Latest jar scripts doesn't update server

[Jakesta13]

The jar files are downloaded correctly but when uploading, ncftp doesn't replace the jar file.
The jar file must be deleted prior to uploading ...

[Jakesta13]

Possibly fixed, will close once confirmed -- this will be tested when mojang releases another version.
See lftp in related commit

[Jakesta13]

Not entirely fixed -- only works when manually ran.. running through cron-job doesn't seem to work, it only deletes the jar to replace, thus temporarily disabling the server. Debugging is being conducted.

[Jakesta13]

Should be fixed in latest push, I forgot to add BASE_DIR variable to the download of the jar files, so it would work manually but not when automatically ran via cronjob.

see latest release for changes.

Will close once verified.

[Jakesta13]

Successfully updated to 19w02a automatically, though will wait until next snapshot for complete verification that there isn't another problem with the script before closing this issue.

[Jakesta13]

Fixed.
Download file is checked if it contains text or not. If the file appears blank then the script will abort.

Also, the jar file that this script will replace is deleted before being replaced.