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kratos/doc/wiki-cn/kratos-protoc.md

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### kratos tool protoc
```shell
# generate all
kratos tool protoc api.proto
# generate gRPC
kratos tool protoc --grpc api.proto
# generate BM HTTP
kratos tool protoc --bm api.proto
# generate ecode
kratos tool protoc --ecode api.proto
# generate swagger
kratos tool protoc --swagger api.proto
```
执行生成如 `api.pb.go/api.bm.go/api.swagger.json/api.ecode.go` 的对应文件,需要注意的是:`ecode`生成有固定规则,需要首先是`enum`类型,且`enum`名字要以`ErrCode`结尾,如`enum UserErrCode`。详情可见:[example](https://github.com/go-kratos/kratos/tree/master/example/protobuf)
> 该工具在Windows/Linux下运行,需提前安装好 [protobuf](https://github.com/google/protobuf) 工具
`kratos tool protoc`本质上是拼接好了`protoc`命令然后进行执行,在执行时会打印出对应执行的`protoc`命令,如下可见:
```shell
protoc --proto_path=$GOPATH --proto_path=$GOPATH/github.com/go-kratos/kratos/third_party --proto_path=. --bm_out=:. api.proto
protoc --proto_path=$GOPATH --proto_path=$GOPATH/github.com/go-kratos/kratos/third_party --proto_path=. --gofast_out=plugins=grpc:. api.proto
protoc --proto_path=$GOPATH --proto_path=$GOPATH/github.com/go-kratos/kratos/third_party --proto_path=. --bswagger_out=:. api.proto
protoc --proto_path=$GOPATH --proto_path=$GOPATH/github.com/go-kratos/kratos/third_party --proto_path=. --ecode_out=:. api.proto
```
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