1 files changed, 31 insertions, 0 deletions

diff --git a/packages/turbo-codemod/src/commands/migrate/steps/getLatestVersion.ts b/packages/turbo-codemod/src/commands/migrate/steps/getLatestVersion.ts
new file mode 100644
index 0000000..a6ab7e6
--- /dev/null
+++ b/packages/turbo-codemod/src/commands/migrate/steps/getLatestVersion.ts
@@ -0,0 +1,31 @@
+import axios from "axios";
+
+import type { MigrateCommandOptions } from "../types";
+
+const REGISTRY = "https://registry.npmjs.org";
+
+async function getPackageDetails({ packageName }: { packageName: string }) {
+  try {
+    const result = await axios.get(`${REGISTRY}/${packageName}`);
+    return result.data;
+  } catch (err) {
+    throw new Error(`Unable to fetch the latest version of ${packageName}`);
+  }
+}
+
+export default async function getLatestVersion({
+  to,
+}: MigrateCommandOptions): Promise<string | undefined> {
+  const packageDetails = await getPackageDetails({ packageName: "turbo" });
+  const { "dist-tags": tags, versions } = packageDetails;
+
+  if (to) {
+    if (tags[to] || versions[to]) {
+      return to;
+    } else {
+      throw new Error(`turbo@${to} does not exist`);
+    }
+  }
+
+  return tags.latest as string;
+}