Start collecting build configuration metrics.

This is an initial CL that collects the environment variables
USE_GOMA and USE_RBE. This is a needed metric to determine how
many users are currently using GOMA so we can help them migrate
to RBE.

Bug: b/163598127
Test: m nothing and checked soong_metrics
Change-Id: I39536eabad01aafbb3bd7182515d72230b36f658
Merged-In: I39536eabad01aafbb3bd7182515d72230b36f658
diff --git a/ui/build/config.go b/ui/build/config.go
index b208a45..f0310d5 100644
--- a/ui/build/config.go
+++ b/ui/build/config.go
@@ -23,6 +23,9 @@
 	"time"
 
 	"android/soong/shared"
+	"github.com/golang/protobuf/proto"
+
+	smpb "android/soong/ui/metrics/metrics_proto"
 )
 
 type Config struct{ *configImpl }
@@ -258,7 +261,9 @@
 
 	ret.environ.Set("BUILD_DATETIME_FILE", buildDateTimeFile)
 
-	return Config{ret}
+	c := Config{ret}
+	storeConfigMetrics(ctx, c)
+	return c
 }
 
 // NewBuildActionConfig returns a build configuration based on the build action. The arguments are
@@ -267,6 +272,20 @@
 	return NewConfig(ctx, getConfigArgs(action, dir, ctx, args)...)
 }
 
+// storeConfigMetrics selects a set of configuration information and store in
+// the metrics system for further analysis.
+func storeConfigMetrics(ctx Context, config Config) {
+	if ctx.Metrics == nil {
+		return
+	}
+
+	b := &smpb.BuildConfig{
+		UseGoma: proto.Bool(config.UseGoma()),
+		UseRbe:  proto.Bool(config.UseRBE()),
+	}
+	ctx.Metrics.BuildConfig(b)
+}
+
 // getConfigArgs processes the command arguments based on the build action and creates a set of new
 // arguments to be accepted by Config.
 func getConfigArgs(action BuildAction, dir string, ctx Context, args []string) []string {
diff --git a/ui/metrics/metrics.go b/ui/metrics/metrics.go
index 1b284aa..65cae4a 100644
--- a/ui/metrics/metrics.go
+++ b/ui/metrics/metrics.go
@@ -66,6 +66,10 @@
 	}
 }
 
+func (m *Metrics) BuildConfig(b *soong_metrics_proto.BuildConfig) {
+	m.metrics.BuildConfig = b
+}
+
 func (m *Metrics) SetMetadataMetrics(metadata map[string]string) {
 	for k, v := range metadata {
 		switch k {
diff --git a/ui/metrics/metrics_proto/metrics.pb.go b/ui/metrics/metrics_proto/metrics.pb.go
index 3986d0e..aaa8587 100644
--- a/ui/metrics/metrics_proto/metrics.pb.go
+++ b/ui/metrics/metrics_proto/metrics.pb.go
@@ -152,7 +152,7 @@
 }
 
 func (ModuleTypeInfo_BuildSystem) EnumDescriptor() ([]byte, []int) {
-	return fileDescriptor_6039342a2ba47b72, []int{2, 0}
+	return fileDescriptor_6039342a2ba47b72, []int{3, 0}
 }
 
 type MetricsBase struct {
@@ -197,10 +197,11 @@
 	// The metrics for calling Ninja.
 	NinjaRuns []*PerfInfo `protobuf:"bytes,20,rep,name=ninja_runs,json=ninjaRuns" json:"ninja_runs,omitempty"`
 	// The metrics for the whole build
-	Total                *PerfInfo `protobuf:"bytes,21,opt,name=total" json:"total,omitempty"`
-	XXX_NoUnkeyedLiteral struct{}  `json:"-"`
-	XXX_unrecognized     []byte    `json:"-"`
-	XXX_sizecache        int32     `json:"-"`
+	Total                *PerfInfo    `protobuf:"bytes,21,opt,name=total" json:"total,omitempty"`
+	BuildConfig          *BuildConfig `protobuf:"bytes,23,opt,name=build_config,json=buildConfig" json:"build_config,omitempty"`
+	XXX_NoUnkeyedLiteral struct{}     `json:"-"`
+	XXX_unrecognized     []byte       `json:"-"`
+	XXX_sizecache        int32        `json:"-"`
 }
 
 func (m *MetricsBase) Reset()         { *m = MetricsBase{} }
@@ -380,6 +381,60 @@
 	return nil
 }
 
