config-plugins/scripts/update-dependabot-config.ts

#!/usr/bin/env ts-node
import * as fs from "fs/promises";
import { sync as globSync } from "glob";
import * as yaml from "js-yaml";
import * as path from "path";

/**
 * @returns a list of file paths for each package in the packages folder, relative to the root.
 * @example
 * ```
 * ['packages/react-native-callkeep', 'packages/react-native-camera', ...]
 * ```
 */
function getAllPackageJsonFiles(root: string): string[] {
  const packageJsonFiles = globSync("packages/*/package.json", {
    cwd: root,
  });

  return packageJsonFiles.map((pkgJsonFilePath) =>
    path.dirname(pkgJsonFilePath)
  );
}

(async () => {
  const root = path.join(__dirname, "../");
  const filePaths = getAllPackageJsonFiles(root);

  const config: {
    version: number;
    updates: {
      "package-ecosystem": string;
      directory: string;
      schedule: { interval?: string; time?: string; timezone?: string };
    }[];
  } = {
    version: 2,
    updates: [],
  };

  for (const filePath of filePaths.sort()) {
    config.updates.push({
      "package-ecosystem": "npm",
      directory: filePath,
      // Default for every package is to run at the beginning of every Expo work day.
      schedule: {
        interval: "daily",
        time: "09:00",
        // Expo is based out of California
        timezone: "America/Los_Angeles",
      },
    });
  }

  const outputFilePath = path.join(root, ".github/dependabot.yml");

  const results = yaml.dump(config);

  console.log("Results:\n", results);
  console.log("");
  console.log("Writing to:", outputFilePath);
  await fs.writeFile(
    outputFilePath,
    [
      "# AUTO GENERATED:",
      "# This file was generated by running the following in the root directory:",
      "#",
      "# yarn update-dependabot-config",
      "",
      results,
    ].join("\n")
  );
})();