package detect_cloud import ( "context" "net/http" "sync" "time" ) /* This packages is inspired by the work of the original author (https://github.com/perlogix), but it has been modified to fit the needs of the project. Original project: https://github.com/perlogix/libdetectcloud */ var hc = &http.Client{Timeout: 300 * time.Millisecond} func Detect(ctx context.Context) string { subCtx, cancel := context.WithCancel(context.Background()) defer cancel() funcs := []func(context.Context) string{ detectAlibabaCloud, detectAWS, detectAzure, detectDigitalOcean, detectGCP, detectOracle, detectIBMCloud, detectSoftlayer, detectVultr, } results := make(chan string, len(funcs)) var wg sync.WaitGroup for _, fn := range funcs { wg.Add(1) go func(f func(context.Context) string) { defer wg.Done() select { case <-subCtx.Done(): return default: if result := f(ctx); result != "" { results <- result cancel() } } }(fn) } go func() { wg.Wait() close(results) }() for result := range results { if result != "" { return result } } return "" }