enforce updatable apexes to set min_sdk_version

updatable APEXes should set min_sdk_version as well.

Bug: 152655956
Test: m
Merged-In: I8192086eb89fa958dd8ff1b731e43e24bf217ce2
Change-Id: I8192086eb89fa958dd8ff1b731e43e24bf217ce2
(cherry picked from commit 548640b55f)

apex/apex.go

@@ -1111,8 +1111,10 @@ type apexBundleProperties struct {
 	IsCoverageVariant bool `blueprint:"mutated"`
 
 	// Whether this APEX is considered updatable or not. When set to true, this will enforce additional
-	// rules for making sure that the APEX is truely updatable. This will also disable the size optimizations
-	// like symlinking to the system libs. Default is false.
+	// rules for making sure that the APEX is truly updatable.
+	// - To be updatable, min_sdk_version should be set as well
+	// This will also disable the size optimizations like symlinking to the system libs.
+	// Default is false.
 	Updatable *bool
 
 	// The minimum SDK version that this apex must be compatible with.
@@ -1885,6 +1887,14 @@ func (a *apexBundle) checkApexAvailability(ctx android.ModuleContext) {
 	})
 }
 
+func (a *apexBundle) checkUpdatable(ctx android.ModuleContext) {
+	if proptools.Bool(a.properties.Updatable) {
+		if String(a.properties.Min_sdk_version) == "" {
+			ctx.PropertyErrorf("updatable", "updatable APEXes should set min_sdk_version as well")
+		}
+	}
+}
+
 // Collects the list of module names that directly or indirectly contributes to the payload of this APEX
 func (a *apexBundle) collectDepsInfo(ctx android.ModuleContext) {
 	a.depInfos = make(map[string]depInfo)
@@ -1950,6 +1960,7 @@ func (a *apexBundle) GenerateAndroidBuildActions(ctx android.ModuleContext) {
 	}
 
 	a.checkApexAvailability(ctx)
+	a.checkUpdatable(ctx)
 
 	a.collectDepsInfo(ctx)
 

apex/apex_test.go

@@ -4017,6 +4017,7 @@ func TestSymlinksFromApexToSystem(t *testing.T) {
 			native_shared_libs: ["mylib"],
 			java_libs: ["myjar"],
 			updatable: true,
+			min_sdk_version: "current",
 		}
 
 		apex_key {
@@ -4242,6 +4243,22 @@ func testNoUpdatableJarsInBootImage(t *testing.T, errmsg, bp string, transformDe
 	}
 }
 
+func TestUpdatable_should_set_min_sdk_version(t *testing.T) {
+	testApexError(t, `"myapex" .*: updatable: updatable APEXes should set min_sdk_version`, `
+		apex {
+			name: "myapex",
+			key: "myapex.key",
+			updatable: true,
+		}
+
+		apex_key {
+			name: "myapex.key",
+			public_key: "testkey.avbpubkey",
+			private_key: "testkey.pem",
+		}
+	`)
+}
+
 func TestNoUpdatableJarsInBootImage(t *testing.T) {
 	bp := `
 		java_library {