chore: changeset

- Add packages: [] to single-app pnpm-workspace.yaml so pnpm 9 does
  not reject the file with "packages field missing or empty".
- Add astro-app, react-router-app, start-app, next-app workspace
  yamls with the build-script allowlist each template needs
  (esbuild, sharp, unrs-resolver as applicable).
- Set msw: false across all app allowlists so the registry component
  install runs cleanly under pnpm 11 without executing msw's
  service-worker postinstall.
- Add a scaffold test pinning the packages:[] + allowBuilds shape
  so the parser keeps treating it as single-app.

.changeset/grumpy-moles-ring.md

@@ -0,0 +1,5 @@
+---
+"shadcn": patch
+---
+
+add allowBuilds for pnpm 11

packages/shadcn/src/templates/create-template.ts

@@ -104,6 +104,38 @@ function getInstallArgs(packageManager: string): string[] {
   }
 }
 
+async function getPnpmWorkspacePatterns(pnpmWorkspacePath: string) {
+  if (!fs.existsSync(pnpmWorkspacePath)) {
+    return []
+  }
+
+  const workspaceContent = await fs.readFile(pnpmWorkspacePath, "utf8")
+  const patterns: string[] = []
+  let readingPackages = false
+
+  for (const line of workspaceContent.split("\n")) {
+    if (/^packages:\s*$/.test(line)) {
+      readingPackages = true
+      continue
+    }
+
+    if (readingPackages && /^\S/.test(line)) {
+      readingPackages = false
+    }
+
+    if (!readingPackages) {
+      continue
+    }
+
+    const match = line.match(/^\s*-\s*["']?(.+?)["']?\s*$/)
+    if (match) {
+      patterns.push(match[1])
+    }
+  }
+
+  return patterns
+}
+
 // Adapt a pnpm-based monorepo template to the target package manager.
 async function adaptWorkspaceConfig(
   projectPath: string,
@@ -122,7 +154,9 @@ async function adaptWorkspaceConfig(
     await fs.remove(lockFilePath)
   }
 
-  const isMonorepo = fs.existsSync(pnpmWorkspacePath)
+  const hasPnpmWorkspaceConfig = fs.existsSync(pnpmWorkspacePath)
+  const workspacePatterns = await getPnpmWorkspacePatterns(pnpmWorkspacePath)
+  const isMonorepo = workspacePatterns.length > 0
 
   // Update root package.json: update "packageManager" field for the
   // target package manager, and add "workspaces" for npm/bun/yarn.
@@ -140,18 +174,7 @@ async function adaptWorkspaceConfig(
     }
 
     if (isMonorepo) {
-      // Read workspace patterns from pnpm-workspace.yaml.
-      const workspaceContent = await fs.readFile(pnpmWorkspacePath, "utf8")
-      const patterns: string[] = []
-      for (const line of workspaceContent.split("\n")) {
-        const match = line.match(/^\s*-\s*["']?(.+?)["']?\s*$/)
-        if (match) {
-          patterns.push(match[1])
-        }
-      }
-
-      packageJson.workspaces = patterns
-      await fs.remove(pnpmWorkspacePath)
+      packageJson.workspaces = workspacePatterns
     }
 
     await fs.writeFile(
@@ -160,6 +183,10 @@ async function adaptWorkspaceConfig(
     )
   }
 
+  if (hasPnpmWorkspaceConfig) {
+    await fs.remove(pnpmWorkspacePath)
+  }
+
   // Rewrite workspace: protocol references in nested package.json files.
   // npm does not support workspace: protocol; bun and yarn do, so only
   // rewrite for npm monorepo templates.

packages/shadcn/src/utils/scaffold.test.ts

@@ -311,6 +311,84 @@ describe("defaultScaffold", () => {
     expect(written.packageManager).toBe("bun@1.2.0")
   })
 
