async _findDiagnostics(filePath: string): Promise<?Array<ArcDiagnostic>> {
const blacklistedLinters: Array<string> =
(featureConfig.get('nuclide-arcanist.blacklistedLinters'): any);
const runningProcess = this._runningProcess.get(filePath);
if (runningProcess != null) {
// This will cause the previous lint run to resolve with `undefined`.
runningProcess.complete();
}
const arcService = getArcanistServiceByNuclideUri(filePath);
const subject = new Subject();
this._runningProcess.set(filePath, subject);
const subscription = arcService.findDiagnostics(filePath, blacklistedLinters)
.refCount()
.toArray()
.timeout((featureConfig.get('nuclide-arcanist.lintTimeout'): any))
.subscribe(subject);
return subject
.finally(() => {
subscription.unsubscribe();
this._runningProcess.delete(filePath);
})
.toPromise();
}