Function backupFile

src/utils/files.ts:4–15

(filePath: string)

import path from "path"

export async function backupFile(filePath: string): Promise<string | null> {
  if (!(await pathExists(filePath))) return null

  try {
    const timestamp = new Date().toISOString().replace(/[:.]/g, "-")
    const backupPath = `${filePath}.bak.${timestamp}`
    await fs.copyFile(filePath, backupPath)
    return backupPath
  } catch {
    return null
  }
}

export async function pathExists(filePath: string): Promise<boolean> {
  try {