+func (m *MetricsBase) GetBuildConfig() *BuildConfig {
+	if m != nil {
+		return m.BuildConfig
+	}
+	return nil
+}
+
+type BuildConfig struct {
+	UseGoma              *bool    `protobuf:"varint,1,opt,name=use_goma,json=useGoma" json:"use_goma,omitempty"`
+	UseRbe               *bool    `protobuf:"varint,2,opt,name=use_rbe,json=useRbe" json:"use_rbe,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *BuildConfig) Reset()         { *m = BuildConfig{} }
+func (m *BuildConfig) String() string { return proto.CompactTextString(m) }
+func (*BuildConfig) ProtoMessage()    {}
+func (*BuildConfig) Descriptor() ([]byte, []int) {
+	return fileDescriptor_6039342a2ba47b72, []int{1}
+}
+
+func (m *BuildConfig) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_BuildConfig.Unmarshal(m, b)
+}
+func (m *BuildConfig) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_BuildConfig.Marshal(b, m, deterministic)
+}
+func (m *BuildConfig) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_BuildConfig.Merge(m, src)
+}
+func (m *BuildConfig) XXX_Size() int {
+	return xxx_messageInfo_BuildConfig.Size(m)
+}
+func (m *BuildConfig) XXX_DiscardUnknown() {
+	xxx_messageInfo_BuildConfig.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_BuildConfig proto.InternalMessageInfo
+
+func (m *BuildConfig) GetUseGoma() bool {
+	if m != nil && m.UseGoma != nil {
+		return *m.UseGoma
+	}
+	return false
+}
+
+func (m *BuildConfig) GetUseRbe() bool {
+	if m != nil && m.UseRbe != nil {
+		return *m.UseRbe
+	}
+	return false
+}
+
 type PerfInfo struct {
 	// The description for the phase/action/part while the tool running.
 	Desc *string `protobuf:"bytes,1,opt,name=desc" json:"desc,omitempty"`
@@ -402,7 +457,7 @@
 func (m *PerfInfo) String() string { return proto.CompactTextString(m) }
 func (*PerfInfo) ProtoMessage()    {}
 func (*PerfInfo) Descriptor() ([]byte, []int) {
-	return fileDescriptor_6039342a2ba47b72, []int{1}
+	return fileDescriptor_6039342a2ba47b72, []int{2}
 }
 
 func (m *PerfInfo) XXX_Unmarshal(b []byte) error {
@@ -474,7 +529,7 @@
 func (m *ModuleTypeInfo) String() string { return proto.CompactTextString(m) }
 func (*ModuleTypeInfo) ProtoMessage()    {}
 func (*ModuleTypeInfo) Descriptor() ([]byte, []int) {
-	return fileDescriptor_6039342a2ba47b72, []int{2}
+	return fileDescriptor_6039342a2ba47b72, []int{3}
 }
 
 func (m *ModuleTypeInfo) XXX_Unmarshal(b []byte) error {
@@ -532,7 +587,7 @@
 func (m *CriticalUserJourneyMetrics) String() string { return proto.CompactTextString(m) }
 func (*CriticalUserJourneyMetrics) ProtoMessage()    {}
 func (*CriticalUserJourneyMetrics) Descriptor() ([]byte, []int) {
-	return fileDescriptor_6039342a2ba47b72, []int{3}
+	return fileDescriptor_6039342a2ba47b72, []int{4}
 }
 
 func (m *CriticalUserJourneyMetrics) XXX_Unmarshal(b []byte) error {
@@ -579,7 +634,7 @@
 func (m *CriticalUserJourneysMetrics) String() string { return proto.CompactTextString(m) }
 func (*CriticalUserJourneysMetrics) ProtoMessage()    {}
 func (*CriticalUserJourneysMetrics) Descriptor() ([]byte, []int) {
-	return fileDescriptor_6039342a2ba47b72, []int{4}
+	return fileDescriptor_6039342a2ba47b72, []int{5}
 }
 
 func (m *CriticalUserJourneysMetrics) XXX_Unmarshal(b []byte) error {
@@ -612,6 +667,7 @@
 	proto.RegisterEnum("soong_build_metrics.MetricsBase_Arch", MetricsBase_Arch_name, MetricsBase_Arch_value)
 	proto.RegisterEnum("soong_build_metrics.ModuleTypeInfo_BuildSystem", ModuleTypeInfo_BuildSystem_name, ModuleTypeInfo_BuildSystem_value)
 	proto.RegisterType((*MetricsBase)(nil), "soong_build_metrics.MetricsBase")
+	proto.RegisterType((*BuildConfig)(nil), "soong_build_metrics.BuildConfig")
 	proto.RegisterType((*PerfInfo)(nil), "soong_build_metrics.PerfInfo")
 	proto.RegisterType((*ModuleTypeInfo)(nil), "soong_build_metrics.ModuleTypeInfo")
 	proto.RegisterType((*CriticalUserJourneyMetrics)(nil), "soong_build_metrics.CriticalUserJourneyMetrics")
@@ -621,58 +677,62 @@
 func init() { proto.RegisterFile("metrics.proto", fileDescriptor_6039342a2ba47b72) }
 
