Add SoongExecutionMetrics to ninja run

This adds metrics for partial compilation to Soong.

- Soong_ui names the directory SOONG_METRICS_AGGREGATION_DIR, which it
  empties before each ninja run.
- Find_input_delta writes metrics there
- At the end of the build, Soong_ui aggregates the metrics that were
  written to generate the aggregated metrics.

Bug: b/376287012
Test: Manual, TH
Change-Id: I123df654f5b963fcd213b5c4d815173051f5d72e

9 files changed, 549 insertions, 273 deletions

diff --git a/ui/metrics/Android.bp b/ui/metrics/Android.bp
index 591e3cca6..2e19f7aa7 100644
--- a/ui/metrics/Android.bp
+++ b/ui/metrics/Android.bp
@@ -26,7 +26,7 @@ bootstrap_go_package {
         "soong-ui-metrics_proto",
         "soong-ui-mk_metrics_proto",
         "soong-shared",
-        "soong-ui-metrics_combined_proto",
+        "soong-ui-execution_metrics_proto",
     ],
     srcs: [
         "hostinfo.go",
@@ -64,15 +64,15 @@ bootstrap_go_package {
 }
 
 bootstrap_go_package {
-    name: "soong-ui-metrics_combined_proto",
-    pkgPath: "android/soong/ui/metrics/combined_metrics_proto",
+    name: "soong-ui-execution_metrics_proto",
+    pkgPath: "android/soong/ui/metrics/execution_metrics_proto",
     deps: [
         "golang-protobuf-reflect-protoreflect",
         "golang-protobuf-runtime-protoimpl",
         "soong-cmd-find_input_delta-proto",
     ],
     srcs: [
-        "metrics_proto/metrics.pb.go",
+        "execution_metrics_proto/execution_metrics.pb.go",
     ],
 }
 
