Google Cloud build conditional step

Question

I have the following cloudbuild.yaml file:

substitutions:
    _CLOUDSDK_COMPUTE_ZONE: us-central1-a 
    _CLOUDSDK_CONTAINER_CLUSTER: $_CLOUDSDK_CONTAINER_CLUSTER
steps:
- name: gcr.io/$PROJECT_ID/sonar-scanner:latest
  args:
    - '-Dsonar.host.url=https://sonar.test.io'
    - '-Dsonar.login=XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX'
    - '-Dsonar.projectKey=test-service'
    - '-Dsonar.sources=.'
- id: 'build test-service image'
  name: 'gcr.io/cloud-builders/docker'
  args: ['build', '-t', 'gcr.io/$PROJECT_ID/$REPO_NAME/$BRANCH_NAME:$SHORT_SHA', '.']
- id: 'push test-service image'
  name: 'gcr.io/cloud-builders/docker'
  args: ['push', 'gcr.io/$PROJECT_ID/$REPO_NAME/$BRANCH_NAME:$SHORT_SHA']
- id: 'set test-service image in yamls'
  name: 'ubuntu'
  args: ['bash','-c','sed -i "s,TEST_SERVICE,gcr.io/$PROJECT_ID/$REPO_NAME/$BRANCH_NAME:$SHORT_SHA," k8s/*.yaml']
- id: kubectl-apply
  name: 'gcr.io/cloud-builders/kubectl'
  args: ['apply', '-f', 'k8s/']
  env:
  - 'CLOUDSDK_COMPUTE_ZONE=${_CLOUDSDK_COMPUTE_ZONE}'
  - 'CLOUDSDK_CONTAINER_CLUSTER=${_CLOUDSDK_CONTAINER_CLUSTER}'
images: ['gcr.io/$PROJECT_ID/$REPO_NAME/$BRANCH_NAME:$SHORT_SHA']

I would like to make the sonar-scanner step conditional (if we are on the production branch, I want to skip the sonar step; other branches should run that step). I would also like to use the same cloudbuild.yaml across all branches.

Is it possible to do this?

Answer 1

You have 2 solutions

1. Make 2 triggers, each one with their own configuration. 1 on Prod, 1 on UAT/DEV.
2. You can script your execution. It's dirty but you keep only 1 CI/CD config file

steps:
- name: gcr.io/$PROJECT_ID/sonar-scanner:latest
  entrypoint: 'bash'
  env:
  - 'BRANCH_NAME=$BRANCH_NAME'
  script: |
    #!/usr/bin/env bash
    if [ $BRANCH_NAME != 'prod' ]; then
      sonar-scanner \
        -Dsonar.host.url=https://sonar.test.io \
        -Dsonar.projectKey=test-service \
        -Dsonar.sources=.
    fi