Get latest arena files

gulpfile.js

var gulp = require('gulp');
var git = require('git-tools');
var tap = require('gulp-tap');
var path = require('path');
var del = require('del');
var Promise = require('es6-promise').Promise;

var latest = '';

gulp.task('arena', ['get:arenaversion'], function () {
    return gulp.src(path.join('./tmp/castor/sets/arena', latest, '**/*'))
        .pipe(gulp.dest(path.join('app/arena', latest)));
});

gulp.task('get:arenaversion', ['clone:castor'], function () {
    return gulp.src('./tmp/castor/src/arena/.semver')
        .pipe(tap(function(file) {
            latest = file.contents.toString();
        }));
});

gulp.task('clone:castor', ['clean:tmp'], function(){
    return new Promise(function(resolve, reject) {
        git.clone({
            repo: 'ssh://[email protected]/amedia/castor',
            dir: 'tmp/castor'
        }, function(error, repo) {
            if (error) {
                reject(error)
            } else {
                resolve(repo)
            }
        })
    });
});

gulp.task('clean:tmp', function(cb) {
    del([
        'tmp/**'
    ], cb);
});

package.json

{
  "devDependencies": {
    "del": "^0.1.3",
    "es6-promise": "^1.0.0",
    "git-tools": "^0.1.1",
    "gulp": "~3.8.7",
    "gulp-tap": "^0.1.3",
  }
}