英文:
Problems to use packages in Go
问题
我遇到了使用包的问题。我按照网上找到的步骤进行操作，但是出现了错误信息。
我在GOPATH中有这个包：
go/src/greet/day.go
package greet
var morning = "早上好"
var Morning = "嘿" + morning
我想在我的代码中导入它：
go/src/app/entry.go
package main
import (
"fmt"
"greet"
)
func main(){
fmt.Println(greet.Morning)
}
当我运行entry.go时，我收到以下消息：
entry.go:4:3: package greet is not in GOROOT (/usr/local/go/src/greet)
有人知道如何修复吗？
谢谢。
英文:
I'm having problems to use packages. I a following literally the steps I find online, but I have an error message.
I have this package in GOPATH:
go/src/greet/day.go
package greet
var morning = "Good morning"
var Morning = "hey" + morning
I want to import it in my code:
go/src/app/entry.go
package main
import ("fmt"
"greet")
func main(){
fmt.Println(greet.Morning)
}
When I run entry.go, I receive this message:
entry.go:4:3: package greet is not in GOROOT (/usr/local/go/src/greet)
Does anybody how to fix it?
Thank you.
答案1
得分: 1
GOPATH不再真正使用。您可以使用不同的目录并运行go mod init greet。这将在该文件夹中创建一个名为"greet"的新模块，并且在该模块内部，您可以使用import "{模块名称}/{包路径}"来导入包。最佳实践是使用文件夹名称作为包名称，以便导入路径与文件夹名称匹配（除了主包）。
此外，如果您的模块位于git存储库中，则模块名称应该是git存储库的路径。例如，go mod init github.com/jaenmo/myrepo。
在您的模块中创建一个文件夹用于主包。您应该能够使用您的模块名称进行导入。
英文:
GOPATH isn't really used anymore. You can use a different directory and run go mod init greet. This will create a new module "greet" in that folder, and from within that module you can import packages using import "{module name}/{package path}". It is a best practice to use the folder name as the package name, so the import path matches the folder names (except for main packages).
Additionally, if your module lives in a git repository, your module name should be the path to the git repository. for example, go mod init github.com/jaenmo/myrepo.
within your module make a folder for your main package. You should be able to import using your module name.
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