refactor: convert more files to typescript (#16820)

lib/common/reset-search-paths.ts

@@ -0,0 +1,44 @@
+import * as path from 'path'
+
+const Module = require('module')
+
+// Clear Node's global search paths.
+Module.globalPaths.length = 0
+
+// Clear current and parent(init.js)'s search paths.
+module.paths = []
+module.parent!.paths = []
+
+// Prevent Node from adding paths outside this app to search paths.
+const resourcesPathWithTrailingSlash = process.resourcesPath + path.sep
+const originalNodeModulePaths = Module._nodeModulePaths
+Module._nodeModulePaths = function (from: string) {
+  const paths: string[] = originalNodeModulePaths(from)
+  const fromPath = path.resolve(from) + path.sep
+  // If "from" is outside the app then we do nothing.
+  if (fromPath.startsWith(resourcesPathWithTrailingSlash)) {
+    return paths.filter(function (candidate) {
+      return candidate.startsWith(resourcesPathWithTrailingSlash)
+    })
+  } else {
+    return paths
+  }
+}
+
+const BASE_INTERNAL_PATH = path.resolve(__dirname, '..')
+const INTERNAL_MODULE_PREFIX = '@electron/internal/'
+
+// Patch Module._resolveFilename to always require the Electron API when
+// require('electron') is done.
+const electronPath = path.join(__dirname, '..', process.type!, 'api', 'exports', 'electron.js')
+const originalResolveFilename = Module._resolveFilename
+Module._resolveFilename = function (request: string, parent: NodeModule, isMain: boolean) {
+  if (request === 'electron') {
+    return electronPath
+  } else if (request.startsWith(INTERNAL_MODULE_PREFIX) && request.length > INTERNAL_MODULE_PREFIX.length) {
+    const slicedRequest = request.slice(INTERNAL_MODULE_PREFIX.length)
+    return path.resolve(BASE_INTERNAL_PATH, `${slicedRequest}${slicedRequest.endsWith('.js') ? '' : '.js'}`)
+  } else {
+    return originalResolveFilename(request, parent, isMain)
+  }
+}