Extend sails 0.10 grunt set-up - gruntjs

Question

I am intending to add a task to sails's (0.10 rc5) grunt build system.
tasks/config/asset-versioning.js
module.exports = function(grunt) {
grunt.config.set('asset-versioning', {
copy: {
src: '.tmp/public/min/production.js',
dest: '.tmp/public/min/production2.js'
}
});
grunt.task.registerTask('asset-versioning', ['copy']);
grunt.loadNpmTasks('grunt-contrib-copy');
};
tasks/register/prod.js
module.exports = function (grunt) {
grunt.registerTask('prod', [
'compileAssets',
'concat',
'uglify',
'cssmin',
'sails-linker:prodJs',
'sails-linker:prodStyles',
'sails-linker:devTpl',
'asset-versioning' // Added the task config here
]);
};
After running sails lift --prod --verbose I am getting following error:
Grunt :: Warning: Task "asset-versioning" not found.
** Grunt :: An error occurred. **
What am I missing?
EDIT
Apparently I am missing to register my task.
Adding grunt.task.registerTask('asset-versioning'); to the first file. I am not getting any error, but my task is not running! Nothing is happening.

Answer 1

Okay, you're having this all mixed up. Copy is a predefined task, you just need to tweak its configs. Go to tasks/config/copy.js and add your custom configuration (in the grunt.config.set call)
productionfiles: {
src: '.tmp/public/min/production.min.js',
dest: '.tmp/public/min/production2.min.js'
}
Then, in the tasks/register/prod.js, make sure you call copy:productionfiles, and it will do the magic.
Copy.js
module.exports = function(grunt) {
grunt.config.set('copy', {
dev: {
files: [{
expand: true,
cwd: './assets',
src: ['**/*.!(coffee|less)'],
dest: '.tmp/public'
}]
},
build: {
files: [{
expand: true,
cwd: '.tmp/public',
src: ['**/*'],
dest: 'www'
}]
},
productionfiles: {
src: '.tmp/public/min/production.min.js',
dest: '.tmp/public/min/production2.min.js'
}
});
grunt.loadNpmTasks('grunt-contrib-copy');
};
Prod.js
module.exports = function (grunt) {
grunt.registerTask('prod', [
'compileAssets',
'concat',
'uglify',
'cssmin',
'sails-linker:prodJs',
'sails-linker:prodStyles',
'sails-linker:devTpl',
'sails-linker:prodJsJade',
'sails-linker:prodStylesJade',
'sails-linker:devTplJade',
'copy:productionfiles'
]);
};