gulfile.js

var gulp = require('gulp'),
    uglify = require('gulp-uglify'),
    concat = require('gulp-concat'),
    watch = require('gulp-watch'),
    sass = require('gulp-sass'),
    //less = require('gulp-less'),
    minifyCSS = require('gulp-minify-css'),
    rename = require('gulp-rename'),
    gutil = require('gulp-util'),
    jslint = require('gulp-jslint-simple'),
    //jshint = require('gulp-jshint');
    //jslint = require('gulp-jslint');
    coveralls = require('gulp-coveralls');


gulp.task('jslint', function () {
    gulp.src([
        'app/js/*.js',          //include
        '!node_modules/**/*.js' //exclude
    ])
    .pipe(jslint.run({
        node: true,
        nomen: true,
        vars: true,
        unparam: true,
        errorsOnly: false
    }))
    .pipe(jslint.report({
        reporter: require('jshint-stylish').reporter
    }));
});

gulp.task('coveralls', function() {
    gulp.src('./test/coverage/**/lcov.info')
      .pipe(coveralls());
});

//uglify
gulp.task('compressjs', function() {
    gulp.src(
        [
            'app/js/*.js',
            '!app/js/*.min.js'
        ]
    )
    .pipe(uglify())
    .pipe(concat('scripts.min.js'))
    .pipe(gulp.dest('static/js/'));
});

//css
gulp.task('scss', function () {
  gulp.src('css/*.scss')
    .pipe(sass().on('error', sass.logError))
    .pipe(gulp.dest('css/'));
});
//concatcss
gulp.task('concatcss', function() {
  return gulp.src([
        'css/style.css',
        'css/semantic-ui/semantic.min.css'
    ])
    .pipe(concat('styles.min.css'))
    .pipe(gulp.dest('static/css/'));
});


/**********tasks***********/

gulp.task('css', ['scss', 'concatcss']);
gulp.task('js', ['compressjs']);

gulp.task('build', ['css', 'js']);

//watch
gulp.task('watch', ['js', 'css', 'coveralls'], function () {

    //css
    gulp.watch([
        "./css/**/*.css",
        "./css/**/*.scss",
        "./css/**/*.less"
    ], ['css']);

    //js
    gulp.watch(["./app/js/*.js"], ['js']);

    //coveralls code coverage reporting
    gulp.watch(["./test/coverage/**/lcov.info"], ['coveralls']);

});//gulp.task('watch'