I would like to know if it is possible to abort a helm install after I have fired it. I could not find anything in under helm install --help or helm update --help.
I think all you can do is abort the command from the command line with control-C or command-C (assuming you ran it manually, if it's from CI then you can presumably abort the job). Then you can do helm list to find the new release and helm delete <release_name> --purge --no-hooks, since it's an install (it would be trickier if it were an upgrade).