llamacc: add option to always fallback to local build on error.

Workaround for nelhage#69

Signed-off-by: Quentin Casasnovas <[email protected]>

cmd/llamacc/config.go

@@ -26,6 +26,7 @@ type Config struct {
 	FullPreprocess  bool
 	Function        string
 	LocalPreprocess bool
+	LocalFallback	bool
 	BuildID         string
 
 	// FilteredWarnings is a list of warnings that we should always filter
@@ -102,6 +103,8 @@ func ParseConfig(env []string) Config {
 			out.LocalCC = val
 		case "LOCAL_CXX":
 			out.LocalCXX = val
+		case "LOCAL_FALLBACK":
+			out.LocalFallback = BoolConfigTrue(val)
 		case "FILTER_WARNINGS":
 			out.FilteredWarnings = StringArrayConfig(val)
 		default:

cmd/llamacc/main.go

@@ -296,7 +296,9 @@ func main() {
 			if ex, ok := err.(*exec.ExitError); ok {
 				os.Exit(ex.ExitCode())
 			}
-			if strings.Contains(err.Error(), "timed out") {
+			if cfg.LocalFallback {
+				goto RetryLocal
+			} else if strings.Contains(err.Error(), "timed out") {
 				goto RetryLocal
 			} else {
 				fmt.Fprintf(os.Stderr, "Running llamacc: %s\n", err.Error())