go - 为什么Go在项目子目录中找不到导入包？

Question

当我使用dev_appserver.py启动应用程序时，此导入工作正常

我正在尝试重构以使用Firestore and Go 1.13

app.go内容

package main
import (
    "net/http"
    "workout"
)

项目结构:

app.go  
|-- workout dir  
    |-- workout.go file that contains (package workout)  

从工作目录的根目录运行:
$运行* .go

app.go:15:2: cannot find package "workout" in any of:
    /usr/local/go/src/workout (from $GOROOT)
    /Users/X/go/src/workout (from $GOPATH)

$ go run *.go workout/*.go
named files must all be in one directory; have ./ and workout/
X@MacBook-Pro Thu Oct 31 10:48:13 ~/Dropbox/go/src/workoutNew 

$ go build   
app.go:15:2: cannot find package "workout" in any of:
    /usr/local/go/src/workout (from $GOROOT)
    /Users/X/go/src/workout (from $GOPATH)

Answer 1

import (
 "workout"
)

这将尝试导入名为 workout的stdlib程序包。

为了导入 workout软件包，您应该命名主软件包(使用 go mod init)，例如: github.com/me/myapp，然后将 workout软件包导入为 github.com/me/myapp/workout。

也可以将 workout导入为相对目录(“./workout”)，但这不是推荐的方式。