// source maps
// npm install --save-dev gulp-sourcemaps 
var gulp = require('gulp');
var concat = require('gulp-concat');
var sourcemaps = require('gulp-sourcemaps');
 
gulp.task('javascript', function() {
  return gulp.src('src/**/*.js')
    .pipe(sourcemaps.init())
      .pipe(concat('all.js'))
    .pipe(sourcemaps.write())
    .pipe(gulp.dest('dist'));
});


 // concat
// npm install --save-dev gulp-concat

// opt 1
var concat = require('gulp-concat');
gulp.task('scripts', function() {
  return gulp.src('./lib/*.js')
    .pipe(concat('all.js'))
    .pipe(gulp.dest('./dist/'));
});


// opt 2
var concat = require('gulp-concat');
 
gulp.task('scripts', function() {
  return gulp.src(['./lib/file3.js', './lib/file1.js', './lib/file2.js'])
    .pipe(concat('all.js'))
    .pipe(gulp.dest('./dist/'));
});


// opt 3
var concat = require('gulp-concat');
 
gulp.task('scripts', function() {
  return gulp.src(['./lib/file3.js', './lib/file1.js', './lib/file2.js'])
    .pipe(concat({ path: 'new.js', stat: { mode: 0666 }}))
    .pipe(gulp.dest('./dist'));
});



 
# npm install --save-dev gulp-nodemon

var gulp = require('gulp')
  , nodemon = require('gulp-nodemon')
  , jshint = require('gulp-jshint')
 
gulp.task('lint', function () {
  gulp.src('./**/*.js')
    .pipe(jshint())
})
 
gulp.task('develop', function () {
  var stream = nodemon({ script: 'server.js'
          , ext: 'html js'
          , ignore: ['ignored.js']
          , tasks: ['lint'] })
 
  stream
      .on('restart', function () {
        console.log('restarted!')
      })
      .on('crash', function() {
        console.error('Application has crashed!\n')
         stream.emit('restart', 10)  // restart the server in 10 seconds 
      })
})



# npm install --save-dev vinyl-elasticsearch
  
var gulp = require('gulp');
var elasticsearch = require('vinyl-elasticsearch');
 
gulp.task('search', function() {
  return elasticsearch.src(
    {
      index: 'someindex',
      size: 0,
      body: {
        // Begin query. 
        query: {
          // Boolean query for matching and excluding items. 
          bool: {
            must: [{match: {'somefield': 'somevalue'}}]
          }
        },
        // Aggregate on the results 
        aggs: {
          actions: {
            terms: {
              field: 'additionalType',
              order: {'_term' : 'asc'},
              size: 10,
            }
          }
        }
      }
    },
    {
      host: 'https://localhost:9200',
      log: 'trace'
    }
  )
    .pipe(echo());
});





# npm install --save-dev gulp-rename

var rename = require("gulp-rename");
 
// rename via string 
gulp.src("./src/main/text/hello.txt")
  .pipe(rename("main/text/ciao/goodbye.md"))
  .pipe(gulp.dest("./dist")); // ./dist/main/text/ciao/goodbye.md 
 
// rename via function 
gulp.src("./src/**/hello.txt")
  .pipe(rename(function (path) {
    path.dirname += "/ciao";
    path.basename += "-goodbye";
    path.extname = ".md"
  }))
  .pipe(gulp.dest("./dist")); // ./dist/main/text/ciao/hello-goodbye.md 
 
// rename via hash 
gulp.src("./src/main/text/hello.txt", { base: process.cwd() })
  .pipe(rename({
    dirname: "main/text/ciao",
    basename: "aloha",
    prefix: "bonjour-",
    suffix: "-hola",
    extname: ".md"
  }))
  .pipe(gulp.dest("./dist")); // ./dist/main/text/ciao/bonjour-aloha-hola.md






# npm install --save-dev del

const del = require('del');
 
del(['tmp/*.js', '!tmp/unicorn.js']).then(paths => {
    console.log('Deleted files and folders:\n', paths.join('\n'));
});

// OR
del.sync(['public/assets/**', '!public/assets/goat.png']);





# npm install --save-dev gulp-uglify

var gulp = require('gulp');
var uglify = require('gulp-uglify');
var pump = require('pump');
 
gulp.task('compress', function (cb) {
  pump([
        gulp.src('lib/*.js'),
        uglify(),
        gulp.dest('dist')
    ],
    cb
  );
});



# npm install --save-dev gulp-if

var gulpif = require('gulp-if');
var uglify = require('gulp-uglify');
 
var condition = true; // TODO: add business logic 
 
gulp.task('task', function() {
  gulp.src('./src/*.js')
    .pipe(gulpif(condition, uglify()))
    .pipe(gulp.dest('./dist/'));
});

