Expose used_jars.json in a provider

Summary:
- used-jars.json files are used to remove unused dependencies from android/java/kotlin targets
- exposing them in a provider (JavaLibraryIntellijInfo) allows reading and ensuring them in BXL

Reviewed By: IanChilds

Differential Revision: D68282757

fbshipit-source-id: 4a201636a256cf78058df3f6b8132e8e855f4deb

prelude/java/java_library.bzl

@@ -688,6 +688,7 @@ def build_java_library(
         sources_jar = sources_jar,
         gwt_module = gwt_output,
         preprocessed_library = outputs.preprocessed_library if outputs else None,
+        used_jars_json = outputs.used_jars_json if outputs else None,
     )
 
     default_info = get_default_info(

prelude/java/java_providers.bzl

@@ -209,6 +209,7 @@ JavaLibraryIntellijInfo = provider(
         # If this library has a jar_postprocessor, this is the jar prior to post-processing.
         # Otherwise, it is the same as library_output in JavaLibraryInfo.
         "preprocessed_library": provider_field(typing.Any, default = None),  # ["artifact", None]
+        "used_jars_json": provider_field(typing.Any, default = None),  # ["artifact"]
     },
 )
 
@@ -237,6 +238,7 @@ JavaCompileOutputs = record(
     annotation_processor_output = Artifact | None,
     preprocessed_library = Artifact,
     incremental_state_dir = Artifact | None,
+    used_jars_json = Artifact | None,
 )
 
 JavaProviders = record(
@@ -281,7 +283,8 @@ def make_compile_outputs(
         required_for_source_only_abi: bool = False,
         annotation_processor_output: Artifact | None = None,
         incremental_state_dir: Artifact | None = None,
-        abi_jar_snapshot: Artifact | None = None) -> JavaCompileOutputs:
+        abi_jar_snapshot: Artifact | None = None,
+        used_jars_json: Artifact | None = None) -> JavaCompileOutputs:
     expect(classpath_abi != None or classpath_abi_dir == None, "A classpath_abi_dir should only be provided if a classpath_abi is provided!")
     return JavaCompileOutputs(
         full_library = full_library,
@@ -298,6 +301,7 @@ def make_compile_outputs(
         annotation_processor_output = annotation_processor_output,
         preprocessed_library = preprocessed_library,
         incremental_state_dir = incremental_state_dir,
+        used_jars_json = used_jars_json,
     )
 
 def create_abi(actions: AnalysisActions, class_abi_generator: Dependency, library: Artifact) -> Artifact:
@@ -636,7 +640,8 @@ def create_java_library_providers(
         proguard_config: Artifact | None = None,
         gwt_module: Artifact | None = None,
         lint_jar: Artifact | None = None,
-        preprocessed_library: Artifact | None = None) -> (JavaLibraryInfo, JavaPackagingInfo, JavaGlobalCodeInfo, SharedLibraryInfo, ResourceInfo, LinkableGraph, TemplatePlaceholderInfo, JavaLibraryIntellijInfo):
+        preprocessed_library: Artifact | None = None,
+        used_jars_json: Artifact | None = None) -> (JavaLibraryInfo, JavaPackagingInfo, JavaGlobalCodeInfo, SharedLibraryInfo, ResourceInfo, LinkableGraph, TemplatePlaceholderInfo, JavaLibraryIntellijInfo):
     first_order_classpath_deps = filter(None, [x.get(JavaLibraryInfo) for x in declared_deps + exported_deps + runtime_deps])
     first_order_classpath_libs = [dep.output_for_classpath_macro for dep in first_order_classpath_deps]
 
