fix some shellcheck failures of cluster/*.sh

cluster/clientbin.sh

@@ -18,7 +18,7 @@ set -o errexit
 set -o nounset
 set -o pipefail
 
-KUBE_ROOT=${KUBE_ROOT:-$(dirname "${BASH_SOURCE}")/..}
+KUBE_ROOT=${KUBE_ROOT:-$(dirname "${BASH_SOURCE[0]}")/..}
 
 # Detect the OS name/arch so that we can find our binary
 case "$(uname -s)" in

cluster/common.sh

@@ -20,7 +20,7 @@ set -o errexit
 set -o nounset
 set -o pipefail
 
-KUBE_ROOT=$(cd $(dirname "${BASH_SOURCE}")/.. && pwd)
+KUBE_ROOT=$(cd $(dirname "${BASH_SOURCE[0]}")/.. && pwd)
 
 DEFAULT_KUBECONFIG="${HOME:-.}/.kube/config"
 

cluster/log-dump/log-dump.sh

@@ -63,7 +63,7 @@ readonly max_dump_processes=25
 
 # TODO: Get rid of all the sourcing of bash dependencies eventually.
 function setup() {
-  KUBE_ROOT=$(dirname "${BASH_SOURCE}")/../..
+  KUBE_ROOT=$(dirname "${BASH_SOURCE[0]}")/../..
   if [[ -z "${use_custom_instance_list}" ]]; then
     : ${KUBE_CONFIG_FILE:="config-test.sh"}
     echo "Sourcing kube-util.sh"

cluster/pre-existing/util.sh

@@ -18,7 +18,7 @@
 # pre-existing Kubernetes master. See test/kubemark/pre-existing/README.md
 # for me details on using a pre-existing provider.
 
-KUBE_ROOT=$(dirname "${BASH_SOURCE}")/../..
+KUBE_ROOT=$(dirname "${BASH_SOURCE[0]}")/../..
 
 source "${KUBE_ROOT}/cluster/common.sh"
 source "${KUBE_ROOT}/hack/lib/util.sh"

cluster/test-e2e.sh

@@ -21,7 +21,7 @@ set -o errexit
 set -o nounset
 set -o pipefail
 
-KUBE_ROOT=$(dirname "${BASH_SOURCE}")/..
+KUBE_ROOT=$(dirname "${BASH_SOURCE[0]}")/..
 source "${KUBE_ROOT}/cluster/kube-util.sh"
 
 echo "Testing cluster with provider: ${KUBERNETES_PROVIDER}" 1>&2

cluster/test-network.sh

@@ -24,7 +24,7 @@ set -o errexit
 set -o nounset
 set -o pipefail
 
-KUBE_ROOT=$(dirname "${BASH_SOURCE}")/..
+KUBE_ROOT=$(dirname "${BASH_SOURCE[0]}")/..
 KUBE_CONFIG_FILE="config-default.sh"
 
 ${KUBE_ROOT}/hack/ginkgo-e2e.sh --ginkgo.focus=Networking

cluster/test-smoke.sh

@@ -23,7 +23,7 @@ set -o errexit
 set -o nounset
 set -o pipefail
 
-KUBE_ROOT=$(dirname "${BASH_SOURCE}")/..
+KUBE_ROOT=$(dirname "${BASH_SOURCE[0]}")/..
 
 TEST_ARGS="$@"
 

cluster/validate-cluster.sh

@@ -24,7 +24,7 @@ set -o errexit
 set -o nounset
 set -o pipefail
 
-KUBE_ROOT=$(dirname "${BASH_SOURCE}")/..
+KUBE_ROOT=$(dirname "${BASH_SOURCE[0]}")/..
 
 if [ -f "${KUBE_ROOT}/cluster/env.sh" ]; then
   source "${KUBE_ROOT}/cluster/env.sh"