Move shebang skip to readFile

Ast/src/Parser.cpp

@@ -160,9 +160,6 @@ ParseResult Parser::parse(const char* buffer, size_t bufferSize, AstNameTable& n
     {
         std::vector<std::string> hotcomments;
 
-        if (p.lexer.current().type == '#' && p.lexer.lookahead().type == '!')
-            p.lexer.nextline();
-
         while (isComment(p.lexer.current()) || (FFlag::LuauCaptureBrokenCommentSpans && p.lexer.current().type == Lexeme::BrokenComment))
         {
             const char* text = p.lexer.current().data;

CLI/FileUtils.cpp

@@ -67,6 +67,17 @@ std::optional<std::string> readFile(const std::string& name)
     if (read != size_t(length))
         return std::nullopt;
 
+    // Skip first line if it's a comment
+    if (length != 0 && result[0] == '#')
+    {
+        auto newLine = result.find('\n');
+
+        if (newLine != std::string::npos)
+            result.erase(0, newLine);
+        else
+            result.clear();
+    }
+
     return result;
 }