testing: update Go to 1.19 (#5717)

.github/workflows/testing.yml

@@ -24,7 +24,7 @@ jobs:
       - name: Setup Go
         uses: actions/setup-go@v2
         with:
-          go-version: 1.18
+          go-version: 1.19
       - name: Checkout repo
         uses: actions/checkout@v2
 
@@ -44,31 +44,31 @@ jobs:
       matrix:
         include:
           - type: vet+tests
-            goversion: 1.18
+            goversion: 1.19
 
           - type: tests
-            goversion: 1.18
+            goversion: 1.19
             testflags: -race
 
           - type: tests
-            goversion: 1.18
+            goversion: 1.19
             goarch: 386
 
           - type: tests
-            goversion: 1.18
+            goversion: 1.19
             goarch: arm64
 
+          - type: tests
+            goversion: 1.18
+
           - type: tests
             goversion: 1.17
 
           - type: tests
             goversion: 1.16
 
-          - type: tests
-            goversion: 1.15
-
           - type: extras
-            goversion: 1.18
+            goversion: 1.19
 
     steps:
       # Setup the environment.

admin/admin.go

@@ -23,7 +23,7 @@
 //
 // - CSDS: https://github.com/grpc/proposal/blob/master/A40-csds-support.md
 //
-// Experimental
+// # Experimental
 //
 // Notice: All APIs in this package are experimental and may be removed in a
 // later release.

attributes/attributes.go

@@ -19,7 +19,7 @@
 // Package attributes defines a generic key/value store used in various gRPC
 // components.
 //
-// Experimental
+// # Experimental
 //
 // Notice: This package is EXPERIMENTAL and may be changed or removed in a
 // later release.

authz/rbac_translator.go

@@ -16,7 +16,7 @@
 
 // Package authz exposes methods to manage authorization within gRPC.
 //
-// Experimental
+// # Experimental
 //
 // Notice: This package is EXPERIMENTAL and may be changed or removed
 // in a later release.

backoff.go

@@ -48,7 +48,7 @@ type BackoffConfig struct {
 // here for more details:
 // https://github.com/grpc/grpc/blob/master/doc/connection-backoff.md.
 //
-// Experimental
+// # Experimental
 //
 // Notice: This type is EXPERIMENTAL and may be changed or removed in a
 // later release.

balancer/grpclb/grpc_lb_v1/load_balancer.pb.go

@@ -52,6 +52,7 @@ type LoadBalanceRequest struct {
 	unknownFields protoimpl.UnknownFields
 
 	// Types that are assignable to LoadBalanceRequestType:
+	//
 	//	*LoadBalanceRequest_InitialRequest
 	//	*LoadBalanceRequest_ClientStats
 	LoadBalanceRequestType isLoadBalanceRequest_LoadBalanceRequestType `protobuf_oneof:"load_balance_request_type"`
@@ -340,6 +341,7 @@ type LoadBalanceResponse struct {
 	unknownFields protoimpl.UnknownFields
 
 	// Types that are assignable to LoadBalanceResponseType:
+	//
 	//	*LoadBalanceResponse_InitialResponse
 	//	*LoadBalanceResponse_ServerList
 	//	*LoadBalanceResponse_FallbackResponse

balancer/grpclb/grpclb.go

@@ -19,6 +19,7 @@
 // Package grpclb defines a grpclb balancer.
 //
 // To install grpclb balancer, import this package as:
+//
 //	import _ "google.golang.org/grpc/balancer/grpclb"
 package grpclb
 
@@ -231,6 +232,7 @@ type lbBalancer struct {
 // it. The picker
 //   - always returns ErrTransientFailure if the balancer is in TransientFailure,
 //   - does two layer roundrobin pick otherwise.
+//
 // Caller must hold lb.mu.
 func (lb *lbBalancer) regeneratePicker(resetDrop bool) {
 	if lb.state == connectivity.TransientFailure {

balancer/rls/balancer.go

@@ -426,7 +426,6 @@ func (b *rlsBalancer) ExitIdle() {
 
 // sendNewPickerLocked pushes a new picker on to the channel.
 //
-//
 // Note that regardless of what connectivity state is reported, the policy will
 // return its own picker, and not a picker that unconditionally queues
 // (typically used for IDLE or CONNECTING) or a picker that unconditionally

balancer/rls/config.go

@@ -134,10 +134,13 @@ type lbConfigJSON struct {
 //	   - ignore `valid_targets` field
 //	   - `cache_size_bytes` field must have a value greater than 0, and if its
 //	     value is greater than 5M, we cap it at 5M
+//
 //	- routeLookupChannelServiceConfig:
 //	  - if specified, must parse as valid service config
+//
 //	- childPolicy:
 //	  - must find a valid child policy with a valid config
+//
 //	- childPolicyConfigTargetFieldName:
 //	  - must be set and non-empty
 func (rlsBB) ParseConfig(c json.RawMessage) (serviceconfig.LoadBalancingConfig, error) {

balancer/rls/internal/adaptive/adaptive.go

@@ -45,17 +45,17 @@ const (
 // The throttler has the following knobs for which we will use defaults for
 // now. If there is a need to make them configurable at a later point in time,
 // support for the same will be added.
-// * Duration: amount of recent history that will be taken into account for
+//   - Duration: amount of recent history that will be taken into account for
 //     making client-side throttling decisions. A default of 30 seconds is used.
-// * Bins: number of bins to be used for bucketing historical data. A default
+//   - Bins: number of bins to be used for bucketing historical data. A default
 //     of 100 is used.
-// * RatioForAccepts: ratio by which accepts are multiplied, typically a value
+//   - RatioForAccepts: ratio by which accepts are multiplied, typically a value
 //     slightly larger than 1.0. This is used to make the throttler behave as if
 //     the backend had accepted more requests than it actually has, which lets us
 //     err on the side of sending to the backend more requests than we think it
 //     will accept for the sake of speeding up the propagation of state. A
 //     default of 2.0 is used.
-// * RequestsPadding: is used to decrease the (client-side) throttling
+//   - RequestsPadding: is used to decrease the (client-side) throttling
 //     probability in the low QPS regime (to speed up propagation of state), as
 //     well as to safeguard against hitting a client-side throttling probability
 //     of 100%. The weight of this value decreases as the number of requests in

