rewrite it all

src/utils.ts

@@ -0,0 +1,29 @@
+import * as core from "@actions/core";
+import * as exec from "@actions/exec";
+
+export async function getCmdOutput(
+  cmd: string,
+  args: Array<string> = [],
+  options: exec.ExecOptions = {},
+): Promise<string> {
+  let stdout = "";
+  let stderr = "";
+  try {
+    await exec.exec(cmd, args, {
+      silent: true,
+      listeners: {
+        stdout(data) {
+          stdout += data.toString();
+        },
+        stderr(data) {
+          stderr += data.toString();
+        },
+      },
+      ...options,
+    });
+  } catch (e) {
+    core.error(stderr);
+    throw e;
+  }
+  return stdout;
+}