milo: Add barebones BuildInfo pRPC service.

milo/api/proto/buildinfo.pb.go

Index: milo/api/proto/buildinfo.pb.go
diff --git a/milo/api/proto/buildinfo.pb.go b/milo/api/proto/buildinfo.pb.go
new file mode 100644
index 0000000000000000000000000000000000000000..9cbb80c17621c69be546ddbd6b76f40c5a396a39
--- /dev/null
+++ b/milo/api/proto/buildinfo.pb.go
@@ -0,0 +1,387 @@
+// Code generated by protoc-gen-go.
+// source: github.com/luci/luci-go/milo/api/proto/buildinfo.proto
+// DO NOT EDIT!
+
+package milo
+
+import prpc "github.com/luci/luci-go/grpc/prpc"
+
+import proto "github.com/golang/protobuf/proto"
+import fmt "fmt"
+import math "math"
+import milo1 "github.com/luci/luci-go/common/proto/milo"
+
+import (
+	context "golang.org/x/net/context"
+	grpc "google.golang.org/grpc"
+)
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = fmt.Errorf
+var _ = math.Inf
+
+type BuildInfoRequest struct {
+	// Types that are valid to be assigned to Build:
+	//	*BuildInfoRequest_Buildbot
+	//	*BuildInfoRequest_Swarming_
+	Build isBuildInfoRequest_Build `protobuf_oneof:"build"`
+	// Project hint is a LUCI project suggestion for this build. Some builds,
+	// notably older ones, may not contain enough metadata to resolve their
+	// project. Resolution may succeed if this hint is provided and correct.
+	//
+	// This field is optional, and its use is discouraged unless necessary.
+	ProjectHint string `protobuf:"bytes,11,opt,name=project_hint,json=projectHint" json:"project_hint,omitempty"`
+}
+
+func (m *BuildInfoRequest) Reset()                    { *m = BuildInfoRequest{} }
+func (m *BuildInfoRequest) String() string            { return proto.CompactTextString(m) }
+func (*BuildInfoRequest) ProtoMessage()               {}
+func (*BuildInfoRequest) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{0} }
+
+type isBuildInfoRequest_Build interface {
+	isBuildInfoRequest_Build()
+}
+
+type BuildInfoRequest_Buildbot struct {
+	Buildbot *BuildInfoRequest_BuildBot `protobuf:"bytes,1,opt,name=buildbot,oneof"`
+}
+type BuildInfoRequest_Swarming_ struct {
+	Swarming *BuildInfoRequest_Swarming `protobuf:"bytes,2,opt,name=swarming,oneof"`
+}
+
+func (*BuildInfoRequest_Buildbot) isBuildInfoRequest_Build()  {}
+func (*BuildInfoRequest_Swarming_) isBuildInfoRequest_Build() {}
+
+func (m *BuildInfoRequest) GetBuild() isBuildInfoRequest_Build {
+	if m != nil {
+		return m.Build
+	}
+	return nil
+}
+
+func (m *BuildInfoRequest) GetBuildbot() *BuildInfoRequest_BuildBot {
+	if x, ok := m.GetBuild().(*BuildInfoRequest_Buildbot); ok {
+		return x.Buildbot
+	}
+	return nil
+}
+
+func (m *BuildInfoRequest) GetSwarming() *BuildInfoRequest_Swarming {
+	if x, ok := m.GetBuild().(*BuildInfoRequest_Swarming_); ok {
+		return x.Swarming
+	}
+	return nil
+}
+
+func (m *BuildInfoRequest) GetProjectHint() string {
+	if m != nil {
+		return m.ProjectHint
+	}
+	return ""
+}
+
+// XXX_OneofFuncs is for the internal use of the proto package.
