‘protoc-gen-go‘ 不是内部或外部命令，也不是可运行的程序解决方法

今天做一个go环境下的gRPC测试，结果卡go rpc文件生成这里，我在proto文件所在目录，建了一个build.bat执行程序，代码如下

protoc --go_out=. --go_opt=paths=source_relative --go-grpc_out=. --go-grpc_opt=paths=source_relative ./hello_grpc.proto

执行报错 'protoc-gen-go' 不是内部或外部命令，也不是可运行的程序，然后就去查资料，大部分资料都没解决问题，无非是设置环境变量，编译源码等，最后解决方法如下

第一步

检查gopath目录（%GOPATH%\）的bin文件夹，是否有protoc-gen-go.exe，protoc-gen-go-grpc.exe，2个exe文件，一般执行了安装命令 go install github.com/golang/protobuf/protoc-gen-go，就会有这2个文件

第二步

将刚才找到的2个exe文件，复制到goroot（%GOROOT%\）的bin目录下

 第三部

重新执行build.exe

 我们查看下proto文件所在目录，已经产生文件了

hello_grpc.pb.go文件代码如下

// Code generated by protoc-gen-go. DO NOT EDIT.
// versions:
// 	protoc-gen-go v1.28.0
// 	protoc        v3.19.4
// source: hello_grpc.proto

package golang

import (
	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)
)

type ProdRequest struct {
	state         protoimpl.MessageState
	sizeCache     protoimpl.SizeCache
	unknownFields protoimpl.UnknownFields

	ProdId int32 `protobuf:"varint,1,opt,name=prod_id,json=prodId,proto3" json:"prod_id,omitempty"` //商品ID
}

func (x *ProdRequest) Reset() {
	*x = ProdRequest{}
	if protoimpl.UnsafeEnabled {
		mi := &file_hello_grpc_proto_msgTypes[0]
		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
		ms.StoreMessageInfo(mi)
	}
}

func (x *ProdRequest) String() string {
	return protoimpl.X.MessageStringOf(x)
}

func (*ProdRequest) ProtoMessage() {}

func (x *ProdRequest) ProtoReflect() protoreflect.Message {
	mi := &file_hello_grpc_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 ProdRequest.ProtoReflect.Descriptor instead.
func (*ProdRequest) Descriptor() ([]byte, []int) {
	return file_hello_grpc_proto_rawDescGZIP(), []int{0}
}

func (x *ProdRequest) GetProdId() int32 {
	if x != nil {
		return x.ProdId
	}
	return 0
}

type ProdResponse struct {
	state         protoimpl.MessageState
	sizeCache     protoimpl.SizeCache
	unknownFields protoimpl.UnknownFields

	ProdStock int32 `protobuf:"varint,1,opt,name=prod_stock,json=prodStock,proto3" json:"prod_stock,omitempty"` //商品库存
}

func (x *ProdResponse) Reset() {
	*x = ProdResponse{}
	if protoimpl.UnsafeEnabled {
		mi := &file_hello_grpc_proto_msgTypes[1]
		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
		ms.StoreMessageInfo(mi)
	}
}

func (x *ProdResponse) String() string {
	return protoimpl.X.MessageStringOf(x)
}

func (*ProdResponse) ProtoMessage() {}

func (x *ProdResponse) ProtoReflect() protoreflect.Message {
	mi := &file_hello_grpc_proto_msgTypes[1]
	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 ProdResponse.ProtoReflect.Descriptor instead.
func (*ProdResponse) Descriptor() ([]byte, []int) {
	return file_hello_grpc_proto_rawDescGZIP(), []int{1}
}

func (x *ProdResponse) GetProdStock() int32 {
	if x != nil {
		return x.ProdStock
	}
	return 0
}

