Function preUpgrade

apps/cli/tests/integration.test.ts:617–618

(dir: string)

    // from the `backup` command's .tar.gz archives), while the install is
    // already on latest (a no-op re-pull that must still succeed and stay up).
    const preUpgrade = (dir: string) =>
      (fs.existsSync(dir) ? fs.readdirSync(dir) : []).filter((f) => /^db-pre-upgrade-.*\.sql\.gz$/.test(f))

    it('a plain `update` writes a pre-upgrade backup, keeps the new image and stays healthy', async () => {
      const backupsDir = path.join(installDir, 'backups')