+func (*BuildInfoRequest) XXX_OneofFuncs() (func(msg proto.Message, b *proto.Buffer) error, func(msg proto.Message, tag, wire int, b *proto.Buffer) (bool, error), func(msg proto.Message) (n int), []interface{}) {
+	return _BuildInfoRequest_OneofMarshaler, _BuildInfoRequest_OneofUnmarshaler, _BuildInfoRequest_OneofSizer, []interface{}{
+		(*BuildInfoRequest_Buildbot)(nil),
+		(*BuildInfoRequest_Swarming_)(nil),
+	}
+}
+
+func _BuildInfoRequest_OneofMarshaler(msg proto.Message, b *proto.Buffer) error {
+	m := msg.(*BuildInfoRequest)
+	// build
+	switch x := m.Build.(type) {
+	case *BuildInfoRequest_Buildbot:
+		b.EncodeVarint(1<<3 | proto.WireBytes)
+		if err := b.EncodeMessage(x.Buildbot); err != nil {
+			return err
+		}
+	case *BuildInfoRequest_Swarming_:
+		b.EncodeVarint(2<<3 | proto.WireBytes)
+		if err := b.EncodeMessage(x.Swarming); err != nil {
+			return err
+		}
+	case nil:
+	default:
+		return fmt.Errorf("BuildInfoRequest.Build has unexpected type %T", x)
+	}
+	return nil
+}
+
+func _BuildInfoRequest_OneofUnmarshaler(msg proto.Message, tag, wire int, b *proto.Buffer) (bool, error) {
+	m := msg.(*BuildInfoRequest)
+	switch tag {
+	case 1: // build.buildbot
+		if wire != proto.WireBytes {
+			return true, proto.ErrInternalBadWireType
+		}
+		msg := new(BuildInfoRequest_BuildBot)
+		err := b.DecodeMessage(msg)
+		m.Build = &BuildInfoRequest_Buildbot{msg}
+		return true, err
+	case 2: // build.swarming
+		if wire != proto.WireBytes {
+			return true, proto.ErrInternalBadWireType
+		}
+		msg := new(BuildInfoRequest_Swarming)
+		err := b.DecodeMessage(msg)
+		m.Build = &BuildInfoRequest_Swarming_{msg}
+		return true, err
+	default:
+		return false, nil
+	}
+}
+
+func _BuildInfoRequest_OneofSizer(msg proto.Message) (n int) {
+	m := msg.(*BuildInfoRequest)
+	// build
+	switch x := m.Build.(type) {
+	case *BuildInfoRequest_Buildbot:
+		s := proto.Size(x.Buildbot)
+		n += proto.SizeVarint(1<<3 | proto.WireBytes)
+		n += proto.SizeVarint(uint64(s))
+		n += s
+	case *BuildInfoRequest_Swarming_:
+		s := proto.Size(x.Swarming)
+		n += proto.SizeVarint(2<<3 | proto.WireBytes)
+		n += proto.SizeVarint(uint64(s))
+		n += s
+	case nil:
+	default:
+		panic(fmt.Sprintf("proto: unexpected type %T in oneof", x))
+	}
+	return n
+}
+
+// The request for the name of a BuildBot built.
+type BuildInfoRequest_BuildBot struct {
+	// The master name.
+	MasterName string `protobuf:"bytes,1,opt,name=master_name,json=masterName" json:"master_name,omitempty"`
+	// The builder name server.
+	BuilderName string `protobuf:"bytes,2,opt,name=builder_name,json=builderName" json:"builder_name,omitempty"`
+	// The build number.
+	BuildNumber int64 `protobuf:"varint,3,opt,name=build_number,json=buildNumber" json:"build_number,omitempty"`
+}
+
+func (m *BuildInfoRequest_BuildBot) Reset()                    { *m = BuildInfoRequest_BuildBot{} }
+func (m *BuildInfoRequest_BuildBot) String() string            { return proto.CompactTextString(m) }
+func (*BuildInfoRequest_BuildBot) ProtoMessage()               {}
+func (*BuildInfoRequest_BuildBot) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{0, 0} }
+
+func (m *BuildInfoRequest_BuildBot) GetMasterName() string {
+	if m != nil {
+		return m.MasterName
+	}
+	return ""
+}
+
+func (m *BuildInfoRequest_BuildBot) GetBuilderName() string {
+	if m != nil {
+		return m.BuilderName
+	}
+	return ""
+}
+
+func (m *BuildInfoRequest_BuildBot) GetBuildNumber() int64 {
+	if m != nil {
+		return m.BuildNumber
+	}
+	return 0
+}
+
+// The request containing a Swarming task.
+type BuildInfoRequest_Swarming struct {
+	// Host is the hostname of the Swarming server to connect to
+	// (e.g., "swarming.example.com").
+	//
+	// This is optional. If omitted or empty, Milo's default Swarming server
+	// will be used.
+	Host string `protobuf:"bytes,1,opt,name=host" json:"host,omitempty"`
+	// The Swarming task name.
+	Task string `protobuf:"bytes,2,opt,name=task" json:"task,omitempty"`
+}
+
+func (m *BuildInfoRequest_Swarming) Reset()                    { *m = BuildInfoRequest_Swarming{} }
+func (m *BuildInfoRequest_Swarming) String() string            { return proto.CompactTextString(m) }
+func (*BuildInfoRequest_Swarming) ProtoMessage()               {}
+func (*BuildInfoRequest_Swarming) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{0, 1} }
+
+func (m *BuildInfoRequest_Swarming) GetHost() string {
+	if m != nil {
+		return m.Host
+	}
+	return ""
+}
+
+func (m *BuildInfoRequest_Swarming) GetTask() string {
+	if m != nil {
+		return m.Task
+	}
+	return ""
+}
+
+// The request containing the name of the master.
