Replace FutureApiLevel with an ApiLevel.

Keeping the int constant around for now as FutureApiLevelInt because
it's still useful in places that haven't adopted ApiLevel yet for
testing if their non-ApiLevel API level is current or not.

Test: treehugger
Bug: http://b/154667674
Change-Id: I47a7012703f41fdeb56f91edf9c83afa93042deb

android/api_levels.go

@@ -51,7 +51,7 @@ type ApiLevel struct {
 
 func (this ApiLevel) FinalOrFutureInt() int {
 	if this.IsPreview() {
-		return FutureApiLevel
+		return FutureApiLevelInt
 	} else {
 		return this.number
 	}
@@ -127,13 +127,6 @@ func uncheckedFinalApiLevel(num int) ApiLevel {
 	}
 }
 
-// TODO: Merge with FutureApiLevel
-var CurrentApiLevel = ApiLevel{
-	value:     "current",
-	number:    10000,
-	isPreview: true,
-}
-
 var NoneApiLevel = ApiLevel{
 	value: "(no version)",
 	// Not 0 because we don't want this to compare equal with the first preview.
@@ -188,7 +181,7 @@ func ApiLevelFromUser(ctx EarlyModuleContext, raw string) (ApiLevel, error) {
 	}
 
 	if raw == "current" {
-		return CurrentApiLevel, nil
+		return FutureApiLevel, nil
 	}
 
 	for _, preview := range ctx.Config().PreviewApiLevels() {

android/config.go

@@ -37,7 +37,13 @@ var Bool = proptools.Bool
 var String = proptools.String
 var StringDefault = proptools.StringDefault
 
-const FutureApiLevel = 10000
+const FutureApiLevelInt = 10000
+
+var FutureApiLevel = ApiLevel{
+	value:     "current",
+	number:    FutureApiLevelInt,
+	isPreview: true,
+}
 
 // The configuration file name
 const configFileName = "soong.config"
@@ -672,11 +678,12 @@ func (c *config) AllSupportedApiLevels() []ApiLevel {
 	return append(levels, c.PreviewApiLevels()...)
 }
 
+// TODO: Merge this and DefaultAppTargetSdk to just return an ApiLevel.
 func (c *config) DefaultAppTargetSdkInt() int {
 	if Bool(c.productVariables.Platform_sdk_final) {
 		return c.PlatformSdkVersionInt()
 	} else {
-		return FutureApiLevel
+		return FutureApiLevelInt
 	}
 }
 

apex/apex.go

@@ -1955,7 +1955,7 @@ func (a *apexBundle) WalkPayloadDeps(ctx android.ModuleContext, do android.Paylo
 func (a *apexBundle) minSdkVersion(ctx android.BaseModuleContext) android.ApiLevel {
 	ver := proptools.String(a.properties.Min_sdk_version)
 	if ver == "" {
-		return android.CurrentApiLevel
+		return android.FutureApiLevel
 	}
 	apiLevel, err := android.ApiLevelFromUser(ctx, ver)
 	if err != nil {
@@ -1964,7 +1964,7 @@ func (a *apexBundle) minSdkVersion(ctx android.BaseModuleContext) android.ApiLev
 	}
 	if apiLevel.IsPreview() {
 		// All codenames should build against "current".
-		return android.CurrentApiLevel
+		return android.FutureApiLevel
 	}
 	return apiLevel
 }

cc/cc.go

@@ -2291,7 +2291,7 @@ func (c *Module) depsToPaths(ctx android.ModuleContext) PathDeps {
 	}
 
 	// For the dependency from platform to apex, use the latest stubs
-	c.apexSdkVersion = android.CurrentApiLevel
+	c.apexSdkVersion = android.FutureApiLevel
 	if !c.IsForPlatform() {
 		c.apexSdkVersion = c.ApexProperties.Info.MinSdkVersion(ctx)
 	}
@@ -2300,7 +2300,7 @@ func (c *Module) depsToPaths(ctx android.ModuleContext) PathDeps {
 		// In hwasan build, we override apexSdkVersion to the FutureApiLevel(10000)
 		// so that even Q(29/Android10) apexes could use the dynamic unwinder by linking the newer stubs(e.g libc(R+)).
 		// (b/144430859)
-		c.apexSdkVersion = android.CurrentApiLevel
+		c.apexSdkVersion = android.FutureApiLevel
 	}
 
 	ctx.VisitDirectDeps(func(dep android.Module) {

cc/compiler.go

@@ -392,7 +392,7 @@ func (compiler *baseCompiler) compilerFlags(ctx ModuleContext, flags Flags, deps
 	if ctx.Os().Class == android.Device {
 		version := ctx.sdkVersion()
 		if version == "" || version == "current" {
-			target += strconv.Itoa(android.FutureApiLevel)
+			target += strconv.Itoa(android.FutureApiLevelInt)
 		} else {
 			target += version
 		}

cc/ndk_library.go

@@ -118,8 +118,8 @@ func generatePerApiVariants(ctx android.BottomUpMutatorContext, m *Module,
 			versionStrs = append(versionStrs, version.String())
 		}
 	}
-	versions = append(versions, android.CurrentApiLevel)
-	versionStrs = append(versionStrs, android.CurrentApiLevel.String())
+	versions = append(versions, android.FutureApiLevel)
+	versionStrs = append(versionStrs, android.FutureApiLevel.String())
 
 	modules := ctx.CreateVariations(versionStrs...)
 	for i, module := range modules {

java/sdk.go

@@ -107,7 +107,7 @@ type sdkVersion int
 
 const (
 	// special version number for a not-yet-frozen SDK
-	sdkVersionCurrent sdkVersion = sdkVersion(android.FutureApiLevel)
+	sdkVersionCurrent sdkVersion = sdkVersion(android.FutureApiLevelInt)
 	// special version number to be used for SDK specs where version number doesn't
 	// make sense, e.g. "none", "", etc.
 	sdkVersionNone sdkVersion = sdkVersion(0)