Init action

Dockerfile

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+FROM stefanprodan/alpine-base:latest
+
+RUN apk --no-cache add git
+
+COPY src/entrypoint.sh /entrypoint.sh
+RUN chmod +x /entrypoint.sh
+
+ENTRYPOINT ["/entrypoint.sh"]

action.yml

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+name: 'helm-gh-pages'
+description: 'A GitHub Action for publishing Helm charts with Github Pages'
+author: 'Stefan Prodan'
+branding:
+  icon: 'command'
+  color: 'blue'
+inputs:
+  token:
+    description: "GitHub token"
+    required: true
+  charts_dir:
+    description: "The charts directory, defaults to `charts`"
+    required: false
+  charts_url:
+    description: "The GitHub Pages URL, defaults to `https://<USER>.github.io/<REPOSITORY>`"
+    required: false
+  owner:
+    description: "The GitHub user or org that owns this repository, defaults to GITHUB_REPOSITORY"
+    required: false
+  repository:
+    description: "The GitHub repository name, defaults to GITHUB_REPOSITORY"
+    required: false
+  branch:
+    description: "The branch to publish charts, defaults to `gh-pages`"
+    required: false
+  helm_version:
+    description: "The Helm CLI version"
+    required: false
+runs:
+  using: 'docker'
+  image: 'Dockerfile'
+  args:
+    - ${{ inputs.token }}
+    - ${{ inputs.charts_dir }}
+    - ${{ inputs.charts_url }}
+    - ${{ inputs.user }}
+    - ${{ inputs.repository }}
+    - ${{ inputs.branch }}
+    - ${{ inputs.helm_version }}

src/entrypoint.sh

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+#!/usr/bin/env bash
+
+set -o errexit
+set -o pipefail
+
+GITHUB_TOKEN=$1
+CHARTS_DIR=$2
+CHARTS_URL=$3
+OWNER=$4
+REPOSITORY=$5
+BRANCH=$6
+HELM_VERSION=$7
+
+CHARTS_TMP_DIR=$(mktemp -d)
+REPO_ROOT=$(git rev-parse --show-toplevel)
+REPO_URL=""
+
+main() {
+  if [[ -z "$HELM_VERSION" ]]; then
+      HELM_VERSION="3.2.1"
+  fi
+
+  if [[ -z "$CHARTS_DIR" ]]; then
+      CHARTS_DIR="charts"
+  fi
+
+  if [[ -z "$OWNER" ]]; then
+      OWNER=$(cut -d '/' -f 1 <<< "$GITHUB_REPOSITORY")
+  fi
+
+  if [[ -z "$REPOSITORY" ]]; then
+      REPOSITORY=$(cut -d '/' -f 2 <<< "$GITHUB_REPOSITORY")
+  fi
+
+  if [[ -z "$BRANCH" ]]; then
+      BRANCH="gh-pages"
+  fi
+
+  if [[ -z "$CHARTS_URL" ]]; then
+      CHARTS_URL="https://${OWNER}.github.io/${REPOSITORY}"
+  fi
+
+  if [[ -z "$REPO_URL" ]]; then
+      REPO_URL="https://x-access-token:${GITHUB_TOKEN}@github.com/${OWNER}/${REPOSITORY}"
+  fi
+
+  download
+  lint
+  package
+  upload
+}
+
+download() {
+  tmpDir=$(mktemp -d)
+
+  pushd $tmpDir >& /dev/null
+
+  curl -sSL https://get.helm.sh/helm-v${HELM_VERSION}-linux-amd64.tar.gz | tar xz
+  cp linux-amd64/helm /usr/local/bin/helm
+
+  popd >& /dev/null
+  rm -rf $tmpDir
+}
+
+lint() {
+  helm lint ${REPO_ROOT}/${CHARTS_DIR}/*
+}
+
+package() {
+  helm package ${REPO_ROOT}/${CHARTS_DIR}/* --destination ${CHARTS_TMP_DIR}
+}
+
+upload() {
+  tmpDir=$(mktemp -d)
+  pushd $tmpDir >& /dev/null
+
+  git clone ${REPO_URL}
+  cd ${REPOSITORY}
+  git config user.name "${GITHUB_ACTOR}"
+  git config user.email "${GITHUB_ACTOR}@users.noreply.github.com"
+  git remote set-url origin ${REPO_URL}
+  git checkout gh-pages
+
+  charts=$(cd ${CHARTS_TMP_DIR} && ls *.tgz | xarg)
+
+  mv -f ${CHARTS_TMP_DIR}/*.tgz .
+  helm repo index . --url ${CHARTS_URL}
+
+  git add .
+  git commit -m "Publish $charts"
+  git push origin gh-pages
+
+  popd >& /dev/null
+  rm -rf $tmpDir
+}
+
+main