add custom version argument to gulp build

gulpfile.js

@@ -19,6 +19,7 @@ var ngrok = require('ngrok');
 var staticTransform = require('connect-static-transform');
 var privateConfig = require('./test/conf/private.conf.js').config;
 var pkg = require('./package.json');
+var extend = require('util')._extend;
 var server;
 
 gulp.task('release', function(callback) {
@@ -27,10 +28,12 @@ gulp.task('release', function(callback) {
 });
 
 gulp.task('build', function() {
+ build = extend(pkg)
+ build.version = process.argv[4] || pkg.version;
  return gulp.src(pkg.main)
- .pipe(replace("version = 'master'", "version = '" + pkg.version + "'"))
- .pipe(uglify())
- .pipe(header(banner, { pkg: pkg }))
+ .pipe(replace("version = 'master'", "version = '" + build.version + "'"))
+ .pipe(uglify({ output: { max_line_len: 500 } }))
+ .pipe(header(banner, { build: build }))
  .pipe(rename({ suffix: '-min' }))
  .pipe(gulp.dest('.'));
 });
@@ -190,9 +193,9 @@ gulp.task('test:cloud:all', ['lint', 'serve'], function(done) {
 
 var banner = [
  '/*',
- '* <%= pkg.name %> v<%= pkg.version %> by @liabru',
- '* <%= pkg.homepage %>',
- '* License <%= pkg.license %>',
+ '* <%= build.name %> <%= build.version %> by @liabru',
+ '* <%= build.homepage %>',
+ '* License <%= build.license %>',
  '*/',
  ''
 ].join('\n');