Function resolveRollbackTarget

src/cli/rollback.ts:98–156

(
  target: string | undefined,
  options: RollbackOptions,
)

}

async function resolveRollbackTarget(
  target: string | undefined,
  options: RollbackOptions,
): Promise<string> {
  if (options.safe) {
    const safeVersion = await getMaxVersion()
    if (!safeVersion) {
      throw new Error('No safe rollback version is currently configured.')
    }
    return safeVersion
  }

  if (target && /^\d+$/.test(target)) {
    const stepsBack = Number.parseInt(target, 10)
    const history = await getVersionHistory(TARGET_RESOLUTION_HISTORY_LIMIT)
    if (history.length === 0) {
      throw new Error('Unable to load version history for rollback.')
    }

    const currentIndex = history.indexOf(MACRO.VERSION)
    if (currentIndex === -1) {
      throw new Error(
        `Current version ${MACRO.VERSION} was not found in the recent version history.`,
      )
    }

    const targetIndex = currentIndex + stepsBack
    if (targetIndex >= history.length) {
      throw new Error(
        `Only ${history.length - currentIndex - 1} older version(s) are available from the recent history window.`,
      )
    }

    return history[targetIndex]!
  }

  if (target) {
    return target
  }

  const history = await getVersionHistory(TARGET_RESOLUTION_HISTORY_LIMIT)
  if (history.length === 0) {
    throw new Error('Unable to load version history for rollback.')
  }

  const currentIndex = history.indexOf(MACRO.VERSION)
  if (currentIndex === -1) {
    throw new Error(
      `Current version ${MACRO.VERSION} was not found in the recent version history.`,
    )
  }

  const targetIndex = currentIndex + 1
  if (targetIndex >= history.length) {
    throw new Error('No older published version is available to roll back to.')
  }

  return history[targetIndex]!