package file

import (
	"fmt"
	"io"
	"os"
)

// Copy copies a file from src to dest
func Copy(src, dest string) error {
	fi, err := os.Lstat(src)
	if err != nil {
		return err
	}

	srcFi, err := os.Open(src)
	if err != nil {
		return fmt.Errorf("could not open src: %w", err)
	}
	defer srcFi.Close()

	destFi, err := os.Create(dest)
	if err != nil {
		return fmt.Errorf("could not create dest: %w", err)
	}
	defer destFi.Close()

	if err := os.Chmod(dest, fi.Mode()); err != nil {
		return err
	}

	if _, err := io.Copy(destFi, srcFi); err != nil {
		return fmt.Errorf("could not copy %s to %s: %w", src, dest, err)
	}
	return nil
}