go语言protoc编译问题-protoc-gen-go: unable to determine Go import path for “searchnode.proto“ 笔记

go语言protoc编译问题-protoc-gen-go: unable to determine Go import path for “searchnode.proto” 最近换了个电脑，重新配置go语言的开发环境，可是使用protoc编译proto协议文件的时候出现了问题，找了挺久不知道什么原因。最后找到了一个解决办法，具体原因暂时还是不明白，如果有朋友知道的话，也请不吝赐教，感谢。
可在protoc中指定以下参数避免报错。

option go_package = “./SearchNode”;

test.proto

syntax = "proto3"; package VectorSearch.SearchNode; // 指定proto的包名 //option go_package = "./SearchNode"; // 编译为.go文件最好指定的参数message Item { string id = 1; floatscore = 2; repeated Field fields = 3; }message Field { string key = 1; // 字段名 string value = https://www.it610.com/article/2; // 值 }message SearchNodeReq { string request_id = 1; // 请求id string index_name = 2; // 搜索对应索引名称 int32cluster_num = 3; // 查询簇数量, int32request_num = 4; // 请求数量 repeated float vector = 5; // 搜索向量值 }message SearchNodeResp { int32ret_code = 1; // 返回码 stringerr_msg = 2; // 错误信息 repeated Item results = 3; // 搜索结果列表 }service SearchNode { rpc Search(SearchNodeReq) returns (SearchNodeResp) {} }

刚开始在文件中没有加上option go_package = “./SearchNode”; -->报错，提示你能导入test.proto文件

运行以下命令都报错
只编译编码部分
protoc -I=. --go_out=. test.proto
编译编码部分和服务代码
protoc -I=. --go_out=plugins=grpc:. test.proto

// 报错信息 $ protoc -I . --go_out=plugins=grpc:.test.proto protoc-gen-go: unable to determine Go import path for "test.proto"Please specify either: ? a "go_package" option in the .proto source file, or ? a "M" argument on the command line.See https://developers.google.com/protocol-buffers/docs/reference/go-generated#package for more information.--go_out: protoc-gen-go: Plugin failed with status code 1.

【go语言protoc编译问题-protoc-gen-go: unable to determine Go import path for “searchnode.proto“】后来在文件头部加入

option go_package = "path/package_name"; path指定.go文件放置的路径，package_name表示包名 ps: option go_package = "./SearchNode"; //path = ./,package_name=SearchNode

运行以下命令，就可以编译成功了， protoc -I=PATH指定要在其中搜索导入的目录。可以多次指定；目录将按顺序搜索。如果未给出，则使用当前工作目录。指定要使用的插件可执行文件。protoc -I=. --go_out=plugins=grpc:. searchnode/searchnode.proto 命令解释 -I表示输入位置 --go_out后接的地址表示编译好的.go文件放置地址，plugins=grpc表示会将proto文件中指定的服务编译为接口代码

protoc 命令参数解释

Parse PROTO_FILES and generate output based on the options given: -IPATH, --proto_path=PATHSpecify the directory in which to search for imports.May be specified multiple times; directories will be searched in order.If not given, the current working directory is used. If not found in any of the these directories, the --descriptor_set_in descriptors will be checked for required proto file.--versionShow version info and exit. -h, --helpShow this text and exit.--encode=MESSAGE_TYPERead a text-format message of the given type from standard input and write it in binary to standard output.The message type must be defined in PROTO_FILES or their imports.--decode=MESSAGE_TYPERead a binary message of the given type from standard input and write it in text format to standard output.The message type must be defined in PROTO_FILES or their imports.--decode_rawRead an arbitrary protocol message from standard input and write the raw tag/value pairs in text format to standard output.No PROTO_FILES should be given when using this flag.--descriptor_set_in=FILESSpecifies a delimited list of FILES each containing a FileDescriptorSet (a protocol buffer defined in descriptor.proto). The FileDescriptor for each of the PROTO_FILES provided will be loaded from these FileDescriptorSets. If a FileDescriptor appears multiple times, the first occurrence will be used.-oFILE,Writes a FileDescriptorSet (a protocol buffer, --descriptor_set_out=FILE defined in descriptor.proto) containing all of the input files to FILE.--include_importsWhen using --descriptor_set_out, also include all dependencies of the input files in the set, so that the set is self-contained.--include_source_infoWhen using --descriptor_set_out, do not strip SourceCodeInfo from the FileDescriptorProto. This results in vastly larger descriptors that include information about the original location of each decl in the source file as well as surrounding comments.--dependency_out=FILEWrite a dependency output file in the format expected by make. This writes the transitive set of input file paths to FILE--error_format=FORMATSet the format in which to print errors. FORMAT may be 'gcc' (the default) or 'msvs' (Microsoft Visual Studio format).--print_free_field_numbersPrint the free field numbers of the messages defined in the given proto files. Groups share the same field number space with the parent message. Extension ranges are counted as occupied fields numbers.--plugin=EXECUTABLESpecifies a plugin executable to use. Normally, protoc searches the PATH for plugins, but you may specify additional executables not in the path using this flag. Additionally, EXECUTABLE may be of the form NAME=PATH, in which case the given plugin name is mapped to the given executable even if the executable's own name differs.--cpp_out=OUT_DIRGenerate C++ header and source. --csharp_out=OUT_DIRGenerate C# source file. --java_out=OUT_DIRGenerate Java source file. --js_out=OUT_DIRGenerate JavaScript source. --objc_out=OUT_DIRGenerate Objective C header and source. --php_out=OUT_DIRGenerate PHP source file. --python_out=OUT_DIRGenerate Python source file. --ruby_out=OUT_DIRGenerate Ruby source file.@Read options and filenames from file. If a relative file path is specified, the file will be searched in the working directory. The --proto_path option will not affect how this argument file is searched. Content of the file will be expanded in the position of @ as in the argument list. Note that shell expansion is not applied to the content of the file (i.e., you cannot use quotes, wildcards, escapes, commands, etc.). Each line corresponds to a single argument, even if it contains spaces.