var sort = require('gulp-sort');
// default sort
gulp.src('./src/js/**/*.js')
    .pipe(sort())
    .pipe(gulp.dest('./build/js'));
// pass in a custom comparator function
gulp.src('./src/js/**/*.js')
    .pipe(sort(customComparator))
    .pipe(gulp.dest('./build/js'));
// sort descending
gulp.src('./src/js/**/*.js')
    .pipe(sort({
         asc: false
    }))
    .pipe(gulp.dest('./build/js'));
// sort with a custom comparator
gulp.src('./src/js/**/*.js')
    .pipe(sort({
        comparator: function(file1, file2) {
            if (file1.path.indexOf('build') > -1) {
                return 1;
            }
            if (file2.path.indexOf('build') > -1) {
                return -1;
            }
            return 0;
        }
    }))
    .pipe(gulp.dest('./build/js'));
// sort with a custom sort function
var stable = require('stable');
gulp.src('./src/js/**/*.js')
    .pipe(sort({
        customSortFn: function(files, comparator) {
            return stable(files, comparator);
        }
    }))
    .pipe(gulp.dest('./build/js'));