the current version of this plugin seems to haven an error in this section of the FontAwesomePluginResources.groovy:
'font-awesome-css' {
defaultBundle configDefaultBundle
resource id: 'font-awesome-css',
url: [plugin: 'font-awesome-resources',
dir : 'css/font-awesome',
file : cssFile],
disposition: 'head',
exclude: 'minify'
}
there is no 'font-awesome' directory so the file is not found. Even if the file would be in that directory all the relative path's used there would not work.
To make it work i had to re-define the 'font-awesome-css' resouce in my ApplicationResources like this:
'font-awesome-css' {
resource id: 'font-awesome-css',
url: [plugin: 'font-awesome-resources',
dir : 'css',
file : 'font-awesome.css'],
disposition: 'head',
exclude: 'minify'
}