# This workflow uses actions that are not certified by GitHub.
# They are provided by a third-party and are governed by
# separate terms of service, privacy policy, and support
# documentation.

### The OpenShift Starter workflow will:
# - Checkout your repository
# - Perform a Docker build
# - Push the built image to an image registry
# - Log in to your OpenShift cluster
# - Create an OpenShift app from the image and expose it to the internet.

### Before you begin:
# - Have write access to a container image registry such as quay.io or Dockerhub.
# - Have access to an OpenShift cluster.
#   - For instructions to get started with OpenShift see https://www.openshift.com/try
# - The project you wish to add this workflow to should have a Dockerfile.
#   - If you don't have a Dockerfile at the repository root, see the buildah-build step.
#   - Builds from scratch are also available, but require more configuration.

### To get the workflow running:
# 1. Add this workflow to your repository.
# 2. Edit the top-level 'env' section, which contains a list of environment variables that must be configured.
# 3. Create the secrets referenced in the 'env' section under your repository Settings.
# 4. Edit the 'branches' in the 'on' section to trigger the workflow on a push to your branch.
# 5. Commit and push your changes.

# For a more sophisticated example, see https://github.com/redhat-actions/spring-petclinic/blob/main/.github/workflows/petclinic-sample.yaml
# Also see our GitHub organization, https://github.com/redhat-actions/

name: OpenShift

# ⬇️  Modify the fields marked with ⬇️ to fit your project, and create any secrets that are referenced.
# https://docs.github.com/en/free-pro-team@latest/actions/reference/encrypted-secrets
env:
  # ⬇️ EDIT with your registry and registry path.
  REGISTRY: quay.io/<username>
  # ⬇️ EDIT with your registry username.
  REGISTRY_USER: <username>
  REGISTRY_PASSWORD: ${{ secrets.REGISTRY_PASSWORD }}

  # ⬇️ EDIT to log into your OpenShift cluster and set up the context.
  # See https://github.com/redhat-actions/oc-login#readme for how to retrieve these values.
  OPENSHIFT_SERVER: ${{ secrets.OPENSHIFT_SERVER }}
  OPENSHIFT_TOKEN: ${{ secrets.OPENSHIFT_TOKEN }}

  # ⬇️ EDIT with the port your application should be accessible on.
  APP_PORT: 8080

  # ⬇️ EDIT if you wish to set the kube context's namespace after login. Leave blank to use the default namespace.
  OPENSHIFT_NAMESPACE: ""

  # If you wish to manually provide the APP_NAME and TAG, set them here, otherwise they will be auto-detected.
  APP_NAME: ""
  TAG: ""

on:
  # https://docs.github.com/en/free-pro-team@latest/actions/reference/events-that-trigger-workflows
  push:
    # Edit to the branch(es) you want to build and deploy on each push.
    branches: [ $default-branch ]

jobs:
  openshift-ci-cd:
    name: Build and deploy to OpenShift
    runs-on: ubuntu-20.04

    steps:
    - uses: actions/checkout@v2

    - name: Determine app name
      if: env.APP_NAME == ''
      run: |
        echo "APP_NAME=$(basename $PWD)" | tee -a $GITHUB_ENV

    - name: Determine tag
      if: env.TAG == ''
      run: |
        echo "TAG=${GITHUB_SHA::7}" | tee -a $GITHUB_ENV

    # https://github.com/redhat-actions/buildah-build#readme
    - name: Build from Dockerfile
      uses: redhat-actions/buildah-build@v1
      with:
        image: ${{ env.APP_NAME }}
        tag: ${{ env.TAG }}
        # If you don't have a dockerfile, see:
        # https://github.com/redhat-actions/buildah-build#building-from-scratch
        # Otherwise, point this to your Dockerfile relative to the repository root.
        dockerfiles: |
          ./Dockerfile

    # https://github.com/redhat-actions/push-to-registry#readme
    - name: Push to registry
      id: push-to-registry
      uses: redhat-actions/push-to-registry@v1
      with:
        image: ${{ env.APP_NAME }}
        tag: ${{ env.TAG }}
        registry: ${{ env.REGISTRY }}
        username: ${{ env.REGISTRY_USER }}
        password: ${{ env.REGISTRY_PASSWORD }}

    # The path the image was pushed to is now stored in ${{ steps.push-to-registry.outputs.registry-path }}

    # oc-login works on all platforms, but oc must be installed first.
    # The GitHub Ubuntu runner already includes oc.
    # Otherwise, https://github.com/redhat-actions/oc-installer#readme is available.

    # https://github.com/redhat-actions/oc-login#readme
    - name: Log in to OpenShift
      uses: redhat-actions/oc-login@v1
      with:
        openshift_server_url: ${{ env.OPENSHIFT_SERVER }}
        openshift_token: ${{ env.OPENSHIFT_TOKEN }}
        insecure_skip_tls_verify: true
        namespace: ${{ env.OPENSHIFT_NAMESPACE }}

    # This step should create a deployment, service, and route to run your app and expose it to the internet.
    # Feel free to replace this with 'oc apply', 'helm install', or however you like to deploy your app.
    - name: Create and expose app
      run: |
        export IMAGE="${{ steps.push-to-registry.outputs.registry-path }}"
        export PORT=${{ env.APP_PORT }}

        export SELECTOR="app=${{ env.APP_NAME }}"
        echo "SELECTOR=$SELECTOR" >> $GITHUB_ENV

        set -x
        # Take down any old deployment
        oc delete all --selector="$SELECTOR"
        oc new-app --name $APP_NAME --docker-image="$IMAGE"

        # Make sure the app port is exposed
        oc patch svc $APP_NAME -p "{ \"spec\": { \"ports\": [{ \"name\": \"$PORT-tcp\", \"port\": $PORT }] } }"
        oc expose service $APP_NAME --port=$PORT

        oc get all --selector="$SELECTOR"
        set +x

        export ROUTE="$(oc get route $APP_NAME -o jsonpath='{.spec.host}')"
        echo "$APP_NAME is exposed at $ROUTE"
        echo "ROUTE=$ROUTE" >> $GITHUB_ENV

    - name: View application route
      run: |
        [[ -n ${{ env.ROUTE }} ]] || (echo "Determining application route failed in previous step"; exit 1)
        echo "======================== Your application is available at: ========================"
        echo ${{ env.ROUTE }}
        echo "==================================================================================="
        echo
        echo "Your app can be taken down with: \"oc delete all --selector='${{ env.SELECTOR }}'\""