balancer/weightedroundrobin/weightedroundrobin.go

@@ -45,7 +45,7 @@ func (a AddrInfo) Equal(o interface{}) bool {
 // SetAddrInfo returns a copy of addr in which the BalancerAttributes field is
 // updated with addrInfo.
 //
-// Experimental
+// # Experimental
 //
 // Notice: This API is EXPERIMENTAL and may be changed or removed in a
 // later release.
@@ -57,7 +57,7 @@ func SetAddrInfo(addr resolver.Address, addrInfo AddrInfo) resolver.Address {
 // GetAddrInfo returns the AddrInfo stored in the BalancerAttributes field of
 // addr.
 //
-// Experimental
+// # Experimental
 //
 // Notice: This API is EXPERIMENTAL and may be changed or removed in a
 // later release.

benchmark/benchmain/main.go

@@ -21,7 +21,7 @@ Package main provides benchmark with setting flags.
 
 An example to run some benchmarks with profiling enabled:
 
-go run benchmark/benchmain/main.go -benchtime=10s -workloads=all \
+	go run benchmark/benchmain/main.go -benchtime=10s -workloads=all \
 	  -compression=gzip -maxConcurrentCalls=1 -trace=off \
 	  -reqSizeBytes=1,1048576 -respSizeBytes=1,1048576 -networkMode=Local \
 	  -cpuProfile=cpuProf -memProfile=memProf -memProfileRate=10000 -resultFile=result
@@ -32,6 +32,7 @@ work, you can get the benchmark result and compare it with the base anytime.
 
 Assume there are two result files names as "basePerf" and "curPerf" created by adding
 -resultFile=basePerf and -resultFile=curPerf.
+
 		To format the curPerf, run:
 	  	go run benchmark/benchresult/main.go curPerf
 		To observe how the performance changes based on a base result, run:

benchmark/benchresult/main.go

@@ -18,12 +18,14 @@
 
 /*
 To format the benchmark result:
+
 	go run benchmark/benchresult/main.go resultfile
 
 To see the performance change based on a old result:
-  go run benchmark/benchresult/main.go resultfile_old resultfile
-It will print the comparison result of intersection benchmarks between two files.
 
+	go run benchmark/benchresult/main.go resultfile_old resultfile
+
+It will print the comparison result of intersection benchmarks between two files.
 */
 package main
 

benchmark/server/main.go

@@ -20,6 +20,7 @@
 Package main provides a server used for benchmarking.  It launches a server
 which is listening on port 50051.  An example to start the server can be found
 at:
+
 	go run benchmark/server/main.go -test_name=grpc_test
 
 After starting the server, the client can be run separately and used to test

binarylog/grpc_binarylog_v1/binarylog.pb.go

@@ -261,6 +261,7 @@ type GrpcLogEntry struct {
 	// according to the type of the log entry.
 	//
 	// Types that are assignable to Payload:
+	//
 	//	*GrpcLogEntry_ClientHeader
 	//	*GrpcLogEntry_ServerHeader
 	//	*GrpcLogEntry_Message

channelz/channelz.go

@@ -23,7 +23,7 @@
 // https://github.com/grpc/proposal/blob/master/A14-channelz.md, is provided by
 // the `internal/channelz` package.
 //
-// Experimental
+// # Experimental
 //
 // Notice: All APIs in this package are experimental and may be removed in a
 // later release.

channelz/grpc_channelz_v1/channelz.pb.go

@@ -514,6 +514,7 @@ type ChannelTraceEvent struct {
 	// created.
 	//
 	// Types that are assignable to ChildRef:
+	//
 	//	*ChannelTraceEvent_ChannelRef
 	//	*ChannelTraceEvent_SubchannelRef
 	ChildRef isChannelTraceEvent_ChildRef `protobuf_oneof:"child_ref"`
@@ -1338,6 +1339,7 @@ type Address struct {
 	unknownFields protoimpl.UnknownFields
 
 	// Types that are assignable to Address:
+	//
 	//	*Address_TcpipAddress
 	//	*Address_UdsAddress_
 	//	*Address_OtherAddress_
@@ -1433,6 +1435,7 @@ type Security struct {
 	unknownFields protoimpl.UnknownFields
 
 	// Types that are assignable to Model:
+	//
 	//	*Security_Tls_
 	//	*Security_Other
 	Model isSecurity_Model `protobuf_oneof:"model"`
@@ -2908,6 +2911,7 @@ type Security_Tls struct {
 	unknownFields protoimpl.UnknownFields
 
 	// Types that are assignable to CipherSuite:
+	//
 	//	*Security_Tls_StandardName
 	//	*Security_Tls_OtherName
 	CipherSuite isSecurity_Tls_CipherSuite `protobuf_oneof:"cipher_suite"`

clientconn.go

@@ -503,7 +503,7 @@ type ClientConn struct {
 // WaitForStateChange waits until the connectivity.State of ClientConn changes from sourceState or
 // ctx expires. A true value is returned in former case and false in latter.
 //
-// Experimental
+// # Experimental
 //
 // Notice: This API is EXPERIMENTAL and may be changed or removed in a
 // later release.
@@ -522,7 +522,7 @@ func (cc *ClientConn) WaitForStateChange(ctx context.Context, sourceState connec
 
 // GetState returns the connectivity.State of ClientConn.
 //
-// Experimental
+// # Experimental
 //
 // Notice: This API is EXPERIMENTAL and may be changed or removed in a later
 // release.
@@ -534,7 +534,7 @@ func (cc *ClientConn) GetState() connectivity.State {
 // the channel is idle.  Does not wait for the connection attempts to begin
 // before returning.
 //
-// Experimental
+// # Experimental
 //
 // Notice: This API is EXPERIMENTAL and may be changed or removed in a later
 // release.
@@ -761,7 +761,7 @@ func (cc *ClientConn) channelzMetric() *channelz.ChannelInternalMetric {
 
