tests.pnpm: add pnpm_11_v4 test for fetcherVersion 4

Tests the SQLite dump/reconstruct code path introduced in fetcherVersion 4,
which ensures reproducibility of the pnpm v11 store index.

Assisted-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

pkgs/test/pnpm/default.nix

@@ -3,4 +3,5 @@
   pnpm-empty-lockfile = callPackage ./pnpm-empty-lockfile { };
   pnpm-fixup-state-db = callPackage ./pnpm-fixup-state-db { };
   pnpm_11_v3 = callPackage ./pnpm_11_v3 { };
+  pnpm_11_v4 = callPackage ./pnpm_11_v4 { };
 }

pkgs/test/pnpm/pnpm_11_v4/default.nix

@@ -0,0 +1,60 @@
+{
+  fetchPnpmDeps,
+  lib,
+  makeShellWrapper,
+  nodejs,
+  pnpmConfigHook,
+  pnpm_11,
+  stdenv,
+  testers,
+}:
+let
+  pnpm = pnpm_11;
+in
+stdenv.mkDerivation (finalAttrs: {
+  pname = "pnpm-test";
+  inherit (pnpm) version;
+
+  src = ./src;
+
+  pnpmDeps = testers.invalidateFetcherByDrvHash fetchPnpmDeps {
+    inherit (finalAttrs) pname version src;
+    inherit pnpm;
+    fetcherVersion = 4;
+    hash = "sha256-f5EC0m+y9vvt+6alquFjdgGmH8ha1YprthBU3dnq9SE=";
+  };
+
+  nativeBuildInputs = [
+    makeShellWrapper
+    nodejs
+    pnpm
+    pnpmConfigHook
+  ];
+
+  buildPhase = ''
+    runHook preBuild
+
+    pnpm build
+
+    runHook postBuild
+  '';
+
+  installPhase = ''
+    runHook preInstall
+
+    install -Dm644 -t $out/lib/pnpm-11-test dist/index.js
+
+    makeWrapper ${lib.getExe nodejs} $out/bin/pnpm-11-test \
+      --add-flags "$out/lib/pnpm-11-test"
+
+    runHook postInstall
+  '';
+
+  __structuredAttrs = true;
+
+  meta = {
+    license = lib.licenses.mit;
+    mainProgram = "pnpm-11-test";
+    inherit (pnpm.meta) maintainers;
+  };
+})

pkgs/test/pnpm/pnpm_11_v4/src/.gitignore

@@ -0,0 +1,2 @@
+dist/
+node_modules/

pkgs/test/pnpm/pnpm_11_v4/src/index.ts

@@ -0,0 +1 @@
+console.log("Hello World");

pkgs/test/pnpm/pnpm_11_v4/src/package.json

@@ -0,0 +1,20 @@
+{
+  "name": "pnpm11test",
+  "version": "1.0.0",
+  "description": "",
+  "main": "dist/index.js",
+  "scripts": {
+    "build": "tsc",
+    "start": "node dist/index.js"
+  },
+  "license": "MIT",
+  "packageManager": "pnpm",
+  "type": "module",
+  "files": [
+    "dist/"
+  ],
+  "devDependencies": {
+    "@types/node": "^25.5.0",
+    "typescript": "^6.0.2"
+  }
+}

pkgs/test/pnpm/pnpm_11_v4/src/pnpm-lock.yaml

@@ -0,0 +1,39 @@
+lockfileVersion: '9.0'
+
+settings:
+  autoInstallPeers: true
+  excludeLinksFromLockfile: false
+
+importers:
+
+  .:
+    devDependencies:
+      '@types/node':
+        specifier: ^25.5.0
+        version: 25.5.0
+      typescript:
+        specifier: ^6.0.2
+        version: 6.0.2
+
+packages:
+
+  '@types/node@25.5.0':
+    resolution: {integrity: sha512-jp2P3tQMSxWugkCUKLRPVUpGaL5MVFwF8RDuSRztfwgN1wmqJeMSbKlnEtQqU8UrhTmzEmZdu2I6v2dpp7XIxw==}
+
+  typescript@6.0.2:
+    resolution: {integrity: sha512-bGdAIrZ0wiGDo5l8c++HWtbaNCWTS4UTv7RaTH/ThVIgjkveJt83m74bBHMJkuCbslY8ixgLBVZJIOiQlQTjfQ==}
+    engines: {node: '>=14.17'}
+    hasBin: true
+
+  undici-types@7.18.2:
+    resolution: {integrity: sha512-AsuCzffGHJybSaRrmr5eHr81mwJU3kjw6M+uprWvCXiNeN9SOGwQ3Jn8jb8m3Z6izVgknn1R0FTCEAP2QrLY/w==}
+
+snapshots:
+
+  '@types/node@25.5.0':
+    dependencies:
+      undici-types: 7.18.2
+
+  typescript@6.0.2: {}
+
+  undici-types@7.18.2: {}

pkgs/test/pnpm/pnpm_11_v4/src/tsconfig.json

@@ -0,0 +1,13 @@
+{
+  "compilerOptions": {
+    "target": "ESNext",
+    "module": "NodeNext",
+    "moduleResolution": "NodeNext",
+    "outDir": "dist",
+    "rootDir": ".",
+    "strict": true,
+    "esModuleInterop": true,
+    "skipLibCheck": true,
+    "forceConsistentCasingInFileNames": true
+  }
+}