Find the path to the executable

Question

I compile a program with Go for various platforms and run it by calling a relative path or just by its name (if it is in the PATH variable).

Is it possible to find out where the executable is?

Say, my program is called "foo(.exe)". I can run ./foo, foo (if it's in the PATH), ../../subdir/subdir/foo.

I have tried to use os.Args[0] and I guess I should check if the program name contains something different besides "foo". If yes, use filepath.Abs, if no, use (I can't find the function name, there is a function that looks through the PATH to check where the program is).

Answer 1

Use package osext.

It's providing function Executable() that returns an absolute path to the current program executable. It's portable between systems.

Online documentation

package main  import (     "github.com/kardianos/osext"     "fmt" )  func main() {     filename, _ := osext.Executable()     fmt.Println(filename) } 

Answer 2

You can use os.Executable for getting executable path on Go 1.8 or above version.

import (     "os"     "path"     "log" )  func main() {     ex, err := os.Executable()     if err != nil { log.Fatal(err) }     dir := path.Dir(ex)     log.Print(dir) }