From ca4422e86a8b3039d6b6168fee09b6345d43a504 Mon Sep 17 00:00:00 2001
From: Alan Agius <17563226+alan-agius4@users.noreply.github.com>
Date: Mon, 2 Nov 2026 11:09:02 +0000
Subject: [PATCH 1/2] fix(@schematics/angular): generate pnpm-workspace.yaml
 with allowBuilds for pnpm projects

Starting in pnpm 11, `strictDepBuilds` is enabled by default and pnpm
fails with `ERR_PNPM_IGNORED_BUILDS` when any dependency in the graph
declares lifecycle build scripts that are not listed in `allowBuilds` in
`pnpm-workspace.yaml`.

Generate a `pnpm-workspace.yaml` file when scaffolding a new workspace
with `pnpm` that configures `allowBuilds` to `false` for the transitive
build dependencies (`@parcel/watcher`, `esbuild`, `lmdb`, and
`msgpackr-extract`), which already ship prebuilt native binaries via
`optionalDependencies` and do not need their fallback install scripts
to execute.

Fixes #34622
---
 .../files/pnpm-workspace.yaml.template          |  8 ++++++++
 packages/schematics/angular/workspace/index.ts  |  5 ++++-
 .../schematics/angular/workspace/index_spec.ts  | 17 ++++++++++++++++-
 3 files changed, 28 insertions(+), 2 deletions(-)
 create mode 100644 packages/schematics/angular/workspace/files/pnpm-workspace.yaml.template

diff --git a/packages/schematics/angular/workspace/files/pnpm-workspace.yaml.template b/packages/schematics/angular/workspace/files/pnpm-workspace.yaml.template
new file mode 100644
index 000000000000..90a89a59b109
--- /dev/null
+++ b/packages/schematics/angular/workspace/files/pnpm-workspace.yaml.template
@@ -0,0 +1,8 @@
+packages:
+  - '.'
+
+allowBuilds:
+  '@parcel/watcher': false
+  esbuild: false
+  lmdb: false
+  msgpackr-extract: false
diff --git a/packages/schematics/angular/workspace/index.ts b/packages/schematics/angular/workspace/index.ts
index 85205042f3e3..60dd9ac7d0a6 100644
--- a/packages/schematics/angular/workspace/index.ts
+++ b/packages/schematics/angular/workspace/index.ts
@@ -18,7 +18,7 @@ import {
 } from '@angular-devkit/schematics';
 import { execSync } from 'node:child_process';
 import { latestVersions } from '../utility/latest-versions';
-import { Schema as WorkspaceOptions } from './schema';
+import { PackageManager, Schema as WorkspaceOptions } from './schema';
 
 export default function (options: WorkspaceOptions): Rule {
   return () => {
@@ -48,6 +48,9 @@ export default function (options: WorkspaceOptions): Rule {
     return mergeWith(
       apply(url('./files'), [
         options.minimal ? filter((path) => !path.endsWith('editorconfig.template')) : noop(),
+        packageManager !== PackageManager.Pnpm
+          ? filter((path) => !path.endsWith('pnpm-workspace.yaml.template'))
+          : noop(),
         applyTemplates({
           utils: strings,
           ...options,
diff --git a/packages/schematics/angular/workspace/index_spec.ts b/packages/schematics/angular/workspace/index_spec.ts
index a13a7d3e1bb7..371efa99d470 100644
--- a/packages/schematics/angular/workspace/index_spec.ts
+++ b/packages/schematics/angular/workspace/index_spec.ts
@@ -9,7 +9,7 @@
 import { SchematicTestRunner } from '@angular-devkit/schematics/testing';
 import { parse as parseJson } from 'jsonc-parser';
 import { latestVersions } from '../utility/latest-versions';
-import { Schema as WorkspaceOptions } from './schema';
+import { PackageManager, Schema as WorkspaceOptions } from './schema';
 
 describe('Workspace Schematic', () => {
   const schematicRunner = new SchematicTestRunner(
@@ -38,6 +38,21 @@ describe('Workspace Schematic', () => {
         '/tsconfig.json',
       ]),
     );
+    expect(files).not.toContain('/pnpm-workspace.yaml');
+  });
+
+  it('should create pnpm-workspace.yaml with allowBuilds when packageManager is pnpm', async () => {
+    const tree = await schematicRunner.runSchematic('workspace', {
+      ...defaultOptions,
+      packageManager: PackageManager.Pnpm,
+    });
+    expect(tree.exists('/pnpm-workspace.yaml')).toBeTrue();
+    const content = tree.readContent('/pnpm-workspace.yaml');
+    expect(content).toContain('allowBuilds:');
+    expect(content).toContain("'@parcel/watcher': false");
+    expect(content).toContain('esbuild: false');
+    expect(content).toContain('lmdb: false');
+    expect(content).toContain('msgpackr-extract: false');
   });
 
   it('should set the name in package.json', async () => {

From bc870b8c9b4dd156e1a0e3547c59beec6f7bfb9d Mon Sep 17 00:00:00 2001
From: Alan Agius <17563226+alan-agius4@users.noreply.github.com>
Date: Mon, 2 Nov 2026 12:05:00 +0000
Subject: [PATCH 2/2] fixup! fix(@schematics/angular): generate
 pnpm-workspace.yaml with allowBuilds for pnpm projects

---
 packages/schematics/angular/workspace/index_spec.ts | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/packages/schematics/angular/workspace/index_spec.ts b/packages/schematics/angular/workspace/index_spec.ts
index 371efa99d470..fbd2643b4052 100644
--- a/packages/schematics/angular/workspace/index_spec.ts
+++ b/packages/schematics/angular/workspace/index_spec.ts
@@ -49,10 +49,6 @@ describe('Workspace Schematic', () => {
     expect(tree.exists('/pnpm-workspace.yaml')).toBeTrue();
     const content = tree.readContent('/pnpm-workspace.yaml');
     expect(content).toContain('allowBuilds:');
-    expect(content).toContain("'@parcel/watcher': false");
-    expect(content).toContain('esbuild: false');
-    expect(content).toContain('lmdb: false');
-    expect(content).toContain('msgpackr-extract: false');
   });
 
   it('should set the name in package.json', async () => {