Bitbucket Pipelines deployment to a Google Container Engine configuration

bitbucket-pipelines.yml

---
options:
  docker: true

pipelines:
  branches:
    master:
    - step:
        script:
        # Installing gcloud
        - curl -o /tmp/google-cloud-sdk.tar.gz https://dl.google.com/dl/cloudsdk/channels/rapid/downloads/google-cloud-sdk-161.0.0-linux-x86_64.tar.gz
        - tar -xvf /tmp/google-cloud-sdk.tar.gz -C /tmp/
        - /tmp/google-cloud-sdk/install.sh -q
        - source /tmp/google-cloud-sdk/path.bash.inc
        # Installing kubectl
        - gcloud components install kubectl -q
        # Authentication
        - echo $GCLOUD_API_KEYFILE | base64 --decode --ignore-garbage > ./gcloud-api-key.json
        - gcloud auth activate-service-account --key-file gcloud-api-key.json
        - gcloud config set project $GCLOUD_PROJECT
        - gcloud container clusters get-credentials $GCLOUD_CLUSTER --zone=$GCLOUD_ZONE
        # Building images
        - docker build . -t us.gcr.io/$GCLOUD_PROJECT/$PROJECT_NAME:$BITBUCKET_COMMIT
        # Pushing SHA1 image
        - gcloud docker -- push us.gcr.io/$GCLOUD_PROJECT/$PROJECT_NAME:$BITBUCKET_COMMIT
        # Pushing latest image
        - docker tag us.gcr.io/$GCLOUD_PROJECT/$PROJECT_NAME:$BITBUCKET_COMMIT us.gcr.io/$GCLOUD_PROJECT/$PROJECT_NAME:latest
        - gcloud docker -- push us.gcr.io/$GCLOUD_PROJECT/$PROJECT_NAME:latest
        # Deploy the image
        - kubectl set image deployment <deployment-name> <container-name>=us.gcr.io/$GCLOUD_PROJECT/$PROJECT_NAME:$BITBUCKET_COMMIT --record --namespace=<namespace>