Check if redmatrix is installed

install-freedombone.sh

 REDMATRIX_REPO="https://github.com/friendica/red.git"
 REDMATRIX_ADDONS_REPO="https://github.com/friendica/red-addons.git"
 REDMATRIX_ADMIN_PASSWORD=
-REDMATRIX_INSTALLED="no"
 
 # Domain name or freedns subdomain for Owncloud installation
 OWNCLOUD_DOMAIN_NAME=
       echo 'echo "Obtaining GNU Social database backup"' >> /usr/bin/$BACKUP_SCRIPT_NAME
       echo "mysqldump --password=$MARIADB_PASSWORD gnusocial > /home/$MY_USERNAME/tempfiles/gnusocial.sql" >> /usr/bin/$BACKUP_SCRIPT_NAME
   fi
-  if [[ $REDMATRIX_INSTALLED == "yes" ]]; then
+  if grep -Fxq "install_redmatrix" $COMPLETION_FILE; then
       echo 'echo "Obtaining Red Matrix database backup"' >> /usr/bin/$BACKUP_SCRIPT_NAME
       echo "mysqldump --password=$MARIADB_PASSWORD redmatrix > /home/$MY_USERNAME/tempfiles/redmatrix.sql" >> /usr/bin/$BACKUP_SCRIPT_NAME
   fi
       echo 'fi' >> /usr/bin/$RESTORE_SCRIPT_NAME
   fi
 
-  if [[ $REDMATRIX_INSTALLED == "yes" ]]; then
+  if grep -Fxq "install_redmatrix" $COMPLETION_FILE; then
       echo "if [ -f /home/$MY_USERNAME/tempfiles/redmatrix.sql ]; then" >> /usr/bin/$RESTORE_SCRIPT_NAME
       echo '  echo "Restoring Red Matrix database"' >> /usr/bin/$RESTORE_SCRIPT_NAME
       echo "  mysql -u root --password=$MARIADB_PASSWORD redmatrix -o < /home/$MY_USERNAME/tempfiles/redmatrix.sql" >> /usr/bin/$RESTORE_SCRIPT_NAME
       echo "  mysqldump --password=$MARIADB_PASSWORD gnusocial > /home/$MY_USERNAME/tempfiles/gnusocial.sql" >> /usr/bin/$BACKUP_TO_FRIENDS_SCRIPT_NAME
       echo 'fi' >> /usr/bin/$BACKUP_TO_FRIENDS_SCRIPT_NAME
   fi
-  if [[ $REDMATRIX_INSTALLED == "yes" ]]; then
+  if grep -Fxq "install_redmatrix" $COMPLETION_FILE; then
       echo 'if [ -f /var/backups/redmatrix_daily.sql ]; then' >> /usr/bin/$BACKUP_TO_FRIENDS_SCRIPT_NAME
       echo "  cp /var/backups/redmatrix_daily.sql /home/$MY_USERNAME/tempfiles/redmatrix.sql" >> /usr/bin/$BACKUP_TO_FRIENDS_SCRIPT_NAME
       echo 'else' >> /usr/bin/$BACKUP_TO_FRIENDS_SCRIPT_NAME
       echo 'fi' >> /usr/bin/$RESTORE_FROM_FRIEND_SCRIPT_NAME
   fi
 
-  if [[ $REDMATRIX_INSTALLED == "yes" ]]; then
+  if grep -Fxq "install_redmatrix" $COMPLETION_FILE; then
       echo "if [ -f /home/$MY_USERNAME/tempfiles/redmatrix.sql ]; then" >> /usr/bin/$RESTORE_FROM_FRIEND_SCRIPT_NAME
       echo '  echo "Restoring Red Matrix database"' >> /usr/bin/$RESTORE_FROM_FRIEND_SCRIPT_NAME
       echo "  mysql -u root --password=$MARIADB_PASSWORD redmatrix -o < /home/$MY_USERNAME/tempfiles/redmatrix.sql" >> /usr/bin/$RESTORE_FROM_FRIEND_SCRIPT_NAME
       chown $MY_USERNAME:$MY_USERNAME /home/$MY_USERNAME/README
   fi
 
-  REDMATRIX_INSTALLED="yes"
   echo 'install_redmatrix' >> $COMPLETION_FILE
 }