Skip URL imports in the SCSS compiler (#2289)

Author: gioboa

packages/knip/src/compilers/scss.ts

@@ -1,5 +1,6 @@
 import { getUrlSpecifier, isScopedPackage, isTildePackage, splitSpec } from './shared.ts';
 import type { CompilerSync } from './types.ts';
+import { hasUrlScheme } from '../util/url.ts';
 
 // https://sass-lang.com/documentation/at-rules/
 
@@ -35,7 +36,7 @@ export const compiler: CompilerSync = text => {
       continue;
     }
     let spec = match[2];
-    if (!spec || spec.startsWith('sass:')) continue;
+    if (!spec || spec.startsWith('//') || hasUrlScheme(spec)) continue;
     let isBare = Boolean(match[1]) || isScopedPackage(spec);
     if (isTildePackage(spec)) {
       spec = spec.slice(1);

packages/knip/test/compilers/scss-url.test.ts

@@ -32,3 +32,19 @@ import _$3 from './query.jpg';
 import _$4 from '@fontsource-variable/archivo/files/archivo.woff2';`
   );
 });
+
+test('Skip SCSS imports with a URL scheme', () => {
+  const scss = `@import 'https://fonts.googleapis.com/css2?family=Roboto';
+@import '//fonts.googleapis.com/css2?family=Roboto';
+@import "http://example.com/a.css";
+@use 'sass:math';
+@import './local';`;
+
+  assert.equal(
+    compiler(scss, 'styles.scss'),
+    `import _$0 from './local.scss';
+import _$1 from './_local.scss';
+import _$2 from './local.sass';
+import _$3 from './_local.sass';`
+  );
+});