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+	0xc1, 0xbd, 0xe5, 0xb2, 0x0a, 0xeb, 0x7e, 0x57, 0x58, 0x47, 0x1b, 0x60, 0x54, 0x0a, 0x6d, 0x34,
+	0x3b, 0x2e, 0x52, 0x63, 0x08, 0xdf, 0x65, 0xe8, 0x69, 0x93, 0xe3, 0x22, 0x45, 0xcf, 0x7d, 0x68,
+	0xa1, 0x27, 0x97, 0x81, 0x87, 0x3d, 0x6c, 0xeb, 0xd7, 0xb1, 0x24, 0x61, 0xb5, 0x18, 0x97, 0x11,
+	0xfb, 0x4b, 0x89, 0x38, 0xd8, 0x41, 0xd8, 0x33, 0xf0, 0x40, 0x97, 0x56, 0x9c, 0x44, 0x70, 0x29,
+	0xb5, 0x45, 0xfb, 0x8e, 0xd3, 0xd7, 0xb5, 0xb1, 0x24, 0x3f, 0xc2, 0xe3, 0x06, 0x07, 0x63, 0x77,
+	0xcc, 0xe7, 0xb3, 0x62, 0x61, 0x90, 0x97, 0xb0, 0xdb, 0xe0, 0xad, 0x5a, 0x7c, 0x6c, 0x36, 0x76,
+	0xc5, 0x6d, 0xe4, 0xe6, 0xa5, 0x8a, 0xd2, 0x4c, 0x04, 0xbe, 0xc9, 0xcd, 0x4b, 0x75, 0x9e, 0x09,
+	0xf2, 0x0b, 0x78, 0x92, 0xa9, 0x72, 0x11, 0x29, 0xce, 0xe7, 0x32, 0x78, 0xd2, 0xdd, 0x3c, 0xf4,
+	0x8e, 0x0f, 0xd6, 0x6e, 0xd1, 0x07, 0x26, 0x66, 0xef, 0x8b, 0x19, 0xa7, 0x80, 0x8a, 0x6b, 0x2d,
+	0x20, 0xa7, 0xe0, 0xfe, 0x19, 0xab, 0x2c, 0x12, 0x65, 0x21, 0x03, 0xf2, 0x10, 0xb5, 0xa3, 0xf9,
+	0xb4, 0x2c, 0x24, 0x79, 0x07, 0x60, 0x98, 0x28, 0xde, 0x7d, 0x88, 0xd8, 0x45, 0xb4, 0x56, 0x17,
+	0x59, 0xf1, 0x39, 0x36, 0xea, 0xbd, 0x07, 0xa9, 0x51, 0x80, 0xea, 0x9f, 0x61, 0x4b, 0x71, 0x15,
+	0xcf, 0x83, 0xa7, 0x5d, 0xeb, 0xdb, 0x42, 0xc3, 0x25, 0x7d, 0xd8, 0x31, 0x84, 0x84, 0x17, 0xb3,
+	0xec, 0x26, 0xd8, 0x47, 0x6d, 0x77, 0xad, 0x16, 0xaf, 0x61, 0x1f, 0x79, 0xd4, 0x9b, 0xde, 0xbd,
+	0x84, 0xaf, 0x61, 0xe7, 0xde, 0x15, 0x75, 0xc0, 0x9e, 0x5c, 0x0d, 0xa8, 0xff, 0x88, 0xb4, 0xc1,
+	0xd5, 0x4f, 0xe7, 0x83, 0xb3, 0xc9, 0x85, 0x6f, 0x91, 0x16, 0xe8, 0x6b, 0xed, 0x6f, 0x84, 0xef,
+	0xc0, 0xc6, 0x43, 0xf4, 0xa0, 0xfe, 0x28, 0xfd, 0x47, 0x1a, 0xed, 0xd1, 0xa1, 0x6f, 0x11, 0x17,
+	0xb6, 0x7a, 0x74, 0x78, 0xf2, 0xc6, 0xdf, 0xd0, 0xb5, 0x4f, 0x6f, 0x4f, 0xfc, 0x4d, 0x02, 0xb0,
+	0xfd, 0xe9, 0xed, 0x49, 0x74, 0xf2, 0xc6, 0xb7, 0xc3, 0x1e, 0x78, 0x8d, 0x2c, 0x7a, 0xea, 0x95,
+	0x92, 0x45, 0x37, 0x3c, 0x8f, 0x71, 0x36, 0x3a, 0xb4, 0x55, 0x4a, 0x76, 0xc1, 0xf3, 0x58, 0x7f,
+	0x24, 0x1a, 0x12, 0x53, 0x86, 0xf3, 0xd0, 0xa1, 0xdb, 0xa5, 0x64, 0x74, 0xca, 0xc2, 0xbf, 0x2d,
