54 lines
802 B
Go
54 lines
802 B
Go
package detect_platform
|
|
|
|
import (
|
|
"context"
|
|
"net/http"
|
|
"sync"
|
|
"time"
|
|
)
|
|
|
|
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{
|
|
detectOpenStack,
|
|
detectContainer,
|
|
}
|
|
|
|
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 ""
|
|
}
|