Golang build失败

使用go mod管理依赖时，build出现问题

复现

$ go build test.go

出现以下错误：

test.go:9:8: no required module provides package github.com/Unknwon/goconfig: working directory is not part of a module
test.go:10:8: no required module provides package gopkg.in/confluentinc/confluent-kafka-go.v1/kafka: working directory is not part of a module

原因

未初始化模块

解决方案

go mod init
go mod init example.com/m
go get github.com/Unknwon/goconfig
go build test.go 

up@up123:~/scripts$ go mod init
go: cannot determine module path for source directory /home/up/scripts (outside GOPATH, module path must be specified)

Example usage:
        'go mod init example.com/m' to initialize a v0 or v1 module
        'go mod init example.com/m/v2' to initialize a v2 module

Run 'go help mod init' for more information.



up@up123:~/scripts$ go mod init example.com/m
go: creating new go.mod: module example.com/m
go: to add module requirements and sums:
        go mod tidy


up@up123:~/scripts$ go build test.go 
asset_traffic_producer.go:9:8: no required module provides package github.com/Unknwon/goconfig; to add it:
        go get github.com/Unknwon/goconfig
asset_traffic_producer.go:10:8: no required module provides package gopkg.in/confluentinc/confluent-kafka-go.v1/kafka; to add it:
        go get gopkg.in/confluentinc/confluent-kafka-go.v1/kafka


up@up123:~/scripts$ go get github.com/Unknwon/goconfig
go get: added github.com/Unknwon/goconfig v0.0.0-20200908083735-df7de6a44db8

up@up123:~/scripts$ go get gopkg.in/confluentinc/confluent-kafka-go.v1/kafka
go get: added github.com/confluentinc/confluent-kafka-go v1.6.1
go get: added gopkg.in/confluentinc/confluent-kafka-go.v1 v1.6.1


up@up123:~/scripts$ go build test.go