‘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.protopackage golangimport (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.MessageStatesizeCache     protoimpl.SizeCacheunknownFields protoimpl.UnknownFieldsProdId 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.MessageStatesizeCache     protoimpl.SizeCacheunknownFields protoimpl.UnknownFieldsProdStock 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.FileDescriptorvar 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.Oncefile_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.ProdRequest1, // 1: services.ProductService.GetProductStock:output_type -> services.ProdResponse1, // [1:2] is the sub-list for method output_type0, // [0:1] is the sub-list for method input_type0, // [0:0] is the sub-list for extension type_name0, // [0:0] is the sub-list for extension extendee0, // [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.statecase 1:return &v.sizeCachecase 2:return &v.unknownFieldsdefault:return nil}}file_hello_grpc_proto_msgTypes[1].Exporter = func(v interface{}, i int) interface{} {switch v := v.(*ProdResponse); i {case 0:return &v.statecase 1:return &v.sizeCachecase 2:return &v.unknownFieldsdefault: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.Filefile_hello_grpc_proto_rawDesc = nilfile_hello_grpc_proto_goTypes = nilfile_hello_grpc_proto_depIdxs = nil
}

接下来就可以开始调用了