(function () {
  'use strict';

  // dependencies
  var gulp = require('gulp');
  var concat = require('gulp-concat');
  var uglify = require('gulp-uglify');
  var resolveDependencies = require('gulp-resolve-dependencies');

  // source
  var sources = './lib/*.js';

  gulp.task('build', function () {
    return gulp.src(sources)
      .pipe(resolveDependencies())
      .pipe(concat('clustering.js'))
      .pipe(gulp.dest('./dist'))
    ;
  });

  gulp.task('build-min', ['build'], function () {
    return gulp.src('./dist/clustering.js')
      .pipe(uglify())
      .pipe(concat('clustering.min.js'))
      .pipe(gulp.dest('./dist'))
    ;
  });

  gulp.task('default', ['build-min']);
})();