[Analyze prefixes of all dependencies]

anal-pkg.js

const glob = require("glob");
const fs = require("fs-extra");

async function main() {
  const pkgFilePaths = glob.sync("./packages/*/package.json");

  console.log(pkgFilePaths);

  const prefixes = new Set();

  const pkgJsons = await Promise.all(pkgFilePaths.map((p) => fs.readJson(p)));

  for (let pkgJson of pkgJsons) {
    // console.log(pkgJson);
    const allDependencies = [
      ...Object.keys(pkgJson.dependencies ?? {}),
      ...Object.keys(pkgJson.devDependencies ?? {}),
    ];
    const dependenciesWithPrefix = allDependencies.filter((d) =>
      d.startsWith("@")
    );

    dependenciesWithPrefix.forEach((d) => {
      const [,prefix] = /^(@.*)\//.exec(d);
      prefixes.add(prefix)
    });
  }

  console.log(prefixes);
}

main().catch((e) => {
  console.error(e);
  process.exit(1);
});