Organize Main Function to Separate File

src/index.ts

@@ -1,37 +1,4 @@
-import * as cache from "@actions/cache";
 import * as core from "@actions/core";
-import { getCacheKey, getCachePaths } from "./cache.js";
-import { enableYarn, yarnInstall } from "./yarn/index.js";
-
-async function main(): Promise<void> {
-  await core.group("Enabling Yarn", async () => {
-    await enableYarn();
-  });
-
-  const cacheKey = await core.group("Getting cache key", getCacheKey);
-  const cachePaths = await core.group("Getting cache paths", getCachePaths);
-
-  const cacheFound = await core.group("Restoring cache", async () => {
-    const cacheId = await cache.restoreCache(cachePaths.slice(), cacheKey);
-    if (cacheId === undefined) {
-      core.warning("Cache not found");
-      return false;
-    }
-    return true;
-  });
-
-  if (cacheFound) {
-    core.info("Cache restored successfully");
-    return;
-  }
-
-  await core.group("Installing dependencies", async () => {
-    return yarnInstall();
-  });
-
-  await core.group("Saving cache", async () => {
-    return cache.saveCache(cachePaths.slice(), cacheKey);
-  });
-}
+import { main } from "./main.js";
 
 main().catch((err) => core.setFailed(err));

src/main.ts

@@ -0,0 +1,35 @@
+import * as cache from "@actions/cache";
+import * as core from "@actions/core";
+import { getCacheKey, getCachePaths } from "./cache.js";
+import { enableYarn, yarnInstall } from "./yarn/index.js";
+
+export async function main(): Promise<void> {
+  await core.group("Enabling Yarn", async () => {
+    await enableYarn();
+  });
+
+  const cacheKey = await core.group("Getting cache key", getCacheKey);
+  const cachePaths = await core.group("Getting cache paths", getCachePaths);
+
+  const cacheFound = await core.group("Restoring cache", async () => {
+    const cacheId = await cache.restoreCache(cachePaths.slice(), cacheKey);
+    if (cacheId === undefined) {
+      core.warning("Cache not found");
+      return false;
+    }
+    return true;
+  });
+
+  if (cacheFound) {
+    core.info("Cache restored successfully");
+    return;
+  }
+
+  await core.group("Installing dependencies", async () => {
+    return yarnInstall();
+  });
+
+  await core.group("Saving cache", async () => {
+    return cache.saveCache(cachePaths.slice(), cacheKey);
+  });
+}