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|
// Copyright (c) 2017 Cisco and/or its affiliates.
//
// 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.
package main
import (
"bytes"
"fmt"
"io"
"path/filepath"
"sort"
"strings"
"unicode"
)
// generatedCodeVersion indicates a version of the generated code.
// It is incremented whenever an incompatibility between the generated code and
// GoVPP api package is introduced; the generated code references
// a constant, api.GoVppAPIPackageIsVersionN (where N is generatedCodeVersion).
const generatedCodeVersion = 1
const (
inputFileExt = ".api.json" // file extension of the VPP API files
outputFileExt = ".ba.go" // file extension of the Go generated files
govppApiImportPath = "git.fd.io/govpp.git/api" // import path of the govpp API package
constModuleName = "ModuleName" // module name constant
constAPIVersion = "APIVersion" // API version constant
constVersionCrc = "VersionCrc" // version CRC constant
unionDataField = "XXX_UnionData" // name for the union data field
serviceApiName = "RPCService" // name for the RPC service interface
serviceImplName = "serviceClient" // name for the RPC service implementation
serviceClientName = "ServiceClient" // name for the RPC service client
)
// context is a structure storing data for code generation
type context struct {
inputFile string // input file with VPP API in JSON
outputFile string // output file with generated Go package
inputData []byte // contents of the input file
includeAPIVersion bool // include constant with API version string
includeComments bool // include parts of original source in comments
includeBinapiNames bool // include binary API names as struct tag
includeServices bool // include service interface with client implementation
moduleName string // name of the source VPP module
packageName string // name of the Go package being generated
packageData *Package // parsed package data
}
// newContext returns context details of the code generation task
func newContext(inputFile, outputDir string) (*context, error) {
if !strings.HasSuffix(inputFile, inputFileExt) {
return nil, fmt.Errorf("invalid input file name: %q", inputFile)
}
ctx := &context{
inputFile: inputFile,
}
// package name
inputFileName := filepath.Base(inputFile)
ctx.moduleName = inputFileName[:strings.Index(inputFileName, ".")]
// alter package names for modules that are reserved keywords in Go
switch ctx.moduleName {
case "interface":
ctx.packageName = "interfaces"
case "map":
ctx.packageName = "maps"
default:
ctx.packageName = ctx.moduleName
}
// output file
packageDir := filepath.Join(outputDir, ctx.packageName)
outputFileName := ctx.packageName + outputFileExt
ctx.outputFile = filepath.Join(packageDir, outputFileName)
return ctx, nil
}
func generatePackage(ctx *context, w io.Writer) error {
logf("generating package %q", ctx.packageName)
fmt.Fprintln(w, "// Code generated by GoVPP's binapi-generator. DO NOT EDIT.")
fmt.Fprintf(w, "// source: %s\n", ctx.inputFile)
fmt.Fprintln(w)
generateHeader(ctx, w)
// generate module desc
fmt.Fprintln(w, "const (")
fmt.Fprintf(w, "\t// %s is the name of this module.\n", constModuleName)
fmt.Fprintf(w, "\t%s = \"%s\"\n", constModuleName, ctx.moduleName)
if ctx.includeAPIVersion {
if ctx.packageData.Version != "" {
fmt.Fprintf(w, "\t// %s is the API version of this module.\n", constAPIVersion)