 // Target returns the target string of the ClientConn.
 //
-// Experimental
+// # Experimental
 //
 // Notice: This API is EXPERIMENTAL and may be changed or removed in a
 // later release.
@@ -998,7 +998,7 @@ func (cc *ClientConn) resolveNow(o resolver.ResolveNowOptions) {
 // However, if a previously unavailable network becomes available, this may be
 // used to trigger an immediate reconnect.
 //
-// Experimental
+// # Experimental
 //
 // Notice: This API is EXPERIMENTAL and may be changed or removed in a
 // later release.

cmd/protoc-gen-go-grpc/main.go

@@ -19,14 +19,17 @@
 // protoc-gen-go-grpc is a plugin for the Google protocol buffer compiler to
 // generate Go code. Install it by building this program and making it
 // accessible within your PATH with the name:
+//
 //	protoc-gen-go-grpc
 //
 // The 'go-grpc' suffix becomes part of the argument for the protocol compiler,
 // such that it can be invoked as:
+//
 //	protoc --go-grpc_out=. path/to/file.proto
 //
 // This generates Go service definitions for the protocol buffer defined by
 // file.proto.  With that input, the output will be written to:
+//
 //	path/to/file_grpc.pb.go
 package main
 

credentials/alts/internal/proto/grpc_gcp/handshaker.pb.go

@@ -216,6 +216,7 @@ type Identity struct {
 	unknownFields protoimpl.UnknownFields
 
 	// Types that are assignable to IdentityOneof:
+	//
 	//	*Identity_ServiceAccount
 	//	*Identity_Hostname
 	IdentityOneof isIdentity_IdentityOneof `protobuf_oneof:"identity_oneof"`
@@ -664,6 +665,7 @@ type HandshakerReq struct {
 	unknownFields protoimpl.UnknownFields
 
 	// Types that are assignable to ReqOneof:
+	//
 	//	*HandshakerReq_ClientStart
 	//	*HandshakerReq_ServerStart
 	//	*HandshakerReq_Next

credentials/google/xds.go

@@ -40,6 +40,7 @@ const cfeClusterAuthorityName = "traffic-director-c2p.xds.googleapis.com"
 //     "xdstp://traffic-director-c2p.xds.googleapis.com/envoy.config.cluster.v3.Cluster/google_cfe_",
 //     use TLS
 //   - otherwise, use ALTS
+//
 // - else, do TLS
 //
 // On the server, ServerHandshake always does TLS.

credentials/local/local.go

@@ -23,7 +23,7 @@
 // reported. If local credentials is not used in local connections
 // (local TCP or UDS), it will fail.
 //
-// Experimental
+// # Experimental
 //
 // Notice: This package is EXPERIMENTAL and may be changed or removed in a
 // later release.

credentials/sts/sts.go

@@ -19,7 +19,7 @@
 // Package sts implements call credentials using STS (Security Token Service) as
 // defined in https://tools.ietf.org/html/rfc8693.
 //
-// Experimental
+// # Experimental
 //
 // Notice: All APIs in this package are experimental and may be changed or
 // removed in a later release.

credentials/tls.go

@@ -195,7 +195,7 @@ func NewServerTLSFromFile(certFile, keyFile string) (TransportCredentials, error
 // TLSChannelzSecurityValue defines the struct that TLS protocol should return
 // from GetSecurityValue(), containing security info like cipher and certificate used.
 //
-// Experimental
+// # Experimental
 //
 // Notice: This type is EXPERIMENTAL and may be changed or removed in a
 // later release.

credentials/tls/certprovider/pemfile/watcher.go

@@ -19,7 +19,7 @@
 // Package pemfile provides a file watching certificate provider plugin
 // implementation which works for files with PEM contents.
 //
-// Experimental
+// # Experimental
 //
 // Notice: All APIs in this package are experimental and may be removed in a
 // later release.

credentials/tls/certprovider/provider.go

@@ -18,7 +18,7 @@
 
 // Package certprovider defines APIs for Certificate Providers in gRPC.
 //
-// Experimental
+// # Experimental
 //
 // Notice: All APIs in this package are experimental and may be removed in a
 // later release.

encoding/encoding.go

@@ -19,7 +19,7 @@
 // Package encoding defines the interface for the compressor and codec, and
 // functions to register and retrieve compressors and codecs.
 //
-// Experimental
+// # Experimental
 //
 // Notice: This package is EXPERIMENTAL and may be changed or removed in a
 // later release.

encoding/gzip/gzip.go

@@ -19,7 +19,7 @@
 // Package gzip implements and registers the gzip compressor
 // during the initialization.
 //
-// Experimental
+// # Experimental
 //
 // Notice: This package is EXPERIMENTAL and may be changed or removed in a
 // later release.

gcp/observability/observability.go

@@ -19,7 +19,7 @@
 // Package observability implements the tracing, metrics, and logging data
 // collection, and provides controlling knobs via a config file.
 //
-// Experimental
+// # Experimental
 //
 // Notice: This package is EXPERIMENTAL and may be changed or removed in a
 // later release.

grpclog/loggerv2.go

@@ -242,7 +242,7 @@ func (g *loggerT) V(l int) bool {
 // DepthLoggerV2, the below functions will be called with the appropriate stack
 // depth set for trivial functions the logger may ignore.
 //
-// Experimental
+// # Experimental
 //
 // Notice: This type is EXPERIMENTAL and may be changed or removed in a
 // later release.

