gulpfile.js

var gulp = require('gulp');
var less = require('gulp-less');
var _ = require('underscore');

var paths = {
    sources: {
        less: 'app/assets/less/**/*.less'
    },
    dests: {
        js: 'public/js',
        css: 'public/css',
        fonts: 'public/fonts'
    }
};

var vendors = {
    bootstrap: {
        path: 'public/bower_components/bootstrap/dist',
        sourceDirs: {
            js: ['bootstrap.js'],
            css: ['bootstrap.css'],
            fonts: [
                'glyphicons-halflings-regular.eot',
                'glyphicons-halflings-regular.svg',
                'glyphicons-halflings-regular.ttf',
                'glyphicons-halflings-regular.woff'
            ]
        }
    },
    jquery: {
        path: 'public/bower_components/jquery/dist',
        sources: ['jquery.js'],
        dest: paths.dests.js,
    }
};

// build out the projects own .less source
gulp.task('less', function() {
    gulp.src(paths.sources.less)
        .pipe(less())
        .pipe(gulp.dest(paths.dests.css));
});

gulp.task('vendor-assets', function() {
   var move = function (source, dest) {
        console.log('moving ' + source + ' to ' + dest);
        gulp.src(source).pipe(gulp.dest(dest));
    },
    processVendor = function(config) {
        if (config.sources) {
            processVendorSources(config.path, config.sources, config.dest);
        } else if (config.sourceDirs) {
            _.each(config.sourceDirs, processVendorDirectories(config.path));
        } else {
            throw new Error("Fuck");
        }
    },
    processVendorSources = function (basePath, sources, destination) {
        for (var i = 0; i < sources.length; i++) {
            var source = basePath + '/' +  sources[i];
            move(source, destination);
        }
    },
    processVendorDirectories = function (basePath) {
        return function (sources, sourceType) {
            var path = basePath + '/' + sourceType,
            destination = paths.dests[sourceType];
            processVendorSources(path, sources, destination);
        };
    };
    _.each(vendors, processVendor);
});

gulp.task('watch', function() {
    gulp.watch(paths.sources.less, ['less']);
});

gulp.task('default', function() {
    console.log("hello world!");
});