// OR Ternary
var gulpif = require('gulp-if');
var uglify = require('gulp-uglify');
var beautify = require('gulp-beautify');
 
var condition = function (file) {
  // TODO: add business logic 
  return true;
}
 
gulp.task('task', function() {
  gulp.src('./src/*.js')
    .pipe(gulpif(condition, uglify(), beautify()))
    .pipe(gulp.dest('./dist/'));
});





# npm install --save-dev gulp-git

var gulp = require('gulp');
var git = require('gulp-git');
 
// Run git init 
// src is the root folder for git to initialize 
gulp.task('init', function(){
  git.init(function (err) {
    if (err) throw err;
  });
});
 
// Run git init with options 
gulp.task('init', function(){
  git.init({args: '--quiet --bare'}, function (err) {
    if (err) throw err;
  });
});
 
// Run git add 
// src is the file(s) to add (or ./*) 
gulp.task('add', function(){
  return gulp.src('./git-test/*')
    .pipe(git.add());
});
 
// Run git add with options 
gulp.task('add', function(){
  return gulp.src('./git-test/*')
    .pipe(git.add({args: '-f -i -p'}));
});
 
// Run git commit 
// src are the files to commit (or ./*) 
gulp.task('commit', function(){
  return gulp.src('./git-test/*')
    .pipe(git.commit('initial commit'));
});
 
// Run git commit with options 
gulp.task('commit', function(){
  return gulp.src('./git-test/*')
    .pipe(git.commit('initial commit', {args: '-A --amend -s'}));
});
 
// Run git commit without checking for a message using raw arguments 
gulp.task('commit', function(){
  return gulp.src('./git-test/*')
    .pipe(git.commit(undefined, {
      args: '-m "initial commit"',
      disableMessageRequirement: true
    }));
});
 
// Run git commit without appending a path to the commits 
gulp.task('commit', function(){
  return gulp.src('./git-test/*')
    .pipe(git.commit('initial commit', {
      disableAppendPaths: true
    }));
});
 
// Run git commit, passing multiple messages as if calling 
// git commit -m "initial commit" -m "additional message" 
gulp.task('commit', function(){
  return gulp.src('./git-test/*')
    .pipe(git.commit(['initial commit', 'additional message']));
});
 
// Run git commit, emiting 'data' event during progress 
// This is useful when you have long running githooks 
// and want to show progress to your users on screen 
gulp.task('commit', function(){
  return gulp.src('./git-test/*')
    .pipe(git.commit('initial commit', {emitData:true}))
    .on('data',function(data) {
      console.log(data);
    });
});
 
// Run git remote add 
// remote is the remote repo 
// repo is the https url of the repo 
gulp.task('addremote', function(){
  git.addRemote('origin', 'https://github.com/stevelacy/git-test', function (err) {
    if (err) throw err;
  });
});
 
// Run git remote remove 
// remote is the remote repo 
gulp.task('removeremote', function(){
  git.removeRemote('origin', function (err) {
    if (err) throw err;
  });
});
 
// Run git push 
// remote is the remote repo 
// branch is the remote branch to push to 
gulp.task('push', function(){
  git.push('origin', 'master', function (err) {
    if (err) throw err;
  });
});
 
// Run git push with options 
// branch is the remote branch to push to 
gulp.task('push', function(){
  git.push('origin', 'master', {args: " -f"}, function (err) {
    if (err) throw err;
  });
});
 
// Run git push with multiple branches and tags 
gulp.task('push', function(){
  git.push('origin', ['master', 'develop'], {args: " --tags"}, function (err) {
    if (err) throw err;
  });
});
 
// Run git pull 
// remote is the remote repo 
// branch is the remote branch to pull from 
gulp.task('pull', function(){
  git.pull('origin', 'master', {args: '--rebase'}, function (err) {
    if (err) throw err;
  });
});
 
// Run git pull from multiple branches 
gulp.task('pull', function(){
  git.pull('origin', ['master', 'develop'], function (err) {
    if (err) throw err;
  });
});
 
// Run git fetch 
// Fetch refs from all remotes 
gulp.task('fetch', function(){
  git.fetch('', '', {args: '--all'}, function (err) {
    if (err) throw err;
  });
});
 
// Run git fetch 
// Fetch refs from origin 
gulp.task('fetch', function(){
  git.fetch('origin', '', function (err) {
    if (err) throw err;
  });
});
 
