Massive refactor (#165)

src/utilities/trafficSplitUtils.ts

@@ -0,0 +1,18 @@
+import { Kubectl } from "../types/kubectl";
+
+const trafficSplitAPIVersionPrefix = "split.smi-spec.io";
+
+export async function getTrafficSplitAPIVersion(
+  kubectl: Kubectl
+): Promise<string> {
+  const result = await kubectl.executeCommand("api-versions");
+  const trafficSplitAPIVersion = result.stdout
+    .split("\n")
+    .find((version) => version.startsWith(trafficSplitAPIVersionPrefix));
+
+  if (!trafficSplitAPIVersion) {
+    throw new Error("Unable to find traffic split api version");
+  }
+
+  return trafficSplitAPIVersion;
+}