Cannot Reinstall Java after Upgrade to v8.0.2

[cube-one-gxp-lifescience-partner]

Describe the bug Since the upgrade to v8.0.2 reinstalling the java dependencies does not work as there is an issue with the getHash function on installing the dependencies.

To Reproduce Steps to reproduce the behavior: Follow Steps in #1409 (comment)

Expected behavior Dependencies should be installed.

Environment information (please complete the following information):

• OS: Alpine (Nextcloud AIO)
• Firefox
• LibreSign Version 8.0.2
• Nextcloud Server Version 28.0.5
• Logs:

  An unhandled exception has been thrown:
  TypeError: OCA\Libresign\Service\Install\InstallService::getHash(): Return value must be of type string, null returned in /var/www/html/custom_apps/libresign/lib/Service/Install/InstallService.php:699
  Stack trace:
  #0 /var/www/html/custom_apps/libresign/lib/Service/Install/InstallService.php(359): OCA\Libresign\Service\Install\InstallService->getHash(Object(OC\Files\SimpleFS\SimpleFolder), 'java', 'OpenJDK21U-jre_...', '21.0.2_13', 'https://github....')
  #1 /var/www/html/custom_apps/libresign/lib/Command/Install.php(75): OCA\Libresign\Service\Install\InstallService->installJava()
  #2 /var/www/html/3rdparty/symfony/console/Command/Command.php(298): OCA\Libresign\Command\Install->execute(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
  #3 /var/www/html/core/Command/Base.php(177): Symfony\Component\Console\Command\Command->run(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
  #4 /var/www/html/3rdparty/symfony/console/Application.php(1040): OC\Core\Command\Base->run(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
  #5 /var/www/html/3rdparty/symfony/console/Application.php(301): Symfony\Component\Console\Application->doRunCommand(Object(OCA\Libresign\Command\Install), Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
  #6 /var/www/html/3rdparty/symfony/console/Application.php(171): Symfony\Component\Console\Application->doRun(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
  #7 /var/www/html/lib/private/Console/Application.php(213): Symfony\Component\Console\Application->run(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
  #8 /var/www/html/console.php(100): OC\Console\Application->run()
  #9 /var/www/html/occ(11): require_once('/var/www/html/c...')
  #10 {main}

[vitormattos]

Good point.

Have a cache of hash file. You can handmade delete the cache file from data/appdata_<instanceid>/libresign/checksum_*. You can delete all hash files. After this, run the command: occ files:scan-app-data libresign. Doing this will be more fast than launch a new release setting a new name to this temporary file.