Move images from sub-directories to base

mover.go

package main

import (
	"fmt"
	"errors"
	"io/ioutil"
	"path/filepath"
	"path"
	"os"
	"log"
)

type ImgMover struct {
	basedir string
}

func (imgMover ImgMover) move() error {
	if fileExists(imgMover.basedir) {
		fmt.Println()
		return errors.New("'" + imgMover.basedir + "' does not exist!")
	}

	files, err := ioutil.ReadDir(imgMover.basedir)
	if err != nil {
		return err
	}

	for _, f := range files {
		fmt.Println(f.Name())

		if f.IsDir() {
			err = filepath.Walk(path.Join(imgMover.basedir, f.Name()), imgMover.visit)
			fmt.Printf("filepath.Walk() returned %v\n", err)
		}
	}

	return nil
}

func (imgMover ImgMover) isImg(f os.FileInfo) bool {
	exts := [6]string{".png", ".jpg"}

	ext := filepath.Ext(f.Name())

	for _, b := range exts {
		if b == ext {
			return true
		}
	}
	return false
}

func (imgMover ImgMover) visit(filePath string, f os.FileInfo, err error) error {
	if imgMover.isImg(f) {
		dest := path.Join(imgMover.basedir, f.Name())
		fmt.Printf("Rename: %s -> %s\n", filePath, dest)
		os.Rename(filePath, dest)
	}

	return nil
}

func fileExists(file string) bool {
	_, err := os.Stat(file)
	return os.IsNotExist(err)
}

func main() {
	if len(os.Args) == 1 {
		fmt.Println("no args")
		os.Exit(-1)
	}

	dir := os.Args[1]
	imgMover := ImgMover{basedir:dir}
	err := imgMover.move()
	if err != nil {
		log.Fatal(err)
	}
}

Simple Go script to move any images from subdirectories to the specified base directory.