fmt.Fprintf(w, "\t%s = \"%s\"\n", constAPIVersion, ctx.packageData.Version)
}
fmt.Fprintf(w, "\t// %s is the CRC of this module.\n", constVersionCrc)
fmt.Fprintf(w, "\t%s = %v\n", constVersionCrc, ctx.packageData.CRC)
}
fmt.Fprintln(w, ")")
fmt.Fprintln(w)
// generate enums
if len(ctx.packageData.Enums) > 0 {
for _, enum := range ctx.packageData.Enums {
generateEnum(ctx, w, &enum)
}
}
// generate aliases
if len(ctx.packageData.Aliases) > 0 {
for _, alias := range ctx.packageData.Aliases {
generateAlias(ctx, w, &alias)
}
}
// generate types
if len(ctx.packageData.Types) > 0 {
for _, typ := range ctx.packageData.Types {
generateType(ctx, w, &typ)
}
}
// generate unions
if len(ctx.packageData.Unions) > 0 {
for _, union := range ctx.packageData.Unions {
generateUnion(ctx, w, &union)
}
}
// generate messages
if len(ctx.packageData.Messages) > 0 {
for _, msg := range ctx.packageData.Messages {
generateMessage(ctx, w, &msg)
}
// generate message registrations
fmt.Fprintln(w, "func init() {")
for _, msg := range ctx.packageData.Messages {
name := camelCaseName(msg.Name)
fmt.Fprintf(w, "\tapi.RegisterMessage((*%s)(nil), \"%s\")\n", name, ctx.moduleName+"."+name)
}
fmt.Fprintln(w, "}")
fmt.Fprintln(w)
// generate list of messages
fmt.Fprintf(w, "// Messages returns list of all messages in this module.\n")
fmt.Fprintln(w, "func AllMessages() []api.Message {")
fmt.Fprintln(w, "\treturn []api.Message{")
for _, msg := range ctx.packageData.Messages {
name := camelCaseName(msg.Name)
fmt.Fprintf(w, "\t(*%s)(nil),\n", name)
}
fmt.Fprintln(w, "}")
fmt.Fprintln(w, "}")
}
if ctx.includeServices {
// generate services
if len(ctx.packageData.Services) > 0 {
generateServices(ctx, w, ctx.packageData.Services)
}
}
generateFooter(ctx, w)
return nil
}
func generateHeader(ctx *context, w io.Writer) {
fmt.Fprintln(w, "/*")
fmt.Fprintf(w, "Package %s is a generated VPP binary API for '%s' module.\n", ctx.packageName, ctx.moduleName)
fmt.Fprintln(w)
fmt.Fprintln(w, "It consists of:")
printObjNum := func(obj string, num int) {
if num > 0 {
if num > 1 {
if strings.HasSuffix(obj, "s") {
obj += "es"
} else {
obj += "s"
}
}
fmt.Fprintf(w, "\t%3d %s\n", num, obj)
}
}
printObjNum("enum", len(ctx.packageData.Enums))
printObjNum("alias", len(ctx.packageData.Aliases))
printObjNum("type", len(ctx.packageData.Types))
printObjNum("union", len(ctx.packageData.Unions))
printObjNum("message", len(ctx.packageData.Messages))
printObjNum("service", len(ctx.packageData.Services))
fmt.Fprintln(w, "*/")
fmt.Fprintf(w, "package %s\n", ctx.packageName)
fmt.Fprintln(w)
fmt.Fprintln(w, "import (")
fmt.Fprintf(w, "\tapi \"%s\"\n", govppApiImportPath)
fmt.Fprintf(w, "\tbytes \"%s\"\n", "bytes")
fmt.Fprintf(w, "\tcontext \"%s\"\n", "context")
fmt.Fprintf(w, "\tio \"%s\"\n", "io")
fmt.Fprintf(w, "\tstrconv \"%s\"\n", "strconv")
fmt.Fprintf(w, "\tstruc \"%s\"\n", "github.com/lunixbochs/struc")
fmt.Fprintln(w, ")")
fmt.Fprintln(w)
}
func generateFooter(ctx *context, w io.Writer) {
fmt.Fprintln(w, "// This is a compile-time assertion to ensure that this generated file")
fmt.Fprintln(w, "// is compatible with the GoVPP api package it is being compiled against.")
fmt.Fprintln(w, "// A compilation error at this line likely means your copy of the")
fmt.Fprintln(w, "// GoVPP api package needs to be updated.")
