syntax="proto3";
package xxxx;

message Data{
	string name=1; //optional|required;  # 默认 optional 
	int32 age=2;
	// repeated  array
}

message Response{
	string xx=1;
	int64 abc=2;
	repeated string yy=3;
}

//rpc
service SSS{
	rpc Sssa(Data) returns(Response){}
}

apt update
apt install unzip wget git -y
cd ~
mkdir protoc
#.. golang v1.12.7
wget -c https://dl.google.com/go/go1.12.7.linux-amd64.tar.gz
tar -zxvf go1.12.7.linux-amd64.tar.gz

#1. protoc  -> unzip & PATH
# https://github.com/protocolbuffers/protobuf/releases
wget -c https://github.com/protocolbuffers/protobuf/releases/download/v3.9.0/protoc-3.9.0-linux-x86_64.zip  && \
unzip -d ~/protoc/ protoc-3.9.0-linux-x86_64.zip
echo PATH="\$PATH:$HOME/protoc/bin:$HOME/go/bin:$GOPATH/bin" >> ~/.bashrc
echo export PATH >> ~/.bashrc
echo export GOPATH=$HOME/gopath >> ~/.bashrc


#2. protoc-gen-go 插件 
go get -u -v github.com/golang/protobuf/protoc-gen-go


#3. gprc 插件  
go get -u -v google.golang.org/grpc


source .bashrc
go version
protoc --version

# protoc   --xx_out=OUT_DIR   file.proto   # xx==language
# --xx_out  =调用=> protoc-gen-xx
protoc --go_out=./   xxxx.proto   # xxxx.pb.go

#gprc### grpc 插件,需要安装
protoc --go_out=plugins=grpc:.   xxxx.proto


protoc -I DIR  --go_out=plugins=grpc:OUTDIR   xxxx.proto
# INDIR/xxxx.proto
# 或者不要 -I  直接在后边写    INDIR/xxxx.proto