How to uninstall a Helm release only if it exists
The trick is the --ignore-not-found flag available in recent versions of Helm. For example,
$ helm uninstall --ignore-not-found the-release
release "my-release" uninstalledwill uninstall release the-release.
Note that Helm—at least in v3.14.2—will always print that it uninstalled the release even if it didn’t exist before.
