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How to define a variable in Go depending on the operating system
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How to define a variable in Go depending on the operating system
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I'm aware that I can name particular go files _windows.go, _linux.go, etc and that this will make them only compile for that particular operating system.
Within a file that doesn't have the go os specified in the filename, is there a way I can set a variable and/or constant within a file depending on the go os? Maybe in a case statement?
runtime.GOOS is your friend. However, keep in mind that you can't set constants based on it (although you can copy it to your own constant) - only variables, and only in runtime. You can use an init() function in a module to run the detection automatically when the program starts.
package main
import "fmt"
import "runtime"
func main() {
fmt.Println("this is", runtime.GOOS)
foo := 1
switch runtime.GOOS {
case "linux":
foo = 2
case "darwin":
foo = 3
case "nacl": //this is what the playground shows!
foo = 4
default:
fmt.Println("What os is this?", runtime.GOOS)
}
fmt.Println(foo)
}
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