Files
pnpm/installing
Zoltan Kochan 9b801c888d fix: check allowBuild for packages with cached side-effects (#11039)
Closes #11035

## Summary

### Root cause fix: don't apply cached side-effects for unapproved packages
When importing packages from the store, side-effects cache was applied for any package not explicitly denied (`allowBuild !== false`). This meant unapproved packages (`allowBuild === undefined`) got cached build artifacts, setting `isBuilt: true` and bypassing the `allowBuild` check in `buildModules`.

**Fix:** Only apply side-effects cache when `allowBuild` returns `true` (explicitly approved). Changed in three locations:
- `installing/deps-restorer/src/index.ts` (isolated linker)
- `installing/deps-restorer/src/linkHoistedModules.ts` (hoisted linker)
- `installing/deps-installer/src/install/link.ts` (non-headless install)

### Revocation detection
When a package's build approval is revoked between installs (was `true` in `.modules.yaml`, now undefined), detect it in `mutateModules` and add to `ignoredBuilds` so `strictDepBuilds` fails.

### Status messages in `_rebuild`
Users now see what happened to each package during rebuild:
- `pkg@version: built successfully`
- `pkg@version: skipped (no build scripts)`
- `pkg@version: skipped (not allowed)`
- `pkg@version: reused from store cache`

And during install:
- `pkg@version: reused from store (side effects cache)`

### `buildSelectedPkgs` fixes
- Preserve `storeDir`, `virtualStoreDir`, `virtualStoreDirMaxLength` from existing `.modules.yaml` instead of overwriting with config-derived values (which caused "reinstall from scratch" prompt)
- Write `allowBuilds` to `.modules.yaml` so GVS doesn't detect a mismatch on next install
- Merge `ignoredBuilds` with existing entries for packages not being rebuilt
2026-03-21 12:51:24 +01:00
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