grpclog/loggerv2_test.go

@@ -52,6 +52,7 @@ func TestLoggerV2Severity(t *testing.T) {
 }
 
 // check if b is in the format of:
+//
 //	2017/04/07 14:55:42 WARNING: WARNING
 func checkLogForSeverity(s int, b []byte) error {
 	expected := regexp.MustCompile(fmt.Sprintf(`^[0-9]{4}/[0-9]{2}/[0-9]{2} [0-9]{2}:[0-9]{2}:[0-9]{2} %s: %s\n$`, severityName[s], severityName[s]))

internal/balancergroup/balancergroup_test.go

@@ -169,6 +169,7 @@ func (s) TestBalancerGroup_start_close(t *testing.T) {
 // The potential deadlock can happen if we
 //   - hold a lock and send updates to balancer (e.g. update resolved addresses)
 //   - the balancer calls back (NewSubConn or update picker) in line
+//
 // The callback will try to hold hte same lock again, which will cause a
 // deadlock.
 //

internal/grpclog/grpclog.go

@@ -110,7 +110,7 @@ type LoggerV2 interface {
 // This is a copy of the DepthLoggerV2 defined in the external grpclog package.
 // It is defined here to avoid a circular dependency.
 //
-// Experimental
+// # Experimental
 //
 // Notice: This type is EXPERIMENTAL and may be changed or removed in a
 // later release.

internal/grpctest/grpctest.go

@@ -79,9 +79,11 @@ func getTestFunc(t *testing.T, xv reflect.Value, name string) func(*testing.T) {
 // functions, respectively.
 //
 // For example usage, see example_test.go.  Run it using:
+//
 //	$ go test -v -run TestExample .
 //
 // To run a specific test/subtest:
+//
 //	$ go test -v -run 'TestExample/^Something$' .
 func RunSubTests(t *testing.T, x interface{}) {
 	xt := reflect.TypeOf(x)

internal/grpcutil/method.go

@@ -25,7 +25,6 @@ import (
 
 // ParseMethod splits service and method from the input. It expects format
 // "/service/method".
-//
 func ParseMethod(methodName string) (service, method string, _ error) {
 	if !strings.HasPrefix(methodName, "/") {
 		return "", "", errors.New("invalid method name: should start with /")

internal/hierarchy/hierarchy.go

@@ -70,16 +70,19 @@ func Set(addr resolver.Address, path []string) resolver.Address {
 //
 // Input:
 // [
+//
 //	{addr0, path: [p0, wt0]}
 //	{addr1, path: [p0, wt1]}
 //	{addr2, path: [p1, wt2]}
 //	{addr3, path: [p1, wt3]}
+//
 // ]
 //
 // Addresses will be split into p0/p1, and the p0/p1 will be removed from the
 // path.
 //
 // Output:
+//
 //	{
 //	  p0: [
 //	    {addr0, path: [wt0]},

internal/proto/grpc_lookup_v1/rls_config.pb.go

@@ -204,8 +204,10 @@ func (x *GrpcKeyBuilder) GetConstantKeys() map[string]string {
 //
 // For a service where the project id can be expressed either as a subdomain or
 // in the path, separate HttpKeyBuilders must be used:
+//
 //	host_pattern: 'example.com' path_pattern: '/{id}/{object}/**'
 //	host_pattern: '{id}.example.com' path_pattern: '/{object}/**'
+//
 // If the host is exactly 'example.com', the first path segment will be used as
 // the id and the second segment as the object. If the host has a subdomain, the
 // subdomain will be used as the id and the first segment as the object. If
@@ -244,6 +246,7 @@ type HttpKeyBuilder struct {
 	//   - "{<name>=...}": One or more segment capture, where "..." can be any
 	//     template that does not include a capture.
 	//   - "{<name>}": A single segment capture. Identical to {<name>=*}.
+	//
 	// A custom method may also be specified by appending ":" and the custom
 	// method name or "*" to indicate any custom method (including no custom
 	// method).  For example, "/*/projects/{project_id}/**:*" extracts

internal/transport/handler_server.go

@@ -442,10 +442,10 @@ func (ht *serverHandlerTransport) Drain() {
 // mapRecvMsgError returns the non-nil err into the appropriate
 // error value as expected by callers of *grpc.parser.recvMsg.
 // In particular, in can only be:
-//   * io.EOF
-//   * io.ErrUnexpectedEOF
-//   * of type transport.ConnectionError
-//   * an error from the status package
+//   - io.EOF
+//   - io.ErrUnexpectedEOF
+//   - of type transport.ConnectionError
+//   - an error from the status package
 func mapRecvMsgError(err error) error {
 	if err == io.EOF || err == io.ErrUnexpectedEOF {
 		return err

internal/transport/transport_test.go

@@ -2005,7 +2005,7 @@ func (s) TestPingPong1MB(t *testing.T) {
 	runPingPongTest(t, 1048576)
 }
 
-//This is a stress-test of flow control logic.
+// This is a stress-test of flow control logic.
 func runPingPongTest(t *testing.T, msgSize int) {
 	server, client, cancel := setUp(t, 0, 0, pingpong)
 	defer cancel()

interop/grpc_testing/control.pb.go

@@ -300,6 +300,7 @@ type LoadParams struct {
 	unknownFields protoimpl.UnknownFields
 
 	// Types that are assignable to Load:
+	//
 	//	*LoadParams_ClosedLoop
 	//	*LoadParams_Poisson
 	Load isLoadParams_Load `protobuf_oneof:"load"`
@@ -445,6 +446,7 @@ type ChannelArg struct {
 
 	Name string `protobuf:"bytes,1,opt,name=name,proto3" json:"name,omitempty"`
 	// Types that are assignable to Value:
+	//
 	//	*ChannelArg_StrValue
 	//	*ChannelArg_IntValue
 	Value isChannelArg_Value `protobuf_oneof:"value"`
@@ -834,6 +836,7 @@ type ClientArgs struct {
 	unknownFields protoimpl.UnknownFields
 
 	// Types that are assignable to Argtype:
+	//
 	//	*ClientArgs_Setup
 	//	*ClientArgs_Mark
 	Argtype isClientArgs_Argtype `protobuf_oneof:"argtype"`
@@ -1061,6 +1064,7 @@ type ServerArgs struct {
 	unknownFields protoimpl.UnknownFields
 
