Go embed example:/Golang embed tutorial: Embed subdirectory of files at compile time, then display names at runtime

listEmbeddedDir

package main

import (
	"embed"
	"fmt"
	"io/fs"
)

// The following embeds all files and subdirectories
// from the themes subdirectory of this package into
// the executable. So have the subdirectory available
// at compile time. Then you can run the finished
// executable anywhere and it will display the
// list of files even though the themes directory
// doesn't exist at runtime.

//go:embed themes/*
var themeFiles embed.FS

// listEmbeddedDir() displays the filenames in the embedded 
// directory named theme.
func listEmbeddedDir(files embed.FS) error {
	fs.WalkDir(files, ".", func(path string, d fs.DirEntry, err error) error {
		if err != nil {
			return err
		}
		fmt.Println(path)
		return nil
	})
	return nil
}
func main() {
	listEmbeddedDir(themeFiles)
}