test: refactor cluster creation to a shell script

Signed-off-by: Xe Iaso <me@xeiaso.net>

test/k3k/create-cluster.sh

@@ -0,0 +1,49 @@
+#!/usr/bin/env bash
+# Create a k3k cluster, wait for it to be Ready, and write its kubeconfig.
+# Prints the generated cluster name to stdout on success.
+#
+# Required env:
+#   NAMESPACE       Kubernetes namespace to create the cluster in
+#   KUBECONFIG_OUT  Path to write the resulting kubeconfig
+#
+# Optional env (set under Tekton to enable ownerReference-based GC + labels):
+#   PIPELINE_NAME       Tekton Pipeline name
+#   PIPELINERUN_NAME    Tekton PipelineRun name
+#   PIPELINERUN_UID     Tekton PipelineRun UID
+
+set -euo pipefail
+
+: "${NAMESPACE:?NAMESPACE must be set}"
+: "${KUBECONFIG_OUT:?KUBECONFIG_OUT must be set}"
+
+script_dir=$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" && pwd)
+
+cluster_name=$(kubectl create -n "${NAMESPACE}" -f "${script_dir}/test-cluster.yaml" -ojson | jq -r '.metadata.name')
+
+if [[ -n "${PIPELINERUN_NAME:-}" && -n "${PIPELINERUN_UID:-}" ]]; then
+  owner_ref=$(jo \
+    apiVersion=tekton.dev/v1 \
+    kind=PipelineRun \
+    name="${PIPELINERUN_NAME}" \
+    uid="${PIPELINERUN_UID}" \
+    blockOwnerDeletion=false)
+  patch=$(jo metadata=$(jo "ownerReferences[]=${owner_ref}"))
+
+  kubectl patch -n "${NAMESPACE}" "clusters.k3k.io/${cluster_name}" --type=merge -p "${patch}" >&2
+
+  kubectl label -n "${NAMESPACE}" "clusters.k3k.io/${cluster_name}" \
+    "tekton.dev/memberOf=tasks" \
+    "tekton.dev/pipeline=${PIPELINE_NAME:-}" \
+    "tekton.dev/pipelineRun=${PIPELINERUN_NAME}" \
+    "tekton.dev/pipelineRunUID=${PIPELINERUN_UID}" >&2
+fi
+
+kubectl wait --for=condition=Ready "clusters.k3k.io/${cluster_name}" -n "${NAMESPACE}" --timeout 5m >&2
+kubectl wait --for=create "secret/k3k-${cluster_name}-kubeconfig" -n "${NAMESPACE}" --timeout 5m >&2
+
+mkdir -p "$(dirname "${KUBECONFIG_OUT}")"
+kubectl get -ojson -n "${NAMESPACE}" "secret/k3k-${cluster_name}-kubeconfig" \
+  | jq -r '.data["kubeconfig.yaml"]' \
+  | base64 -d > "${KUBECONFIG_OUT}"
+
+echo "${cluster_name}"