+  it("should remove pnpm-only workspace config for non-pnpm templates", async () => {
+    vi.mocked(fs.existsSync).mockImplementation((p: any) => {
+      const s = p.toString()
+      return s.includes("pnpm-workspace.yaml") || s.includes("package.json")
+    })
+
+    vi.mocked(fs.readFile).mockImplementation(((filePath: string) => {
+      if (filePath.includes("pnpm-workspace.yaml")) {
+        return Promise.resolve("allowBuilds:\n  esbuild: true\n")
+      }
+      return Promise.resolve(
+        JSON.stringify({ name: "my-app", packageManager: "pnpm@9.0.0" })
+      )
+    }) as any)
+
+    const template = createTestTemplate()
+
+    await template.scaffold({
+      projectPath: "/test/my-app",
+      packageManager: "bun",
+      cwd: "/test",
+    })
+
+    expect(vi.mocked(fs.remove)).toHaveBeenCalledWith(
+      path.join("/test/my-app", "pnpm-workspace.yaml")
+    )
+
+    const writeCalls = vi.mocked(fs.writeFile).mock.calls
+    const adaptCall = writeCalls.find(
+      (call) => call[0] === path.join("/test/my-app", "package.json")
+    )
+    expect(adaptCall).toBeDefined()
+    const written = JSON.parse(adaptCall![1] as string)
+    expect(written.packageManager).toBeUndefined()
+    expect(written.workspaces).toBeUndefined()
+  })
+
+  it("should treat single-app workspace yaml (packages:[] + allowBuilds) as non-monorepo", async () => {
+    vi.mocked(fs.existsSync).mockImplementation((p: any) => {
+      const s = p.toString()
+      return s.includes("pnpm-workspace.yaml") || s.includes("package.json")
+    })
+
+    vi.mocked(fs.readFile).mockImplementation(((filePath: string) => {
+      if (filePath.includes("pnpm-workspace.yaml")) {
+        return Promise.resolve(
+          "packages: []\n\nallowBuilds:\n  esbuild: true\n"
+        )
+      }
+      return Promise.resolve(
+        JSON.stringify({ name: "my-app", packageManager: "pnpm@9.0.0" })
+      )
+    }) as any)
+
+    const template = createTestTemplate()
+
+    await template.scaffold({
+      projectPath: "/test/my-app",
+      packageManager: "npm",
+      cwd: "/test",
+    })
+
+    // Inline empty packages array must not be parsed as a monorepo;
+    // the yaml is stripped and no workspaces array is added.
+    expect(vi.mocked(fs.remove)).toHaveBeenCalledWith(
+      path.join("/test/my-app", "pnpm-workspace.yaml")
+    )
+
+    const writeCalls = vi.mocked(fs.writeFile).mock.calls
+    const adaptCall = writeCalls.find(
+      (call) => call[0] === path.join("/test/my-app", "package.json")
+    )
+    expect(adaptCall).toBeDefined()
+    const written = JSON.parse(adaptCall![1] as string)
+    expect(written.packageManager).toBeUndefined()
+    expect(written.workspaces).toBeUndefined()
+  })
+
   it("should rewrite workspace: protocol refs to * for npm monorepo", async () => {
     vi.mocked(fs.existsSync).mockImplementation((p: any) => {
       const s = p.toString()

templates/astro-app/pnpm-workspace.yaml

@@ -0,0 +1,6 @@
+packages: []
+
+allowBuilds:
+  esbuild: true
+  sharp: true
+  msw: false

templates/next-app/pnpm-workspace.yaml

@@ -0,0 +1,6 @@
+packages: []
+
+allowBuilds:
+  sharp: true
+  unrs-resolver: true
+  msw: false

templates/react-router-app/pnpm-workspace.yaml

@@ -0,0 +1,5 @@
+packages: []
+
+allowBuilds:
+  esbuild: true
+  msw: false

templates/start-app/pnpm-workspace.yaml

@@ -0,0 +1,6 @@
+packages: []
+
+allowBuilds:
+  esbuild: true
+  unrs-resolver: true
+  msw: false

templates/vite-app/pnpm-workspace.yaml

@@ -0,0 +1,5 @@
+packages: []
+
+allowBuilds:
+  esbuild: true
+  msw: false

templates/vite-monorepo/pnpm-workspace.yaml

@@ -1,3 +1,6 @@
 packages:
   - "apps/*"
   - "packages/*"
+
+allowBuilds:
+  esbuild: true