helm-publish.sh

#!/bin/sh
set -e
set -o pipefail

WORKING_DIRECTORY="$PWD"

[ "$GITHUB_PAGES_REPO" ] || {
  echo "ERROR: Environment variable GITHUB_PAGES_REPO is required"
  exit 1
}
[ -z "$GITHUB_PAGES_BRANCH" ] && GITHUB_PAGES_BRANCH=master
[ -z "$HELM_CHARTS_SOURCE" ] && HELM_CHARTS_SOURCE="$WORKING_DIRECTORY/charts"
[ -d "$HELM_CHARTS_SOURCE" ] || {
  echo "ERROR: Could not find Helm charts in $HELM_CHARTS_SOURCE"
  exit 1
}
[ -z "$HELM_VERSION" ] && HELM_VERSION=2.13.1
[ "$CIRCLE_BRANCH" ] || {
  echo "ERROR: Environment variable CIRCLE_BRANCH is required"
  exit 1
}

echo "GITHUB_PAGES_REPO=$GITHUB_PAGES_REPO"
echo "GITHUB_PAGES_BRANCH=$GITHUB_PAGES_BRANCH"
echo "HELM_CHARTS_SOURCE=$HELM_CHARTS_SOURCE"
echo "HELM_VERSION=$HELM_VERSION"
echo "CIRCLE_BRANCH=$CIRCLE_BRANCH"

echo '>> Prepare...'
mkdir -p /tmp/helm/bin
mkdir -p /tmp/helm/publish
apk update
apk add ca-certificates git openssh

echo '>> Installing Helm...'
cd /tmp/helm/bin
wget "https://storage.googleapis.com/kubernetes-helm/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 -c
helm init -c

echo ">> Checking out $GITHUB_PAGES_BRANCH branch from $GITHUB_PAGES_REPO"
cd /tmp/helm/publish
mkdir -p "$HOME/.ssh"
ssh-keyscan -H github.com >> "$HOME/.ssh/known_hosts"
git clone -b "$GITHUB_PAGES_BRANCH" "[email protected]:$GITHUB_PAGES_REPO.git" .

echo '>> Building charts...'
find "$HELM_CHARTS_SOURCE" -mindepth 1 -maxdepth 1 -type d | while read chart; do
  echo ">>> helm lint $chart"
  helm lint "$chart"
  chart_name="`basename "$chart"`"
  echo ">>> helm package -d $chart_name $chart"
  mkdir -p "$chart_name"
  helm package -d "$chart_name" "$chart"
done
echo '>>> helm repo index'
helm repo index .

if [ "$CIRCLE_BRANCH" != "master" ]; then
  echo "Current branch is not master and do not publish"
  exit 0
fi

echo ">> Publishing to $GITHUB_PAGES_BRANCH branch of $GITHUB_PAGES_REPO"
git config user.email "[email protected]"
git config user.name CircleCI
git add .
git status
git commit -m "Published by CircleCI $CIRCLE_BUILD_URL"
git push origin 
git push origin "$GITHUB_PAGES_BRANCH"