Dependencies usage

index.js

const { readFileSync } = require("fs");

const depsCount = {};
function processDeps(deps) {
  deps !== undefined &&
    Object.keys(deps).forEach(dep => {
      depsCount[dep] = 1 + (depsCount[dep] || 0);
    });
}

process.argv.slice(2).forEach(pkgFile => {
  try {
    const pkg = JSON.parse(readFileSync(pkgFile));
    processDeps(pkg.dependencies);
    // processDeps(pkg.devDependencies);
    processDeps(pkg.optionalDependencies);
  } catch (_) {}
});

Object.entries(depsCount)
  .sort((a, b) => b[1] - a[1])
  // .filter(dep => dep[1] > 1)
  // .slice(0, 50)
  .forEach(([name, count]) => {
    console.log("%s (%d)", name, count);
  });