 	// Types that are assignable to Argtype:
+	//
 	//	*ServerArgs_Setup
 	//	*ServerArgs_Mark
 	Argtype isServerArgs_Argtype `protobuf_oneof:"argtype"`

interop/grpc_testing/core/stats.pb.go

@@ -148,6 +148,7 @@ type Metric struct {
 
 	Name string `protobuf:"bytes,1,opt,name=name,proto3" json:"name,omitempty"`
 	// Types that are assignable to Value:
+	//
 	//	*Metric_Count
 	//	*Metric_Histogram
 	Value isMetric_Value `protobuf_oneof:"value"`

interop/grpc_testing/empty.pb.go

@@ -46,7 +46,6 @@ const _ = proto.ProtoPackageIsVersion4
 //	service Foo {
 //	  rpc Bar (grpc.testing.Empty) returns (grpc.testing.Empty) { };
 //	};
-//
 type Empty struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache

interop/grpc_testing/payloads.pb.go

@@ -193,6 +193,7 @@ type PayloadConfig struct {
 	unknownFields protoimpl.UnknownFields
 
 	// Types that are assignable to Payload:
+	//
 	//	*PayloadConfig_BytebufParams
 	//	*PayloadConfig_SimpleParams
 	//	*PayloadConfig_ComplexParams

interop/xds/client/client.go

@@ -340,6 +340,7 @@ type rpcConfig struct {
 }
 
 // parseRPCMetadata turns EmptyCall:key1:value1 into
+//
 //	{typ: emptyCall, md: {key1:value1}}.
 func parseRPCMetadata(rpcMetadataStr string, rpcs []string) []*rpcConfig {
 	rpcMetadataSplit := strings.Split(rpcMetadataStr, ",")

metadata/metadata.go

@@ -45,6 +45,7 @@ type MD map[string][]string
 //   - uppercase letters: A-Z (normalized to lower)
 //   - lowercase letters: a-z
 //   - special characters: -_.
+//
 // Uppercase letters are automatically converted to lowercase.
 //
 // Keys beginning with "grpc-" are reserved for grpc-internal use only and may
@@ -66,6 +67,7 @@ func New(m map[string]string) MD {
 //   - uppercase letters: A-Z (normalized to lower)
 //   - lowercase letters: a-z
 //   - special characters: -_.
+//
 // Uppercase letters are automatically converted to lowercase.
 //
 // Keys beginning with "grpc-" are reserved for grpc-internal use only and may
@@ -196,7 +198,7 @@ func FromIncomingContext(ctx context.Context) (MD, bool) {
 // ValueFromIncomingContext returns the metadata value corresponding to the metadata
 // key from the incoming metadata if it exists. Key must be lower-case.
 //
-// Experimental
+// # Experimental
 //
 // Notice: This API is EXPERIMENTAL and may be changed or removed in a
 // later release.

orca/orca.go

@@ -20,7 +20,7 @@
 // Envoy) on the data plane. In a proxyless world with gRPC enabled
 // applications, aggregation of such reports will be done by the gRPC client.
 //
-// Experimental
+// # Experimental
 //
 // Notice: All APIs is this package are EXPERIMENTAL and may be changed or
 // removed in a later release.

preloader.go

@@ -25,7 +25,7 @@ import (
 
 // PreparedMsg is responsible for creating a Marshalled and Compressed object.
 //
-// Experimental
+// # Experimental
 //
 // Notice: This type is EXPERIMENTAL and may be changed or removed in a
 // later release.

profiling/profiling.go

@@ -18,7 +18,7 @@
 
 // Package profiling exposes methods to manage profiling within gRPC.
 //
-// Experimental
+// # Experimental
 //
 // Notice: This package is EXPERIMENTAL and may be changed or removed in a
 // later release.

profiling/service/service.go

@@ -21,7 +21,7 @@
 // queried by a client to remotely manage the gRPC profiling behaviour of an
 // application.
 //
-// Experimental
+// # Experimental
 //
 // Notice: This package is EXPERIMENTAL and may be changed or removed in a
 // later release.

reflection/grpc_reflection_v1alpha/reflection.pb.go

@@ -53,6 +53,7 @@ type ServerReflectionRequest struct {
 	// defined field and then handles them using corresponding methods.
 	//
 	// Types that are assignable to MessageRequest:
+	//
 	//	*ServerReflectionRequest_FileByFilename
 	//	*ServerReflectionRequest_FileContainingSymbol
 	//	*ServerReflectionRequest_FileContainingExtension
@@ -263,6 +264,7 @@ type ServerReflectionResponse struct {
 	// message_request in the request.
 	//
 	// Types that are assignable to MessageResponse:
+	//
 	//	*ServerReflectionResponse_FileDescriptorResponse
 	//	*ServerReflectionResponse_AllExtensionNumbersResponse
 	//	*ServerReflectionResponse_ListServicesResponse

reflection/grpc_testing_not_regenerate/testv3.pb.go

@@ -23,9 +23,11 @@
 Package grpc_testing_not_regenerate is a generated protocol buffer package.
 
 It is generated from these files:
+
 	testv3.proto
 
 It has these top-level messages:
+
 	SearchResponseV3
 	SearchRequestV3
 */

reflection/serverreflection.go

@@ -23,6 +23,7 @@ The service implemented is defined in:
 https://github.com/grpc/grpc/blob/master/src/proto/grpc/reflection/v1alpha/reflection.proto.
 
