fix: running an install after the fetch command should hoist all dependencies (#9690)

close #9689

.changeset/rude-needles-wave.md

@@ -0,0 +1,11 @@
+---
+"@pnpm/plugin-commands-installation": patch
+"pnpm": patch
+---
+
+Running `pnpm install` after `pnpm fetch` should hoist all dependencies that need to be hoisted.
+Fixes a regression introduced in [v10.12.2] by [#9648]; resolves [#9689].
+
+[v10.12.2]: https://github.com/pnpm/pnpm/releases/tag/v10.12.2Add commentMore actions
+[#9648]: https://github.com/pnpm/pnpm/pull/9648
+[#9689]: https://github.com/pnpm/pnpm/issues/9689

pkg-manager/plugin-commands-installation/src/fetch.ts

@@ -69,5 +69,10 @@ export async function handler (opts: FetchCommandOptions): Promise<void> {
     pruneStore: true,
     storeController: store.ctrl,
     storeDir: store.dir,
+    // Hoisting is skipped anyway,
+    // so we store these empty patterns in node_modules/.modules.yaml
+    // to let the subsequent install know that hoisting should be performed.
+    hoistPattern: [],
+    publicHoistPattern: [],
   } as InstallOptions)
 }