Enforce formatting on buildkite (#293)

Author: vitarb

docker/buildkite/docker-compose.yaml

@@ -43,7 +43,7 @@ services:
     build:
       context: ../../
       dockerfile: ./docker/buildkite/Dockerfile
-    command: "./gradlew --no-daemon test"
+    command: /bin/sh -c "docker/buildkite/run-tests.sh"
     environment:
       - "USER=unittest"
       - "TEMPORAL_SERVICE_ADDRESS=temporal:7233"
@@ -57,7 +57,7 @@ services:
     build:
       context: ../../
       dockerfile: ./docker/buildkite/Dockerfile
-    command: "./gradlew --no-daemon test"
+    command: /bin/sh -c "docker/buildkite/run-tests.sh"
     environment:
       - "USER=unittest"
       - "USE_DOCKER_SERVICE=false"

docker/buildkite/run-tests.sh

@@ -0,0 +1,12 @@
+#!/usr/bin/env sh
+set -eou pipefail
+set -x
+
+./gradlew --no-daemon test
+
+if [ ! -z "$(git status --porcelain)" ]; then 
+	echo 'Some files were improperly formatted. Please run build locally and check in all changes.'
+	git status;
+	exit 1;
+fi
+