feat(@angular/build): add sass to stylePreprocessorOptions in application builder

packages/angular/build/src/builders/application/schema.json

@@ -125,6 +125,34 @@
             "type": "string"
           },
           "default": []
+        },
+        "sass": {
+          "description": "Options to pass to the sass preprocessor.",
+          "type": "object",
+          "properties": {
+            "fatalDeprecations": {
+              "description": "A set of deprecations to treat as fatal. If a deprecation warning of any provided type is encountered during compilation, the compiler will error instead. If a Version is provided, then all deprecations that were active in that compiler version will be treated as fatal.",
+              "type": "array",
+              "items": {
+                "type": "string"
+              }
+            },
+            "silenceDeprecations": {
+              "description": " A set of active deprecations to ignore. If a deprecation warning of any provided type is encountered during compilation, the compiler will ignore it instead.",
+              "type": "array",
+              "items": {
+                "type": "string"
+              }
+            },
+            "futureDeprecations": {
+              "description": "A set of future deprecations to opt into early. Future deprecations passed here will be treated as active by the compiler, emitting warnings as necessary.",
+              "type": "array",
+              "items": {
+                "type": "string"
+              }
+            }
+          },
+          "additionalProperties": false
         }
       },
       "additionalProperties": false

packages/angular/build/src/builders/application/tests/options/style-preprocessor-options-sass_spec.ts

@@ -0,0 +1,89 @@
+/**
+ * @license
+ * Copyright Google LLC All Rights Reserved.
+ *
+ * Use of this source code is governed by an MIT-style license that can be
+ * found in the LICENSE file at https://angular.dev/license
+ */
+
+import { buildApplication } from '../../index';
+import { APPLICATION_BUILDER_INFO, BASE_OPTIONS, describeBuilder } from '../setup';
+import { logging } from '@angular-devkit/core';
+
+describeBuilder(buildApplication, APPLICATION_BUILDER_INFO, (harness) => {
+  describe('Option: "stylePreprocessorOptions.sass"', () => {
+    it('should cause the build to fail when using `fatalDeprecations` in global styles', async () => {
+      await harness.writeFile('src/styles.scss', 'p { color: darken(red, 10%) }');
+
+      harness.useTarget('build', {
+        ...BASE_OPTIONS,
+        styles: ['src/styles.scss'],
+        stylePreprocessorOptions: {
+          sass: {
+            fatalDeprecations: ['color-functions'],
+          },
+        },
+      });
+
+      const { result, logs } = await harness.executeOnce({ outputLogsOnFailure: false });
+
+      expect(result?.success).toBeFalse();
+      expect(logs).not.toContain(
+        jasmine.objectContaining<logging.LogEntry>({
+          message: jasmine.stringMatching('darken() is deprecated'),
+        }),
+      );
+    });
+
+    it('should succeed without `fatalDeprecations` despite using deprecated color functions', async () => {
+      await harness.writeFiles({
+        'src/styles.scss': 'p { color: darken(red, 10%) }',
+        'src/app/app.component.scss': 'p { color: darken(red, 10%) }',
+      });
+
+      await harness.modifyFile('src/app/app.component.ts', (content) => {
+        return content.replace('./app.component.css', 'app.component.scss');
+      });
+
+      harness.useTarget('build', {
+        ...BASE_OPTIONS,
+        styles: ['src/styles.scss'],
+        stylePreprocessorOptions: {
+          sass: {},
+        },
+      });
+
+      const { result } = await harness.executeOnce();
+
+      expect(result?.success).toBeTrue();
+    });
+
+    it('should cause the build to fail when using `fatalDeprecations` in component styles', async () => {
+      await harness.modifyFile('src/app/app.component.ts', (content) => {
+        return content.replace('./app.component.css', 'app.component.scss');
+      });
+
+      await harness.writeFile('src/app/app.component.scss', 'p { color: darken(red, 10%) }');
+
+      harness.useTarget('build', {
+        ...BASE_OPTIONS,
+        stylePreprocessorOptions: {
+          sass: {
+            fatalDeprecations: ['color-functions'],
+          },
+        },
+      });
+
+      const { result, logs } = await harness.executeOnce({
+        outputLogsOnFailure: false,
+      });
+
+      expect(result?.success).toBeFalse();
+      expect(logs).not.toContain(
+        jasmine.objectContaining<logging.LogEntry>({
+          message: jasmine.stringMatching('darken() is deprecated'),
+        }),
+      );
+    });
+  });
+});

