Using Puppeteer 19 on Google Cloud Functions

I have a Google Cloud Function which uses Puppeteer to convert HTML documents to PDF. I recently tried to upgrade Puppeteer to version 19. It worked fine locally, but not when deployed to Google Cloud:

Error: Could not find Chromium (rev. 1069273). This can occur if either
1. you did not perform an installation before running the script (e.g. `npm install`) or
2. your cache path is incorrectly configured (which is: /root/.cache/puppeteer).
For (2), check out our guide on configuring puppeteer at https://pptr.dev/guides/configuration.

The fix was relatively straightforward:

First, add a new .puppeteerrc.cjs file at the root of the project (documented here):

const { join } = require("path");

/**
 * @type {import("puppeteer").Configuration}
 */
module.exports = {
  cacheDirectory: join(__dirname, ".cache", "puppeteer"),
};

Second, add .cache to your .gitignore file:

# Puppeteer cache
.cache

This fixed everything for my first deployment, but it broke again on subsequent deployments. This lead to Step 3: Add a new gcp-build item to the scripts object in your project’s package.json (documented here). This re-installs puppeteer after every deployment:

"scripts": {
  "gcp-build": "node node_modules/puppeteer/install.js",
  /* etc */
}

(Thanks to Justus Bl├╝mer for writing up the last part).