hack/update-openapi-spec.sh: normalize indention of spec through jq

hack/lib/util.sh

@@ -339,10 +339,9 @@ kube::util::create-fake-git-tree() {
 kube::util::godep_restored() {
   local -r godeps_json=${1:-Godeps/Godeps.json}
   local -r gopath=${2:-${GOPATH%:*}}
-  if ! which jq &>/dev/null; then
-    echo "jq not found. Please install." 1>&2
-    return 1
-  fi
+
+  kube::util::require-jq
+
   local root
   local old_rev=""
   while read path rev; do
@@ -461,7 +460,7 @@ kube::util::base_ref() {
   fi
 
   full_branch="$(kube::util::git_upstream_remote_name)/${git_branch}"
-  
+
   # make sure the branch is valid, otherwise the check will pass erroneously.
   if ! git describe "${full_branch}" >/dev/null; then
     # abort!
@@ -479,7 +478,7 @@ kube::util::has_changes() {
   local -r git_branch=$1
   local -r pattern=$2
   local -r not_pattern=${3:-totallyimpossiblepattern}
-  
+
   local base_ref=$(kube::util::base_ref "${git_branch}")
   echo "Checking for '${pattern}' changes against '${base_ref}'"
 
@@ -792,6 +791,15 @@ function kube::util::check-file-in-alphabetical-order {
   fi
 }
 
+# kube::util::require-jq
+# Checks whether jq is installed.
+function kube::util::require-jq {
+  if ! which jq &>/dev/null; then
+    echo "jq not found. Please install." 1>&2
+    return 1
+  fi
+}
+
 # Some useful colors.
 if [[ -z "${color_start-}" ]]; then
   declare -r color_start="\033["

hack/update-openapi-spec.sh

@@ -25,6 +25,7 @@ KUBE_ROOT=$(dirname "${BASH_SOURCE}")/..
 OPENAPI_ROOT_DIR="${KUBE_ROOT}/api/openapi-spec"
 source "${KUBE_ROOT}/hack/lib/init.sh"
 
+kube::util::require-jq
 kube::golang::setup_env
 
 make -C "${KUBE_ROOT}" WHAT=cmd/kube-apiserver
@@ -83,7 +84,7 @@ fi
 
 kube::log::status "Updating " ${OPENAPI_ROOT_DIR}
 
-curl -w "\n" -fs "${API_HOST}:${API_PORT}/openapi/v2" > "${OPENAPI_ROOT_DIR}/swagger.json"
+curl -w "\n" -fs "${API_HOST}:${API_PORT}/openapi/v2" | jq -S . > "${OPENAPI_ROOT_DIR}/swagger.json"
 
 kube::log::status "SUCCESS"