Use dependency cache in all Gradle tasks in GCB (#481)

* Use dependency cache in all Gradle tasks in GCB

Make the initial test and the final publishing steps use the shared
dependency cache.

Also make the initial test use the registry's own maven repo instead
of Maven Central.

release/build_nomulus_for_env.sh

@@ -34,6 +34,7 @@ gcs_prefix="storage.googleapis.com/domain-registry-maven-repository"
 # task. (See ./cloudbuild-nomulus.yaml, which calls this script in several
 # steps). If left at their default location, the caches will be lost after
 # each step.
+# Note: must be consistent with value in ./cloudbuild-nomulus.yaml
 export GRADLE_USER_HOME="./cloudbuild-caches"
 
 if [ "${environment}" == tool ]

release/cloudbuild-nomulus.yaml

@@ -21,7 +21,15 @@ steps:
   args: ['mkdir', 'nomulus']
 # Run tests
 - name: 'gcr.io/${PROJECT_ID}/builder:latest'
-  args: ['./gradlew', 'test', '-PskipDockerIncompatibleTests=true']
+  # Set home for Gradle caches. Must be consistent with last step below
+  # and ./build_nomulus_for_env.sh
+  env: [ 'GRADLE_USER_HOME=./cloudbuild-caches' ]
+  args: ['./gradlew',
+         'test',
+         '-PskipDockerIncompatibleTests=true',
+         '-PmavenUrl=https://storage.googleapis.com/domain-registry-maven-repository/maven',
+         '-PpluginsUrl=https://storage.googleapis.com/domain-registry-maven-repository/plugins'
+        ]
 # Build the tool binary and image.
 - name: 'gcr.io/${PROJECT_ID}/builder:latest'
   args: ['release/build_nomulus_for_env.sh', 'tool', 'output']
@@ -70,6 +78,9 @@ steps:
 # server/schema compatibility tests.
 - name: 'gcr.io/${PROJECT_ID}/builder:latest'
   entrypoint: /bin/bash
+  # Set home for Gradle caches. Must be consistent with second step above
+  # and ./build_nomulus_for_env.sh
+  env: [ 'GRADLE_USER_HOME=./cloudbuild-caches' ]
   args:
   - -c
   - |