# This is a CICD workflow for demo
name: cicd-demo

# Controls when the action will run. Triggers the workflow on push or pull request
# events but only for the below branch and specific path
on:
  push:
    branches:
    - main
    - develop
    paths:
      - 'demo-app/**'
  pull_request:
    branches:
    - main
    paths:
      - 'demo-app/**'

jobs:
# The "build" job
  build:
    # The type of runner that the job will run on
    runs-on: ubuntu-latest
    outputs:
      image_tag: ${{ steps.build_app.outputs.image_tag }}
      actor: ${{ steps.build_app.outputs.actor }}
    # Steps represent a sequence of tasks that will be executed as part of the job
    steps:

    steps:
    # Checks-out your repository under $GITHUB_WORKSPACE
    - name: checkout repo
      uses: actions/checkout@v3

    - name: Setup go
      uses: actions/setup-go@v3
      with:
        go-version-file: 'demo-app/go.mod'
        check-latest: true
        cache: true
        cache-dependency-path: demo-app/go.sum

    - name: Login to GCR
      uses: docker/login-action@v2
      with:
        registry: asia.gcr.io
        username: _json_key
        password: ${{ secrets.GCR_JSON_KEY }}

    - name: build application
      id: build_app
      run: |-
        VER=`cat demo-app/Makefile| grep TAG= | awk -F "=" 'NR==1{print $2}'`
        GIT_COMMIT=$(git log | grep commit | awk 'NR==1{print $2}' | cut -c1-7) 
        cd helm-go-client
        make push TAG2=-$GIT_COMMIT
        # set output
        echo "::set-output name=image_tag::$(echo "$VER-$GIT_COMMIT")"
        echo "::set-output name=actor::$(echo "$GITHUB_ACTOR")"

export TAG=1.0.0
export DOCKERHUB=wadexu007/demo-app

hello:
	echo "This is Go client call helm sdk"

local: hello
	echo "run locally"
	go run main.go

build: hello
	echo "building docker container"
	docker build -t ${DOCKERHUB}:${TAG} .

push: build
	echo "pushing to my docker hub"
	docker push ${DOCKERHUB}:${TAG}

Makefile

    # Workaround to avoid Post Use step failures related to cache
    # Error: There are no cache folders on the disk
    - name: Post setup
      run: mkdir -p /home/runner/.cache/go-build
      continue-on-error: true

  deploy:
    # The type of runner that the job will run on
    runs-on: ubuntu-latest
    needs: build
    steps:    
    # Checks-out k8s YAML manifests repository 
    - name: checkout k8s manifests repo
      uses: actions/checkout@v3
      with:
        # clone //github.com/xxx/sre_manifests which contains deploy manifests
        repository: xxx/sre_manifests
        # auth by ssh key or personal toke 
        ssh-key: ${{ secrets.SSH_PRIVATE_KEY }}
        ref: refs/heads/master

    # Update image version
    - name: Update Kubernetes resources
      run: |
       cd demo-manifests/services/demo-app/dev 
       kustomize edit set image asia.gcr.io/sre-dev/demo-app:${{ needs.build.outputs.image_tag }}
       cat kustomization.yaml

      # authentication via credentials json
      - id: 'auth'
        uses: 'google-github-actions/auth@v0'
        with:
          credentials_json: '${{ secrets.GCR_JSON_KEY }}' # test key's json
      # Setup gcloud CLI
      - name: Set up Cloud SDK
        uses: google-github-actions/setup-gcloud@v0
      # Get the GKE credentials so we can deploy to the cluster
      - name: Set up GKE credentials
        run: |-
          gcloud container clusters get-credentials xxx_gke_cluster --region xxx_gke_region --project xxx_gcp_project
      # Deploy to the GKE cluster
      - name: Deploy
        run: |-
          gcloud container clusters list --project xxx_gcp_project
          cd demo-manifests/services/demo-app/dev
          cat kustomization.yaml
          kustomize build . | kubectl apply -f -
          kubectl rollout status deploy/demo-app -n demo