add hw2

node_modules/pino/lib/transport-stream.js

@@ -0,0 +1,50 @@
+'use strict'
+
+const { realImport, realRequire } = require('real-require')
+
+module.exports = loadTransportStreamBuilder
+
+/**
+ * Loads & returns a function to build transport streams
+ * @param {string} target
+ * @returns {function(object): Promise<import('stream').Writable>}
+ * @throws {Error} In case the target module does not export a function
+ */
+async function loadTransportStreamBuilder (target) {
+  let fn
+  try {
+    const toLoad = 'file://' + target
+
+    if (toLoad.endsWith('.ts') || toLoad.endsWith('.cts')) {
+      // TODO: add support for the TSM modules loader ( https://github.com/lukeed/tsm ).
+      if (process[Symbol.for('ts-node.register.instance')]) {
+        realRequire('ts-node/register')
+      } else if (process.env && process.env.TS_NODE_DEV) {
+        realRequire('ts-node-dev')
+      }
+      // TODO: Support ES imports once tsc, tap & ts-node provide better compatibility guarantees.
+      fn = realRequire(decodeURIComponent(target))
+    } else {
+      fn = (await realImport(toLoad))
+    }
+  } catch (error) {
+    // See this PR for details: https://github.com/pinojs/thread-stream/pull/34
+    if ((error.code === 'ENOTDIR' || error.code === 'ERR_MODULE_NOT_FOUND')) {
+      fn = realRequire(target)
+    } else if (error.code === undefined) {
+      // When bundled with pkg, an undefined error is thrown when called with realImport
+      fn = realRequire(decodeURIComponent(target))
+    } else {
+      throw error
+    }
+  }
+
+  // Depending on how the default export is performed, and on how the code is
+  // transpiled, we may find cases of two nested "default" objects.
+  // See https://github.com/pinojs/pino/issues/1243#issuecomment-982774762
+  if (typeof fn === 'object') fn = fn.default
+  if (typeof fn === 'object') fn = fn.default
+  if (typeof fn !== 'function') throw Error('exported worker is not a function')
+
+  return fn
+}