java_sdk_library: Make dex stub jars available for hiddenapi

The hidden API processing needs access to dex jars for the API stubs in
order to determine which dex members are part of an API surface. The
dex stubs used for the monolithic file are provided by normal
java_library modules for legacy reasons. However, the APEXes that
contribute to the bootclasspath, and so need to perform hidden API
processing, typically provide stubs created by a java_sdk_library.

This change adds support to java_sdk_library/_import to make the dex
stub jars available when requested, that involves:
1. Adding compile_dex property to java_sdk_library_import and
   propagating it down the the java_import modules for the stubs. That
   is already handled for java_sdk_library.
2. Propagating the java_sdk_library compile_dex property to the
   java_sdk_library_import in the generated snapshot.
3. Refactoring and wiring to make the dex stubs jar available to other
   parts of Soong.

Bug: 179354495
Test: m nothing
Change-Id: I5895d4f2ba0b684870862b9429b2364865e4afc6

1 files changed, 74 insertions, 0 deletions

diff --git a/sdk/java_sdk_test.go b/sdk/java_sdk_test.go
index 54916d8bb..601698121 100644
--- a/sdk/java_sdk_test.go
+++ b/sdk/java_sdk_test.go
@@ -1089,6 +1089,80 @@ sdk_snapshot {
 	)
 }
 
+func TestSnapshotWithJavaSdkLibrary_CompileDex(t *testing.T) {
+	result := android.GroupFixturePreparers(prepareForSdkTestWithJavaSdkLibrary).RunTestWithBp(t, `
+		sdk {
+			name: "mysdk",
+			java_sdk_libs: ["myjavalib"],
+		}
+
+		java_sdk_library {
+			name: "myjavalib",
+			srcs: ["Test.java"],
+			sdk_version: "current",
+			shared_library: false,
+			compile_dex: true,
+			public: {
+				enabled: true,
+			},
+			system: {
+				enabled: true,
+			},
+		}
+	`)
+
+	CheckSnapshot(t, result, "mysdk", "",
+		checkUnversionedAndroidBpContents(`
+// This is auto-generated. DO NOT EDIT.
+
+java_sdk_library_import {
+    name: "myjavalib",
+    prefer: false,
+    visibility: ["//visibility:public"],
+    apex_available: ["//apex_available:platform"],
+    shared_library: false,
+    compile_dex: true,
+    public: {
+        jars: ["sdk_library/public/myjavalib-stubs.jar"],
+        stub_srcs: ["sdk_library/public/myjavalib_stub_sources"],
+        current_api: "sdk_library/public/myjavalib.txt",
+        removed_api: "sdk_library/public/myjavalib-removed.txt",
+        sdk_version: "current",
+    },
+    system: {
+        jars: ["sdk_library/system/myjavalib-stubs.jar"],
+        stub_srcs: ["sdk_library/system/myjavalib_stub_sources"],
+        current_api: "sdk_library/system/myjavalib.txt",
+        removed_api: "sdk_library/system/myjavalib-removed.txt",
+        sdk_version: "system_current",
+    },
+}
+`),
+		snapshotTestChecker(checkSnapshotWithSourcePreferred, func(t *testing.T, result *android.TestResult) {
+			ctx := android.ModuleInstallPathContextForTesting(result.Config)
+			dexJarBuildPath := func(name string, kind android.SdkKind) string {
+				dep := result.Module(name, "android_common").(java.SdkLibraryDependency)
+				path := dep.SdkApiStubDexJar(ctx, kind)
+				return path.RelativeToTop().String()
+			}
+
+			dexJarPath := dexJarBuildPath("myjavalib", android.SdkPublic)
+			android.AssertStringEquals(t, "source dex public stubs jar build path", "out/soong/.intermediates/myjavalib.stubs/android_common/dex/myjavalib.stubs.jar", dexJarPath)
+
+			dexJarPath = dexJarBuildPath("myjavalib", android.SdkSystem)
+			systemDexJar := "out/soong/.intermediates/myjavalib.stubs.system/android_common/dex/myjavalib.stubs.system.jar"
+			android.AssertStringEquals(t, "source dex system stubs jar build path", systemDexJar, dexJarPath)
+
+			// This should fall back to system as module is not available.
+			dexJarPath = dexJarBuildPath("myjavalib", android.SdkModule)
+			android.AssertStringEquals(t, "source dex module stubs jar build path", systemDexJar, dexJarPath)
+
+			dexJarPath = dexJarBuildPath(android.PrebuiltNameFromSource("myjavalib"), android.SdkPublic)
+			android.AssertStringEquals(t, "prebuilt dex public stubs jar build path", "out/soong/.intermediates/snapshot/prebuilt_myjavalib.stubs/android_common/dex/myjavalib.stubs.jar", dexJarPath)
+		}),
+	)
+}
+
 func TestSnapshotWithJavaSdkLibrary_SdkVersion_None(t *testing.T) {
 	result := android.GroupFixturePreparers(prepareForSdkTestWithJavaSdkLibrary).RunTestWithBp(t, `
 		sdk {