diff --git a/ui/metrics/execution_metrics_proto/execution_metrics.pb.go b/ui/metrics/execution_metrics_proto/execution_metrics.pb.go
new file mode 100644
index 000000000..a065dbd00
--- /dev/null
+++ b/ui/metrics/execution_metrics_proto/execution_metrics.pb.go
@@ -0,0 +1,240 @@
+// Copyright 2024 Google Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// versions:
+// 	protoc-gen-go v1.30.0
+// 	protoc        v3.21.12
+// source: execution_metrics.proto
+
+package execution_metrics_proto
+
+import (
+	find_input_delta_proto "android/soong/cmd/find_input_delta/find_input_delta_proto"
+	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
+	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
+	reflect "reflect"
+	sync "sync"
+)
+
+const (
+	// Verify that this generated code is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
+	// Verify that runtime/protoimpl is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
+)
+
+// These field numbers are also found in the inner message declarations.
+// We verify that the values are the same, and that every enum value is checked
+// in execution_metrics_test.go.
+// Do not change this enum without also updating:
+//   - the submessage's .proto file
+//   - execution_metrics_test.go
+type FieldNumbers int32
+
+const (
+	FieldNumbers_FIELD_NUMBERS_UNSPECIFIED FieldNumbers = 0
+	FieldNumbers_FIELD_NUMBERS_FILE_LIST   FieldNumbers = 1
+)
+
+// Enum value maps for FieldNumbers.
+var (
+	FieldNumbers_name = map[int32]string{
+		0: "FIELD_NUMBERS_UNSPECIFIED",
+		1: "FIELD_NUMBERS_FILE_LIST",
+	}
+	FieldNumbers_value = map[string]int32{
+		"FIELD_NUMBERS_UNSPECIFIED": 0,
+		"FIELD_NUMBERS_FILE_LIST":   1,
+	}
+)
+
+func (x FieldNumbers) Enum() *FieldNumbers {
+	p := new(FieldNumbers)
+	*p = x
+	return p
+}
+
+func (x FieldNumbers) String() string {
+	return protoimpl.X.EnumStringOf(x.Descriptor(), protoreflect.EnumNumber(x))
+}
+
+func (FieldNumbers) Descriptor() protoreflect.EnumDescriptor {
+	return file_execution_metrics_proto_enumTypes[0].Descriptor()
+}
+
+func (FieldNumbers) Type() protoreflect.EnumType {
+	return &file_execution_metrics_proto_enumTypes[0]
+}
+
+func (x FieldNumbers) Number() protoreflect.EnumNumber {
+	return protoreflect.EnumNumber(x)
+}
+
+// Deprecated: Do not use.
+func (x *FieldNumbers) UnmarshalJSON(b []byte) error {
+	num, err := protoimpl.X.UnmarshalJSONEnum(x.Descriptor(), b)
+	if err != nil {
+		return err
+	}
+	*x = FieldNumbers(num)
+	return nil
+}
+
+// Deprecated: Use FieldNumbers.Descriptor instead.
+func (FieldNumbers) EnumDescriptor() ([]byte, []int) {
+	return file_execution_metrics_proto_rawDescGZIP(), []int{0}
+}
+
+type SoongExecutionMetrics struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	// cmd/find_input_delta/find_input_delta_proto.FileList
+	FileList *find_input_delta_proto.FileList `protobuf:"bytes,1,opt,name=file_list,json=fileList" json:"file_list,omitempty"`
+}
+
+func (x *SoongExecutionMetrics) Reset() {
+	*x = SoongExecutionMetrics{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_execution_metrics_proto_msgTypes[0]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *SoongExecutionMetrics) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*SoongExecutionMetrics) ProtoMessage() {}
+
+func (x *SoongExecutionMetrics) ProtoReflect() protoreflect.Message {
+	mi := &file_execution_metrics_proto_msgTypes[0]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use SoongExecutionMetrics.ProtoReflect.Descriptor instead.
+func (*SoongExecutionMetrics) Descriptor() ([]byte, []int) {
+	return file_execution_metrics_proto_rawDescGZIP(), []int{0}
+}
+
+func (x *SoongExecutionMetrics) GetFileList() *find_input_delta_proto.FileList {
+	if x != nil {
+		return x.FileList
+	}
+	return nil
+}
+
+var File_execution_metrics_proto protoreflect.FileDescriptor
+
+var file_execution_metrics_proto_rawDesc = []byte{
+	0x0a, 0x17, 0x65, 0x78, 0x65, 0x63, 0x75, 0x74, 0x69, 0x6f, 0x6e, 0x5f, 0x6d, 0x65, 0x74, 0x72,
+	0x69, 0x63, 0x73, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x12, 0x13, 0x73, 0x6f, 0x6f, 0x6e, 0x67,
+	0x5f, 0x62, 0x75, 0x69, 0x6c, 0x64, 0x5f, 0x6d, 0x65, 0x74, 0x72, 0x69, 0x63, 0x73, 0x1a, 0x3b,
+	0x63, 0x6d, 0x64, 0x2f, 0x66, 0x69, 0x6e, 0x64, 0x5f, 0x69, 0x6e, 0x70, 0x75, 0x74, 0x5f, 0x64,
+	0x65, 0x6c, 0x74, 0x61, 0x2f, 0x66, 0x69, 0x6e, 0x64, 0x5f, 0x69, 0x6e, 0x70, 0x75, 0x74, 0x5f,
+	0x64, 0x65, 0x6c, 0x74, 0x61, 0x5f, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x2f, 0x66, 0x69, 0x6c, 0x65,
