update-istio.yaml

# https://help.github.com/en/categories/automating-your-workflow-with-github-actions

name: "Update istio"

on: # yamllint disable-line rule:truthy
  schedule:
    - cron: "0 8 */1 * *"
  push:
    branches:
      - "main"

jobs:
  check-istio:

    runs-on: "ubuntu-latest"

    steps:
      - name: "Git checkout"
        uses: "actions/checkout@v2"
        with:
          fetch-depth: 2
        env:
          GIT_COMMITTER_NAME: "GitHub Actions Shell"
          GIT_AUTHOR_NAME: "GitHub Actions Shell"
          EMAIL: "github-actions[bot]@users.noreply.github.com"

      - name: "Setup Helm"
        uses: "./.github/actions/helm"

      - name: "Check for updates"
        id: "check"
        run: |
          curl -sL https://istio.io/downloadIstio | sh -
          ISTIO_DIR=$(find . -name 'istio-*' -type d -maxdepth 1 -print | head -n1)
          ISTIO_VER=${ISTIO_DIR##./istio-}

          echo "Build manifests for ${ISTIO_VER} in dir ${ISTIO_DIR}"
          helm template ${ISTIO_DIR}/manifests/charts/istio-operator/ \
          --set hub=docker.io/istio \
          --set tag=${ISTIO_VER} \
          --set enableCRDTemplates=true \
          --set operatorNamespace=istio-operator \
          --set istioNamespace=istio-system  > ./cluster/istio/operator/manifests.yaml

          rm -rf ${ISTIO_DIR}

          if [[ $(git diff --stat) != '' ]]; then
          echo ::set-output name=version::${ISTIO_VER}
          fi

      - name: "Create Pull Request"
        uses: peter-evans/create-pull-request@v4
        if: "steps.check.outputs.version"
        with:
          commit-message: "feat: update Istio to ${{ steps.check.outputs.version }}"
          title: "feat: update Istio to ${{ steps.check.outputs.version }}"
          body: |
            Istio operator v${{ steps.check.outputs.version }}
          branch: "update-istio"