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'use strict'
module.exports.disposer = disposer
function disposer (creatorFn, disposerFn, fn) {
const runDisposer = (resource, result, shouldThrow = false) => {
return disposerFn(resource)
.then(
// disposer resolved, do something with original fn's promise
() => {
if (shouldThrow)
throw result
return result
},
// Disposer fn failed, crash process
(err) => {
throw err
// Or process.exit?
})
}
return creatorFn
.then((resource) => {
// fn(resource) can throw, so wrap in a promise here
return Promise.resolve().then(() => fn(resource))
.then((result) => runDisposer(resource, result))
.catch((err) => runDisposer(resource, err, true))
})
}