mirall-cli / node_modules / resource-on-exit / index.js

const resources = new Map()

exports.add = function(resource, teardown) {
  resources.set(resource, teardown)
}

exports.remove = function(resource) {
  resources.delete(resource)
}

if (global.Bare) global.Bare.on('exit', run)
else global.process.on('exit', run)

function run() {
  for (const [resource, teardown] of resources) {
    teardown(resource)
  }
}