packages/angular/build/src/tools/esbuild/compiler-plugin-options.ts

@@ -68,6 +68,9 @@ export function createCompilerPluginOptions(
         sourcemapOptions.styles && !sourcemapOptions.hidden ? 'linked' : false,
       outputNames,
       includePaths: stylePreprocessorOptions?.includePaths,
+      // string[] | undefined' is not assignable to type '(Version | DeprecationOrId)[] | undefined'.
+      // eslint-disable-next-line @typescript-eslint/no-explicit-any
+      sass: stylePreprocessorOptions?.sass as any,
       externalDependencies,
       target,
       inlineStyleLanguage,

packages/angular/build/src/tools/esbuild/global-styles.ts

@@ -63,6 +63,9 @@ export function createGlobalStylesBundleOptions(
               bundles: '[name]',
             },
         includePaths: stylePreprocessorOptions?.includePaths,
+        // string[] | undefined' is not assignable to type '(Version | DeprecationOrId)[] | undefined'.
+        // eslint-disable-next-line @typescript-eslint/no-explicit-any
+        sass: stylePreprocessorOptions?.sass as any,
         tailwindConfiguration,
         postcssConfiguration,
         cacheOptions,

packages/angular/build/src/tools/esbuild/stylesheets/bundle-options.ts

@@ -16,7 +16,7 @@ import { CssStylesheetLanguage } from './css-language';
 import { createCssResourcePlugin } from './css-resource-plugin';
 import { LessStylesheetLanguage } from './less-language';
 import { SassStylesheetLanguage } from './sass-language';
-import { StylesheetPluginFactory } from './stylesheet-plugin-factory';
+import { StylesheetPluginFactory, StylesheetPluginsass } from './stylesheet-plugin-factory';
 
 export interface BundleStylesheetOptions {
   workspaceRoot: string;
@@ -26,6 +26,7 @@ export interface BundleStylesheetOptions {
   sourcemap: boolean | 'external' | 'inline' | 'linked';
   outputNames: { bundles: string; media: string };
   includePaths?: string[];
+  sass?: StylesheetPluginsass;
   externalDependencies?: string[];
   target: string[];
   tailwindConfiguration?: { file: string; package: string };
@@ -51,6 +52,7 @@ export function createStylesheetBundleOptions(
       inlineComponentData,
       tailwindConfiguration: options.tailwindConfiguration,
       postcssConfiguration: options.postcssConfiguration,
+      sass: options.sass,
     },
     cache,
   );

packages/angular/build/src/tools/esbuild/stylesheets/sass-language.ts

@@ -94,8 +94,9 @@ async function compileString(
   // failing resolution attempts.
   const resolutionCache = new MemoryCache<URL | null>();
   const packageRootCache = new MemoryCache<string | null>();
-
   const warnings: PartialMessage[] = [];
+  const { silenceDeprecations, futureDeprecations, fatalDeprecations } = options.sass ?? {};
+
   try {
     const { css, sourceMap, loadedUrls } = await sassWorkerPool.compileStringAsync(data, {
       url: pathToFileURL(filePath),
@@ -104,6 +105,9 @@ async function compileString(
       loadPaths: options.includePaths,
       sourceMap: options.sourcemap,
       sourceMapIncludeSources: options.sourcemap,
+      silenceDeprecations,
+      fatalDeprecations,
+      futureDeprecations,
       quietDeps: true,
       importers: [
         {

packages/angular/build/src/tools/esbuild/stylesheets/stylesheet-plugin-factory.ts

@@ -11,9 +11,18 @@ import glob from 'fast-glob';
 import assert from 'node:assert';
 import { readFile } from 'node:fs/promises';
 import { extname } from 'node:path';
+import type { Options } from 'sass';
 import type { PostcssConfiguration } from '../../../utils/postcss-configuration';
 import { LoadResultCache, createCachedLoad } from '../load-result-cache';
 
+/**
+ * Configuration options for handling Sass-specific deprecations in a stylesheet plugin.
+ */
+export type StylesheetPluginsass = Pick<
+  Options<'async'>,
+  'futureDeprecations' | 'fatalDeprecations' | 'silenceDeprecations'
+>;
+
 /**
  * Convenience type for a postcss processor.
  */
@@ -60,6 +69,11 @@ export interface StylesheetPluginOptions {
    * and any tailwind usage must be manually configured in the custom postcss usage.
    */
   postcssConfiguration?: PostcssConfiguration;
+
+  /**
+   * Optional Options for configuring Sass behavior.
+   */
+  sass?: StylesheetPluginsass;
 }
 
 /**