Refactor entire project (#39)

- Use more modern TypeScript conventions
- Use JavaScript Kubernetes Client
- Add unit tests
- Add integration tests
- Add TypeScript compile verify workflow
- Switch codeowners

src/kubeconfigs/arc.ts

@@ -0,0 +1,68 @@
+import * as core from "@actions/core";
+import * as io from "@actions/io";
+import { Method, parseMethod } from "../types/method";
+import * as path from "path";
+import { runAzCliCommand, runAzKubeconfigCommandBlocking } from "./azCommands";
+
+const RUNNER_TEMP: string = process.env["RUNNER_TEMP"] || "";
+export const KUBECONFIG_LOCATION: string = path.join(
+  RUNNER_TEMP,
+  `arc_kubeconfig_${Date.now()}`
+);
+
+/**
+ * Gets the kubeconfig based on provided method for an Arc Kubernetes cluster
+ * @returns The kubeconfig wrapped in a Promise
+ */
+export async function getArcKubeconfig(): Promise<string> {
+  const resourceGroupName = core.getInput("resource-group", { required: true });
+  const clusterName = core.getInput("cluster-name", { required: true });
+  const azPath = await io.which("az", true);
+
+  const method: Method | undefined = parseMethod(
+    core.getInput("method", { required: true })
+  );
+
+  await runAzCliCommand(azPath, ["extension", "add", "-n", "connectedk8s"]);
+
+  switch (method) {
+    case Method.SERVICE_ACCOUNT:
+      const saToken = core.getInput("token", { required: true });
+      return await runAzKubeconfigCommandBlocking(
+        azPath,
+        [
+          "connectedk8s",
+          "proxy",
+          "-n",
+          clusterName,
+          "-g",
+          resourceGroupName,
+          "--token",
+          saToken,
+          "-f",
+          KUBECONFIG_LOCATION,
+        ],
+        KUBECONFIG_LOCATION
+      );
+    case Method.SERVICE_PRINCIPAL:
+      return await runAzKubeconfigCommandBlocking(
+        azPath,
+        [
+          "connectedk8s",
+          "proxy",
+          "-n",
+          clusterName,
+          "-g",
+          resourceGroupName,
+          "-f",
+          KUBECONFIG_LOCATION,
+        ],
+        KUBECONFIG_LOCATION
+      );
+    case undefined:
+      core.warning("Defaulting to kubeconfig method");
+    case Method.KUBECONFIG:
+    default:
+      throw Error("Kubeconfig method not supported for Arc cluster");
+  }
+}