with lsp and luasnip.
+
+
+-- Add additional capabilities supported by nvim-cmp
+local capabilities = vim.lsp.protocol.make_client_capabilities()
+capabilities = require('cmp_nvim_lsp').update_capabilities(capabilities)
+
+
+local lspconfig = require('lspconfig')
+
+-- Enable some language servers with the additional completion capabilities offered by nvim-cmp
+local servers = { 'clangd', 'rust_analyzer', 'pyright', 'tsserver' }
+for _, lsp in ipairs(servers) do
+	lspconfig[lsp].setup {
+		-- on_attach = my_custom_on_attach,
+		capabilities = capabilities,
+	}
+end
+
+-- Set completeopt to have a better completion experience
+vim.o.completeopt = 'menuone,noselect'
+
+-- luasnip setup
+local luasnip = require 'luasnip'
+
+-- nvim-cmp setup
+local cmp = require 'cmp'
+cmp.setup {
+	snippet = {
+		expand = function(args)
+			require('luasnip').lsp_expand(args.body)
+		end,
+	},
+	mapping = {
+		['<C-p>'] = cmp.mapping.select_prev_item(),
+		['<C-n>'] = cmp.mapping.select_next_item(),
+		['<C-d>'] = cmp.mapping.scroll_docs(-4),
+		['<C-f>'] = cmp.mapping.scroll_docs(4),
+		['<C-Space>'] = cmp.mapping.complete(),
+		['<C-e>'] = cmp.mapping.close(),
+		['<CR>'] = cmp.mapping.confirm {
+			behavior = cmp.ConfirmBehavior.Replace,
+			select = true,
+		},
+		['<Tab>'] = function(fallback)
+			if cmp.visible() then
+				cmp.select_next_item()
+			elseif luasnip.expand_or_jumpable() then
+				luasnip.expand_or_jump()
+			else
+				fallback()
+			end
+		end,
+		['<S-Tab>'] = function(fallback)
+			if cmp.visible() then
+				cmp.select_prev_item()
+			elseif luasnip.jumpable(-1) then
+				luasnip.jump(-1)
+			else
+				fallback()
+			end
+		end,
+	},
+	sources = {
+		{ name = 'nvim_lsp' },
+		{ name = 'luasnip' },
+	},
+}