How do I run grunt from a different folder than my root project

Question

Is there a way to tell grunt which grunt.js file to use?

I have an f:\\a\\b\\tools folder that contains grunt.cmd, node.exe,..., my actual web

Answer 1

I'll advise you to run it from your app directory because the modules are installed into nodes_modules, etc. you must move to your app directory and run grunt:

cd f:
cd  a\c\my_app
grunt {yourTasks}