var File_hello_grpc_proto protoreflect.FileDescriptor

var file_hello_grpc_proto_rawDesc = []byte{
	0x0a, 0x10, 0x68, 0x65, 0x6c, 0x6c, 0x6f, 0x5f, 0x67, 0x72, 0x70, 0x63, 0x2e, 0x70, 0x72, 0x6f,
	0x74, 0x6f, 0x12, 0x08, 0x73, 0x65, 0x72, 0x76, 0x69, 0x63, 0x65, 0x73, 0x22, 0x26, 0x0a, 0x0b,
	0x50, 0x72, 0x6f, 0x64, 0x52, 0x65, 0x71, 0x75, 0x65, 0x73, 0x74, 0x12, 0x17, 0x0a, 0x07, 0x70,
	0x72, 0x6f, 0x64, 0x5f, 0x69, 0x64, 0x18, 0x01, 0x20, 0x01, 0x28, 0x05, 0x52, 0x06, 0x70, 0x72,
	0x6f, 0x64, 0x49, 0x64, 0x22, 0x2d, 0x0a, 0x0c, 0x50, 0x72, 0x6f, 0x64, 0x52, 0x65, 0x73, 0x70,
	0x6f, 0x6e, 0x73, 0x65, 0x12, 0x1d, 0x0a, 0x0a, 0x70, 0x72, 0x6f, 0x64, 0x5f, 0x73, 0x74, 0x6f,
	0x63, 0x6b, 0x18, 0x01, 0x20, 0x01, 0x28, 0x05, 0x52, 0x09, 0x70, 0x72, 0x6f, 0x64, 0x53, 0x74,
	0x6f, 0x63, 0x6b, 0x32, 0x52, 0x0a, 0x0e, 0x50, 0x72, 0x6f, 0x64, 0x75, 0x63, 0x74, 0x53, 0x65,
	0x72, 0x76, 0x69, 0x63, 0x65, 0x12, 0x40, 0x0a, 0x0f, 0x47, 0x65, 0x74, 0x50, 0x72, 0x6f, 0x64,
	0x75, 0x63, 0x74, 0x53, 0x74, 0x6f, 0x63, 0x6b, 0x12, 0x15, 0x2e, 0x73, 0x65, 0x72, 0x76, 0x69,
	0x63, 0x65, 0x73, 0x2e, 0x50, 0x72, 0x6f, 0x64, 0x52, 0x65, 0x71, 0x75, 0x65, 0x73, 0x74, 0x1a,
	0x16, 0x2e, 0x73, 0x65, 0x72, 0x76, 0x69, 0x63, 0x65, 0x73, 0x2e, 0x50, 0x72, 0x6f, 0x64, 0x52,
	0x65, 0x73, 0x70, 0x6f, 0x6e, 0x73, 0x65, 0x42, 0x0b, 0x5a, 0x09, 0x2e, 0x2f, 0x3b, 0x67, 0x6f,
	0x6c, 0x61, 0x6e, 0x67, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
}

var (
	file_hello_grpc_proto_rawDescOnce sync.Once
	file_hello_grpc_proto_rawDescData = file_hello_grpc_proto_rawDesc
)

func file_hello_grpc_proto_rawDescGZIP() []byte {
	file_hello_grpc_proto_rawDescOnce.Do(func() {
		file_hello_grpc_proto_rawDescData = protoimpl.X.CompressGZIP(file_hello_grpc_proto_rawDescData)
	})
	return file_hello_grpc_proto_rawDescData
}

var file_hello_grpc_proto_msgTypes = make([]protoimpl.MessageInfo, 2)
var file_hello_grpc_proto_goTypes = []interface{}{
	(*ProdRequest)(nil),  // 0: services.ProdRequest
	(*ProdResponse)(nil), // 1: services.ProdResponse
}
var file_hello_grpc_proto_depIdxs = []int32{
	0, // 0: services.ProductService.GetProductStock:input_type -> services.ProdRequest
	1, // 1: services.ProductService.GetProductStock:output_type -> services.ProdResponse
	1, // [1:2] is the sub-list for method output_type
	0, // [0:1] is the sub-list for method input_type
	0, // [0:0] is the sub-list for extension type_name
	0, // [0:0] is the sub-list for extension extendee
	0, // [0:0] is the sub-list for field type_name
}

func init() { file_hello_grpc_proto_init() }
func file_hello_grpc_proto_init() {
	if File_hello_grpc_proto != nil {
		return
	}
	if !protoimpl.UnsafeEnabled {
		file_hello_grpc_proto_msgTypes[0].Exporter = func(v interface{}, i int) interface{} {
			switch v := v.(*ProdRequest); i {
			case 0:
				return &v.state
			case 1:
				return &v.sizeCache
			case 2:
				return &v.unknownFields
			default:
				return nil
			}
		}
		file_hello_grpc_proto_msgTypes[1].Exporter = func(v interface{}, i int) interface{} {
			switch v := v.(*ProdResponse); 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_hello_grpc_proto_rawDesc,
			NumEnums:      0,
			NumMessages:   2,
			NumExtensions: 0,
			NumServices:   1,
		},
		GoTypes:           file_hello_grpc_proto_goTypes,
		DependencyIndexes: file_hello_grpc_proto_depIdxs,
		MessageInfos:      file_hello_grpc_proto_msgTypes,
	}.Build()
	File_hello_grpc_proto = out.File
	file_hello_grpc_proto_rawDesc = nil
	file_hello_grpc_proto_goTypes = nil
	file_hello_grpc_proto_depIdxs = nil
}

接下来就可以开始调用了