gulpfile スタイルガイド - v0.5.0 ref: http://qiita.com/cognitom/items/045c8596a30aa5ab8a47

file0.txt

var gulp       = require('gulp');
var browserify = require('browserify');
var source     = require('vinyl-source-stream');

file1.txt

var gulp       = require('gulp')
   ,browserify = require('browserify')
   ,source     = require('vinyl-source-stream');

file10.txt

var requireDir = require('require-dir');
var dir        = requireDir('./task');

file11.txt

var gulp        = require('gulp');
var del         = require('del');
var runSequence = require('run-sequence');
var requireDir  = require('require-dir');
var dir         = requireDir('./task');

gulp.task('default', function (cb){
  runSequence('clean', 'icon', 'build', cb); // gulp.js 3.xでの書き方
});

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

gulp.task('watch', function(){
  gulp.watch(['src/icon/*.svg'], { debounceDelay: 1000 }, ['icon']);
});

file2.txt

$ gulp --verify

file3.txt

gulp.task('script', function() {
  gulp.src('main.js')
    .pipe(duo())
    .pipe(gulp.dest('dist'))
})

function duo() {
  return map(function(file, cb) {
    Duo(file.base)
      .src(file.contents.toString());
      .run(function(err, src) {
        if (err) return cb(err);
        file.contents = new Buffer(src);
        cb(null, file);
      });
  });
}

file4.txt

var foreach = require('gulp-foreach');

gulp.task('zip', function(){
  return gulp.src('recipe/*')
    .pipe(foreach(function(stream, file){
      return gulp.src(
           path.basename(file.path) + '/**/*',
           { cwd: 'recipe/' }
        )
        .pipe(zip(name + '.zip'));
    }))
    .pipe(gulp.dest('download/'));
});

file5.txt

var merge = require('merge-stream');

var data = [{ name: 'a' }, { name: 'b' }, { name: 'c' }];

gulp.task('page', function(){
  return merge(data.map(function(entry){
    return gulp.src('template.html')
      .pipe(consolidate(entry))
      .pipe(gulp.dest('dist/'));
  }));
});

file6.txt

gulp.task('async', function(){
  return iHaveAPromise();
});

file7.txt

gulp.task('async', function(){
  var deferred = Q.defer();

  setTimeout(function() {
    deferred.resolve();
  }, 1000);

  return deferred.promise;
});

file8.txt

gulp.task('async', function(callback){
  setTimeout(function() {
    callback();
  }, 1000);
});

file9.txt

var meta = require('./package.json');

gulp.task('icon', function(){
  gulp.src('icon/*.svg')
    .pipe(iconfont({ fontName: meta.name })
    .pipe(gulp.dest('dist'));
});