Nuxt/packages/utils/src/cjs.js

export function clearRequireCache(id) {
  const entry = require.cache[id]
  if (!entry || id.includes('node_modules')) {
    return
  }

  if (entry.parent) {
    const i = entry.parent.children.findIndex(e => e.id === id)
    if (i > -1) {
      entry.parent.children.splice(i, 1)
    }
  }

  for (const child of entry.children) {
    clearRequireCache(child.id)
  }

  delete require.cache[id]
}

export function scanRequireTree(id, files = new Set()) {
  const entry = require.cache[id]
  if (!entry || id.includes('node_modules') || files.has(id)) {
    return files
  }

  files.add(entry.id)

  for (const child of entry.children) {
    scanRequireTree(child.id, files)
  }

  return files
}