tests: General improvements to operator script

This PR gives general improvements to the operator script that is
being used in tests. This PR includes changes like better variable
definition and the use of a variable that has been already defined.

Signed-off-by: Gabriela Cervantes <gabriela.cervantes.tellez@intel.com>

tests/e2e/operator.sh

@@ -10,7 +10,7 @@ set -o nounset
 set -o pipefail
 
 script_dir="$(dirname "$(readlink -f "$0")")"
-project_dir="$(readlink -f ${script_dir}/../..)"
+project_dir="$(readlink -f "${script_dir}"/../..)"
 
 source "${script_dir}/lib.sh"
 
@@ -30,7 +30,8 @@ build_operator () {
 	# append the target to .gitconfig without checking the
 	# existence of the target,
 	# so it's better to check it before adding the target repo.
-	local sd="$(git config --global --get safe.directory ${project_dir} || true)"
+	local sd
+	sd="$(git config --global --get safe.directory "${project_dir}" || true)"
 	if [ "${sd}" == "" ]; then
 		echo "::debug:: Add repo ${project_dir} to git's safe.directory"
 		git config --global --add safe.directory "${project_dir}"
@@ -66,14 +67,15 @@ build_pre_install_img() {
 #
 handle_older_containerd() {
 	command -v containerd >/dev/null || return
-	local version=$(containerd -v | awk '{ print $3 }' | sed 's/^v//')
+	local version
+	version=$(containerd -v | awk '{ print $3 }' | sed 's/^v//')
 	echo "::debug:: system's containerd version: $version"
 	if [[ "$version" =~ ^1.6 || "$version" =~ ^1.5 ]]; then
 		echo "::warning:: Old system's containerd ($version). Configuring the operator to install a newer one"
 		pushd "$project_dir" >/dev/null
 		for kfile in $(find config/ -name "kustomization.yaml" \
 			-exec grep -l INSTALL_OFFICIAL_CONTAINERD {} \;);do
-			sed -i '/INSTALL_OFFICIAL_CONTAINERD/!b;n;s/false/true/;' $kfile
+			sed -i '/INSTALL_OFFICIAL_CONTAINERD/!b;n;s/false/true/;' "$kfile"
 		done
 		popd >/dev/null
 	fi
@@ -101,12 +103,13 @@ install_operator() {
 
 	# Wait the operator controller to be running.
 	local controller_pod="cc-operator-controller-manager"
-	local cmd="kubectl get pods -n "$op_ns" --no-headers |"
+	local cmd="kubectl get pods -n '$op_ns' --no-headers |"
 	cmd+="egrep -q ${controller_pod}.*'\<Running\>'"
 	if ! wait_for_process 120 10 "$cmd"; then
 		echo "::error:: ${controller_pod} pod is not running"
 
-		local pod_id="$(get_pods_regex $controller_pod $op_ns)"
+		local pod_id
+		pod_id="$(get_pods_regex '$controller_pod' '$op_ns')"
 		echo "::debug:: Pod $pod_id"
 		debug_pod "$pod_id" "$op_ns"
 
@@ -132,12 +135,12 @@ install_ccruntime() {
 	local pod=""
 	local cmd=""
 	for pod in cc-operator-daemon-install cc-operator-pre-install-daemon; do
-		cmd="kubectl get pods -n "$op_ns" --no-headers |"
+		cmd="kubectl get pods -n '$op_ns' --no-headers |"
 		cmd+="egrep -q ${pod}.*'\<Running\>'"
 		if ! wait_for_process 600 30 "$cmd"; then
 			echo "::error:: $pod pod is not running"
-
-			local pod_id="$(get_pods_regex $pod $op_ns)"
+			local pod_id
+			pod_id="$(get_pods_regex "$pod" "$op_ns")"
 			echo "::debug:: Pod $pod_id"
 			debug_pod "$pod_id" "$op_ns"
 
@@ -224,7 +227,7 @@ start_local_registry() {
 	local registry_container="local-registry"
 
 	if ! curl -s localhost:5000; then
-		docker start local-registry >/dev/null
+		docker start "$registry_container" >/dev/null
 		local cnt=0
 		while ! curl -s localhost:5000 -o $cnt -lt 5; do
 			sleep 1
@@ -247,8 +250,8 @@ uninstall_operator() {
 	cmd+="&& ! echo \$_OUT | grep -q -e cc-operator-controller-manager"
 	if ! wait_for_process 180 30 "$cmd"; then
 		echo "::error:: the controller manager is still running"
-
-		local pod_id="$(get_pods_regex $pod $op_ns)"
+		local pod_id
+		pod_id="$(get_pods_regex "$pod" "$op_ns")"
 		echo "::debug:: Pod $pod_id"
 		debug_pod "$pod_id" "$op_ns"
 
@@ -264,7 +267,8 @@ wait_for_stabilization() {
 	local count=0
 	while true; do
 		local change=0
-		local pod_info=$(kubectl get pods -n "$op_ns" -o=jsonpath='{range .items[*]}{.metadata.name}{" "}{range .status.containerStatuses[*]}{.name}{" "}{.restartCount}{"\n"}{end}{end}')
+		local pod_info
+		pod_info=$(kubectl get pods -n "$op_ns" -o=jsonpath='{range .items[*]}{.metadata.name}{" "}{range .status.containerStatuses[*]}{.name}{" "}{.restartCount}{"\n"}{end}{end}')
 
 		while read -r pod container restart_count; do
 			if [ "${restart_counts[$pod-$container]--1}" != "$restart_count" ]; then