Function rollback

src/cli/rollback.ts:158–216

(
  target: string | undefined,
  options: RollbackOptions = {},
)

}

export async function rollback(
  target: string | undefined,
  options: RollbackOptions = {},
): Promise<void> {
  try {
    if (options.list) {
      await listVersions()
      return
    }

    const resolvedTarget = await resolveRollbackTarget(target, options)
    if (options.dryRun) {
      writeToStdout(
        `Would roll back from ${MACRO.VERSION} to ${resolvedTarget}.\n`,
      )
      await gracefulShutdown(0)
      return
    }

    writeToStdout(
      chalk.yellow(`Rolling back from ${MACRO.VERSION} to ${resolvedTarget}...`) +
        '\n',
    )

    const result = await installLatest(resolvedTarget, false)
    if (result.lockFailed) {
      const pidInfo = result.lockHolderPid
        ? ` (PID ${result.lockHolderPid})`
        : ''
      writeToStderr(
        `Another Code process${pidInfo} is currently running. Please try again in a moment.\n`,
      )
      await gracefulShutdown(1)
      return
    }

    if (!result.latestVersion) {
      writeToStderr('Rollback failed: unable to install the requested version.\n')
      await gracefulShutdown(1)
      return
    }

    if (result.latestVersion === MACRO.VERSION) {
      writeToStdout(
        chalk.yellow(`Already running ${result.latestVersion}.`) + '\n',
      )
      await gracefulShutdown(0)
      return
    }

    writeToStdout(
      chalk.green(`Rolled back to ${result.latestVersion}.`) + '\n',
    )
    await gracefulShutdown(0)
  } catch (error) {
    writeToStderr(`Rollback failed: ${error instanceof Error ? error.message : String(error)}\n`)
    await gracefulShutdown(1)
  }