Install gsutil if not already in PATH.

Also, some minor readability whitespace changes.

hack/jenkins/common.sh

@@ -23,9 +23,19 @@
 # EXTRA_BUILD_ARGS: additional flags to pass into minikube start
 # JOB_NAME: the name of the logfile and check name to update on github
 
-
-# Copy only the files we need to this workspace
 mkdir -p out/ testdata/
+
+# Install gsutil if necessary.
+if ! type -P gsutil; then
+  if [[ ! -x "out/gsutil/gsutil" ]]; then
+    echo "Installing gsutil to $(pwd)/out ..."
+    curl -s https://storage.googleapis.com/pub/gsutil.tar.gz | tar -C out/ -zxf -
+  fi
+  export PATH="$(pwd)/out/gsutil:$PATH"
+fi
+
+# Add the out/ directory to the PATH, for using new drivers.
+export PATH="$(pwd)/out/":$PATH
 gsutil cp gs://minikube-builds/${MINIKUBE_LOCATION}/minikube-${OS_ARCH} out/
 gsutil cp gs://minikube-builds/${MINIKUBE_LOCATION}/docker-machine-driver-* out/
 gsutil cp gs://minikube-builds/${MINIKUBE_LOCATION}/e2e-${OS_ARCH} out/
@@ -48,8 +58,6 @@ export MINIKUBE_WANTREPORTERRORPROMPT=False
 sudo ./out/minikube-${OS_ARCH} delete || true
 ./out/minikube-${OS_ARCH} delete || true
 
-# Add the out/ directory to the PATH, for using new drivers.
-export PATH="$(pwd)/out/":$PATH
 
 # Linux cleanup
 virsh -c qemu:///system list --all \
@@ -90,7 +98,10 @@ find ~/.minikube || true
 
 # Allow this to fail, we'll switch on the return code below.
 set +e
-${SUDO_PREFIX}out/e2e-${OS_ARCH} -minikube-start-args="--vm-driver=${VM_DRIVER} ${EXTRA_START_ARGS}" -minikube-args="--v=10 --logtostderr ${EXTRA_ARGS}" -test.v -test.timeout=30m -binary=out/minikube-${OS_ARCH}
+${SUDO_PREFIX}out/e2e-${OS_ARCH} \
+  -minikube-start-args="--vm-driver=${VM_DRIVER} ${EXTRA_START_ARGS}" \
+  -minikube-args="--v=10 --logtostderr ${EXTRA_ARGS}" \
+  -test.v -test.timeout=30m -binary=out/minikube-${OS_ARCH}
 result=$?
 set -e