Install toolchain files to location provided in KUBEBUILDER_ASSETS if set

Also use sudo only when necessary to create the location

Author: javanthropus

hack/toolchain.sh

@@ -2,7 +2,8 @@
 set -euo pipefail
 
 K8S_VERSION="${K8S_VERSION:="1.29.x"}"
-KUBEBUILDER_ASSETS="/usr/local/kubebuilder/bin"
+KUBEBUILDER_ASSETS="${KUBEBUILDER_ASSETS:-/usr/local/kubebuilder/bin}"
+
 
 main() {
     tools
@@ -32,8 +33,10 @@ tools() {
 }
 
 kubebuilder() {
-    sudo mkdir -p ${KUBEBUILDER_ASSETS}
-    sudo chown "${USER}" ${KUBEBUILDER_ASSETS}
+    if ! mkdir -p ${KUBEBUILDER_ASSETS}; then
+      sudo mkdir -p ${KUBEBUILDER_ASSETS}
+      sudo chown $(whoami) ${KUBEBUILDER_ASSETS}
+    fi
     arch=$(go env GOARCH)
     ln -sf "$(setup-envtest use -p path "${K8S_VERSION}" --arch="${arch}" --bin-dir="${KUBEBUILDER_ASSETS}")"/* ${KUBEBUILDER_ASSETS}
     find $KUBEBUILDER_ASSETS