Google Cloud Build PR deploy

cloudbuild-pr.yaml

steps:
# Build image and push to GCR
- name: 'gcr.io/cloud-builders/docker'
  id: Build
  args:
  - 'build'
  - '-t'
  - 'gcr.io/$PROJECT_ID/$_SERVICE_NAME:v$_PR_NUMBER'
  - '.'
# TODO: look into [images]
- name: 'gcr.io/cloud-builders/docker'
  id: Push
  args:
  - 'push'
  - 'gcr.io/$PROJECT_ID/$_SERVICE_NAME:v$_PR_NUMBER'

# Access the id_github file from Secret Manager
- name: gcr.io/cloud-builders/gcloud
  entrypoint: 'bash'
  args: [ '-c', 'gcloud secrets versions access latest --secret=github-ssh-key > /root/.ssh/id_github' ]
  volumes:
  - name: 'ssh'
    path: /root/.ssh

# Set up git with key and domain
- name: 'gcr.io/cloud-builders/git'
  entrypoint: 'bash'
  args:
  - '-c'
  - |
    chmod 600 /root/.ssh/id_github
    cat <<EOF >/root/.ssh/config
    Hostname github.com
    IdentityFile /root/.ssh/id_github
    EOF
    ssh-keyscan -t rsa github.com > /root/.ssh/known_hosts
  volumes:
  - name: 'ssh'
    path: /root/.ssh

# Edit Kustomize layer in config repo and push changes
- name: gcr.io/cloud-builders/git
  entrypoint: 'bash'
  args:
  - '-c'
  - |
    echo "Cloning repo ..."
    git clone --depth 1 git@github.com:mikesparr/gcp-cicd-demo-config
    echo "Updating image tag version ..."
    cd gcp-cicd-demo-config
    ls
    sed -i "s|newTag: .*|newTag: v$_PR_NUMBER|" demo-app/overlays/review/kustomization.yaml
    echo "Creating review app ..."
    cp templates/demo-app-review.yaml apps/
    echo "Pushing changes to git config repo ..."
    git config --global user.name mikesparr
    git config --global user.email msparr@gmail.com
    git add -A
    git commit -m "Updated with build ${BUILD_ID} from ${REPO_NAME} commit ${COMMIT_SHA}"
    git push origin master
  volumes:
  - name: 'ssh'
    path: /root/.ssh