FROM ruby:3.1-alpine
MAINTAINER GitLab Engineering Productivity Team

ENV KUBECTL_VERSION=1.23.0

ENV HELM_VERSION=3.9.4
ENV HELM_URL=https://get.helm.sh/helm-v${HELM_VERSION}-linux-amd64.tar.gz
ENV HELM_HOME=/root/.helm

# Install dependencies
RUN apk --no-cache -U add openssl curl tar gzip bash ca-certificates git \
  && mkdir -p /opt

# Install kubectl
RUN wget https://dl.k8s.io/release/v${KUBECTL_VERSION}/bin/linux/amd64/kubectl \
  && install -o root -g root -m 0755 kubectl /usr/local/bin/kubectl \
  && rm -f kubectl

# Install Helm
RUN wget -q -O - ${HELM_URL} | tar zxf - \
  && mv linux-amd64/helm /usr/bin/ \
  && chmod +x /usr/bin/helm \
  && helm version --client

# Install kubeval
RUN mkdir -p $HELM_HOME/plugins \
  && helm plugin install https://github.com/instrumenta/helm-kubeval