scripts: declare ROOT closer to where it's used, and some DRY changes

This also prevents shellcheck from complaining about a possibly
undefined variable.

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

script/test/cri-integration.sh

@@ -14,10 +14,14 @@
 #   See the License for the specific language governing permissions and
 #   limitations under the License.
 
+set -o errexit
 set -o nounset
 set -o pipefail
 
-source "$(dirname "${BASH_SOURCE[0]}")/utils.sh"
+basedir="$(dirname "${BASH_SOURCE[0]}")"
+source "${basedir}/utils.sh"
+
+ROOT="$( cd "${basedir}" && pwd )"/../..
 cd "${ROOT}"
 
 # FOCUS focuses the test to run.

script/test/utils.sh

@@ -14,8 +14,6 @@
 #   See the License for the specific language governing permissions and
 #   limitations under the License.
 
-ROOT="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"/../..
-
 IS_WINDOWS=0
 if [ -v "OS" ] && [ "${OS}" == "Windows_NT" ]; then
   IS_WINDOWS=1

test/build-test-images.sh

@@ -27,6 +27,8 @@ set -o pipefail
 basedir="$(dirname "${BASH_SOURCE[0]}")"
 source "${basedir}/build-utils.sh"
 source "${basedir}/init-buildx.sh"
+
+ROOT="$( cd "$basedir" && pwd )"/..
 cd "${ROOT}"
 
 # ignore errors if the image already exists

test/build-utils.sh

@@ -14,10 +14,8 @@
 #   See the License for the specific language governing permissions and
 #   limitations under the License.
 
-ROOT="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"/..
-
 # PROJECT is the gce project to upload tarball.
-PROJECT=${PROJECT:-"k8s-cri-containerd"}
+: "${PROJECT:=k8s-cri-containerd}"
 
 # GOOGLE_APPLICATION_CREDENTIALS is the path of service account file.
 if [ -z "${GOOGLE_APPLICATION_CREDENTIALS:-""}" ]; then

test/build.sh

@@ -22,7 +22,10 @@ set -o errexit
 set -o nounset
 set -o pipefail
 
-source "$(dirname "${BASH_SOURCE[0]}")/build-utils.sh"
+basedir="$(dirname "${BASH_SOURCE[0]}")"
+source "${basedir}/build-utils.sh"
+
+ROOT="$( cd "${basedir}" && pwd )"/..
 cd "${ROOT}"
 
 # Make sure output directory is clean.