feat(nvim): switch to cmp and add package-info

common/home/neovim/plugins/cmp.lua

@@ -0,0 +1,63 @@
+local has_words_before = function()
+    local line, col = unpack(vim.api.nvim_win_get_cursor(0));
+    return col ~= 0 and vim.api.nvim_buf_get_lines(0, line - 1, line, true)[1]:sub(col, col):match('%s') == nil;
+end;
+
+local feedkey = function(key, mode)
+    vim.api.nvim_feedkeys(vim.api.nvim_replace_termcodes(key, true, true, true), mode, true);
+end;
+
+local cmp = require('cmp');
+
+-- If you want insert `(` after select function or method item
+local cmp_autopairs = require('nvim-autopairs.completion.cmp')
+cmp.event:on(
+  'confirm_done',
+  cmp_autopairs.on_confirm_done()
+)
+
+cmp.setup({
+    sources = {
+        { name = 'nvim_lsp' },
+        { name = 'cmp_tabnine' },
+        { name = 'treesitter' },
+        { name = 'buffer' },
+        { name = 'path' },
+        { name = 'vsnip' },
+    },
+
+    snippet = {
+        expand = function(args)
+            vim.fn['vsnip#anonymous'](args.body);
+        end,
+    },
+
+    mapping = {
+        ['<CR>'] = cmp.mapping.confirm({ select = true }),
+        ['<Tab>'] = cmp.mapping(function(fallback)
+            if cmp.visible() then
+                cmp.select_next_item();
+            elseif vim.fn['vsnip#available'](1) == 1 then
+                feedkey('<Plug>(vsnip-expand-or-jump)', '');
+            elseif has_words_before() then
+                cmp.complete();
+            else
+                fallback();
+            end;
+        end, {
+            'i',
+            's',
+        }),
+
+        ['<S-Tab>'] = cmp.mapping(function()
+            if cmp.visible() then
+                cmp.select_prev_item();
+            elseif vim.fn['vsnip#jumpable'](-1) == 1 then
+                feedkey('<Plug>(vsnip-jump-prev)', '');
+            end;
+        end, {
+            'i',
+            's',
+        }),
+    },
+});