findFilesWithName.go

package main

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

func main() {
	fmt.Println(findFiles("test"))
}

func findFiles(name string, dir string) []string {
	searchPath := filepath.FromSlash(dir)
	var files []string
	filepath.Walk(searchPath, func(path string, f os.FileInfo, _ error) error {
		if !f.IsDir() {
			match, err := regexp.MatchString(name, f.Name())
			if err == nil && match {
				files = append(files, f.Name())
			}
		}
		return nil
	})
	return files
}