Add setting for verbose option of Grunt to debug.

[hanfeisun]

When play-yeoman encounters an warning during grunt, it just use --force to skip and continue without displaying any debug information...

   Running "concurrent:test" (concurrent) task

       Running "compass:dist" (compass) task
       Warning: ↑ Used --force, continuing.

       Running "compass:server" (compass) task
       Warning: ↑ Used --force, continuing.

       Done, but with warnings.

It looks like the path of compass can't be found, but providing verbose information here will be very helpful.
Is it possible for play-yeoman to add a setting to enable --verbose option of Grunt?

[Shiti]

Please use disable grunt force, Yeoman.forceGrunt := false (mentioned in configuring)

[hanfeisun]

Thanks.. but would it be possible to provider verbose information using --verbose option of grunt? Currently, even I used forceGrunt I still can't find what's going wrong in compass step easily..

[hanfeisun]

by the way, this error only appears when I deploy the app to Heroku, so it is a tricky to debug..