chore(lint): enforce use of type-only imports (#5658)

Author: so1ve

packages/typescript-plugin/lib/requests/getReactiveReferences.ts

@@ -1,5 +1,5 @@
 import { createProxyLanguageService, decorateLanguageServiceHost } from '@volar/typescript';
-import { type Language, type SourceScript } from '@vue/language-core';
+import type { Language, SourceScript } from '@vue/language-core';
 import { createAnalyzer } from 'laplacenoma';
 import * as rulesVue from 'laplacenoma/rules/vue';
 import type * as ts from 'typescript';

tsslint.config.ts

@@ -150,5 +150,52 @@ export default defineConfig({
 				ts.forEachChild(node, visit);
 			});
 		},
+		'type-imports'({ typescript: ts, file, report }) {
+			ts.forEachChild(file, function visit(node) {
+				if (
+					ts.isImportDeclaration(node)
+					&& node.importClause
+					&& node.importClause.namedBindings
+					&& node.importClause.phaseModifier !== ts.SyntaxKind.TypeKeyword
+					&& !node.importClause.name
+					&& !ts.isNamespaceImport(node.importClause.namedBindings)
+					&& node.importClause.namedBindings.elements.every(e => e.isTypeOnly)
+				) {
+					const typeElements = node.importClause.namedBindings.elements;
+					report(
+						'This import statement should use type-only import.',
+						node.getStart(file),
+						node.getEnd(),
+					).withFix(
+						'Replace inline type imports with a type-only import.',
+						() => [
+							{
+								fileName: file.fileName,
+								textChanges: [
+									...typeElements.map(element => {
+										const token = element.getFirstToken(file)!;
+										return {
+											newText: '',
+											span: {
+												start: token.getStart(file),
+												length: element.name.getStart(file) - token.getStart(file),
+											},
+										};
+									}),
+									{
+										newText: 'type ',
+										span: {
+											start: node.importClause!.getStart(file),
+											length: 0,
+										},
+									},
+								],
+							},
+						],
+					);
+				}
+				ts.forEachChild(node, visit);
+			});
+		},
 	},
 });