sort files into folders according to date (must be on same drive)

sorter.go

package main

import (
	"encoding/base64"
	"flag"
	"fmt"
	"io/fs"
	"os"
	"path/filepath"
	"strings"

	"lukechampine.com/frand"
)

var (
	inputDirectory  string
	outputDirectory string
)

func main() {
	var err error

	flag.StringVar(&inputDirectory, "input", "DCIM", "path to input directory")
	flag.StringVar(&outputDirectory, "output", "Raw", "path to output directory")
	flag.Parse()

	inputDirectory, err = filepath.Abs(inputDirectory)
	if err != nil {
		handleError(err)
	}

	outputDirectory, err = filepath.Abs(outputDirectory)
	if err != nil {
		handleError(err)
	}

	if err := process(); err != nil {
		handleError(err)
	}
}

func process() error {
	if err := filepath.WalkDir(inputDirectory,
		func(path string, d fs.DirEntry, err error) error {
			if err != nil {
				return err
			}

			if d.IsDir() {
				return nil
			}

			info, err := d.Info()
			if err != nil {
				return err
			}

			destDir := filepath.Join(outputDirectory, info.ModTime().Format("2006-01-02"))

			if err := os.MkdirAll(destDir, os.ModeDir); err != nil {
				return err
			}

			if err := os.Rename(path, filepath.Join(destDir, randomFileName(d.Name()))); err != nil {
				return err
			}

			return nil
		}); err != nil {
		return err
	}

	if err := os.RemoveAll(inputDirectory); err != nil {
		return err
	}

	return nil
}

func randomFileName(name string) string {
	return strings.TrimSuffix(name, filepath.Ext(name)) + "_" + base64.RawURLEncoding.EncodeToString(frand.Bytes(4)) + filepath.Ext(name)
}

func handleError(err error) {
	fmt.Fprintln(os.Stderr, err)
	os.Exit(1)
}