+	0x5f, 0x6c, 0x69, 0x73, 0x74, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x22, 0x5e, 0x0a, 0x15, 0x53,
+	0x6f, 0x6f, 0x6e, 0x67, 0x45, 0x78, 0x65, 0x63, 0x75, 0x74, 0x69, 0x6f, 0x6e, 0x4d, 0x65, 0x74,
+	0x72, 0x69, 0x63, 0x73, 0x12, 0x45, 0x0a, 0x09, 0x66, 0x69, 0x6c, 0x65, 0x5f, 0x6c, 0x69, 0x73,
+	0x74, 0x18, 0x01, 0x20, 0x01, 0x28, 0x0b, 0x32, 0x28, 0x2e, 0x61, 0x6e, 0x64, 0x72, 0x6f, 0x69,
+	0x64, 0x2e, 0x66, 0x69, 0x6e, 0x64, 0x5f, 0x69, 0x6e, 0x70, 0x75, 0x74, 0x5f, 0x64, 0x65, 0x6c,
+	0x74, 0x61, 0x5f, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x2e, 0x46, 0x69, 0x6c, 0x65, 0x4c, 0x69, 0x73,
+	0x74, 0x52, 0x08, 0x66, 0x69, 0x6c, 0x65, 0x4c, 0x69, 0x73, 0x74, 0x2a, 0x4a, 0x0a, 0x0c, 0x46,
+	0x69, 0x65, 0x6c, 0x64, 0x4e, 0x75, 0x6d, 0x62, 0x65, 0x72, 0x73, 0x12, 0x1d, 0x0a, 0x19, 0x46,
+	0x49, 0x45, 0x4c, 0x44, 0x5f, 0x4e, 0x55, 0x4d, 0x42, 0x45, 0x52, 0x53, 0x5f, 0x55, 0x4e, 0x53,
+	0x50, 0x45, 0x43, 0x49, 0x46, 0x49, 0x45, 0x44, 0x10, 0x00, 0x12, 0x1b, 0x0a, 0x17, 0x46, 0x49,
+	0x45, 0x4c, 0x44, 0x5f, 0x4e, 0x55, 0x4d, 0x42, 0x45, 0x52, 0x53, 0x5f, 0x46, 0x49, 0x4c, 0x45,
+	0x5f, 0x4c, 0x49, 0x53, 0x54, 0x10, 0x01, 0x42, 0x32, 0x5a, 0x30, 0x61, 0x6e, 0x64, 0x72, 0x6f,
+	0x69, 0x64, 0x2f, 0x73, 0x6f, 0x6f, 0x6e, 0x67, 0x2f, 0x75, 0x69, 0x2f, 0x6d, 0x65, 0x74, 0x72,
+	0x69, 0x63, 0x73, 0x2f, 0x65, 0x78, 0x65, 0x63, 0x75, 0x74, 0x69, 0x6f, 0x6e, 0x5f, 0x6d, 0x65,
+	0x74, 0x72, 0x69, 0x63, 0x73, 0x5f, 0x70, 0x72, 0x6f, 0x74, 0x6f,
+}
+
+var (
+	file_execution_metrics_proto_rawDescOnce sync.Once
+	file_execution_metrics_proto_rawDescData = file_execution_metrics_proto_rawDesc
+)
+
+func file_execution_metrics_proto_rawDescGZIP() []byte {
+	file_execution_metrics_proto_rawDescOnce.Do(func() {
+		file_execution_metrics_proto_rawDescData = protoimpl.X.CompressGZIP(file_execution_metrics_proto_rawDescData)
+	})
+	return file_execution_metrics_proto_rawDescData
+}
+
+var file_execution_metrics_proto_enumTypes = make([]protoimpl.EnumInfo, 1)
+var file_execution_metrics_proto_msgTypes = make([]protoimpl.MessageInfo, 1)
+var file_execution_metrics_proto_goTypes = []interface{}{
+	(FieldNumbers)(0),                       // 0: soong_build_metrics.FieldNumbers
+	(*SoongExecutionMetrics)(nil),           // 1: soong_build_metrics.SoongExecutionMetrics
+	(*find_input_delta_proto.FileList)(nil), // 2: android.find_input_delta_proto.FileList
+}
+var file_execution_metrics_proto_depIdxs = []int32{
+	2, // 0: soong_build_metrics.SoongExecutionMetrics.file_list:type_name -> android.find_input_delta_proto.FileList
+	1, // [1:1] is the sub-list for method output_type
+	1, // [1:1] is the sub-list for method input_type
+	1, // [1:1] is the sub-list for extension type_name
+	1, // [1:1] is the sub-list for extension extendee
+	0, // [0:1] is the sub-list for field type_name
+}
+
+func init() { file_execution_metrics_proto_init() }
+func file_execution_metrics_proto_init() {
+	if File_execution_metrics_proto != nil {
+		return
+	}
+	if !protoimpl.UnsafeEnabled {
+		file_execution_metrics_proto_msgTypes[0].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*SoongExecutionMetrics); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+	}
+	type x struct{}
+	out := protoimpl.TypeBuilder{
+		File: protoimpl.DescBuilder{
+			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
+			RawDescriptor: file_execution_metrics_proto_rawDesc,
+			NumEnums:      1,
+			NumMessages:   1,
+			NumExtensions: 0,
+			NumServices:   0,
+		},
+		GoTypes:           file_execution_metrics_proto_goTypes,
+		DependencyIndexes: file_execution_metrics_proto_depIdxs,
+		EnumInfos:         file_execution_metrics_proto_enumTypes,
+		MessageInfos:      file_execution_metrics_proto_msgTypes,
+	}.Build()
+	File_execution_metrics_proto = out.File
+	file_execution_metrics_proto_rawDesc = nil
+	file_execution_metrics_proto_goTypes = nil
+	file_execution_metrics_proto_depIdxs = nil
+}
diff --git a/ui/metrics/metrics_proto/combined_metrics.proto b/ui/metrics/execution_metrics_proto/execution_metrics.proto
index 3cd9a5313..381dcd10a 100644
--- a/ui/metrics/metrics_proto/combined_metrics.proto
+++ b/ui/metrics/execution_metrics_proto/execution_metrics.proto
@@ -1,4 +1,4 @@
-// Copyright 2018 Google Inc. All Rights Reserved.
+// Copyright 2024 Google Inc. All Rights Reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -15,22 +15,22 @@
 syntax = "proto2";
 
