chore(vim): add completion plugins and configuration

nvim/plugins/cmp.lua

@@ -0,0 +1,51 @@
+-- nvim-cmp
+-- https://github.com/hrsh7th/nvim-cmp
+
+local status, cmp = pcall(require, 'cmp')
+if (not status) then return end
+
+cmp.setup({
+  auto_select = false,
+  snippet = {
+    expand = function(args)
+      vim.fn["UltiSnips#Anon"](args.body)
+    end
+  },
+  mapping = {
+    ['<C-b>'] = cmp.mapping.scroll_docs(-4),
+    ['<C-f>'] = cmp.mapping.scroll_docs(4),
+    ['<C-Space>'] = cmp.mapping.complete(),
+    ['<C-x>'] = cmp.mapping.complete(),
+    ['<C-y>'] = cmp.config.disable,
+    ['<C-e>'] = cmp.mapping({
+        i = cmp.mapping.abort(),
+        c = cmp.mapping.close(),
+      }),
+    ['<CR>'] = cmp.mapping({
+      i = cmp.mapping.confirm({ select = true }),
+      c = cmp.mapping.confirm({ select = false }),
+    }),
+  },
+  sources = {
+    { name = 'nvim_lsp' },
+    { name = 'path' },
+    { name = 'ultisnips' },
+    { name = 'buffer', keyword_length = 5 },
+    { name = 'npm', keyword_length = 4 },
+  },
+  formatting = {
+    format = require('lspkind').cmp_format {
+      with_text = true,
+      menu = {
+        buffer = "[buf]",
+        nvim_lsp = "[LSP]",
+        path = "[path]",
+        luasnip = "[snip]"
+      }
+    }
+  },
+  experimental = {
+    native_menu = false,
+    ghost_text = true
+  }
+})