docker - Docker golang包导入错误: import path does not begin with hostname

我正在尝试测试docker并进行项目。这是我的dockerfile

FROM golang

ARG app_env
ENV APP_ENV $app_env

COPY ./ /go/src/github.com/user/myProject/app
WORKDIR /go/src/github.com/user/myProject/app



RUN go get ./
RUN go build

CMD if [ ${APP_ENV} = production ]; \
then \
app; \
else \
go get github.com/pilu/fresh && \
fresh; \
fi
EXPOSE 8080

运行正常。然后我在go程序中添加了“testpack”包。

package main

import(
"fmt"
"time"
"testpack"
)

var now = time.Now()
var election = time.Date(2016, time.November, 8, 0, 0, 0, 0, time.UTC)
func main() {
 //get duration between election date and now
tillElection := election.Sub(now)
//get duration in nanoseconds
toNanoseconds := tillElection.Nanoseconds()
//calculate hours from toNanoseconds
hours := toNanoseconds/3600000000000
remainder := toNanoseconds%3600000000000
//derive minutes from remainder of hours
minutes := remainder/60000000000
remainder = remainder%60000000000
//derive seconds from remainder of minutes
seconds := remainder/1000000000
//calculate days and get hours left from remainder
days := hours/24
hoursLeft := hours%24

fmt.Printf("\nHow long until the 2016 U.S. Presidential election?\n\n%v Days %v Hours %v Minutes %v Seconds\n\n", days, hoursLeft, minutes, seconds)

}

现在我跑=> docker build ./

我收到一个错误

程序包testpack:无法识别的导入路径“testpack”(导入路径不是以主机名开头)

我尝试了这个Error 'import path does not begin with hostname' when building docker with local package，但无法解决

任何帮助表示赞赏。

最佳答案

显然，它正在尝试从Internet加载它，因为它在您的GOPATH中找不到“testpack”。

您没有向我们显示您的GOPATH设置，也没有向您显示“testpack”的复制位置，因此，除了说“它丢失了”外，我只能告诉您。

阅读https://golang.org/cmd/go/#hdr-Relative_import_paths

尝试之一

import "./testpack"

在Dockerfile中将GOPATH设置为“/go”import "github.com/user/myProject/app/testpack"