fix(migrate): preserve workspace members when selecting pnpm

crates/vp_cli_snapshots/tests/cli_snapshots/fixtures/migration_workspace_members/.gitignore

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

crates/vp_cli_snapshots/tests/cli_snapshots/fixtures/migration_workspace_members/package.json

@@ -0,0 +1,7 @@
+{
+  "name": "migration-workspace-members",
+  "private": true,
+  "workspaces": [
+    "packages/*"
+  ]
+}

crates/vp_cli_snapshots/tests/cli_snapshots/fixtures/migration_workspace_members/packages/a/index.html

@@ -0,0 +1,2 @@
+<!doctype html>
+<title>Workspace member a</title>

crates/vp_cli_snapshots/tests/cli_snapshots/fixtures/migration_workspace_members/packages/a/package.json

@@ -0,0 +1,11 @@
+{
+  "name": "a",
+  "private": true,
+  "type": "module",
+  "scripts": {
+    "build": "vite build"
+  },
+  "devDependencies": {
+    "vite": "^7.0.0"
+  }
+}

crates/vp_cli_snapshots/tests/cli_snapshots/fixtures/migration_workspace_members/packages/b/index.html

@@ -0,0 +1,2 @@
+<!doctype html>
+<title>Workspace member b</title>

crates/vp_cli_snapshots/tests/cli_snapshots/fixtures/migration_workspace_members/packages/b/package.json

@@ -0,0 +1,11 @@
+{
+  "name": "b",
+  "private": true,
+  "type": "module",
+  "scripts": {
+    "build": "vite build"
+  },
+  "devDependencies": {
+    "vite": "^7.0.0"
+  }
+}

crates/vp_cli_snapshots/tests/cli_snapshots/fixtures/migration_workspace_members/snapshots.toml

@@ -0,0 +1,12 @@
+[[case]]
+name = "migration_workspace_members"
+vp = "local"
+local-registry = true
+unset-env = ["VP_SKIP_INSTALL"]
+steps = [
+  { argv = ["vp", "migrate", "--no-interactive", "--no-hooks", "--no-agent", "--no-editor"], comment = "migrate a workspace without a lockfile or package-manager declaration", timeout = 120000 },
+  { argv = ["vpt", "print-file", "pnpm-workspace.yaml"], comment = "the selected pnpm manager retains the workspace members" },
+  { argv = ["vp", "run", "-r", "build"], comment = "both migrated workspace members remain runnable", snapshot = false },
+  { argv = ["vpt", "stat-file", "packages/a/dist/index.html", "--assert", "file"] },
+  { argv = ["vpt", "stat-file", "packages/b/dist/index.html", "--assert", "file"] },
+]

crates/vp_cli_snapshots/tests/cli_snapshots/fixtures/migration_workspace_members/snapshots/migration_workspace_members.md

@@ -0,0 +1,52 @@
+# migration_workspace_members
+
+## `vp migrate --no-interactive --no-hooks --no-agent --no-editor`
+
+migrate a workspace without a lockfile or package-manager declaration
+
+```
+VITE+ - The Unified Toolchain for the Web
+
+● Formatting code...
+● Code formatted
+◇ Migrated . to Vite+ <version>
+• Node <version>  pnpm <version>
+✓ Dependencies installed in <duration>
+• 1 config update applied
+```
+
+## `vpt print-file pnpm-workspace.yaml`
+
+the selected pnpm manager retains the workspace members
+
+```
+packages:
+  - packages/*
+catalog:
+  vite: npm:@voidzero-dev/vite-plus-core@<version>
+  vite-plus: <version>
+overrides:
+  vite@*: "catalog:"
+peerDependencyRules:
+  allowAny:
+    - vite
+  allowedVersions:
+    vite: "*"
+```
+
+## `vp run -r build`
+
+both migrated workspace members remain runnable
+
+
+## `vpt stat-file packages/a/dist/index.html --assert file`
+
+```
+packages/a/dist/index.html: file
+```
+
+## `vpt stat-file packages/b/dist/index.html --assert file`
+
+```
+packages/b/dist/index.html: file
+```

packages/cli/src/migration/__tests__/migrator.spec.ts

@@ -1866,6 +1866,61 @@ function readJson(filePath: string): Record<string, unknown> {
   return JSON.parse(fs.readFileSync(filePath, 'utf8'));
 }
 
+describe('first migration preserves pnpm workspace membership', () => {
+  let project: string;
+
+  beforeEach(() => {
+    project = fs.mkdtempSync(path.join(os.tmpdir(), 'vp-workspace-members-'));
+    fs.writeFileSync(
+      path.join(project, 'package.json'),
+      JSON.stringify({
+        name: 'root',
+        private: true,
+        workspaces: ['packages/*', '!packages/fixtures'],
+      }),
+    );
+  });
+
+  afterEach(() => {
+    fs.rmSync(project, { recursive: true, force: true });
+  });
+
+  it.each([undefined, 'catalog:\n  example: ^1.0.0\n'])(
+    'writes detected globs when the workspace file has no packages: %s',
+    (existing) => {
+      const workspaceFile = path.join(project, 'pnpm-workspace.yaml');
+      if (existing !== undefined) {
+        fs.writeFileSync(workspaceFile, existing);
+      }
+      const workspace = makeWorkspaceInfo(project, PackageManager.pnpm, '11.24.0');
+      workspace.isMonorepo = true;
+      workspace.workspacePatterns = ['packages/*', '!packages/fixtures'];
+
+      rewriteMonorepo(workspace, true, true);
+
+      expect(readYamlObject(workspaceFile).packages).toEqual(workspace.workspacePatterns);
+      if (existing !== undefined) {
+        expect(readYamlObject(workspaceFile).catalog).toMatchObject({ example: '^1.0.0' });
+      }
+      const migrated = fs.readFileSync(workspaceFile, 'utf8');
+      rewriteMonorepo(workspace, true, true);
+      expect(fs.readFileSync(workspaceFile, 'utf8')).toBe(migrated);
+    },
+  );
+
+  it('preserves an existing packages field', () => {
+    const workspaceFile = path.join(project, 'pnpm-workspace.yaml');
+    fs.writeFileSync(workspaceFile, 'packages:\n  - apps/*\n');
+    const workspace = makeWorkspaceInfo(project, PackageManager.pnpm);
+    workspace.isMonorepo = true;
+    workspace.workspacePatterns = ['packages/*'];
+
+    rewriteMonorepo(workspace, true, true);
+
+    expect(readYamlObject(workspaceFile).packages).toEqual(['apps/*']);
+  });
+});
+
 function readYaml(filePath: string): string {
   return fs.readFileSync(filePath, 'utf8');
 }

packages/cli/src/migration/migrator/orchestrators.ts

@@ -17,6 +17,7 @@ import {
   dropDeadOxlintPluginsDependency,
   dropRemovePackageOverrideKeys,
   ensurePnpmWorkspaceExoticSubdepsSetting,
+  ensurePnpmWorkspacePackages,
   findYarnWorkspaceHoisting,
   hasDirectVitePlusInstallEntry,
   hasOwnWebdriverioDependency,
@@ -438,6 +439,7 @@ export function rewriteMonorepo(
       providerCatalogAdditions,
       usesWebdriverio,
     );
+    ensurePnpmWorkspacePackages(workspaceInfo.rootDir, workspaceInfo.workspacePatterns);
     if (usePnpmWorkspaceSettings && isForceOverrideMode()) {
       migratePnpmOverridesToWorkspaceYaml(workspaceInfo.rootDir, {
         [VITE_PLUS_NAME]: VITE_PLUS_VERSION,