pnpm/src/api/storePrune.ts

import {StoreController} from 'package-store'
import {streamParser} from '@pnpm/logger'
import {ReporterFunction} from '../types'

export default async function (
  opts: {
    reporter?: ReporterFunction,
    storeController: StoreController,
  },
) {
  const reporter = opts && opts.reporter
  if (reporter) {
    streamParser.on('data', reporter)
  }
  await opts.storeController.prune()
  await opts.storeController.saveState()
  await opts.storeController.close()

  if (reporter) {
    streamParser.removeListener('data', reporter)
  }
}