Remove pre singletons

They're no longer used.

Test: m nothing --no-skip-soong-tests
Change-Id: I6481381a2ac6bca4211c88173dd4275261123e86

context.go

@@ -84,7 +84,6 @@ type Context struct {
 	moduleGroups        []*moduleGroup
 	moduleInfo          map[Module]*moduleInfo
 	modulesSorted       []*moduleInfo
-	preSingletonInfo    []*singletonInfo
 	singletonInfo       []*singletonInfo
 	mutatorInfo         []*mutatorInfo
 	variantMutatorNames []string
@@ -594,29 +593,6 @@ func (c *Context) RegisterSingletonType(name string, factory SingletonFactory, p
 	})
 }
 
-// RegisterPreSingletonType registers a presingleton type that will be invoked to
-// generate build actions before any Blueprint files have been read.  Each registered
-// presingleton type is instantiated and invoked exactly once at the beginning of the
-// parse phase.  Each registered presingleton is invoked in registration order.
-//
-// The presingleton type names given here must be unique for the context.  The
-// factory function should be a named function so that its package and name can
-// be included in the generated Ninja file for debugging purposes.
-func (c *Context) RegisterPreSingletonType(name string, factory SingletonFactory) {
-	for _, s := range c.preSingletonInfo {
-		if s.name == name {
-			panic(fmt.Errorf("presingleton %q is already registered", name))
-		}
-	}
-
-	c.preSingletonInfo = append(c.preSingletonInfo, &singletonInfo{
-		factory:   factory,
-		singleton: factory(),
-		name:      name,
-		parallel:  false,
-	})
-}
-
 func (c *Context) SetNameInterface(i NameInterface) {
 	c.nameInterface = i
 }
@@ -1970,22 +1946,15 @@ func (c *Context) resolveDependencies(ctx context.Context, config interface{}) (
 
 		c.liveGlobals = newLiveTracker(c, config)
 
-		deps, errs = c.generateSingletonBuildActions(config, c.preSingletonInfo, c.liveGlobals)
-		if len(errs) > 0 {
-			return
-		}
-
 		errs = c.updateDependencies()
 		if len(errs) > 0 {
 			return
 		}
 
-		var mutatorDeps []string
+		deps, errs = c.runMutators(ctx, config)
-		mutatorDeps, errs = c.runMutators(ctx, config)
 		if len(errs) > 0 {
 			return
 		}
-		deps = append(deps, mutatorDeps...)
 
 		c.BeginEvent("clone_modules")
 		if !c.SkipCloneModulesAfterMutators {

module_ctx_test.go

@@ -556,16 +556,6 @@ func addNinjaDepsTestTopDownMutator(ctx TopDownMutatorContext) {
 	ctx.AddNinjaFileDeps("TopDownMutator")
 }
 
-type addNinjaDepsTestPreSingleton struct{}
-
-func addNinjaDepsTestPreSingletonFactory() Singleton {
-	return &addNinjaDepsTestPreSingleton{}
-}
-
-func (s *addNinjaDepsTestPreSingleton) GenerateBuildActions(ctx SingletonContext) {
-	ctx.AddNinjaFileDeps("PreSingleton")
-}
-
 type addNinjaDepsTestSingleton struct{}
 
 func addNinjaDepsTestSingletonFactory() Singleton {
@@ -589,7 +579,6 @@ func TestAddNinjaFileDeps(t *testing.T) {
 	ctx.RegisterModuleType("test", addNinjaDepsTestModuleFactory)
 	ctx.RegisterBottomUpMutator("testBottomUpMutator", addNinjaDepsTestBottomUpMutator)
 	ctx.RegisterTopDownMutator("testTopDownMutator", addNinjaDepsTestTopDownMutator)
-	ctx.RegisterPreSingletonType("testPreSingleton", addNinjaDepsTestPreSingletonFactory)
 	ctx.RegisterSingletonType("testSingleton", addNinjaDepsTestSingletonFactory, false)
 	parseDeps, errs := ctx.ParseBlueprintsFiles("Android.bp", nil)
 	if len(errs) > 0 {
@@ -622,7 +611,7 @@ func TestAddNinjaFileDeps(t *testing.T) {
 		t.Errorf("ParseBlueprintsFiles: wanted deps %q, got %q", w, g)
 	}
 
-	if g, w := resolveDeps, []string{"PreSingleton", "BottomUpMutator", "TopDownMutator"}; !reflect.DeepEqual(g, w) {
+	if g, w := resolveDeps, []string{"BottomUpMutator", "TopDownMutator"}; !reflect.DeepEqual(g, w) {
 		t.Errorf("ResolveDependencies: wanted deps %q, got %q", w, g)
 	}