Makefile: use a specific template for mktemp files

[ upstream commit db3e015 ]

Before this patch, we would hit a controller-gen[1] bug when the
temporary file would be of the form tmp.0oXXXXXX.

This patch uses a custom mktemp template that will not trigger the bug.

[1]: kubernetes-sigs/controller-tools#734

Signed-off-by: Alexandre Perrin <alex@isovalent.com>
Signed-off-by: Jussi Maki <jussi@isovalent.com>
Signed-off-by: Yutaro Hayakawa <yutaro.hayakawa@isovalent.com>

Makefile

@@ -301,7 +301,7 @@ k8s-tests:
 ##@ API targets
 CRD_OPTIONS ?= "crd:crdVersions=v1"
 manifests: ## Generate K8s manifests e.g. CRD, RBAC etc.
-	$(eval TMPDIR := $(shell mktemp -d))
+	$(eval TMPDIR := $(shell mktemp -d -t cilium.tmpXXXXXXXX))
 	cd "./vendor/sigs.k8s.io/controller-tools/cmd/controller-gen" && \
 	$(QUIET)$(GO) run ./... $(CRD_OPTIONS) paths="$(PWD)/pkg/k8s/apis/cilium.io/v2;$(PWD)/pkg/k8s/apis/cilium.io/v2alpha1" output:crd:artifacts:config="$(TMPDIR)";
 	$(QUIET)$(GO) run ./tools/crdcheck "$(TMPDIR)"