package main

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

func IsSymlink(path string) (bool, error) {
	var isSymlink bool
	stat, err := os.Lstat(path)

	if err != nil {
		return isSymlink, err
	}

	isSymlink = (stat.Mode() & os.ModeSymlink) == os.ModeSymlink

	return isSymlink, nil
}

func main() {
	// create temporary file
	tmpFile, err := os.CreateTemp("", "tmpfile")

	if err != nil {
		panic(err)
	}

	defer os.Remove(tmpFile.Name())

	fmt.Println("Temp file name:", tmpFile.Name())

	symlinkPath := filepath.Join(os.TempDir(), "tmpsymlink")

	// create symlink
	err = os.Symlink(tmpFile.Name(), symlinkPath)

	if err != nil {
		panic(err)
	}

	defer os.Remove(symlinkPath)

	// check if file is symlink
	isSymlink, err := IsSymlink(symlinkPath)

	if err != nil {
		panic(err)
	}

	fmt.Printf("'%s' is symlink: %v", symlinkPath, isSymlink)

}

// $ go run main.go 
// Temp file name: /tmp/tmpfile1471080551
// '/tmp/tmpsymlink' is symlink: true