Can't make grunt-contrib-compass work

Question

So I have the following situation. When I'm using compass just from CLI it just works and does exactly what's required. I'm running compass compile from the same folder where config.rb file is located (in styles folder). It also contains also sass and css directories. Here's my config.rb file:

project_path = '.'
css_dir = "css"
sass_dir = "sass"
images_dir = "../../data/images"
javascripts_dir = "../scripts"

output_style = :compressed
environment = :development
relative_assets = true

When I'm trying to use grunt for this I use the following configuration in Gruntfile.js:

compass: {
    compile: {
        options: {
            basePath: 'app/src/styles',
            config: 'app/src/styles/config.rb'
        }
    }
}

The app folder and Gruntfile.js are located at the same level. When I'm running grunt compass I see the following output:

Running "compass:dist" (compass) task
Nothing to compile. If you're trying to start a new project, you have left off the directory argument.
Run "compass -h" to get help.

Done, without errors.

If I try to specify all the options directly like:

compass: {
    compile: {
        options: {
            basePath: 'app/src/styles',
            sassDir: 'app/src/styles/sass',
            cssDir: 'app/src/styles/css',
            imagesDir: 'app/data/images'
        }
    }
}

It does the job, but the .sass-cache folder is created at the level of Gruntfile.js. So I guess there's some problem with basePath option of the configuration.

Am I doing something wrong?

---

EDIT:
The only way, I managed to make it work, as intended is moving config.rb file to the level of Gruntfile.js, and specifying the following options in it:

project_path = 'app/src/styles'
css_dir = "css"
sass_dir = "sass"
images_dir = "../../data/images"
javascripts_dir = "../scripts"

output_style = :compressed
environment = :development
relative_assets = true

Also I removed all of the options from the 'Gruntfile.js`, which regard to this task. Still not sure, what's going on here.

Answer 1

Try not setting the basePath in the Grunt config, i.e:

compass: {
   compile: {
     options: {
        basePath: 'app/src/styles',
        config: 'app/src/styles/config.rb'
    }
  }
}

Turn into:

compass: {
       compile: {
         options: {
            config: 'app/src/styles/config.rb'
        }
      }
    }

And also run your Grunt Compass with the --verbose switch (grunt compass --verbose) to see what files grunt is trying to process.

Notice that any setting you add to your options in the Grunt file will override (or extend) the settings in your config.rb file.

Check out this page: https://github.com/gruntjs/grunt-contrib-compass to see more info about grunt-contrib-compass. they have info about all the possible options.