 To register server reflection on a gRPC server:
+
 	import "google.golang.org/grpc/reflection"
 
 	s := grpc.NewServer()
@@ -32,7 +33,6 @@ To register server reflection on a gRPC server:
 	reflection.Register(s)
 
 	s.Serve(lis)
-
 */
 package reflection // import "google.golang.org/grpc/reflection"
 
@@ -74,7 +74,7 @@ func Register(s GRPCServer) {
 // for a custom implementation to return zero values for the
 // grpc.ServiceInfo values in the map.
 //
-// Experimental
+// # Experimental
 //
 // Notice: This type is EXPERIMENTAL and may be changed or removed in a
 // later release.
@@ -85,7 +85,7 @@ type ServiceInfoProvider interface {
 // ExtensionResolver is the interface used to query details about extensions.
 // This interface is satisfied by protoregistry.GlobalTypes.
 //
-// Experimental
+// # Experimental
 //
 // Notice: This type is EXPERIMENTAL and may be changed or removed in a
 // later release.
@@ -96,7 +96,7 @@ type ExtensionResolver interface {
 
 // ServerOptions represents the options used to construct a reflection server.
 //
-// Experimental
+// # Experimental
 //
 // Notice: This type is EXPERIMENTAL and may be changed or removed in a
 // later release.
@@ -120,7 +120,7 @@ type ServerOptions struct {
 // This can be used to customize behavior of the reflection service. Most usages
 // should prefer to use Register instead.
 //
-// Experimental
+// # Experimental
 //
 // Notice: This function is EXPERIMENTAL and may be changed or removed in a
 // later release.

resolver/resolver.go

@@ -96,7 +96,7 @@ const (
 
 // Address represents a server the client connects to.
 //
-// Experimental
+// # Experimental
 //
 // Notice: This type is EXPERIMENTAL and may be changed or removed in a
 // later release.

rpc_util.go

@@ -198,7 +198,7 @@ func Header(md *metadata.MD) CallOption {
 // HeaderCallOption is a CallOption for collecting response header metadata.
 // The metadata field will be populated *after* the RPC completes.
 //
-// Experimental
+// # Experimental
 //
 // Notice: This type is EXPERIMENTAL and may be changed or removed in a
 // later release.
@@ -220,7 +220,7 @@ func Trailer(md *metadata.MD) CallOption {
 // TrailerCallOption is a CallOption for collecting response trailer metadata.
 // The metadata field will be populated *after* the RPC completes.
 //
-// Experimental
+// # Experimental
 //
 // Notice: This type is EXPERIMENTAL and may be changed or removed in a
 // later release.
@@ -242,7 +242,7 @@ func Peer(p *peer.Peer) CallOption {
 // PeerCallOption is a CallOption for collecting the identity of the remote
 // peer. The peer field will be populated *after* the RPC completes.
 //
-// Experimental
+// # Experimental
 //
 // Notice: This type is EXPERIMENTAL and may be changed or removed in a
 // later release.
@@ -282,7 +282,7 @@ func FailFast(failFast bool) CallOption {
 // FailFastCallOption is a CallOption for indicating whether an RPC should fail
 // fast or not.
 //
-// Experimental
+// # Experimental
 //
 // Notice: This type is EXPERIMENTAL and may be changed or removed in a
 // later release.
@@ -305,7 +305,7 @@ func MaxCallRecvMsgSize(bytes int) CallOption {
 // MaxRecvMsgSizeCallOption is a CallOption that indicates the maximum message
 // size in bytes the client can receive.
 //
-// Experimental
+// # Experimental
 //
 // Notice: This type is EXPERIMENTAL and may be changed or removed in a
 // later release.
@@ -328,7 +328,7 @@ func MaxCallSendMsgSize(bytes int) CallOption {
 // MaxSendMsgSizeCallOption is a CallOption that indicates the maximum message
 // size in bytes the client can send.
 //
-// Experimental
+// # Experimental
 //
 // Notice: This type is EXPERIMENTAL and may be changed or removed in a
 // later release.
@@ -351,7 +351,7 @@ func PerRPCCredentials(creds credentials.PerRPCCredentials) CallOption {
 // PerRPCCredsCallOption is a CallOption that indicates the per-RPC
 // credentials to use for the call.
 //
-// Experimental
+// # Experimental
 //
 // Notice: This type is EXPERIMENTAL and may be changed or removed in a
 // later release.
@@ -369,7 +369,7 @@ func (o PerRPCCredsCallOption) after(c *callInfo, attempt *csAttempt) {}
 // sending the request.  If WithCompressor is also set, UseCompressor has
 // higher priority.
 //
-// Experimental
+// # Experimental
 //
 // Notice: This API is EXPERIMENTAL and may be changed or removed in a
 // later release.
@@ -379,7 +379,7 @@ func UseCompressor(name string) CallOption {
 
 // CompressorCallOption is a CallOption that indicates the compressor to use.
 //
-// Experimental
+// # Experimental
 //
 // Notice: This type is EXPERIMENTAL and may be changed or removed in a
 // later release.
@@ -416,7 +416,7 @@ func CallContentSubtype(contentSubtype string) CallOption {
 // ContentSubtypeCallOption is a CallOption that indicates the content-subtype
 // used for marshaling messages.
 //
-// Experimental
+// # Experimental
 //
 // Notice: This type is EXPERIMENTAL and may be changed or removed in a
 // later release.
@@ -444,7 +444,7 @@ func (o ContentSubtypeCallOption) after(c *callInfo, attempt *csAttempt) {}
 // This function is provided for advanced users; prefer to use only
 // CallContentSubtype to select a registered codec instead.
 //
-// Experimental
+// # Experimental
 //
 // Notice: This API is EXPERIMENTAL and may be changed or removed in a
 // later release.
@@ -455,7 +455,7 @@ func ForceCodec(codec encoding.Codec) CallOption {
 // ForceCodecCallOption is a CallOption that indicates the codec used for
 // marshaling messages.
 //
-// Experimental
+// # Experimental
 //
 // Notice: This type is EXPERIMENTAL and may be changed or removed in a
 // later release.
@@ -480,7 +480,7 @@ func CallCustomCodec(codec Codec) CallOption {
 // CustomCodecCallOption is a CallOption that indicates the codec used for
 // marshaling messages.
 //
-// Experimental
+// # Experimental
 //
 // Notice: This type is EXPERIMENTAL and may be changed or removed in a
 // later release.
@@ -497,7 +497,7 @@ func (o CustomCodecCallOption) after(c *callInfo, attempt *csAttempt) {}
 // MaxRetryRPCBufferSize returns a CallOption that limits the amount of memory
 // used for buffering this RPC's requests for retry purposes.
 //
-// Experimental
+// # Experimental
 //
 // Notice: This API is EXPERIMENTAL and may be changed or removed in a
 // later release.
@@ -508,7 +508,7 @@ func MaxRetryRPCBufferSize(bytes int) CallOption {
 // MaxRetryRPCBufferSizeCallOption is a CallOption indicating the amount of
 // memory to be used for caching this RPC for retry purposes.
 //
-// Experimental
+// # Experimental
 //
 // Notice: This type is EXPERIMENTAL and may be changed or removed in a
 // later release.
@@ -548,10 +548,11 @@ type parser struct {
 // format. The caller owns the returned msg memory.
 //
 // If there is an error, possible values are:
-//   * io.EOF, when no messages remain
-//   * io.ErrUnexpectedEOF
-//   * of type transport.ConnectionError
-//   * an error from the status package
+//   - io.EOF, when no messages remain
+//   - io.ErrUnexpectedEOF
+//   - of type transport.ConnectionError
+//   - an error from the status package
+//
 // No other error values or types must be returned, which also means
 // that the underlying io.Reader must not return an incompatible
 // error.