 package soong_build_metrics;
-option go_package = "android/soong/ui/metrics/metrics_proto";
+option go_package = "android/soong/ui/metrics/execution_metrics_proto";
 
 import "cmd/find_input_delta/find_input_delta_proto/file_list.proto";
 
 // These field numbers are also found in the inner message declarations.
 // We verify that the values are the same, and that every enum value is checked
-// in combined_metrics_test.go.
+// in execution_metrics_test.go.
 // Do not change this enum without also updating:
 //  - the submessage's .proto file
-//  - combined_metrics_test.go
+//  - execution_metrics_test.go
 enum FieldNumbers {
   FIELD_NUMBERS_UNSPECIFIED = 0;
   FIELD_NUMBERS_FILE_LIST = 1;
 }
 
-message SoongCombinedMetrics {
+message SoongExecutionMetrics {
   // cmd/find_input_delta/find_input_delta_proto.FileList
   optional android.find_input_delta_proto.FileList file_list = 1;
 }
diff --git a/ui/metrics/metrics_proto/combined_metrics_test.go b/ui/metrics/execution_metrics_proto/execution_metrics_test.go
index eedb12a34..2f71c21dd 100644
--- a/ui/metrics/metrics_proto/combined_metrics_test.go
+++ b/ui/metrics/execution_metrics_proto/execution_metrics_test.go
@@ -1,4 +1,4 @@
-package metrics_proto
+package execution_metrics_proto
 
 import (
 	"testing"
@@ -6,7 +6,7 @@ import (
 	find_input_delta_proto "android/soong/cmd/find_input_delta/find_input_delta_proto"
 )
 
