Importing Code from Adjacent File in Go
In Go, a program is defined by a single un- imported main package. You can't have multiple main packages in a program, so if you want to make a library, e.g. your foo dir, you need to define a different package name.
Imports are handled in Go as follows:
1. They are taken relative to $GOPATH.
2. You can't import a package relative to a specific file.
Example:
Consider the following code:
hello.go:
package main
import . "huru/foo"
func main() {
SayHi()
}
foo/side.go:
package foo
import "fmt"
func SayHi() {
fmt.Println("Hello from side.go");
}
In this example, the hello.go program imports the huru/foo package and calls the SayHi() function, which is defined in the foo/side.go file.
This code will work fine as long as the package names are different. In this case, main and foo are different package names.
Additional Points:
* You can't use main as the package name of huru/foo/side.go, because it's already used in the huru/hello.go.
* It's better to use the folder name as the package name.