Merge pull request #1970 from patricklx/patch-1

add explanation comments

Author: NullVoxPopuli

lib/preprocessors/noop.js

@@ -1,3 +1,12 @@
+/**
+ * this preprocessor validates if eslint if configured correctly so that gjs/gts are correctly processed by our parser
+ * this preprocessor is setup by our recommended rules for gjs/gts, so it will always be called for it
+ * the flow is the following:
+ *  1. gjs/gts files goes through our parses, which calls registerParsedFile, if its not correctly setup, registerParsedFile will not be called
+ *  2. postprocess checks if the file is registered and if not throws an error (only if parsing failed)
+ *
+ */
+
 const parsedFiles = new Set();
 
 module.exports = {