godep-save.sh: add sanity checks

hack/godep-save.sh

@@ -22,8 +22,14 @@ KUBE_ROOT=$(dirname "${BASH_SOURCE}")/..
 source "${KUBE_ROOT}/hack/lib/init.sh"
 source "${KUBE_ROOT}/hack/lib/util.sh"
 
+kube::util::ensure_single_dir_gopath
 kube::util::ensure_godep_version v79
 
+if [ -e "${KUBE_ROOT}/vendor" -o -e "${KUBE_ROOT}/Godeps" ]; then
+  echo "The directory vendor/ or Godeps/ exists. Remove them before running godep-save.sh" 1>&2
+  exit 1
+fi
+
 # Some things we want in godeps aren't code dependencies, so ./...
 # won't pick them up.
 REQUIRED_BINS=(
@@ -34,34 +40,27 @@ REQUIRED_BINS=(
 )
 
 pushd "${KUBE_ROOT}" > /dev/null
+  # sanity check that staging directories do not exist in GOPATH
+  error=0
+  for repo in $(ls ${KUBE_ROOT}/staging/src/k8s.io); do
+    if [ -e "${GOPATH}/src/k8s.io/${repo}" ]; then
+      echo "k8s.io/${repo} exists in GOPATH. Remove before running godep-save.sh." 1>&2
+      error=1
+    fi
+  done
+  if [ "${error}" = "1" ]; then
+    exit 1
+  fi
+
   GOPATH=${GOPATH}:${KUBE_ROOT}/staging godep save "${REQUIRED_BINS[@]}"
 
   # create a symlink in vendor directory pointing to the staging client. This
   # let other packages use the staging client as if it were vendored.
-  if [ ! -e "vendor/k8s.io/api" ]; then
-    ln -s ../../staging/src/k8s.io/api vendor/k8s.io/api
-  fi
-  if [ ! -e "vendor/k8s.io/client-go" ]; then
-    ln -s ../../staging/src/k8s.io/client-go vendor/k8s.io/client-go
-  fi
-  if [ ! -e "vendor/k8s.io/apiserver" ]; then
-    ln -s ../../staging/src/k8s.io/apiserver vendor/k8s.io/apiserver
-  fi
-  if [ ! -e "vendor/k8s.io/apimachinery" ]; then
-    ln -s ../../staging/src/k8s.io/apimachinery vendor/k8s.io/apimachinery
-  fi
-  if [ ! -e "vendor/k8s.io/kube-aggregator" ]; then
-    ln -s ../../staging/src/k8s.io/kube-aggregator vendor/k8s.io/kube-aggregator
-  fi
-  if [ ! -e "vendor/k8s.io/apiextensions-apiserver" ]; then
-    ln -s ../../staging/src/k8s.io/apiextensions-apiserver vendor/k8s.io/apiextensions-apiserver
-  fi
-  if [ ! -e "vendor/k8s.io/sample-apiserver" ]; then
-    ln -s ../../staging/src/k8s.io/sample-apiserver vendor/k8s.io/sample-apiserver
-  fi
-  if [ ! -e "vendor/k8s.io/metrics" ]; then
-    ln -s ../../staging/src/k8s.io/metrics vendor/k8s.io/metrics
-  fi
+  for repo in $(ls ${KUBE_ROOT}/staging/src/k8s.io); do
+   if [ ! -e "vendor/k8s.io/${repo}" ]; then
+     ln -s "../../staging/src/k8s.io/${repo}" "vendor/k8s.io/${repo}"
+   fi
+  done
 popd > /dev/null
 
 echo "Don't forget to run hack/update-godep-licenses.sh if you added or removed a dependency!"

hack/lib/util.sh

@@ -513,6 +513,14 @@ kube::util::ensure_godep_version() {
   godep version
 }
 
+# Checks that the GOPATH is simple, i.e. consists only of one directory, not multiple.
+kube::util::ensure_single_dir_gopath() {
+  if [[ "${GOPATH}" == *:* ]]; then
+    echo "GOPATH must consist of a single directory." 1>&2
+    exit 1
+  fi
+}
+
 # Checks whether there are any files matching pattern $2 changed between the
 # current branch and upstream branch named by $1.
 # Returns 1 (false) if there are no changes, 0 (true) if there are changes