Cronjob-capable shell script to download backups from Mantis bugtracker

This script:

• automatically logs in to Mantis, see section "Configuration" in the script.
• tells Mantis to create a fresh backup.
• checks whether the date of the backup as reported by Mantis matches the local time to ensure backup creation worked.
• downloads the backup into a directory called YYYY-MM-DD, or fails if it already exists.
• tests the CRCs of the zip files of the backup.
• sets the timestamps of the zip files to that of the newest contained file.
• aborts with non-zero exit code and prints an error if any of the above fails. If your have a working mail command available on your system cron daemons such as anachron will typically mail this output to you.
• prints nothing upon success to ensure you don't get unnecessary emails from cron.

Notice: As of 2018 it seems the feature to create a backup on the web interface is only available on MantisHub, not in stock Mantis. Hence this script likely only will work with MantisHub.

Script for encrypting the backups

As a bonus feature the script encrypt-mantis-backup can be used to:

• encrypt the backup of the current day to a recipient's GPG key and create a signature file (make sure the user which runs it has a GPG private key which is not password protected!).
• automatically download the recipient's GPG key at every run to check for revocation.
• place the encrypted and signed backup in a different directory, and set the permissions of the directory / files as specified. This e.g. allows putting the encrypted backup on a web server for distribution.

Dependencies

apt-get install bash wget grep unzip gnupg

Configuration

Please make sure to populate the scripts' Configuration sections before using them, they cannot be used without configuration.

You can configure the scripts to run in a cronjob if you obey the following:

• don't run more often than once per day. Don't run close to midnight. These are necessary as the scripts use the current day as directory names and validate whether the date matches the date which Mantis claims the backup is from.
• ideally create a separate user account to contain the scripts so there can be a single non-password-protected key for the encrypt-mantis-backup script.