fmt.Fprintf(w, "const _ = api.GoVppAPIPackageIsVersion%d // please upgrade the GoVPP api package\n", generatedCodeVersion)
fmt.Fprintln(w)
fmt.Fprintf(w, "// Reference imports to suppress errors if they are not otherwise used.\n")
fmt.Fprintf(w, "var _ = api.RegisterMessage\n")
fmt.Fprintf(w, "var _ = bytes.NewBuffer\n")
fmt.Fprintf(w, "var _ = context.Background\n")
fmt.Fprintf(w, "var _ = io.Copy\n")
fmt.Fprintf(w, "var _ = strconv.Itoa\n")
fmt.Fprintf(w, "var _ = struc.Pack\n")
}
func generateComment(ctx *context, w io.Writer, goName string, vppName string, objKind string) {
if objKind == "service" {
fmt.Fprintf(w, "// %s represents RPC service API for %s module.\n", goName, ctx.moduleName)
} else {
fmt.Fprintf(w, "// %s represents VPP binary API %s '%s'.\n", goName, objKind, vppName)
}
if !ctx.includeComments {
return
}
var isNotSpace = func(r rune) bool {
return !unicode.IsSpace(r)
}
// print out the source of the generated object
mapType := false
objFound := false
objTitle := fmt.Sprintf(`"%s",`, vppName)
switch objKind {
case "alias", "service":
objTitle = fmt.Sprintf(`"%s": {`, vppName)
mapType = true
}
inputBuff := bytes.NewBuffer(ctx.inputData)
inputLine := 0
var trimIndent string
var indent int
for {
line, err := inputBuff.ReadString('\n')
if err != nil {
break
}
inputLine++
noSpaceAt := strings.IndexFunc(line, isNotSpace)
if !objFound {
indent = strings.Index(line, objTitle)
if indent == -1 {
continue
}
trimIndent = line[:indent]
// If no other non-whitespace character then we are at the message header.
if trimmed := strings.TrimSpace(line); trimmed == objTitle {
objFound = true
fmt.Fprintln(w, "//")
}
} else if noSpaceAt < indent {
break // end of the definition in JSON for array types
} else if objFound && mapType && noSpaceAt <= indent {
fmt.Fprintf(w, "//\t%s", strings.TrimPrefix(line, trimIndent))
break // end of the definition in JSON for map types (aliases, services)
}
fmt.Fprintf(w, "//\t%s", strings.TrimPrefix(line, trimIndent))
}
fmt.Fprintln(w, "//")
}
func generateEnum(ctx *context, w io.Writer, enum *Enum) {
name := camelCaseName(enum.Name)
typ := binapiTypes[enum.Type]
logf(" writing enum %q (%s) with %d entries", enum.Name, name, len(enum.Entries))
// generate enum comment
generateComment(ctx, w, name, enum.Name, "enum")
// generate enum definition
fmt.Fprintf(w, "type %s %s\n", name, typ)
fmt.Fprintln(w)
// generate enum entries
fmt.Fprintln(w, "const (")
for _, entry := range enum.Entries {
fmt.Fprintf(w, "\t%s %s = %v\n", entry.Name, name, entry.Value)
}
fmt.Fprintln(w, ")")
fmt.Fprintln(w)
// generate enum conversion maps
fmt.Fprintf(w, "var %s_name = map[%s]string{\n", name, typ)
for _, entry := range enum.Entries {
fmt.Fprintf(w, "\t%v: \"%s\",\n", entry.Value, entry.Name)
}
fmt.Fprintln(w, "}")
fmt.Fprintln(w)
fmt.Fprintf(w, "var %s_value = map[string]%s{\n", name, typ)
for _, entry := range enum.Entries {
fmt.Fprintf(w, "\t\"%s\": %v,\n", entry.Name, entry.Value)
}
fmt.Fprintln(w, "}")
fmt.Fprintln(w)
fmt.Fprintf(w, "func (x %s) String() string {\n", name)
fmt.Fprintf(w, "\ts, ok := %s_name[%s(x)]\n", name, typ)
fmt.Fprintf(w, "\tif ok { return s }\n")
fmt.Fprintf(w, "\treturn strconv.Itoa(int(x))\n")
fmt.Fprintln(w, "}")
fmt.Fprintln(w)
}
func generateAlias(ctx *context, w io.Writer, alias *Alias) {
name := camelCaseName(alias.Name)
logf(" writing type %q (%s), length: %d", alias.Name, name, alias.Length)
// generate struct comment
generateComment(ctx, w, name, alias.Name, "alias")