+type BuildInfoResponse struct {
+	// The LUCI project that this build belongs to.
+	Project string `protobuf:"bytes,1,opt,name=project" json:"project,omitempty"`
+	// The main build step.
+	Step *milo1.Step `protobuf:"bytes,2,opt,name=step" json:"step,omitempty"`
+	// The LogDog annotation stream for this build. The Prefix will be populated
+	// and can be used as the prefix for any un-prefixed LogdogStream in "step".
+	AnnotationStream *milo1.LogdogStream `protobuf:"bytes,3,opt,name=annotation_stream,json=annotationStream" json:"annotation_stream,omitempty"`
+}
+
+func (m *BuildInfoResponse) Reset()                    { *m = BuildInfoResponse{} }
+func (m *BuildInfoResponse) String() string            { return proto.CompactTextString(m) }
+func (*BuildInfoResponse) ProtoMessage()               {}
+func (*BuildInfoResponse) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{1} }
+
+func (m *BuildInfoResponse) GetProject() string {
+	if m != nil {
+		return m.Project
+	}
+	return ""
+}
+
+func (m *BuildInfoResponse) GetStep() *milo1.Step {
+	if m != nil {
+		return m.Step
+	}
+	return nil
+}
+
+func (m *BuildInfoResponse) GetAnnotationStream() *milo1.LogdogStream {
+	if m != nil {
+		return m.AnnotationStream
+	}
+	return nil
+}
+
+func init() {
+	proto.RegisterType((*BuildInfoRequest)(nil), "milo.BuildInfoRequest")
+	proto.RegisterType((*BuildInfoRequest_BuildBot)(nil), "milo.BuildInfoRequest.BuildBot")
+	proto.RegisterType((*BuildInfoRequest_Swarming)(nil), "milo.BuildInfoRequest.Swarming")
+	proto.RegisterType((*BuildInfoResponse)(nil), "milo.BuildInfoResponse")
+}
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ context.Context
+var _ grpc.ClientConn
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the grpc package it is being compiled against.
+const _ = grpc.SupportPackageIsVersion4
+
+// Client API for BuildInfo service
+
+type BuildInfoClient interface {
+	Get(ctx context.Context, in *BuildInfoRequest, opts ...grpc.CallOption) (*BuildInfoResponse, error)
+}
+type buildInfoPRPCClient struct {
+	client *prpc.Client
+}
+
+func NewBuildInfoPRPCClient(client *prpc.Client) BuildInfoClient {
+	return &buildInfoPRPCClient{client}
+}
+
+func (c *buildInfoPRPCClient) Get(ctx context.Context, in *BuildInfoRequest, opts ...grpc.CallOption) (*BuildInfoResponse, error) {
+	out := new(BuildInfoResponse)
+	err := c.client.Call(ctx, "milo.BuildInfo", "Get", in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+type buildInfoClient struct {
+	cc *grpc.ClientConn
+}
+
+func NewBuildInfoClient(cc *grpc.ClientConn) BuildInfoClient {
+	return &buildInfoClient{cc}
+}
+
+func (c *buildInfoClient) Get(ctx context.Context, in *BuildInfoRequest, opts ...grpc.CallOption) (*BuildInfoResponse, error) {
+	out := new(BuildInfoResponse)
+	err := grpc.Invoke(ctx, "/milo.BuildInfo/Get", in, out, c.cc, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+// Server API for BuildInfo service
+
+type BuildInfoServer interface {
+	Get(context.Context, *BuildInfoRequest) (*BuildInfoResponse, error)
+}
+
+func RegisterBuildInfoServer(s prpc.Registrar, srv BuildInfoServer) {
+	s.RegisterService(&_BuildInfo_serviceDesc, srv)
+}
+
+func _BuildInfo_Get_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(BuildInfoRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(BuildInfoServer).Get(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/milo.BuildInfo/Get",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(BuildInfoServer).Get(ctx, req.(*BuildInfoRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+var _BuildInfo_serviceDesc = grpc.ServiceDesc{
+	ServiceName: "milo.BuildInfo",
+	HandlerType: (*BuildInfoServer)(nil),
+	Methods: []grpc.MethodDesc{
+		{
+			MethodName: "Get",
+			Handler:    _BuildInfo_Get_Handler,
+		},
+	},
+	Streams:  []grpc.StreamDesc{},
+	Metadata: "github.com/luci/luci-go/milo/api/proto/buildinfo.proto",
+}
+
+func init() {
+	proto.RegisterFile("github.com/luci/luci-go/milo/api/proto/buildinfo.proto", fileDescriptor1)
+}
+
+var fileDescriptor1 = []byte{
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