feat(utils): add parser name to thrown parser error message

packages/utils/src/eslint-utils/getParserServices.ts

@@ -91,14 +91,14 @@ function getParserServices(
 /* eslint-enable @typescript-eslint/unified-signatures */
 
 function throwError(parserPath: string): never {
-  throw new Error(
-    parserPathSeemsToBeTSESLint(parserPath)
-      ? ERROR_MESSAGE_REQUIRES_PARSER_SERVICES
-      : [
-          ERROR_MESSAGE_REQUIRES_PARSER_SERVICES,
-          ERROR_MESSAGE_UNKNOWN_PARSER,
-        ].join('\n'),
-  );
+  const messages = [
+    ERROR_MESSAGE_REQUIRES_PARSER_SERVICES,
+    `Parser: ${parserPath}`,
+  ];
+  if (!parserPathSeemsToBeTSESLint(parserPath)) {
+    messages.push(ERROR_MESSAGE_UNKNOWN_PARSER);
+  }
+  throw new Error(messages.join('\n'));
 }
 
 export { getParserServices };

packages/utils/tests/eslint-utils/getParserServices.test.ts

@@ -26,6 +26,16 @@ const createMockRuleContext = (
   }) as unknown as UnknownRuleContext;
 
 describe('getParserServices', () => {
+  const requiresParserServicesMessageTemplate =
+    'You have used a rule which requires parserServices to be generated. You must therefore provide a value for the "parserOptions.project" property for @typescript-eslint/parser.\n' +
+    'Parser: \\S*';
+  const baseErrorRegex = new RegExp(requiresParserServicesMessageTemplate);
+  const unknownParserErrorRegex = new RegExp(
+    requiresParserServicesMessageTemplate +
+      '\n' +
+      'Note: detected a parser other than @typescript-eslint/parser. Make sure the parser is configured to forward "parserOptions.project" to @typescript-eslint/parser.',
+  );
+
   it('throws a standard error when parserOptions.esTreeNodeToTSNodeMap is missing and the parser is known', () => {
     const context = createMockRuleContext({
       sourceCode: {
@@ -38,9 +48,7 @@ describe('getParserServices', () => {
     });
 
     expect(() => ESLintUtils.getParserServices(context)).toThrow(
-      new Error(
-        'You have used a rule which requires parserServices to be generated. You must therefore provide a value for the "parserOptions.project" property for @typescript-eslint/parser.',
-      ),
+      baseErrorRegex,
     );
   });
 
@@ -55,12 +63,8 @@ describe('getParserServices', () => {
         },
       },
     });
-
     expect(() => ESLintUtils.getParserServices(context)).toThrow(
-      new Error(
-        'You have used a rule which requires parserServices to be generated. You must therefore provide a value for the "parserOptions.project" property for @typescript-eslint/parser.\n' +
-          'Note: detected a parser other than @typescript-eslint/parser. Make sure the parser is configured to forward "parserOptions.project" to @typescript-eslint/parser.',
-      ),
+      unknownParserErrorRegex,
     );
   });
 
@@ -76,9 +80,7 @@ describe('getParserServices', () => {
     });
 
     expect(() => ESLintUtils.getParserServices(context)).toThrow(
-      new Error(
-        'You have used a rule which requires parserServices to be generated. You must therefore provide a value for the "parserOptions.project" property for @typescript-eslint/parser.',
-      ),
+      baseErrorRegex,
     );
   });
 
@@ -94,9 +96,7 @@ describe('getParserServices', () => {
     });
 
     expect(() => ESLintUtils.getParserServices(context)).toThrow(
-      new Error(
-        'You have used a rule which requires parserServices to be generated. You must therefore provide a value for the "parserOptions.project" property for @typescript-eslint/parser.',
-      ),
+      baseErrorRegex,
     );
   });