// Clone a remote repo 
gulp.task('clone', function(){
  git.clone('https://github.com/stevelacy/gulp-git', function (err) {
    if (err) throw err;
  });
});
 
// Clone remote repo to sub folder ($CWD/sub/folder/git-test) 
gulp.task('clonesub', function() {
  git.clone('https://github.com/stevelacy/git-test', {args: './sub/folder'}, function(err) {
    // handle err 
  });
});
 
// Tag the repo with a version 
gulp.task('tag', function(){
  git.tag('v1.1.1', 'Version message', function (err) {
    if (err) throw err;
  });
});
 
// Tag the repo with a version and empty message 
gulp.task('tag', function(){
  git.tag('v1.1.1', '', function (err) {
    if (err) throw err;
  });
});
 
// Tag the repo With signed key 
gulp.task('tagsec', function(){
  git.tag('v1.1.1', 'Version message with signed key', {signed: true}, function (err) {
    if (err) throw err;
  });
});
 
// Create a git branch 
gulp.task('branch', function(){
  git.branch('newBranch', function (err) {
    if (err) throw err;
  });
});
 
// Checkout a git branch 
gulp.task('checkout', function(){
  git.checkout('branchName', function (err) {
    if (err) throw err;
  });
});
 
// Create and switch to a git branch 
gulp.task('checkout', function(){
  git.checkout('branchName', {args:'-b'}, function (err) {
    if (err) throw err;
  });
});
 
// Merge branches to master 
gulp.task('merge', function(){
  git.merge('branchName', function (err) {
    if (err) throw err;
  });
});
 
// Reset a commit 
gulp.task('reset', function(){
  git.reset('SHA', function (err) {
    if (err) throw err;
  });
});
 
// Git rm a file or folder 
gulp.task('rm', function(){
  return gulp.src('./gruntfile.js')
    .pipe(git.rm());
});
 
gulp.task('addSubmodule', function(){
  git.addSubmodule('https://github.com/stevelacy/git-test', 'git-test', { args: '-b master'});
});
 
gulp.task('updateSubmodules', function(){
  git.updateSubmodule({ args: '--init' });
});
 
// Working tree status 
gulp.task('status', function(){
  git.status({args: '--porcelain'}, function (err, stdout) {
    if (err) throw err;
  });
});
 
// Other actions that do not require a Vinyl 
gulp.task('log', function(){
  git.exec({args : 'log --follow index.js'}, function (err, stdout) {
    if (err) throw err;
  });
});
 
// Git clean files 
gulp.task('clean', function() {
  git.clean({ args: '-f' }, function (err) {
    if(err) throw err;
  });
});
 
// Run gulp's default task 
gulp.task('default',['add']);






# npm install --save-dev yargs

// short.js
var argv = require('yargs').argv;
console.log('(%d,%d)', argv.x, argv.y);

//call
// $ ./short.js -x 10 -y 21
//(10,21)




# npm install --save-dev gulp-size

const gulp = require('gulp');
const size = require('gulp-size');
 
gulp.task('default', () =>
    gulp.src('fixture.js')
        .pipe(size())
        .pipe(gulp.dest('dist'))
);








# npm install --save-dev gulp-notify

gulp.task("one", function () {
  return gulp.src("../test/fixtures/1.txt")
      .pipe(notify());
});

notify.on('click', function (options) {
  console.log('I clicked something!', options);
});

gulp.task("click", function () {
  // Click event only makes sense if wait is true...
  return gulp.src("../test/fixtures/1.txt")
      .pipe(notify({ message: 'Hello 1', wait: true }));
});

gulp.task("message", function () {
  return gulp.src("../test/fixtures/1.txt")
      .pipe(notify("This is a message."));
});

gulp.task("advanced", function () {
  return gulp.src("../test/fixtures/*")
      .pipe(notify({
        "title": "Open Github",
        "subtitle": "Project web site",
        "message": "Click to open project site",
        "sound": "Frog", // case sensitive
        "icon": path.join(__dirname, "gulp.png"), // case sensitive
        "onLast": true,
        "wait": true
      }));
});

gulp.task("error", function () {
  return gulp.src("../test/fixtures/*")
      .pipe(through.obj(function (file, enc, callback) {
        this.emit("error", new Error("Something happend: Error message!"));
        callback();
      }))
      .on("error", notify.onError({
        message: 'Error: <%= error.message %>',
        sound: false // deactivate sound?
      }))
      .on("error", function (err) {
        console.log("Error:", err);
      })
});

gulp.task("forceGrowl", function () {
  var custom = notify.withReporter(function (options, callback) {
    new nn.Growl().notify(options, callback);
});