Refactor nvim packer configuration

home/.config/nvim/lua/plugins/completion.lua

@@ -0,0 +1,57 @@
+-- Add additional capabilities supported by nvim-cmp
+local capabilities = vim.lsp.protocol.make_client_capabilities()
+capabilities = require('cmp_nvim_lsp').update_capabilities(capabilities)
+--
+-- 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' },
+    { name = 'path' },
+  },
+}
+
+-- load friendly-snippets to luasnip
+require('luasnip/loaders/from_vscode').lazy_load()