// generate struct definition
fmt.Fprintf(w, "type %s ", name)
if alias.Length > 0 {
fmt.Fprintf(w, "[%d]", alias.Length)
}
dataType := convertToGoType(ctx, alias.Type)
fmt.Fprintf(w, "%s\n", dataType)
fmt.Fprintln(w)
}
func generateUnion(ctx *context, w io.Writer, union *Union) {
name := camelCaseName(union.Name)
logf(" writing union %q (%s) with %d fields", union.Name, name, len(union.Fields))
// generate struct comment
generateComment(ctx, w, name, union.Name, "union")
// generate struct definition
fmt.Fprintln(w, "type", name, "struct {")
// maximum size for union
maxSize := getUnionSize(ctx, union)
// generate data field
fmt.Fprintf(w, "\t%s [%d]byte\n", unionDataField, maxSize)
// generate end of the struct
fmt.Fprintln(w, "}")
// generate name getter
generateTypeNameGetter(w, name, union.Name)
// generate CRC getter
if union.CRC != "" {
generateCrcGetter(w, name, union.CRC)
}
// generate getters for fields
for _, field := range union.Fields {
fieldName := camelCaseName(field.Name)
fieldType := convertToGoType(ctx, field.Type)
generateUnionGetterSetter(w, name, fieldName, fieldType)
}
// generate union methods
//generateUnionMethods(w, name)
fmt.Fprintln(w)
}
// generateUnionMethods generates methods that implement struc.Custom
// interface to allow having XXX_uniondata field unexported
// TODO: do more testing when unions are actually used in some messages
/*func generateUnionMethods(w io.Writer, structName string) {
// generate struc.Custom implementation for union
fmt.Fprintf(w, `
func (u *%[1]s) Pack(p []byte, opt *struc.Options) (int, error) {
var b = new(bytes.Buffer)
if err := struc.PackWithOptions(b, u.union_data, opt); err != nil {
return 0, err
}
copy(p, b.Bytes())
return b.Len(), nil
}
func (u *%[1]s) Unpack(r io.Reader, length int, opt *struc.Options) error {
return struc.UnpackWithOptions(r, u.union_data[:], opt)
}
func (u *%[1]s) Size(opt *struc.Options) int {
return len(u.union_data)
}
func (u *%[1]s) String() string {
return string(u.union_data[:])
}
`, structName)
}*/
func generateUnionGetterSetter(w io.Writer, structName string, getterField, getterStruct string) {
fmt.Fprintf(w, `
func %[1]s%[2]s(a %[3]s) (u %[1]s) {
u.Set%[2]s(a)
return
}
func (u *%[1]s) Set%[2]s(a %[3]s) {
var b = new(bytes.Buffer)
if err := struc.Pack(b, &a); err != nil {
return
}
copy(u.%[4]s[:], b.Bytes())
}
func (u *%[1]s) Get%[2]s() (a %[3]s) {
var b = bytes.NewReader(u.%[4]s[:])
struc.Unpack(b, &a)
return
}
`, structName, getterField, getterStruct, unionDataField)
}
func generateType(ctx *context, w io.Writer, typ *Type) {
name := camelCaseName(typ.Name)
logf(" writing type %q (%s) with %d fields", typ.Name, name, len(typ.Fields))
// generate struct comment
generateComment(ctx, w, name, typ.Name, "type")
// generate struct definition
fmt.Fprintf(w, "type %s struct {\n", name)
// generate struct fields
for i, field := range typ.Fields {
// skip internal fields
switch strings.ToLower(field.Name) {
case crcField, msgIdField:
continue
}
generateField(ctx, w, typ.Fields, i)
}
// generate end of the struct
fmt.Fprintln(w, "}")
// generate name getter
generateTypeNameGetter(w, name, typ.Name)
// generate CRC getter
if typ.CRC != "" {
generateCrcGetter(w, name, typ.CRC)
}
fmt.Fprintln(w)
}
func generateMessage(ctx *context, w io.Writer, msg *Message) {
name := camelCaseName(msg.Name)
logf(" writing message %q (%s) with %d fields", msg.Name, name, len(msg.Fields))
// generate struct comment
generateComment(ctx, w, name, msg.Name, "message")
