Merge "Soong: Add synopsis to soong_namespace module."

am: 39302bbcb9

Change-Id: Ie01144aac23f2c62f5a6f5b275395ba5cd282fc5

android/namespace.go

@@ -355,15 +355,19 @@ func NewNamespace(path string) *Namespace {
 
 var _ blueprint.Namespace = (*Namespace)(nil)
 
+type namespaceProperties struct {
+	// a list of namespaces that contain modules that will be referenced
+	// by modules in this namespace.
+	Imports []string `android:"path"`
+}
+
 type NamespaceModule struct {
 	ModuleBase
 
 	namespace *Namespace
 	resolver  *NameResolver
 
-	properties struct {
-		Imports []string
-	}
+	properties namespaceProperties
 }
 
 func (n *NamespaceModule) GenerateAndroidBuildActions(ctx ModuleContext) {
@@ -376,6 +380,16 @@ func (n *NamespaceModule) Name() (name string) {
 	return *n.nameProperties.Name
 }
 
+// soong_namespace provides a scope to modules in an Android.bp file to prevent
+// module name conflicts with other defined modules in different Android.bp
+// files. Once soong_namespace has been defined in an Android.bp file, the
+// namespacing is applied to all modules that follow the soong_namespace in
+// the current Android.bp file, as well as modules defined in Android.bp files
+// in subdirectories. An Android.bp file in a subdirectory can define its own
+// soong_namespace which is applied to all its modules and as well as modules
+// defined in subdirectories Android.bp files. Modules in a soong_namespace are
+// visible to Make by listing the namespace path in PRODUCT_SOONG_NAMESPACES
+// make variable in a makefile.
 func NamespaceFactory() Module {
 	module := &NamespaceModule{}