报错protoc-gen-go: program not found or is not executable

找到protoc-gen-go 文件，执行以下命令，该文件通过go get安装时会安装在$GOPATH/go/bin目录下：cp protoc-gen-go /usr/local/bin/
然后执行 vim ~/.bash_profile：
添加export GOPATH=$HOME/go PATH=$PATH:$GOPATH/bin

再执行source ~/.bash_profile即可。

若遇报错protoc-gen-go: unable to determine Go import path for "algo_dou.proto"，

则proto文件添加option go_package = "./";