security/advancedtls/crl.go

@@ -150,12 +150,12 @@ func x509NameHash(r pkix.RDNSequence) string {
 
 // CheckRevocation checks the connection for revoked certificates based on RFC5280.
 // This implementation has the following major limitations:
-// 	* Indirect CRL files are not supported.
-// 	* CRL loading is only supported from directories in the X509_LOOKUP_hash_dir format.
-// 	* OnlySomeReasons is not supported.
-// 	* Delta CRL files are not supported.
-// 	* Certificate CRLDistributionPoint must be URLs, but are then ignored and converted into a file path.
-// 	* CRL checks are done after path building, which goes against RFC4158.
+//   - Indirect CRL files are not supported.
+//   - CRL loading is only supported from directories in the X509_LOOKUP_hash_dir format.
+//   - OnlySomeReasons is not supported.
+//   - Delta CRL files are not supported.
+//   - Certificate CRLDistributionPoint must be URLs, but are then ignored and converted into a file path.
+//   - CRL checks are done after path building, which goes against RFC4158.
 func CheckRevocation(conn tls.ConnectionState, cfg RevocationConfig) error {
 	return CheckChainRevocation(conn.VerifiedChains, cfg)
 }

security/authorization/engine/engine.go

@@ -253,13 +253,16 @@ func getDecision(engine *policyEngine, match bool) Decision {
 	return DecisionDeny
 }
 
-// Returns the authorization decision of a single policy engine based on activation.
-// If any policy matches, the decision matches the engine's action, and the first
-//  matching policy name will be returned.
-// Else if any policy is missing attributes, the decision is unknown, and the list of
-//  policy names that can't be evaluated due to missing attributes will be returned.
-// Else, the decision is the opposite of the engine's action, i.e. an ALLOW engine
-//  will return DecisionDeny, and vice versa.
+// Returns the authorization decision of a single policy engine based on
+// activation.  If any policy matches, the decision matches the engine's
+// action, and the first matching policy name will be returned.
+//
+// Else if any policy is missing attributes, the decision is unknown, and the
+// list of policy names that can't be evaluated due to missing attributes will
+// be returned.
+//
+// Else, the decision is the opposite of the engine's action, i.e. an ALLOW
+// engine will return DecisionDeny, and vice versa.
 func (engine *policyEngine) evaluate(activation interpreter.Activation) (Decision, []string) {
 	unknownPolicyNames := []string{}
 	for policyName, program := range engine.programs {

serviceconfig/serviceconfig.go

@@ -19,7 +19,7 @@
 // Package serviceconfig defines types and methods for operating on gRPC
 // service configs.
 //
-// Experimental
+// # Experimental
 //
 // Notice: This package is EXPERIMENTAL and may be changed or removed in a
 // later release.

stress/grpc_testing/metrics.pb.go

@@ -54,6 +54,7 @@ type GaugeResponse struct {
 
 	Name string `protobuf:"bytes,1,opt,name=name,proto3" json:"name,omitempty"`
 	// Types that are assignable to Value:
+	//
 	//	*GaugeResponse_LongValue
 	//	*GaugeResponse_DoubleValue
 	//	*GaugeResponse_StringValue

tap/tap.go

@@ -19,7 +19,7 @@
 // Package tap defines the function handles which are executed on the transport
 // layer of gRPC-Go and related information.
 //
-// Experimental
+// # Experimental
 //
 // Notice: This API is EXPERIMENTAL and may be changed or removed in a
 // later release.

xds/bootstrap/bootstrap.go

@@ -19,7 +19,7 @@
 // Package bootstrap provides the functionality to register possible options
 // for aspects of the xDS client through the bootstrap file.
 //
-// Experimental
+// # Experimental
 //
 // Notice: This package is EXPERIMENTAL and may be changed or removed
 // in a later release.

xds/internal/balancer/priority/balancer_priority.go

@@ -41,30 +41,44 @@ var (
 // from a priority to another).
 //
 // It's guaranteed that after this function returns:
-// - If some child is READY, it is childInUse, and all lower priorities are
+//
+//	If some child is READY, it is childInUse, and all lower priorities are
 //	closed.
-// - If some child is newly started(in Connecting for the first time), it is
+//
+//	If some child is newly started(in Connecting for the first time), it is
 //	childInUse, and all lower priorities are closed.
-// - Otherwise, the lowest priority is childInUse (none of the children is
+//
+//	Otherwise, the lowest priority is childInUse (none of the children is
 //	ready, and the overall state is not ready).
 //
 // Steps:
-// - If all priorities were deleted, unset childInUse (to an empty string), and
+//
+//	If all priorities were deleted, unset childInUse (to an empty string), and
 //	set parent ClientConn to TransientFailure
-// - Otherwise, Scan all children from p0, and check balancer stats:
-//   - For any of the following cases:
-//     - If balancer is not started (not built), this is either a new child with
+//
+//	Otherwise, Scan all children from p0, and check balancer stats:
+//
+//	  For any of the following cases:
+//
+//	    If balancer is not started (not built), this is either a new child with
 //	    high priority, or a new builder for an existing child.
-//     - If balancer is Connecting and has non-nil initTimer (meaning it
+//
+//	    If balancer is Connecting and has non-nil initTimer (meaning it
 //	    transitioned from Ready or Idle to connecting, not from TF, so we
 //	    should give it init-time to connect).
-//     - If balancer is READY or IDLE
-//     - If this is the lowest priority
-//   - do the following:
-//     - if this is not the old childInUse, override picker so old picker is no
+//
+//	    If balancer is READY or IDLE
+//
+//	    If this is the lowest priority
+//
+//	 do the following:
+//
+//	    if this is not the old childInUse, override picker so old picker is no
 //	    longer used.
-//     - switch to it (because all higher priorities are neither new or Ready)
-//     - forward the new addresses and config
+//
+//	    switch to it (because all higher priorities are neither new or Ready)
+//
+//	    forward the new addresses and config
 //
 // Caller must hold b.mu.
 func (b *priorityBalancer) syncPriority(childUpdating string) {

