a sample to get the current directory of the executed program.

cd.go

package main

import (
	"log"
	"os"
	"path/filepath"
)

const (
	exitCodeOK int = iota
	exitCodeFailed
)

var (
	fullpath string
	cd       string
)

func init() {
	var err error
	fullpath, err = os.Executable()
	if err != nil {
		log.Println("Failed to initialize", err)
	}
	cd = filepath.Dir(fullpath)
}

func main() {
	os.Exit(run(os.Args))
}

func run(args []string) int {
	err := work()
	if err != nil {
		log.Println("Failed to execute the work:", err)
		return exitCodeFailed
	}
	return exitCodeOK
}

func work() error {
	log.Println("fullpath is ", fullpath)
	log.Println("cd is ", cd)
	return nil
}

A sample that saves the full path of the program and the directory path of the program in the variable at startup. 😄