@@ -672,6 +677,7 @@ def create_java_library_providers(
         annotation_jars_dir = annotation_jars_dir,
         lint_jar = lint_jar,
         preprocessed_library = preprocessed_library,
+        used_jars_json = used_jars_json,
     )
 
     return (library_info, packaging_info, global_code_info, shared_library_info, cxx_resource_info, linkable_graph, template_info, intellij_info)

prelude/java/javacd_jar_creator.bzl

@@ -140,7 +140,7 @@ def create_jar_artifact_javacd(
         source_only_abi_compiling_deps = [],
         track_class_usage = track_class_usage,
     )
-    define_javacd_action(
+    used_jars_json = define_javacd_action(
         category_prefix = "",
         actions_identifier = actions_identifier,
         encoded_command = command,
@@ -196,6 +196,7 @@ def create_jar_artifact_javacd(
             required_for_source_only_abi = required_for_source_only_abi,
             annotation_processor_output = output_paths.annotations,
             abi_jar_snapshot = abi_jar_snapshot,
+            used_jars_json = used_jars_json,
         )
     else:
         full_jar_snapshot = generate_java_classpath_snapshot(ctx.actions, java_toolchain.cp_snapshot_generator, ClasspathSnapshotGranularity("CLASS_MEMBER_LEVEL"), final_jar_output.final_jar, actions_identifier)
@@ -205,6 +206,7 @@ def create_jar_artifact_javacd(
             required_for_source_only_abi = required_for_source_only_abi,
             annotation_processor_output = output_paths.annotations,
             abi_jar_snapshot = full_jar_snapshot,
+            used_jars_json = used_jars_json,
         )
     return result
 
@@ -298,6 +300,7 @@ def _define_javacd_action(
         post_build_params["abiOutputDir"] = abi_dir.as_output()
 
     dep_files = {}
+    used_jars_json_output = None
     if not is_creating_subtarget and srcs and (java_toolchain.dep_files == DepFiles("per_jar") or java_toolchain.dep_files == DepFiles("per_class")) and track_class_usage:
         abi_to_abi_dir_map = None
         hidden = []
@@ -354,3 +357,5 @@ def _define_javacd_action(
         weight = 2,
         error_handler = java_toolchain.java_error_handler,
     )
+
+    return used_jars_json_output

prelude/kotlin/kotlin_library.bzl

@@ -481,6 +481,7 @@ def build_kotlin_library(
                 has_srcs = bool(srcs),
                 sources_jar = sources_jar,
                 preprocessed_library = outputs.preprocessed_library if outputs else None,
+                used_jars_json = outputs.used_jars_json if outputs else None,
             )
 
             default_info = get_default_info(

prelude/kotlin/kotlincd_jar_creator.bzl

@@ -174,7 +174,7 @@ def create_jar_artifact_kotlincd(
         source_only_abi_compiling_deps = [],
         track_class_usage = track_class_usage,
     )
-    proto = define_kotlincd_action(
+    proto, used_jars_json = define_kotlincd_action(
         category_prefix = "",
         actions_identifier = actions_identifier,
         encoded_command = command,
@@ -249,6 +249,7 @@ def create_jar_artifact_kotlincd(
             annotation_processor_output = output_paths.annotations,
             incremental_state_dir = incremental_state_dir,
             abi_jar_snapshot = abi_jar_snapshot,
+            used_jars_json = used_jars_json,
         ), proto
     else:
         full_jar_snapshot = generate_java_classpath_snapshot(actions, java_toolchain.cp_snapshot_generator, ClasspathSnapshotGranularity("CLASS_MEMBER_LEVEL"), final_jar_output.final_jar, actions_identifier)
@@ -258,6 +259,7 @@ def create_jar_artifact_kotlincd(
             required_for_source_only_abi = required_for_source_only_abi,
             annotation_processor_output = output_paths.annotations,
             abi_jar_snapshot = full_jar_snapshot,
+            used_jars_json = used_jars_json,
         ), proto
 
 def _encode_kotlin_extra_params(
@@ -458,6 +460,7 @@ def _define_kotlincd_action(
         post_build_params["incrementalStateDir"] = incremental_state_dir.as_output()
 
     dep_files = {}
+    used_jars_json_output = None
     if not is_creating_subtarget and srcs and (kotlin_toolchain.dep_files == DepFiles("per_jar") or kotlin_toolchain.dep_files == DepFiles("per_class")) and target_type == TargetType("library") and track_class_usage:
         used_classes_json_outputs = [
             output_paths.jar_parent.project("used-classes.json"),
@@ -512,4 +515,4 @@ def _define_kotlincd_action(
         error_handler = kotlin_toolchain.kotlin_error_handler,
         **incremental_run_params
     )
-    return proto
+    return proto, used_jars_json_output