r3-legacy/gulpfile.js

var gulp        = require('gulp');
var concat      = require('gulp-concat');
var sort        = require('gulp-sort');
var minify      = require('gulp-minify');

gulp.task(
    'build',
    function() {
        return gulp.src('./src/game-lib-*.js')
            .pipe(sort())
            .pipe(concat('game-lib.js'))
            .pipe(minify({
                ext:{
                    src:'.js',
                    min:'-min.js'
                }
            }))
            .pipe(gulp.dest('./build/'));
    }
);

gulp.task(
    'default',
    ['build'],
    function() {}
);