install-helm.sh

#!/bin/sh
set -e
set -o pipefail
echo '>> Prepare...'
mkdir -p /tmp/helm/bin
mkdir -p /tmp/helm/publish
apk update
apk add ca-certificates git openssh

[ -z "$HELM_VERSION" ] && HELM_VERSION=3.3.3

echo '>> Installing Helm...'
cd /tmp/helm/bin
wget "https://get.helm.sh/helm-v${HELM_VERSION}-linux-amd64.tar.gz"
tar -zxf "helm-v${HELM_VERSION}-linux-amd64.tar.gz"
chmod +x linux-amd64/helm
alias helm=/tmp/helm/bin/linux-amd64/helm
helm version