deterministic ordering of output.

cmd/policygen/config.go

@@ -173,6 +173,7 @@ func LoadConfig(file string) (*Config, error) {
 	dec := yaml.NewDecoder(bytes.NewReader(yamlFile),
 		yaml.UseJSONUnmarshaler(),
 		yaml.DisallowUnknownField(),
+		yaml.UseOrderedMap(),
 	)
 	var config Config
 	err = dec.Decode(&config)

cmd/policygen/generator.go

@@ -72,12 +72,10 @@ func Generate(writer io.Writer, generator Generator, config *Config) error {
 	}
 
 	// Loop over all applications and gather the ingress and egress for each application
-	var applications = make(map[string]*Application)
 	var ingresses = make(map[string]*Ingress)
 	var egresses = make(map[string]*Egress)
 	for _, ns := range config.Namespaces {
 		for _, app := range ns.Applications {
-			applications[app.Name] = app
 			if ingresses[app.Name] == nil {
 				ingresses[app.Name] = &Ingress{}
 			}
@@ -149,15 +147,18 @@ func Generate(writer io.Writer, generator Generator, config *Config) error {
 	}
 
 	// loop over all apps and configure them
-	for app, ingress := range ingresses {
+	for _, ns := range config.Namespaces {
-		egress := egresses[app]
+		for _, app := range ns.Applications {
+			ingress := ingresses[app.Name]
+			egress := egresses[app.Name]
 			if !ingress.Empty() || !egress.Empty() {
-			err := generator.GenerateCommunicationRule(writer, applications[app], ingress, egress)
+				err := generator.GenerateCommunicationRule(writer, app, ingress, egress)
 				if err != nil {
 					return err
 				}
 			}
 		}
+	}
 
 	return nil
 }