install-binary.sh will not run due to unbound variable

[spuder]

If you try and install in a docker container (e.g. alpine), you will get this error

docker run -it --rm alpine bash
wget -q  https://raw.githubusercontent.com/futuresimple/helm-secrets/master/install-binary.sh
chmod +x ./install-binary.sh
./install-binary.sh
bash: line 18: HELM_BIN: unbound variable

This is because the script is running with set -u.

How are others automating the installation?

[spuder]

work around

export HELM_BIN=$(which helm)