// generate struct definition
fmt.Fprintf(w, "type %s struct {", name)
msgType := otherMessage
wasClientIndex := false
// generate struct fields
n := 0
for i, field := range msg.Fields {
if i == 1 {
if field.Name == clientIndexField {
// "client_index" as the second member,
// this might be an event message or a request
msgType = eventMessage
wasClientIndex = true
} else if field.Name == contextField {
// reply needs "context" as the second member
msgType = replyMessage
}
} else if i == 2 {
if wasClientIndex && field.Name == contextField {
// request needs "client_index" as the second member
// and "context" as the third member
msgType = requestMessage
}
}
// skip internal fields
switch strings.ToLower(field.Name) {
case crcField, msgIdField:
continue
case clientIndexField, contextField:
if n == 0 {
continue
}
}
n++
if n == 1 {
fmt.Fprintln(w)
}
generateField(ctx, w, msg.Fields, i)
}
// generate end of the struct
fmt.Fprintln(w, "}")
// generate name getter
generateMessageNameGetter(w, name, msg.Name)
// generate CRC getter
generateCrcGetter(w, name, msg.CRC)
// generate message type getter method
generateMessageTypeGetter(w, name, msgType)
fmt.Fprintln(w)
}
func generateField(ctx *context, w io.Writer, fields []Field, i int) {
field := fields[i]
fieldName := strings.TrimPrefix(field.Name, "_")
fieldName = camelCaseName(fieldName)
// generate length field for strings
if field.Type == "string" {
fmt.Fprintf(w, "\tXXX_%sLen uint32 `struc:\"sizeof=%s\"`\n", fieldName, fieldName)
}
dataType := convertToGoType(ctx, field.Type)
fieldType := dataType
// check if it is array
if field.Length > 0 || field.SizeFrom != "" {
if dataType == "uint8" {
dataType = "byte"
}
fieldType = "[]" + dataType
}
fmt.Fprintf(w, "\t%s %s", fieldName, fieldType)
fieldTags := map[string]string{}
if field.Length > 0 {
// fixed size array
fieldTags["struc"] = fmt.Sprintf("[%d]%s", field.Length, dataType)
} else {
for _, f := range fields {
if f.SizeFrom == field.Name {
// variable sized array
sizeOfName := camelCaseName(f.Name)
fieldTags["struc"] = fmt.Sprintf("sizeof=%s", sizeOfName)
}
}
}
if ctx.includeBinapiNames {
fieldTags["binapi"] = field.Name
}
if field.Meta.Limit > 0 {
fieldTags["binapi"] = fmt.Sprintf("%s,limit=%d", fieldTags["binapi"], field.Meta.Limit)
}
if len(fieldTags) > 0 {
fmt.Fprintf(w, "\t`")
var keys []string
for k := range fieldTags {
keys = append(keys, k)
}
sort.Strings(keys)
var n int
for _, tt := range keys {
t, ok := fieldTags[tt]
if !ok {
continue
}
if n > 0 {
fmt.Fprintf(w, " ")
}
n++
fmt.Fprintf(w, `%s:"%s"`, tt, t)
}
fmt.Fprintf(w, "`")
}
fmt.Fprintln(w)
}
func generateMessageNameGetter(w io.Writer, structName, msgName string) {
fmt.Fprintf(w, `func (*%s) GetMessageName() string {
return %q
}
`, structName, msgName)
}
func generateTypeNameGetter(w io.Writer, structName, msgName string) {
fmt.Fprintf(w, `func (*%s) GetTypeName() string {
return %q
}
`, structName, msgName)
}
func generateCrcGetter(w io.Writer, structName, crc string) {
crc = strings.TrimPrefix(crc, "0x")
fmt.Fprintf(w, `func (*%s) GetCrcString() string {
return %q
}
`, structName, crc)
}
func generateMessageTypeGetter(w io.Writer, structName string, msgType MessageType) {
fmt.Fprintln(w, "func (*"+structName+") GetMessageType() api.MessageType {")
if msgType == requestMessage {
fmt.Fprintln(w, "\treturn api.RequestMessage")
} else if msgType == replyMessage {
fmt.Fprintln(w, "\treturn api.ReplyMessage")
} else if msgType == eventMessage {
fmt.Fprintln(w, "\treturn api.EventMessage")
