fix: vue-tsc does not show ts errors in the terminal with `--incremen…

…tal`

refs vuejs/language-tools#4194

packages/typescript/lib/node/proxyCreateProgram.ts

@@ -1,7 +1,10 @@
 import type * as ts from 'typescript';
 import { decorateProgram } from './decorateProgram';
-import { LanguagePlugin, createLanguage } from '@volar/language-core';
+import { Language, LanguagePlugin, createLanguage } from '@volar/language-core';
 import { createResolveModuleName } from '../resolveModuleName';
+import { transformSourceFile } from './transform';
+
+let language: Language;
 
 export function proxyCreateProgram(
 	ts: typeof import('typescript'),
@@ -20,7 +23,7 @@ export function proxyCreateProgram(
 				.map(plugin => plugin.typescript?.extraFileExtensions.map(({ extension }) => `.${extension}`) ?? [])
 				.flat();
 			const sourceFileToSnapshotMap = new WeakMap<ts.SourceFile, ts.IScriptSnapshot>();
-			const language = createLanguage(
+			language = createLanguage(
 				languagePlugins,
 				ts.sys.useCaseSensitiveFileNames,
 				fileName => {
@@ -154,3 +157,24 @@ function assert(condition: unknown, message: string): asserts condition {
 		throw new Error(message);
 	}
 }
+
+export function proxyConvertToDiagnosticRelatedInformation(
+	original: Function,
+) {
+	return new Proxy(original, {
+		apply: (target, thisArg, args) => {
+			const diagnostic = Reflect.apply(target, thisArg, args) as ts.DiagnosticRelatedInformation;
+			const { file } = diagnostic;
+			const sourceScript = file ? language.scripts.get(file.fileName) : undefined;
+
+			if (!sourceScript) {
+				return diagnostic;
+			}
+
+			return {
+				...diagnostic,
+				file: transformSourceFile(file!, sourceScript.snapshot.getText(0, sourceScript.snapshot.getLength())),
+			};
+		},
+	});
+}

packages/typescript/lib/quickstart/runTsc.ts

@@ -42,6 +42,15 @@ export function runTsc(
 				+ s.replace('createProgram', '_createProgram')
 			);
 
+			// proxy convertToDiagnosticRelatedInformation for `--incremental`
+			try {
+				tsc = replace(tsc, /function convertToDiagnosticRelatedInformation\(.+\) {/, s =>
+					`var convertToDiagnosticRelatedInformation = require(${JSON.stringify(proxyApiPath)})`
+					+ `.proxyConvertToDiagnosticRelatedInformation(_convertToDiagnosticRelatedInformation);\n`
+					+ s.replace('convertToDiagnosticRelatedInformation', '_convertToDiagnosticRelatedInformation')
+				);
+			} catch { /*ignore*/ }
+
 			return tsc;
 		}
 		return (readFileSync as any)(...args);