Add class to source map support for instrumentation test apk

Summary: We are using coverage data for code coverage based test selection and we need to coverate data for test itself to make sure that we will select it in only test was changed.

Reviewed By: IanChilds

Differential Revision: D62024851

fbshipit-source-id: 81ecb75f1135b4f96f3d85f6624051c93f496786

android/android_instrumentation_apk.bzl

@@ -14,7 +14,9 @@ load("@prelude//android:configuration.bzl", "get_deps_by_platform")
 load("@prelude//android:dex_rules.bzl", "get_multi_dex", "get_single_primary_dex", "get_split_dex_merge_config", "merge_to_single_dex", "merge_to_split_dex")
 load("@prelude//android:preprocess_java_classes.bzl", "get_preprocessed_java_classes")
 load("@prelude//android:util.bzl", "create_enhancement_context")
+load("@prelude//java:class_to_srcs.bzl", "merge_class_to_source_map_from_jar")
 load("@prelude//java:java_providers.bzl", "create_java_packaging_dep", "get_all_java_packaging_deps")
+load("@prelude//java:java_toolchain.bzl", "JavaToolchainInfo")
 load("@prelude//java/utils:java_utils.bzl", "get_class_to_source_map_info")
 load("@prelude//utils:expect.bzl", "expect")
 
@@ -70,6 +72,7 @@ def android_instrumentation_apk_impl(ctx: AnalysisContext):
     ]
 
     enhance_ctx = create_enhancement_context(ctx)
+    sub_targets = enhance_ctx.get_sub_targets()
     materialized_artifacts = []
     if not disable_pre_dex:
         pre_dexed_libs = [java_packaging_dep.dex for java_packaging_dep in java_packaging_deps]
@@ -121,16 +124,24 @@ def android_instrumentation_apk_impl(ctx: AnalysisContext):
         resources_info = resources_info,
     )
 
-    class_to_srcs, _, _ = get_class_to_source_map_info(
+    class_to_srcs, _, class_to_srcs_subtargets = get_class_to_source_map_info(
         ctx,
         outputs = None,
         deps = deps,
     )
+    transitive_class_to_src_map = merge_class_to_source_map_from_jar(
+        actions = ctx.actions,
+        name = ctx.label.name + ".transitive_class_to_src.json",
+        java_toolchain = ctx.attrs._java_toolchain[JavaToolchainInfo],
+        relative_to = None,
+        deps = [class_to_srcs],
+    )
+    sub_targets["transitive_class_to_src_map"] = [DefaultInfo(default_output = transitive_class_to_src_map)]
 
     return [
         AndroidApkInfo(apk = output_apk, materialized_artifacts = materialized_artifacts, manifest = resources_info.manifest),
         AndroidInstrumentationApkInfo(apk_under_test = ctx.attrs.apk[AndroidApkInfo].apk),
-        DefaultInfo(default_output = output_apk, other_outputs = materialized_artifacts, sub_targets = enhance_ctx.get_sub_targets()),
+        DefaultInfo(default_output = output_apk, other_outputs = materialized_artifacts, sub_targets = sub_targets | class_to_srcs_subtargets),
         class_to_srcs,
     ]