fabric部署链码报错找不到包cid: cannot find

今天在fabric链码中加入了cid包，结果实例化出现了问题，搜索了网上N条解决方案无果，后在开源社区群中经大佬指点，使用govendor解决～
毕竟网上直接给出解决方案的文章太稀少，在此分享一下，希望能帮到大家。

报错如下：

实例化链码失败: sending deploy transaction proposal failed: Multiple errors occurred: - Transaction processing for endorser [st:7151]: Chaincode status Code: (500) UNKNOWN. Description: error starting container: error starting container: Failed to generate platform-specific docker build: Error returned from build: 1 "chaincode/input/src/questionbank-api/chaincode/utils.go:6:2: cannot find package "github.com/hyperledger/fabric/core/chaincode/lib/cid" in any of:
        /opt/go/src/github.com/hyperledger/fabric/core/chaincode/lib/cid (from $GOROOT)
        /chaincode/input/src/github.com/hyperledger/fabric/core/chaincode/lib/cid (from $GOPATH)
        /opt/gopath/src/github.com/hyperledger/fabric/core/chaincode/lib/cid
" - Transaction processing for endorser [localhost:7051]: Chaincode status Code: (500) UNKNOWN. Description: error starting container: error starting container: Failed to generate platform-specific docker build: Error returned from build: 1 "chaincode/input/src/questionbank-api/chaincode/utils.go:6:2: cannot find package "github.com/hyperledger/fabric/core/chaincode/lib/cid" in any of:
        /opt/go/src/github.com/hyperledger/fabric/core/chaincode/lib/cid (from $GOROOT)
        /chaincode/input/src/github.com/hyperledger/fabric/core/chaincode/lib/cid (from $GOPATH)
        /opt/gopath/src/github.com/hyperledger/fabric/core/chaincode/lib/cid
"

解决方案：
安装govendor：

#可能需要管理员权限进行安装
go get github.com/kardianos/govendor

进入链码文件夹中：

govendor init
govendor add +external