Migrate to lua

configs/nvim/lua/helpers.lua

@@ -0,0 +1,40 @@
+local cmd = vim.cmd                     -- to execute Vim commands e.g. cmd('pwd')
+local fn = vim.fn                       -- to call Vim functions e.g. fn.bufnr()
+local g = vim.g                         -- a table to access global variables
+local opt = vim.opt                     -- to set options
+
+local function map(mode, lhs, rhs, opts)
+  local options = {noremap = true}
+  if opts then options = vim.tbl_extend('force', options, opts) end
+  vim.api.nvim_set_keymap(mode, lhs, rhs, options)
+end
+
+local function dump(...)
+    local objects = vim.tbl_map(vim.inspect, {...})
+    print(unpack(objects))
+end
+
+local function call_with_helpers(user_func)
+    setfenv(user_func,
+        vim.tbl_extend('force', getfenv(), get_helpers()))
+    local status, err = pcall(user_func)
+    if not status then
+      print('Failure running setup function: ' .. vim.inspect(err))
+    else
+        return status
+    end
+end
+
+function get_helpers()
+    return {
+        map = map,
+        cmd = cmd,
+        fn = fn,
+        g = g,
+        opt = opt,
+        dump = dump,
+        call_with_helpers = call_with_helpers,
+    }
+end
+
+return get_helpers()