-func TestCombinedMetricsMessageNums(t *testing.T) {
+func TestExecutionMetricsMessageNums(t *testing.T) {
 	testCases := []struct {
 		Name         string
 		FieldNumbers map[string]int32
diff --git a/ui/metrics/execution_metrics_proto/regen.sh b/ui/metrics/execution_metrics_proto/regen.sh
new file mode 100755
index 000000000..5339a9ac9
--- /dev/null
+++ b/ui/metrics/execution_metrics_proto/regen.sh
@@ -0,0 +1,17 @@
+#!/bin/bash
+
+# Generates the golang source file of metrics.proto protobuf file.
+
+set -e
+
+function die() { echo "ERROR: $1" >&2; exit 1; }
+
+readonly error_msg="Maybe you need to run 'lunch aosp_arm-eng && m aprotoc blueprint_tools'?"
+
+if ! hash aprotoc &>/dev/null; then
+  die "could not find aprotoc. ${error_msg}"
+fi
+
+if ! aprotoc --go_out=paths=source_relative:. -I .:../../.. execution_metrics.proto; then
+  die "build failed. ${error_msg}"
+fi
diff --git a/ui/metrics/metrics_proto/combined_metrics.pb.go b/ui/metrics/metrics_proto/combined_metrics.pb.go
deleted file mode 100644
index f49d64d54..000000000
--- a/ui/metrics/metrics_proto/combined_metrics.pb.go
+++ /dev/null
@@ -1,239 +0,0 @@
-// Copyright 2018 Google Inc. All Rights Reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//   http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-// Code generated by protoc-gen-go. DO NOT EDIT.
-// versions:
-// 	protoc-gen-go v1.33.0
-// 	protoc        v3.21.12
-// source: combined_metrics.proto
-
-package metrics_proto
-
-import (
-	find_input_delta_proto "android/soong/cmd/find_input_delta/find_input_delta_proto"
-	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
-	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
-	reflect "reflect"
-	sync "sync"
-)
-
-const (
-	// Verify that this generated code is sufficiently up-to-date.
-	_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
-	// Verify that runtime/protoimpl is sufficiently up-to-date.
-	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
-)
-
-// These field numbers are also found in the inner message declarations.
-// We verify that the values are the same, and that every enum value is checked
-// in combined_metrics_test.go.
-// Do not change this enum without also updating:
-//   - the submessage's .proto file
-//   - combined_metrics_test.go
-type FieldNumbers int32
-
-const (
-	FieldNumbers_FIELD_NUMBERS_UNSPECIFIED FieldNumbers = 0
-	FieldNumbers_FIELD_NUMBERS_FILE_LIST   FieldNumbers = 1
-)
-
-// Enum value maps for FieldNumbers.
-var (
-	FieldNumbers_name = map[int32]string{
-		0: "FIELD_NUMBERS_UNSPECIFIED",
-		1: "FIELD_NUMBERS_FILE_LIST",
-	}
-	FieldNumbers_value = map[string]int32{
-		"FIELD_NUMBERS_UNSPECIFIED": 0,
-		"FIELD_NUMBERS_FILE_LIST":   1,
-	}
-)
-
-func (x FieldNumbers) Enum() *FieldNumbers {
-	p := new(FieldNumbers)
-	*p = x
-	return p
-}
-
-func (x FieldNumbers) String() string {
-	return protoimpl.X.EnumStringOf(x.Descriptor(), protoreflect.EnumNumber(x))
-}
-
-func (FieldNumbers) Descriptor() protoreflect.EnumDescriptor {
-	return file_combined_metrics_proto_enumTypes[0].Descriptor()
-}
-
-func (FieldNumbers) Type() protoreflect.EnumType {
-	return &file_combined_metrics_proto_enumTypes[0]
-}
-
-func (x FieldNumbers) Number() protoreflect.EnumNumber {
-	return protoreflect.EnumNumber(x)
-}
-
-// Deprecated: Do not use.
-func (x *FieldNumbers) UnmarshalJSON(b []byte) error {
-	num, err := protoimpl.X.UnmarshalJSONEnum(x.Descriptor(), b)
-	if err != nil {
-		return err
-	}
-	*x = FieldNumbers(num)
-	return nil
-}
-
-// Deprecated: Use FieldNumbers.Descriptor instead.
-func (FieldNumbers) EnumDescriptor() ([]byte, []int) {
-	return file_combined_metrics_proto_rawDescGZIP(), []int{0}
-}
-
-type SoongCombinedMetrics struct {
-	state         protoimpl.MessageState
-	sizeCache     protoimpl.SizeCache
-	unknownFields protoimpl.UnknownFields
-
-	// cmd/find_input_delta/find_input_delta_proto.FileList
-	FileList *find_input_delta_proto.FileList `protobuf:"bytes,1,opt,name=file_list,json=fileList" json:"file_list,omitempty"`
-}
-
-func (x *SoongCombinedMetrics) Reset() {
-	*x = SoongCombinedMetrics{}
-	if protoimpl.UnsafeEnabled {
-		mi := &file_combined_metrics_proto_msgTypes[0]
-		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
-		ms.StoreMessageInfo(mi)
-	}
-}
-
-func (x *SoongCombinedMetrics) String() string {
-	return protoimpl.X.MessageStringOf(x)
-}
-
-func (*SoongCombinedMetrics) ProtoMessage() {}
-
-func (x *SoongCombinedMetrics) ProtoReflect() protoreflect.Message {
-	mi := &file_combined_metrics_proto_msgTypes[0]
-	if protoimpl.UnsafeEnabled && x != nil {
-		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
-		if ms.LoadMessageInfo() == nil {
-			ms.StoreMessageInfo(mi)
-		}
-		return ms
-	}
-	return mi.MessageOf(x)
-}
-
-// Deprecated: Use SoongCombinedMetrics.ProtoReflect.Descriptor instead.
-func (*SoongCombinedMetrics) Descriptor() ([]byte, []int) {
-	return file_combined_metrics_proto_rawDescGZIP(), []int{0}
-}
-
-func (x *SoongCombinedMetrics) GetFileList() *find_input_delta_proto.FileList {
-	if x != nil {
-		return x.FileList
-	}
-	return nil
-}
-
-var File_combined_metrics_proto protoreflect.FileDescriptor
-
-var file_combined_metrics_proto_rawDesc = []byte{
-	0x0a, 0x16, 0x63, 0x6f, 0x6d, 0x62, 0x69, 0x6e, 0x65, 0x64, 0x5f, 0x6d, 0x65, 0x74, 0x72, 0x69,
-	0x63, 0x73, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x12, 0x13, 0x73, 0x6f, 0x6f, 0x6e, 0x67, 0x5f,
-	0x62, 0x75, 0x69, 0x6c, 0x64, 0x5f, 0x6d, 0x65, 0x74, 0x72, 0x69, 0x63, 0x73, 0x1a, 0x3b, 0x63,
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-	0x4c, 0x44, 0x5f, 0x4e, 0x55, 0x4d, 0x42, 0x45, 0x52, 0x53, 0x5f, 0x55, 0x4e, 0x53, 0x50, 0x45,
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-}
-
-var (
-	file_combined_metrics_proto_rawDescOnce sync.Once
-	file_combined_metrics_proto_rawDescData = file_combined_metrics_proto_rawDesc
-)
-
-func file_combined_metrics_proto_rawDescGZIP() []byte {
-	file_combined_metrics_proto_rawDescOnce.Do(func() {
-		file_combined_metrics_proto_rawDescData = protoimpl.X.CompressGZIP(file_combined_metrics_proto_rawDescData)
-	})
-	return file_combined_metrics_proto_rawDescData
-}
-
-var file_combined_metrics_proto_enumTypes = make([]protoimpl.EnumInfo, 1)
-var file_combined_metrics_proto_msgTypes = make([]protoimpl.MessageInfo, 1)
-var file_combined_metrics_proto_goTypes = []interface{}{
-	(FieldNumbers)(0),                       // 0: soong_build_metrics.FieldNumbers
-	(*SoongCombinedMetrics)(nil),            // 1: soong_build_metrics.SoongCombinedMetrics
-	(*find_input_delta_proto.FileList)(nil), // 2: android.find_input_delta_proto.FileList
-}
-var file_combined_metrics_proto_depIdxs = []int32{
-	2, // 0: soong_build_metrics.SoongCombinedMetrics.file_list:type_name -> android.find_input_delta_proto.FileList
-	1, // [1:1] is the sub-list for method output_type
-	1, // [1:1] is the sub-list for method input_type
-	1, // [1:1] is the sub-list for extension type_name
-	1, // [1:1] is the sub-list for extension extendee
-	0, // [0:1] is the sub-list for field type_name
-}
-
-func init() { file_combined_metrics_proto_init() }
-func file_combined_metrics_proto_init() {
-	if File_combined_metrics_proto != nil {
-		return
-	}
-	if !protoimpl.UnsafeEnabled {
-		file_combined_metrics_proto_msgTypes[0].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*SoongCombinedMetrics); i {
-			case 0:
-				return &v.state
-			case 1:
-				return &v.sizeCache
-			case 2:
-				return &v.unknownFields
-			default:
-				return nil
-			}
-		}
-	}
-	type x struct{}
-	out := protoimpl.TypeBuilder{
-		File: protoimpl.DescBuilder{
-			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
-			RawDescriptor: file_combined_metrics_proto_rawDesc,
-			NumEnums:      1,
-			NumMessages:   1,
-			NumExtensions: 0,
-			NumServices:   0,
-		},
-		GoTypes:           file_combined_metrics_proto_goTypes,
-		DependencyIndexes: file_combined_metrics_proto_depIdxs,
-		EnumInfos:         file_combined_metrics_proto_enumTypes,
-		MessageInfos:      file_combined_metrics_proto_msgTypes,
-	}.Build()
-	File_combined_metrics_proto = out.File
-	file_combined_metrics_proto_rawDesc = nil
-	file_combined_metrics_proto_goTypes = nil
-	file_combined_metrics_proto_depIdxs = nil
-}
diff --git a/ui/metrics/metrics_proto/metrics.pb.go b/ui/metrics/metrics_proto/metrics.pb.go
index 72fdbe829..0aa51b166 100644
--- a/ui/metrics/metrics_proto/metrics.pb.go
+++ b/ui/metrics/metrics_proto/metrics.pb.go
@@ -14,7 +14,7 @@
 