+	0x70, 0xea, 0xbd, 0x20, 0x04, 0xec, 0x94, 0xc9, 0x04, 0xc5, 0x2e, 0xc5, 0x67, 0x5d, 0xc3, 0xd1,
+	0x68, 0xc6, 0x28, 0x3e, 0x93, 0x03, 0x00, 0xa9, 0x62, 0xa1, 0x70, 0x16, 0xe3, 0xd0, 0xb4, 0xa9,
+	0x8b, 0x15, 0x3d, 0x82, 0xc9, 0x73, 0x70, 0x05, 0x8b, 0xe7, 0x06, 0xb5, 0x11, 0x75, 0x74, 0x01,
+	0xc1, 0x03, 0x80, 0x9c, 0xe5, 0x5c, 0x2c, 0xa3, 0x52, 0x32, 0x1c, 0x89, 0x36, 0x75, 0x4d, 0x65,
+	0x22, 0x59, 0xf8, 0xaf, 0x05, 0x9d, 0x21, 0x4f, 0xcb, 0x39, 0xbb, 0x5e, 0x2e, 0x18, 0xa6, 0xfa,
+	0xa3, 0x3e, 0x1a, 0xb9, 0x94, 0x8a, 0xe5, 0x98, 0xae, 0x73, 0xfc, 0x6a, 0xfd, 0x5d, 0xbf, 0x27,
+	0x35, 0x27, 0x75, 0x85, 0xb2, 0xc6, 0xad, 0x9f, 0xde, 0x55, 0xc9, 0xff, 0xc1, 0xcb, 0x51, 0x13,
+	0xa9, 0xe5, 0xa2, 0xee, 0x12, 0xf2, 0x95, 0x0d, 0xf9, 0x01, 0x3a, 0x45, 0x99, 0x47, 0x7c, 0x16,
+	0x99, 0xa2, 0xc4, 0x7e, 0xdb, 0x74, 0xa7, 0x28, 0xf3, 0xf1, 0xcc, 0xac, 0x27, 0xc3, 0x57, 0xd5,
+	0x49, 0x54, 0xae, 0xf7, 0x8e, 0xd3, 0x85, 0xad, 0xab, 0xf1, 0x78, 0xa4, 0xcf, 0xdd, 0x01, 0x7b,
+	0xd8, 0xbb, 0x1c, 0xf8, 0x1b, 0xe1, 0x1c, 0xfe, 0xd7, 0x17, 0x99, 0xca, 0x92, 0x78, 0x3e, 0x91,
+	0x4c, 0xfc, 0xca, 0x4b, 0x51, 0xb0, 0x65, 0x35, 0xaa, 0x56, 0x9b, 0x6e, 0x35, 0x36, 0xfd, 0x14,
+	0x5a, 0x55, 0x97, 0x98, 0xf2, 0x6b, 0x1f, 0x67, 0x63, 0xda, 0xd1, 0x5a, 0x10, 0x4e, 0xe1, 0xf9,
+	0x9a, 0xd5, 0x64, 0xbd, 0x5c, 0x1f, 0xec, 0xa4, 0xfc, 0x2c, 0x03, 0x0b, 0x6f, 0xda, 0xfa, 0x9d,
+	0xfd, 0x7a, 0x5a, 0x8a, 0xe2, 0xb3, 0xa7, 0xbf, 0x57, 0x3f, 0xf3, 0x4a, 0x11, 0xe1, 0x1f, 0xfe,
+	0xbf, 0x00, 0x00, 0x00, 0xff, 0xff, 0x51, 0x32, 0x87, 0x13, 0xf1, 0x07, 0x00, 0x00,
 }
diff --git a/ui/metrics/metrics_proto/metrics.proto b/ui/metrics/metrics_proto/metrics.proto
index 194aa6b..62cb4b8 100644
--- a/ui/metrics/metrics_proto/metrics.proto
+++ b/ui/metrics/metrics_proto/metrics.proto
@@ -92,6 +92,14 @@
 
   // The metrics for the whole build
   optional PerfInfo total = 21;
+
+  optional BuildConfig build_config = 23;
+}
+
+message BuildConfig {
+  optional bool use_goma = 1;
+
+  optional bool use_rbe = 2;
 }
 
 message PerfInfo {