mig packer to lazy and archive

Signed-off-by: d0zingcat <leewtang@gmail.com>

nvim/lua/legacy/nvim_cmp.lua

@@ -0,0 +1,45 @@
+local fn = vim.fn
+
+-- nvim-cmp
+local cmp = require('cmp')
+cmp.setup({
+    snippet = {
+        expand = function(args)
+            fn['vsnip#anonymous'](args.body)
+        end,
+    },
+    formatting = {
+        format = function(entry, vim_item)
+            -- set a name for each source
+            vim_item.menu = ({
+                buffer = '[Buf]',
+                nvim_lsp = '[LSP]',
+                luasnip = '[Snip]',
+                nvim_lua = '[Lua]',
+                latex_symbols = '[Latex]',
+            })[entry.source.name]
+            return vim_item
+        end,
+    },
+    mapping = cmp.mapping.preset.insert({
+        ['<C-b>'] = cmp.mapping.scroll_docs(-4),
+        ['<C-f>'] = cmp.mapping.scroll_docs(4),
+        -- ['<C-e>'] = cmp.mapping.complete(),
+        --["<C-e>"] = cmp.mapping.close(),
+        ['<C-e>'] = function(fallback)
+            fallback()
+        end,
+        -- ['<CR>'] = cmp.mapping.confirm({
+        --     behavior = cmp.ConfirmBehavior.Replace,
+        --     select = true,
+        -- }),
+        ['<C-y>'] = cmp.mapping.confirm({ select = true }),
+        -- ['<C-n>'] = cmp.mapping.select_next_item(),
+        -- ['<C-p>'] = cmp.mapping.select_prev_item(),
+        --},
+    }),
+    sources = {
+        { name = 'nvim_lsp' },
+        { name = 'buffer' },
+    },
+})