Bail out early without a command in Yarn resolver (resolves #979)

Author: webpro

packages/knip/src/binaries/package-manager/yarn.ts

@@ -61,6 +61,8 @@ export const resolve: BinaryResolver = (_binary, args, options) => {
   const dir = parsed['top-level'] ? rootCwd : parsed.cwd ? join(cwd, parsed.cwd) : undefined;
   const [command, binary] = parsed._;
 
+  if (!command && !binary) return [];
+
   if (command === 'run') {
     if (manifestScriptNames.has(binary)) return [];
     const bin = toBinary(binary, { optional: true });

packages/knip/test/util/get-inputs-from-scripts.test.ts

@@ -196,6 +196,7 @@ test('getInputsFromScripts (yarn)', () => {
   t('yarn run program', [], pkgScripts);
   t('yarn program', [], pkgScripts);
   t('yarn node script.js', [toBinary('node'), toDeferResolveEntry('script.js')]);
+  t('yarn --mode skip-build', []);
 });
 
 test('getInputsFromScripts (yarn dlx)', () => {