Fix Vue auto-import completions with Astro extension (#17791)

Author: matthewp

.changeset/legal-pets-leave.md

@@ -0,0 +1,5 @@
+---
+'astro-vscode': patch
+---
+
+Fixes missing Vue template auto-import completions when the Astro extension loads first

packages/language-tools/ts-plugin/test/units/proxy-language-service.test.mts

@@ -0,0 +1,27 @@
+import 'mocha';
+import assert from 'node:assert';
+import type { Language } from '@volar/language-core';
+import { createProxyLanguageService } from '@volar/typescript/lib/node/proxyLanguageService.js';
+import type ts from 'typescript';
+
+suite('Proxy language service', () => {
+	test('uses language service methods assigned by a later plugin', () => {
+		let called = 'original';
+		const languageService = {
+			getCompletionsAtPosition() {
+				called = 'original';
+			},
+		} as unknown as ts.LanguageService;
+		const { initialize, proxy } = createProxyLanguageService(languageService);
+
+		initialize({ scripts: { get: () => undefined } } as unknown as Language<string>);
+		void proxy.getCompletionsAtPosition;
+		proxy.getCompletionsAtPosition = () => {
+			called = 'decorated';
+			return undefined;
+		};
+		proxy.getCompletionsAtPosition('component.vue', 0, undefined);
+
+		assert.strictEqual(called, 'decorated');
+	});
+});

patches/@volar__typescript@2.4.28.patch

@@ -0,0 +1,12 @@
+diff --git a/lib/node/proxyLanguageService.js b/lib/node/proxyLanguageService.js
+index 95f2cc3ef6336b7762bcd0a5036af27b114367a5..9b0c9e0a68bed912737dd8d2179afe21997277f7 100644
+--- a/lib/node/proxyLanguageService.js
++++ b/lib/node/proxyLanguageService.js
+@@ -112,6 +112,7 @@ function createProxyLanguageService(languageService) {
+                 return Reflect.get(target, p, receiver);
+             },
+             set(target, p, value, receiver) {
++                proxyCache.delete(p);
+                 return Reflect.set(target, p, value, receiver);
+             },
+         }),

pnpm-lock.yaml

@@ -101,3 +101,6 @@ allowBuilds:
   protobufjs: false
   sharp: false
   workerd: false
+
+patchedDependencies:
+  '@volar/typescript@2.4.28': patches/@volar__typescript@2.4.28.patch