Gulpfile with Livereload, Nodemon, and other features

Gulpfile.js

var gulp        = require('gulp'),
    exec        = require('child_process').exec,
    sass        = require('gulp-ruby-sass'),
    concat      = require('gulp-concat'),
    plumber     = require('gulp-plumber'),
    server      = require('tiny-lr')(),
    refresh     = require('gulp-livereload'),
    mocha       = require('gulp-mocha'),
    notify      = require('gulp-notify'),
    nodemon     = require('gulp-nodemon'),
    jshint      = require('gulp-jshint'),
    lrPort      = 35728;

var paths = {
  styles: ['./public/scss/**/*.scss'],

  scripts: [
    'public/js/**',
    '!public/js/admin',
    '!public/js/admin/**'
  ],
  jade: [
    './app/views/**/*.jade'
  ],

  server: {
    js: ['./app/**/*.js'],
    specs: ['./app/specs/**/*.js']
  }
};

function runCommand(command) {
  return function (cb) {
    exec(command, function (err, stdout, stderr) {
      console.log(stdout);
      console.log(stderr);
      cb(err);
    });
  }
}

//Run mongo
gulp.task('start-mongo', runCommand('mongod'));
gulp.task('stop-mongo', runCommand('mongo --eval "use admin; db.shutdownServer();"'));

gulp.task('sass', function () {
  gulp.src('./public/scss/*.scss')
    .pipe(sass())
    .pipe(gulp.dest('./public/css'))
    .pipe(refresh(server));
});

gulp.task('serve', function(){
  nodemon({'script': 'app.js'});
});

gulp.task('lint', function(){
  return gulp.src(paths.scripts)
    .pipe(plumber())
    .pipe(jshint())
    .pipe(jshint.reporter('default'))
    .pipe(notify({message: 'jshint done'}));
});

gulp.task('scripts', function(){
  return gulp.src(paths.scripts)
    .pipe(plumber())
    .pipe(concat('main.js'))
    .pipe(gulp.dest('./public/dist/client/'))
    .pipe(refresh(server))
    .pipe(notify({message: 'JS concated'}));
});

gulp.task('test', function(){
  return gulp.src(paths.server.specs)
    .pipe(mocha({reporter: 'spec'}))
    .pipe(notify({message: "Specs ran"}));
});

gulp.task('jade', function(){
  return gulp.src(paths.jade)
      .pipe(refresh(server))
      .pipe(notify({message: 'Views refreshed'}));
  // });
});

gulp.task('build', ['sass', 'scripts', 'lint']);

gulp.task('lr', function(){
  server.listen(lrPort, function(err){
    if(err) {return console.error(err);}
  });
});

gulp.task('watch', function(){
  gulp.watch(paths.jade, ['jade']);
  gulp.watch(paths.scripts, ['scripts']);
  gulp.watch(paths.styles, ['sass']);
});

gulp.task('default', ['test', 'build', 'lr', 'serve', 'watch']);
gulp.task('dev', ['start-mongo', 'test', 'build', 'lr', 'serve', 'watch']);