Faster set-up when a cache hit occurs

Signed-off-by: Sora Morimoto <sora@morimoto.io>

Author: smorimoto

dist/index.js

@@ -25,6 +25,7 @@ import {
   repositoryAddAll,
   repositoryRemoveAll,
   setupOpam,
+  update,
 } from "./opam.js";
 import { retrieveOpamLocalPackages } from "./packages.js";
 import { setupCygwin } from "./windows.js";
@@ -69,12 +70,14 @@ export async function installer() {
     core.addPath(CYGWIN_ROOT_BIN);
   }
   await setupOpam();
-  await repositoryRemoveAll();
-  await repositoryAddAll(OPAM_REPOSITORIES);
-  const ocamlCompiler = await RESOLVED_COMPILER;
   if (!opamCacheHit) {
+    await repositoryRemoveAll();
+    await repositoryAddAll(OPAM_REPOSITORIES);
+    const ocamlCompiler = await RESOLVED_COMPILER;
     await installOcaml(ocamlCompiler);
     await saveOpamCache();
+  } else {
+    await update();
   }
   if (DUNE_CACHE) {
     await restoreDuneCache();

packages/setup-ocaml/src/installer.ts

@@ -194,3 +194,9 @@ export async function repositoryRemoveAll() {
     }
   });
 }
+
+export async function update() {
+  await core.group("Update the list of available opam packages", async () => {
+    await exec("opam", ["update"]);
+  });
+}