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
-// 	protoc-gen-go v1.33.0
+// 	protoc-gen-go v1.30.0
 // 	protoc        v3.21.12
 // source: metrics.proto
 
@@ -2080,6 +2080,177 @@ func (x *OptimizedBuildMetrics) GetTargetResult() []*OptimizedBuildMetrics_Targe
 	return nil
 }
 
+// This is created by soong_ui from the various
+// android.find_input_delta_proto.FileList metrics provided to it by
+// find_input_delta.
+type AggregatedFileList struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	// The arguments provided on the command line.
+	CommandArgs []string `protobuf:"bytes,1,rep,name=command_args,json=commandArgs" json:"command_args,omitempty"`
+	// The (possibly truncated list of) added files.
+	Additions []string `protobuf:"bytes,2,rep,name=additions" json:"additions,omitempty"`
+	// The (possibly truncated list of) changed files.
+	Changes []string `protobuf:"bytes,3,rep,name=changes" json:"changes,omitempty"`
+	// The (possibly truncated list of) deleted files.
+	Deletions []string `protobuf:"bytes,4,rep,name=deletions" json:"deletions,omitempty"`
+	// Count of files added/changed/deleted.
+	TotalDelta *uint32 `protobuf:"varint,5,opt,name=total_delta,json=totalDelta" json:"total_delta,omitempty"`
+	// Counts by extension.
+	Counts []*FileCount `protobuf:"bytes,6,rep,name=counts" json:"counts,omitempty"`
+}
+
+func (x *AggregatedFileList) Reset() {
+	*x = AggregatedFileList{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_metrics_proto_msgTypes[19]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *AggregatedFileList) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*AggregatedFileList) ProtoMessage() {}
+
+func (x *AggregatedFileList) ProtoReflect() protoreflect.Message {
+	mi := &file_metrics_proto_msgTypes[19]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use AggregatedFileList.ProtoReflect.Descriptor instead.
+func (*AggregatedFileList) Descriptor() ([]byte, []int) {
+	return file_metrics_proto_rawDescGZIP(), []int{19}
+}
+
+func (x *AggregatedFileList) GetCommandArgs() []string {
+	if x != nil {
+		return x.CommandArgs
+	}
+	return nil
+}
+
+func (x *AggregatedFileList) GetAdditions() []string {
+	if x != nil {
+		return x.Additions
+	}
+	return nil
+}
+
+func (x *AggregatedFileList) GetChanges() []string {
+	if x != nil {
+		return x.Changes
+	}
+	return nil
+}
+
+func (x *AggregatedFileList) GetDeletions() []string {
+	if x != nil {
+		return x.Deletions
+	}
+	return nil
+}
+
+func (x *AggregatedFileList) GetTotalDelta() uint32 {
+	if x != nil && x.TotalDelta != nil {
+		return *x.TotalDelta
+	}
+	return 0
+}
+
+func (x *AggregatedFileList) GetCounts() []*FileCount {
+	if x != nil {
+		return x.Counts
+	}
+	return nil
+}
+
+type FileCount struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	// The file extension
+	Extension *string `protobuf:"bytes,1,opt,name=extension" json:"extension,omitempty"`
+	// Number of added files with this extension.
+	Additions *uint32 `protobuf:"varint,2,opt,name=additions" json:"additions,omitempty"`
+	// Number of modified files with this extension.
+	Modifications *uint32 `protobuf:"varint,3,opt,name=modifications" json:"modifications,omitempty"`
+	// Number of deleted files with this extension.
+	Deletions *uint32 `protobuf:"varint,4,opt,name=deletions" json:"deletions,omitempty"`
+}
+
+func (x *FileCount) Reset() {
+	*x = FileCount{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_metrics_proto_msgTypes[20]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *FileCount) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*FileCount) ProtoMessage() {}
+
+func (x *FileCount) ProtoReflect() protoreflect.Message {
+	mi := &file_metrics_proto_msgTypes[20]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use FileCount.ProtoReflect.Descriptor instead.
+func (*FileCount) Descriptor() ([]byte, []int) {
+	return file_metrics_proto_rawDescGZIP(), []int{20}
+}
+
+func (x *FileCount) GetExtension() string {
+	if x != nil && x.Extension != nil {
+		return *x.Extension
+	}
+	return ""
+}
+
+func (x *FileCount) GetAdditions() uint32 {
+	if x != nil && x.Additions != nil {
+		return *x.Additions
+	}
+	return 0
+}
+
+func (x *FileCount) GetModifications() uint32 {
+	if x != nil && x.Modifications != nil {
+		return *x.Modifications
+	}
+	return 0
+}
+
+func (x *FileCount) GetDeletions() uint32 {
+	if x != nil && x.Deletions != nil {
+		return *x.Deletions
+	}
+	return 0
+}
+
 type OptimizedBuildMetrics_TargetOptimizationResult struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -2101,7 +2272,7 @@ type OptimizedBuildMetrics_TargetOptimizationResult struct {
 func (x *OptimizedBuildMetrics_TargetOptimizationResult) Reset() {
 	*x = OptimizedBuildMetrics_TargetOptimizationResult{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_metrics_proto_msgTypes[19]
+		mi := &file_metrics_proto_msgTypes[21]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -2114,7 +2285,7 @@ func (x *OptimizedBuildMetrics_TargetOptimizationResult) String() string {
 func (*OptimizedBuildMetrics_TargetOptimizationResult) ProtoMessage() {}
 
