add linting (and some initial fixes)

1 files changed, 5 insertions, 0 deletions

diff --git a/node_modules/has-yarn/index.js b/node_modules/has-yarn/index.js
new file mode 100644
index 000000000..f7ff13dbd
--- /dev/null
+++ b/node_modules/has-yarn/index.js
@@ -0,0 +1,5 @@
+'use strict';
+const path = require('path');
+const fs = require('fs');
+
+module.exports = cwd => fs.existsSync(path.resolve(cwd || process.cwd(), 'yarn.lock'));