Package files by folder with gulp

gulpfile.js

gulp.task('build-dev-templates5', function() {
    var mergeStream = require('merge-stream');
    var fs = require('fs');

    var amdModulePrefix = 'define(["ember"], function(Ember) {',
        amdModulePostfix = '});';


    var directoryFilter = $.filter(function (file) { return file.isDirectory(); });

    var dFilter2 = fs.readdirSync(paths.src.common + '/templates').filter(function(name) {
        return fs.statSync(paths.src.common + '/templates/' + name).isDirectory();
    });

    dFilter2.push('.');

    var streams = dFilter2.map(function(name) {

        var srcGlob = name==='.'?'*.hbs':(name + '/**/*.hbs');
        var dst = name==='.'?'common':name;
        var rightPath = name==='.'?'':dst + '/';

        var renameToRightPath = $.rename(function(path) { path.dirname = rightPath + path.dirname; });

        return gulp.src(paths.src.common + '/templates/' + srcGlob)
            .pipe($.plumber())
            .pipe(renameToRightPath)
             //.pipe($.filter(function(f) { console.log(f); }))
            .pipe($.emberTemplates({
                type: 'browser'
            }))
            .pipe($.concat(dst + '.js'))
            .pipe($.insert.wrap(amdModulePrefix, amdModulePostfix))
            .pipe(gulp.dest(paths.dev_dist + '/templates'));
    });

    return mergeStream(streams);
});

Solution to http://stackoverflow.com/questions/24767080/package-files-by-folder-with-gulp.