utils/fs.go

package utils

import (
	"os"
	"path/filepath"
)

// TreeSize walks a directory tree and returns its total size in bytes.
func TreeSize(dir string) (size int64, err error) {
	err = filepath.Walk(dir, func(d string, fileInfo os.FileInfo, e error) error {
		// Ignore directory sizes
		if fileInfo.IsDir() {
			return nil
		}
		size += fileInfo.Size()
		return nil
	})
	return
}