removed MS excel support, moved to plugin

packages/api/src/shell/requirePlugin.js

@@ -0,0 +1,29 @@
+const path = require('path');
+const { pluginsdir } = require('../utility/directories');
+
+const loadedPlugins = {};
+
+const dbgateEnv = {
+  dbgateApi: null,
+};
+
+function requirePlugin(packageName, requiredPlugin = null) {
+  if (!packageName) throw new Error('Missing packageName in plugin');
+  if (loadedPlugins[packageName]) return loadedPlugins[packageName];
+
+  if (requiredPlugin == null) {
+    console.log('Loading module', packageName);
+    const module = require(path.join(pluginsdir(), packageName, 'lib', 'backend.js'));
+    requiredPlugin = module.__esModule ? module.default : module;
+  }
+  loadedPlugins[packageName] = requiredPlugin;
+  if (requiredPlugin.initialize) requiredPlugin.initialize(dbgateEnv);
+
+  return requiredPlugin;
+}
+
+requirePlugin.initialize = (value) => {
+  dbgateEnv.dbgateApi = value;
+};
+
+module.exports = requirePlugin;