docs: modernize patterns in subset of samples (#660)

packages/google-cloud-node/samples/.eslintrc.yml

@@ -1,3 +1,4 @@
 ---
 rules:
   no-console: off
+  node/no-unsupported-features/node-builtins: off

packages/google-cloud-node/samples/package.json

@@ -2,11 +2,15 @@
   "name": "nodejs-docs-samples-speech",
   "private": true,
   "license": "Apache-2.0",
-  "author": "Google Inc.",
+  "author": "Google LLC",
   "repository": "googleapis/nodejs-speech",
   "engines": {
-    "node": ">=8"
+    "node": ">=10.17.0"
   },
+  "files": [
+    "*.js",
+    "resources/"
+  ],
   "scripts": {
     "test": "c8 mocha system-test --timeout 600000"
   },

packages/google-cloud-node/samples/quickstart.js

@@ -14,42 +14,51 @@
 
 'use strict';
 
-// [START speech_quickstart]
-async function main() {
+function main() {
+  // [START speech_quickstart]
   // Imports the Google Cloud client library
   const speech = require('@google-cloud/speech');
-  const fs = require('fs');
+  const fs = require('fs').promises;
 
   // Creates a client
   const client = new speech.SpeechClient();
 
-  // The name of the audio file to transcribe
-  const fileName = './resources/audio.raw';
-
-  // Reads a local audio file and converts it to base64
-  const file = fs.readFileSync(fileName);
-  const audioBytes = file.toString('base64');
-
-  // The audio file's encoding, sample rate in hertz, and BCP-47 language code
-  const audio = {
-    content: audioBytes,
-  };
-  const config = {
-    encoding: 'LINEAR16',
-    sampleRateHertz: 16000,
-    languageCode: 'en-US',
-  };
-  const request = {
-    audio: audio,
-    config: config,
-  };
-
-  // Detects speech in the audio file
-  const [response] = await client.recognize(request);
-  const transcription = response.results
-    .map(result => result.alternatives[0].transcript)
-    .join('\n');
-  console.log(`Transcription: ${transcription}`);
+  async function quickstart() {
+    // The name of the audio file to transcribe
+    const fileName = './resources/audio.raw';
+
+    // Reads a local audio file and converts it to base64
+    const file = await fs.readFile(fileName);
+    const audioBytes = file.toString('base64');
+
+    // The audio file's encoding, sample rate in hertz, and BCP-47 language code
+    const audio = {
+      content: audioBytes,
+    };
+    const config = {
+      encoding: 'LINEAR16',
+      sampleRateHertz: 16000,
+      languageCode: 'en-US',
+    };
+    const request = {
+      audio: audio,
+      config: config,
+    };
+
+    // Detects speech in the audio file
+    const [response] = await client.recognize(request);
+    const transcription = response.results
+      .map(result => result.alternatives[0].transcript)
+      .join('\n');
+    console.log(`Transcription: ${transcription}`);
+  }
+  quickstart();
+  // [END speech_quickstart]
 }
-main().catch(console.error);
-// [END speech_quickstart]
+
+process.on('unhandledRejection', err => {
+  console.error(err.message);
+  process.exitCode = 1;
+});
+
+main(...process.argv.slice(2));