pre-commit script fails on macOS

[makkes]

What happened:
on macOS, the scripts/pre-commit.sh doesn't work:

[...]
Configuring container registry on host
Password:
./scripts/create-clusters.sh: line 76: 3: unbound variable

What you expected to happen:
pre-commit runs and returns successfully (exit code 0).

How to reproduce it (as minimally and precisely as possible):
on macOS, run:

DOWNLOAD_BINARIES=y bash -x ./scripts/pre-commit.sh

Anything else we need to know?:

Environment:

• Kubernetes version (use kubectl version)
• KubeFed version
• Scope of installation (namespaced or cluster)
• Others

/kind bug

[makkes]

Doesn't happen, anymore.