# Google Cloud Build script for Cloud Teleport
#
# This build script is used to build the open-source Cloud Teleport GitHub repository for every
# change pushed. The .m2 directory is cached across steps using a mounted volume and is saved to GCS
# for future runs.
#
# Manual Execution:
# Use the below command to invoke the build manually. Note the substitutions for BRANCH_NAME and
# REVISION_ID. These variables are normally populated when the build is executed via build triggers
# but will be empty during manual execution. Dummy branch and revisions can be passed during manual
# execution so the artifacts can be uploaded upon build completion.
#
# gcloud builds submit . \
#   --config=cloudbuild.yaml \
#   --substitutions=BRANCH_NAME="master",REVISION_ID="bd671f47ce9e95dce00d0c07aee08f46d65658e4"
#

steps:
###########################################################
# Step 1: Retrieve the cached .m2 directory from GCS
###########################################################
- name: 'gcr.io/cloud-builders/gsutil'
  args:
  - '-m'
  - 'rsync'
  - '-r'
  - 'gs://${_BUCKET}/cache/.m2'
  - '/cache/.m2'
  volumes:
  - path: '/cache/.m2'
    name: 'm2_cache'

###########################################################
# Step 2: Build, Test, and Verify
###########################################################
- name: 'gcr.io/cloud-builders/mvn'
  args:
  - 'clean'
  - 'verify'
  - '--batch-mode'
  volumes:
  - path: '/cache/.m2'
    name: 'm2_cache'
  env:
  - MAVEN_OPTS=-Dmaven.repo.local=/cache/.m2

###########################################################
# Step 3: Update cached .m2 directory on GCS with any
#         additional dependencies downloaded during the
#         build.
###########################################################
- name: 'gcr.io/cloud-builders/gsutil'
  args:
  - '-m'
  - 'rsync'
  - '-r'
  - '/cache/.m2'
  - 'gs://${_BUCKET}/cache/.m2/'
  volumes:
  - path: '/cache/.m2'
    name: 'm2_cache'

substitutions:
  # Default values
  _BUCKET: 'cloud-teleport-github_cloudbuild'

artifacts:
  # Upload the jars created during the build.
  objects:
    location: 'gs://${_BUCKET}/artifacts/$BRANCH_NAME/$REVISION_ID'
    paths: ['target/*.jar']

options:
  # Use higher CPU machines so the caching and build steps are faster.
  machineType: 'N1_HIGHCPU_32'