Plasti Mend is the stuff to use for ABS plastic repairs. It is basically thickened ABS cement. Sometimes Oatley ABS cement can be purchased at Home Depot or Lowes. Depends on location. It is much cheaper than Plasti Mend with shipping. A little 4oz can is about $3. The patch can be reinforced with fiberglass cloth (4oz or 6oz). You can even melt down ABS shavings in acetone to make your own glue.
Eternabond tape will NOT provide a lasting repair. It WILL create a huge mess when it comes time to fix the leak correctly.