xds/internal/balancer/ringhash/ringhash.go

@@ -328,6 +328,7 @@ func (b *ringhashBalancer) ResolverError(err error) {
 //	- the new state is TransientFailure, to update the error message
 //	  - it's possible that this is a noop, but sending an extra update is easier
 //	    than comparing errors
+//
 //	- the aggregated state is changed
 //	  - the same picker will be sent again, but this update may trigger a re-pick
 //	    for some RPCs.

xds/internal/test/e2e/e2e_test.go

@@ -123,6 +123,7 @@ func TestPingPong(t *testing.T) {
 // - verify that
 //   - all RPCs with the same metadata value are sent to the same backend
 //   - only one backend is Ready
+//
 // - send more RPCs with different metadata values until a new backend is picked, and verify that
 //   - only two backends are in Ready
 func TestAffinity(t *testing.T) {

xds/internal/xdsclient/client_new.go

@@ -72,7 +72,7 @@ func newWithConfig(config *bootstrap.Config, watchExpiryTimeout time.Duration, i
 // NewWithConfigForTesting returns an xDS client for the specified bootstrap
 // config, separate from the global singleton.
 //
-// Testing Only
+// # Testing Only
 //
 // This function should ONLY be used for testing purposes.
 func NewWithConfigForTesting(config *bootstrap.Config, watchExpiryTimeout, authorityIdleTimeout time.Duration) (XDSClient, error) {
@@ -86,8 +86,7 @@ func NewWithConfigForTesting(config *bootstrap.Config, watchExpiryTimeout, autho
 // NewWithBootstrapContentsForTesting returns an xDS client for this config,
 // separate from the global singleton.
 //
-//
-// Testing Only
+// # Testing Only
 //
 // This function should ONLY be used for testing purposes.
 func NewWithBootstrapContentsForTesting(contents []byte) (XDSClient, error) {

xds/internal/xdsclient/watchers_cluster_test.go

@@ -105,6 +105,7 @@ func (s) TestClusterWatchExpiryTimerStop(t *testing.T) {
 // - an update is received after a watch()
 // - another update is received, with one resource removed
 //   - this should trigger callback with resource removed error
+//
 // - one more update without the removed resource
 //   - the callback (above) shouldn't receive any update
 func (s) TestClusterResourceRemoved(t *testing.T) {

xds/internal/xdsclient/watchers_test.go

@@ -428,6 +428,7 @@ func testWatchAfterCache(t *testing.T, typ xdsresource.ResourceType, update inte
 // - an update is received after a watch()
 // - another update is received, with one resource removed
 //   - this should trigger callback with resource removed error
+//
 // - one more update without the removed resource
 //   - the callback (above) shouldn't receive any update
 func testResourceRemoved(t *testing.T, typ xdsresource.ResourceType, update1 interface{}, resourceName1 string, update2 interface{}, resourceName2 string) {

xds/internal/xdsclient/xdsresource/matcher.go

@@ -209,16 +209,19 @@ func match(domain, host string) (domainMatchType, bool) {
 // matches host
 //
 //	The domains field support 4 different matching pattern types:
+//
 //	- Exact match
 //	- Suffix match (e.g. “*ABC”)
 //	- Prefix match (e.g. “ABC*)
 //	- Universal match (e.g. “*”)
 //
 //	The best match is defined as:
-//  - A match is better if it’s matching pattern type is better
-//    - Exact match > suffix match > prefix match > universal match
-//  - If two matches are of the same pattern type, the longer match is better
-//    - This is to compare the length of the matching pattern, e.g. “*ABCDE” >
+//	- A match is better if it’s matching pattern type is better.
+//	  * Exact match > suffix match > prefix match > universal match.
+//
+//	- If two matches are of the same pattern type, the longer match is
+//	  better.
+//	  * This is to compare the length of the matching pattern, e.g. “*ABCDE” >
 //	    “*ABC”
 func FindBestMatchingVirtualHost(host string, vHosts []*VirtualHost) *VirtualHost { // Maybe move this crap to client
 	var (

xds/server_options.go

@@ -62,12 +62,12 @@ type ServingModeChangeArgs struct {
 // to inject a bootstrap configuration used by only this server, instead of the
 // global configuration from the environment variables.
 //
-// Testing Only
+// # Testing Only
 //
 // This function should ONLY be used for testing and may not work with some
 // other features, including the CSDS service.
 //
-// Experimental
+// # Experimental
 //
 // Notice: This API is EXPERIMENTAL and may be changed or removed in a
 // later release.

xds/xds.go

@@ -81,12 +81,12 @@ func init() {
 // the supported environment variables.  The resolver.Builder is meant to be
 // used in conjunction with the grpc.WithResolvers DialOption.
 //
-// Testing Only
+// # Testing Only
 //
 // This function should ONLY be used for testing and may not work with some
 // other features, including the CSDS service.
 //
-// Experimental
+// # Experimental
 //
 // Notice: This API is EXPERIMENTAL and may be changed or removed in a
 // later release.