在golang中的包之间共享常量

Question

I’ve the following code which require multiple packages in cmd package

PATH_SEP = string(os.PathSeparator)

my project structure is like following

go/src/my proj
-cmd
--runners
--otherpackage
-- package2
-- constants
--…. 

in constants i put the code

PATH_SEP = string(os.PathSeparator)
const2 etc

and in runners and package2/3 etc I use this constant.

is it OK ? otherwise I need to duplicate the code for other packages .

Answer 1

I would suggest to declare struct with constant fields and import that struct in any package you wants to use the constants.

package cmd
type Constants struct{
    const1 int
    const2 int
}

It would be better to have a separate file for constants. Create a file called global.go which contains all constant structs to be used in different packages that way your code would be cleaner.

Note: We require constants to be shared in multiple files, so it will be better to import the package containing constants. Rather than package containing methods and other details even if we do not need them.