 func (x *OptimizedBuildMetrics_TargetOptimizationResult) ProtoReflect() protoreflect.Message {
-	mi := &file_metrics_proto_msgTypes[19]
+	mi := &file_metrics_proto_msgTypes[21]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -2181,7 +2352,7 @@ type OptimizedBuildMetrics_TargetOptimizationResult_OutputArtifact struct {
 func (x *OptimizedBuildMetrics_TargetOptimizationResult_OutputArtifact) Reset() {
 	*x = OptimizedBuildMetrics_TargetOptimizationResult_OutputArtifact{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_metrics_proto_msgTypes[20]
+		mi := &file_metrics_proto_msgTypes[22]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -2194,7 +2365,7 @@ func (x *OptimizedBuildMetrics_TargetOptimizationResult_OutputArtifact) String()
 func (*OptimizedBuildMetrics_TargetOptimizationResult_OutputArtifact) ProtoMessage() {}
 
 func (x *OptimizedBuildMetrics_TargetOptimizationResult_OutputArtifact) ProtoReflect() protoreflect.Message {
-	mi := &file_metrics_proto_msgTypes[20]
+	mi := &file_metrics_proto_msgTypes[22]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -2637,10 +2808,33 @@ var file_metrics_proto_rawDesc = []byte{
 	0x0a, 0x04, 0x73, 0x69, 0x7a, 0x65, 0x18, 0x02, 0x20, 0x01, 0x28, 0x03, 0x52, 0x04, 0x73, 0x69,
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+	0x73, 0x18, 0x03, 0x20, 0x01, 0x28, 0x0d, 0x52, 0x0d, 0x6d, 0x6f, 0x64, 0x69, 0x66, 0x69, 0x63,
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+	0x6f, 0x6e, 0x73, 0x18, 0x04, 0x20, 0x01, 0x28, 0x0d, 0x52, 0x09, 0x64, 0x65, 0x6c, 0x65, 0x74,
+	0x69, 0x6f, 0x6e, 0x73, 0x42, 0x28, 0x5a, 0x26, 0x61, 0x6e, 0x64, 0x72, 0x6f, 0x69, 0x64, 0x2f,
+	0x73, 0x6f, 0x6f, 0x6e, 0x67, 0x2f, 0x75, 0x69, 0x2f, 0x6d, 0x65, 0x74, 0x72, 0x69, 0x63, 0x73,
+	0x2f, 0x6d, 0x65, 0x74, 0x72, 0x69, 0x63, 0x73, 0x5f, 0x70, 0x72, 0x6f, 0x74, 0x6f,
 }
 
 var (
@@ -2656,7 +2850,7 @@ func file_metrics_proto_rawDescGZIP() []byte {
 }
 
 var file_metrics_proto_enumTypes = make([]protoimpl.EnumInfo, 5)
-var file_metrics_proto_msgTypes = make([]protoimpl.MessageInfo, 21)
+var file_metrics_proto_msgTypes = make([]protoimpl.MessageInfo, 23)
 var file_metrics_proto_goTypes = []interface{}{
 	(MetricsBase_BuildVariant)(0),                          // 0: soong_build_metrics.MetricsBase.BuildVariant
 	(MetricsBase_Arch)(0),                                  // 1: soong_build_metrics.MetricsBase.Arch
@@ -2682,8 +2876,10 @@ var file_metrics_proto_goTypes = []interface{}{
 	(*CriticalPathInfo)(nil),                               // 21: soong_build_metrics.CriticalPathInfo
 	(*JobInfo)(nil),                                        // 22: soong_build_metrics.JobInfo
 	(*OptimizedBuildMetrics)(nil),                          // 23: soong_build_metrics.OptimizedBuildMetrics
-	(*OptimizedBuildMetrics_TargetOptimizationResult)(nil), // 24: soong_build_metrics.OptimizedBuildMetrics.TargetOptimizationResult
-	(*OptimizedBuildMetrics_TargetOptimizationResult_OutputArtifact)(nil), // 25: soong_build_metrics.OptimizedBuildMetrics.TargetOptimizationResult.OutputArtifact
+	(*AggregatedFileList)(nil),                             // 24: soong_build_metrics.AggregatedFileList
+	(*FileCount)(nil),                                      // 25: soong_build_metrics.FileCount
+	(*OptimizedBuildMetrics_TargetOptimizationResult)(nil), // 26: soong_build_metrics.OptimizedBuildMetrics.TargetOptimizationResult
+	(*OptimizedBuildMetrics_TargetOptimizationResult_OutputArtifact)(nil), // 27: soong_build_metrics.OptimizedBuildMetrics.TargetOptimizationResult.OutputArtifact
 }
 var file_metrics_proto_depIdxs = []int32{
 	0,  // 0: soong_build_metrics.MetricsBase.target_build_variant:type_name -> soong_build_metrics.MetricsBase.BuildVariant
@@ -2719,14 +2915,15 @@ var file_metrics_proto_depIdxs = []int32{
 	22, // 30: soong_build_metrics.CriticalPathInfo.long_running_jobs:type_name -> soong_build_metrics.JobInfo
 	10, // 31: soong_build_metrics.OptimizedBuildMetrics.analysis_perf:type_name -> soong_build_metrics.PerfInfo
 	10, // 32: soong_build_metrics.OptimizedBuildMetrics.packaging_perf:type_name -> soong_build_metrics.PerfInfo
-	24, // 33: soong_build_metrics.OptimizedBuildMetrics.target_result:type_name -> soong_build_metrics.OptimizedBuildMetrics.TargetOptimizationResult
-	10, // 34: soong_build_metrics.OptimizedBuildMetrics.TargetOptimizationResult.packaging_perf:type_name -> soong_build_metrics.PerfInfo
-	25, // 35: soong_build_metrics.OptimizedBuildMetrics.TargetOptimizationResult.output_artifact:type_name -> soong_build_metrics.OptimizedBuildMetrics.TargetOptimizationResult.OutputArtifact
-	36, // [36:36] is the sub-list for method output_type
-	36, // [36:36] is the sub-list for method input_type
-	36, // [36:36] is the sub-list for extension type_name
-	36, // [36:36] is the sub-list for extension extendee
-	0,  // [0:36] is the sub-list for field type_name
+	26, // 33: soong_build_metrics.OptimizedBuildMetrics.target_result:type_name -> soong_build_metrics.OptimizedBuildMetrics.TargetOptimizationResult
+	25, // 34: soong_build_metrics.AggregatedFileList.counts:type_name -> soong_build_metrics.FileCount
+	10, // 35: soong_build_metrics.OptimizedBuildMetrics.TargetOptimizationResult.packaging_perf:type_name -> soong_build_metrics.PerfInfo
+	27, // 36: soong_build_metrics.OptimizedBuildMetrics.TargetOptimizationResult.output_artifact:type_name -> soong_build_metrics.OptimizedBuildMetrics.TargetOptimizationResult.OutputArtifact
+	37, // [37:37] is the sub-list for method output_type
+	37, // [37:37] is the sub-list for method input_type
+	37, // [37:37] is the sub-list for extension type_name
+	37, // [37:37] is the sub-list for extension extendee
+	0,  // [0:37] is the sub-list for field type_name
 }
 
