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28 changes: 17 additions & 11 deletions packages/datadog-instrumentations/src/helpers/hook.js
Original file line number Diff line number Diff line change
Expand Up @@ -26,31 +26,37 @@ function Hook (modules, hookOptions, onrequire) {
const parts = [moduleBaseDir, moduleName].filter(Boolean)
const filename = path.join(...parts)

if (this._patched[filename] && patched.has(moduleExports)) {
return patched.get(moduleExports)
}

let defaultWrapResult

const wrappedOnrequire = (moduleExports, ...args) => {
if (this._patched[filename] && patched.has(moduleExports)) {
return patched.get(moduleExports)
}

const result = onrequire(moduleExports, ...args)
if (result && (typeof result === 'object' || typeof result === 'function')) {
patched.set(moduleExports, result)
patched.set(result, result)
}

return result
}

if (
isIitm &&
moduleExports.default &&
(typeof moduleExports.default === 'object' ||
typeof moduleExports.default === 'function')
) {
defaultWrapResult = onrequire(moduleExports.default, moduleName, moduleBaseDir, moduleVersion, isIitm)
defaultWrapResult = wrappedOnrequire(moduleExports.default, moduleName, moduleBaseDir, moduleVersion, isIitm)
}

const newExports = onrequire(moduleExports, moduleName, moduleBaseDir, moduleVersion, isIitm)
const newExports = wrappedOnrequire(moduleExports, moduleName, moduleBaseDir, moduleVersion, isIitm)

if (defaultWrapResult) newExports.default = defaultWrapResult

this._patched[filename] = true
if (newExports &&
(typeof newExports === 'object' ||
typeof newExports === 'function')) {
patched.set(moduleExports, newExports)
}

return newExports
}

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