fix: hoisting of dependencies after resolution stage (#9686)

close #9685

.changeset/silver-clubs-eat.md

@@ -0,0 +1,11 @@
+---
+"@pnpm/core": patch
+"pnpm": patch
+---
+
+Restore hoisting of optional peer dependencies when installing with an outdated lockfile.
+Regression introduced in [v10.12.2] by [#9648]; resolves [#9685].
+
+[v10.12.2]: https://github.com/pnpm/pnpm/releases/tag/v10.12.2
+[#9648]: https://github.com/pnpm/pnpm/pull/9648
+[#9685]: https://github.com/pnpm/pnpm/issues/9685

pkg-manager/core/src/install/link.ts

@@ -218,7 +218,12 @@ export async function linkPackages (projects: ImporterToUpdate[], depGraph: Depe
       ...await hoist({
         extraNodePath: opts.extraNodePaths,
         graph: depGraph,
-        directDepsByImporterId: opts.dependenciesByProjectId,
+        directDepsByImporterId: {
+          ...opts.dependenciesByProjectId,
+          '.': new Map(Array.from(opts.dependenciesByProjectId['.']?.entries() ?? []).filter(([alias]) => {
+            return newCurrentLockfile.importers['.' as ProjectId].specifiers[alias]
+          })),
+        },
         importerIds: projectIds,
         privateHoistedModulesDir: opts.hoistedModulesDir,
         privateHoistPattern: opts.hoistPattern ?? [],