Add ability to disable script runner calls

With script runner disabled, all critical scripts would fail

compose/internal/service/script_runner.go

@@ -49,13 +49,18 @@ type (
 )
 
 // @todo move to opt so all services can use it
-func ScriptRunner(c options.ScriptRunnerOpt) (*scriptRunner, error) {
-	var svc = &scriptRunner{
+func ScriptRunner(c options.ScriptRunnerOpt) (svc *scriptRunner, err error) {
+	svc = &scriptRunner{
 		c:          c,
 		logger:     DefaultLogger.Named("script-runner"),
 		jwtEncoder: auth.DefaultJwtHandler,
 	}
 
+	if !c.Enabled {
+		// Do not connect when script runner is not enabled
+		return
+	}
+
 	return svc, svc.connect()
 }
 
@@ -128,6 +133,20 @@ func (svc scriptRunner) Record(ctx context.Context, s Runnable, ns *types.Namesp
 		return nil, errors.New("module not provided")
 	}
 
+	if !svc.c.Enabled {
+		if s.IsCritical() {
+			// Oh dear, we are in quite a pickle:
+			// Script runner is disabled but we have critical script to run
+			return nil, errors.New("script runner disabled")
+		}
+
+		// Log this
+		svc.logger.Debug("executing script", zap.Any("record", r))
+
+		// and pretend like nothing happened
+		return r, nil
+	}
+
 	svc.logger.Debug("executing script", zap.Any("record", r))
 
 	ctx, cancelFn := context.WithTimeout(ctx, time.Second*5)

pkg/cli/options/script_runner.go

@@ -6,6 +6,7 @@ import (
 
 type (
 	ScriptRunnerOpt struct {
+		Enabled         bool          `env:"SCRIPT_RUNNER_ENABLED"`
 		Addr            string        `env:"SCRIPT_RUNNER_ADDR"`
 		MaxBackoffDelay time.Duration `env:"SCRIPT_RUNNER_MAX_BACKOFF_DELAY"`
 		Log             bool          `env:"SCRIPT_RUNNER_LOG"`
@@ -14,6 +15,7 @@ type (
 
 func ScriptRunner(pfix string) (o *ScriptRunnerOpt) {
 	o = &ScriptRunnerOpt{
+		Enabled:         false,
 		Addr:            "corredor:80",
 		MaxBackoffDelay: time.Minute,
 		Log:             false,