ManualBuild should abort early on failure

manualBuild.sh

@@ -1,28 +1,26 @@
 source ./buildVersion.sh
 echo "Building tier/gte version ${VERSION_TAG}"
-docker build --pull --tag=tier/gte:base-${VERSION_TAG} base/ \
-#&& docker build --build-arg VERSION_TAG=${VERSION_TAG} --tag=tier/gte:full_demo-${VERSION_TAG} full-demo \
+docker build --pull --tag=tier/gte:base-${VERSION_TAG} base/
 
-pushd ex101
-./manualBuild.sh
-popd
-
-pushd ex201
-./manualBuild.sh
-popd
-
-# pushd ex211
-# ./manualBuild.sh
-# popd
-#
-# pushd ex301
-# ./manualBuild.sh
-# popd
+result=$?
+if [ "$result" -ne 0 ]; then
+    echo "Build in base exited with status $result"
+    exit $result
+fi
 
-pushd ex401
-./manualBuild.sh
-popd
+for lesson in ex101 ex201 ex401; do
+  pushd ex101
+  ./manualBuild.sh
+  result=$?
+  if [ "$result" -ne 0 ]; then
+      echo "Build in $lesson exited with status $result"
+      exit $result
+  fi
+  popd
+done
 
 if [[ "$OSTYPE" == "darwin"* ]]; then
   say full build complete
 fi
+
+exit $result