fix(fmt): error when no files match

packages/rstack/src/fmt/cli.ts

@@ -243,9 +243,11 @@ const runFmtCLI = async (args: string[]): Promise<void> => {
     });
 
     if (files.length === 0) {
-      if (mode !== 'list-different') {
-        logger.info('No files matched.');
-      }
+      const targets = (patterns.length ? patterns : ['.'])
+        .map((pattern) => color.cyan(JSON.stringify(pattern)))
+        .join(', ');
+      logger.error(`No supported files matched ${targets}, or all matching files were ignored.`);
+      process.exitCode = 2;
       return;
     }
 

packages/rstack/tests/cli/fmt/index.test.ts

@@ -585,16 +585,15 @@ test('writes nothing for empty stdin', () => {
   expect(result.stderr).toBe('');
 });
 
-test('reports when no files match', () => {
-  const writeResult = runFmt(['missing/**/*.ts']);
+test('returns exit code 2 when no files match', () => {
+  for (const modeArgs of [[], ['--check'], ['--list-different']]) {
+    const result = runFmt([...modeArgs, 'missing/**/*.ts']);
 
-  expect(writeResult.status).toBe(0);
-  expect(writeResult.stdout).toBe('info    No files matched.\n');
-  expect(writeResult.stderr).toBe('');
-
-  const checkResult = runFmt(['--check', 'missing/**/*.ts']);
-
-  expect(checkResult.status).toBe(0);
-  expect(checkResult.stdout).toBe('info    No files matched.\n');
-  expect(checkResult.stderr).toBe('');
+    expect(result.status).toBe(2);
+    expect(result.stdout).toBe('');
+    expect(result.stderr).toContain(
+      'No supported files matched "missing/**/*.ts", or all matching files were ignored.',
+    );
+    expect(result.stderr).not.toContain('\n    at ');
+  }
 });