goprogram-entry-pointgo-toolchain

Go file not running which is not in main package

I have a very simple Go project setup. At root directory I have go.mod file and main.go and a folder called main2. Inside main2 folder there is main2.go file.

/
|_ go.mod
|_ main.go
|_ main2
   |_ main2.go

From root directory I am trying to run go run command

go run main2/main2.go

and it throws error:

package command-line-arguments is not a main package

Can someone help?

Solution

  • The package of your main2.go file must be main. When there is a main package, and a function main in your project, the compiler knows it will be compiled as a executable, and not as a library.

    So try to change package command-line-arguments to package main inside the main2/main2.go file.