} else {
fmt.Fprintln(w, "\treturn api.OtherMessage")
}
fmt.Fprintln(w, "}")
}
func generateServices(ctx *context, w io.Writer, services []Service) {
// generate services comment
generateComment(ctx, w, serviceApiName, "services", "service")
// generate service api
fmt.Fprintf(w, "type %s interface {\n", serviceApiName)
for _, svc := range services {
generateServiceMethod(ctx, w, &svc)
fmt.Fprintln(w)
}
fmt.Fprintln(w, "}")
fmt.Fprintln(w)
// generate client implementation
fmt.Fprintf(w, "type %s struct {\n", serviceImplName)
fmt.Fprintf(w, "\tch api.Channel\n")
fmt.Fprintln(w, "}")
fmt.Fprintln(w)
// generate client constructor
fmt.Fprintf(w, "func New%s(ch api.Channel) %s {\n", serviceClientName, serviceApiName)
fmt.Fprintf(w, "\treturn &%s{ch}\n", serviceImplName)
fmt.Fprintln(w, "}")
fmt.Fprintln(w)
for _, svc := range services {
method := camelCaseName(svc.RequestType)
if m := strings.TrimSuffix(method, "Dump"); method != m {
method = "Dump" + m
}
fmt.Fprintf(w, "func (c *%s) ", serviceImplName)
generateServiceMethod(ctx, w, &svc)
fmt.Fprintln(w, " {")
if svc.Stream {
streamImpl := fmt.Sprintf("%s_%sClient", serviceImplName, method)
fmt.Fprintf(w, "\tstream := c.ch.SendMultiRequest(in)\n")
fmt.Fprintf(w, "\tx := &%s{stream}\n", streamImpl)
fmt.Fprintf(w, "\treturn x, nil\n")
} else if replyTyp := camelCaseName(svc.ReplyType); replyTyp != "" {
fmt.Fprintf(w, "\tout := new(%s)\n", replyTyp)
fmt.Fprintf(w, "\terr:= c.ch.SendRequest(in).ReceiveReply(out)\n")
fmt.Fprintf(w, "\tif err != nil { return nil, err }\n")
fmt.Fprintf(w, "\treturn out, nil\n")
} else {
fmt.Fprintf(w, "\tc.ch.SendRequest(in)\n")
fmt.Fprintf(w, "\treturn nil\n")
}
fmt.Fprintln(w, "}")
fmt.Fprintln(w)
if svc.Stream {
replyTyp := camelCaseName(svc.ReplyType)
method := camelCaseName(svc.RequestType)
if m := strings.TrimSuffix(method, "Dump"); method != m {
method = "Dump" + m
}
streamApi := fmt.Sprintf("%s_%sClient", serviceApiName, method)
fmt.Fprintf(w, "type %s interface {\n", streamApi)
fmt.Fprintf(w, "\tRecv() (*%s, error)\n", replyTyp)
fmt.Fprintln(w, "}")
fmt.Fprintln(w)
streamImpl := fmt.Sprintf("%s_%sClient", serviceImplName, method)
fmt.Fprintf(w, "type %s struct {\n", streamImpl)
fmt.Fprintf(w, "\tapi.MultiRequestCtx\n")
fmt.Fprintln(w, "}")
fmt.Fprintln(w)
fmt.Fprintf(w, "func (c *%s) Recv() (*%s, error) {\n", streamImpl, replyTyp)
fmt.Fprintf(w, "\tm := new(%s)\n", replyTyp)
fmt.Fprintf(w, "\tstop, err := c.MultiRequestCtx.ReceiveReply(m)\n")
fmt.Fprintf(w, "\tif err != nil { return nil, err }\n")
fmt.Fprintf(w, "\tif stop { return nil, io.EOF }\n")
fmt.Fprintf(w, "\treturn m, nil\n")
fmt.Fprintln(w, "}")
fmt.Fprintln(w)
}
}
fmt.Fprintln(w)
}
func generateServiceMethod(ctx *context, w io.Writer, svc *Service) {
reqTyp := camelCaseName(svc.RequestType)
// method name is same as parameter type name by default
method := reqTyp
if svc.Stream {
// use Dump as prefix instead of suffix for stream services
if m := strings.TrimSuffix(method, "Dump"); method != m {
method = "Dump" + m
}
}
params := fmt.Sprintf("in *%s", reqTyp)
returns := "error"
if replyType := camelCaseName(svc.ReplyType); replyType != "" {
var replyTyp string
if svc.Stream {
replyTyp = fmt.Sprintf("%s_%sClient", serviceApiName, method)
} else {
replyTyp = fmt.Sprintf("*%s", replyType)
}
returns = fmt.Sprintf("(%s, error)", replyTyp)
}
fmt.Fprintf(w, "\t%s(ctx context.Context, %s) %s", method, params, returns)
}
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