Automatically generate bash completions for kubectl

hack/verify-gendocs.sh

@@ -22,7 +22,7 @@ KUBE_ROOT=$(dirname "${BASH_SOURCE}")/..
 source "${KUBE_ROOT}/hack/lib/init.sh"
 
 kube::golang::setup_env
-"${KUBE_ROOT}/hack/build-go.sh" cmd/gendocs cmd/genman
+"${KUBE_ROOT}/hack/build-go.sh" cmd/gendocs cmd/genman cmd/genbashcomp
 
 # Get the absolute path of the directory component of a file, i.e. the
 # absolute path of the dirname of $1.
@@ -81,12 +81,19 @@ locations=(
 )
 genman=$( (ls -t "${locations[@]}" 2>/dev/null || true) | head -1 )
 
-if [[ ! -x "$gendocs" || ! -x "$genman" ]]; then
+locations=(
+  "${KUBE_ROOT}/_output/dockerized/bin/${host_os}/${host_arch}/genbashcomp"
+  "${KUBE_ROOT}/_output/local/bin/${host_os}/${host_arch}/genbashcomp"
+  "${KUBE_ROOT}/platforms/${host_os}/${host_arch}/genbashcomp"
+)
+genbashcomp=$( (ls -t "${locations[@]}" 2>/dev/null || true) | head -1 )
+
+if [[ ! -x "$gendocs" || ! -x "$genman" || ! -x "$genbashcomp" ]]; then
   {
-    echo "It looks as if you don't have a compiled gendocs or genman binary"
+    echo "It looks as if you don't have a compiled gendocs, genman, or genbashcomp binary"
     echo
     echo "If you are running from a clone of the git repo, please run"
-    echo "'./hack/build-go.sh cmd/gendocs cmd/genman'."
+    echo "'./hack/build-go.sh cmd/gendocs cmd/genman cmd/genbashcomp'."
   } >&2
   exit 1
 fi
@@ -109,3 +116,20 @@ else
 	echo "${DOCROOT} is out of date. Please run hack/run-gendocs.sh"
 	exit 1
 fi
+
+COMPROOT="${KUBE_ROOT}/contrib/completions"
+TMP_COMPROOT="${KUBE_ROOT}/contrib/completions_tmp"
+cp -a "${COMPROOT}" "${TMP_COMPROOT}"
+${genbashcomp} "${TMP_COMPROOT}/bash/"
+set +e
+diff -Naupr "${COMPROOT}" "${TMP_COMPROOT}"
+ret=$?
+set -e
+rm -rf ${TMP_COMPROOT}
+if [ $ret -eq 0 ]
+then
+	echo "${COMPROOT} up to date."
+else
+	echo "${COMPROOT} is out of date. Please run hack/run-gendocs.sh"
+	exit 1
+fi