 func init() { file_metrics_proto_init() }
@@ -2964,7 +3161,7 @@ func file_metrics_proto_init() {
 			}
 		}
 		file_metrics_proto_msgTypes[19].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*OptimizedBuildMetrics_TargetOptimizationResult); i {
+			switch v := v.(*AggregatedFileList); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -2976,6 +3173,30 @@ func file_metrics_proto_init() {
 			}
 		}
 		file_metrics_proto_msgTypes[20].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*FileCount); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_metrics_proto_msgTypes[21].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*OptimizedBuildMetrics_TargetOptimizationResult); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_metrics_proto_msgTypes[22].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*OptimizedBuildMetrics_TargetOptimizationResult_OutputArtifact); i {
 			case 0:
 				return &v.state
@@ -2994,7 +3215,7 @@ func file_metrics_proto_init() {
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
 			RawDescriptor: file_metrics_proto_rawDesc,
 			NumEnums:      5,
-			NumMessages:   21,
+			NumMessages:   23,
 			NumExtensions: 0,
 			NumServices:   0,
 		},
diff --git a/ui/metrics/metrics_proto/metrics.proto b/ui/metrics/metrics_proto/metrics.proto
index 3fbe97c0b..8437b65ae 100644
--- a/ui/metrics/metrics_proto/metrics.proto
+++ b/ui/metrics/metrics_proto/metrics.proto
@@ -451,3 +451,40 @@ message OptimizedBuildMetrics {
     }
   }
 }
+
+// This is created by soong_ui from the various
+// android.find_input_delta_proto.FileList metrics provided to it by
+// find_input_delta.
+message AggregatedFileList {
+  // The arguments provided on the command line.
+  repeated string command_args = 1;
+
+  // The (possibly truncated list of) added files.
+  repeated string additions = 2;
+
+  // The (possibly truncated list of) changed files.
+  repeated string changes = 3;
+
+  // The (possibly truncated list of) deleted files.
+  repeated string deletions = 4;
+
+  // Count of files added/changed/deleted.
+  optional uint32 total_delta = 5;
+
+  // Counts by extension.
+  repeated FileCount counts = 6;
+}
+
+message FileCount {
+  // The file extension
+  optional string extension = 1;
+
+  // Number of added files with this extension.
+  optional uint32 additions = 2;
+
+  // Number of modified files with this extension.
+  optional uint32 modifications = 3;
+
+  // Number of deleted files with this extension.
+  optional uint32 deletions = 4;
+}
diff --git a/ui/metrics/metrics_proto/regen.sh b/ui/metrics/metrics_proto/regen.sh
index 5e5f9b83f..8eb2d747b 100755
--- a/ui/metrics/metrics_proto/regen.sh
+++ b/ui/metrics/metrics_proto/regen.sh
@@ -12,6 +12,6 @@ if ! hash aprotoc &>/dev/null; then
   die "could not find aprotoc. ${error_msg}"
 fi
 
-if ! aprotoc --go_out=paths=source_relative:. -I .:../../.. metrics.proto combined_metrics.proto; then
+if ! aprotoc --go_out=paths=source_relative:. metrics.proto; then
   die "build failed. ${error_msg}"
 fi