Move clearKubeconfigEnvVars to separate file (#2337)

Signed-off-by: Sebastian Malton <sebastian@malton.name>

src/main/utils/clear-kube-env-vars.ts

@@ -0,0 +1,16 @@
+const anyKubeconfig = /^kubeconfig$/i;
+
+/**
+ * This function deletes all keys of the form /^kubeconfig$/i, returning a new
+ * object.
+ *
+ * This is needed because `kubectl` checks for other version of kubeconfig
+ * before KUBECONFIG and we only set KUBECONFIG.
+ * @param env The current copy of env
+ */
+export function clearKubeconfigEnvVars(env: Record<string, any>): Record<string, any> {
+  return Object.fromEntries(
+    Object.entries(env)
+      .filter(([key]) => anyKubeconfig.exec(key) === null)
+  );
+}