feat: 🎸 support markup preprocessing with no tags

Author: kaisermann

src/autoProcess.ts

@@ -47,6 +47,7 @@ type AutoPreprocessOptions = {
   pug?: TransformerOptions<Options.Pug>;
   globalStyle?: Options.GlobalStyle | boolean;
   replace?: Options.Replace;
+
   // workaround while we don't have this
   // https://github.com/microsoft/TypeScript/issues/17867
   [languageName: string]:
@@ -212,7 +213,7 @@ export function autoPreprocess(
 
     /** If no <template> was found, just return the original markup */
     if (!templateMatch) {
-      return { code: content };
+      return markupTransformer({ content, attributes: {}, filename });
     }
 
     const [fullMatch, attributesStr, templateCode] = templateMatch;

test/autoProcess/autoProcess.test.ts

@@ -186,4 +186,21 @@ describe('options', () => {
       '<script lang="tomatoScript">tomato</script>',
     );
   });
+
+  it('should be able to use default markup language with template tags', async () => {
+    const input = `potato`;
+
+    const opts = autoPreprocess({
+      defaults: {
+        markup: 'potatoScript',
+      },
+      potatoScript({ content }) {
+        return { code: content.replace('potato', 'french-fries') };
+      },
+    });
+
+    const preprocessed = await preprocess(input, opts);
+
+    expect(preprocessed.toString()).toContain('french-fries');
+  });
 });