gruntfile.js

// Gruntfile.js
module.exports = function(grunt) {
  grunt.initConfig({
    pkg: grunt.file.readJSON('package.json'),

    /*
     =====================================================================================================================================
     start of watch
     =====================================================================================================================================
     *
     */

    watch: {
      content: {
        files: ['_site/**/*.*'],
        tasks: ['newer:htmlmin'],
        options: {
          livereload: false,
          spawn: false
        }
      },
      images: {
        files: ['images-src/**/*.*'],
        tasks: ['newer:imagemin']
      }, // watch images added to src
      css: {
        files: ['sass/**/*.scss'],
        tasks: ['sass', 'postcss'],
        options: {
          spawn: false,
        }
      },

      scripts: {
        files: ['js/libs/*.js', 'js/custom/*.js'],
        tasks: ['concat', 'uglify'],
        options: {
          livereload: true,
          spawn: true,
        }
      },

      scriptsIndex: {
        files: ['js/index-js/index.js'],
        tasks: ['uglify:scriptsIndex'],
        options: {
          spawn: false,
        },
      },
    },

    /*
     =====================================================================================================================================
     end of watch
     =====================================================================================================================================
     *
     */

    sass: {
      dist: {
        options: {
          compass: true,
          require: 'susy',
        },

        files: {
          'css/main.css': ['sass/*.scss', 'sass/partials/*.scss'],
          '_site/css/main.css': ['sass/*.scss', 'sass/partials/*.scss']
        }
      }
    }, // sass

    imagemin: {
      dynamic: {
        files: [{
          expand: true, // Enable dynamic expansion
          cwd: 'images-src/', // Src matches are relative to this path
          src: ['**/*.{png,jpg,gif,svg}'], // Actual patterns to match
          dest: 'images/' // Destination path prefix
        }]
      }
    }, // imagemin

    postcss: {
      options: {
        map: true,
        processors: [require('autoprefixer')({
            browsers: 'last 2 version, IE 9'
          }), // add vendor prefixes. for more: https://github.com/ai/browserslist
          require('cssnano')() // minify the result
        ]
      },
      dist: {
        src: 'css/main.css'
      }
    },

    concat: {
      dist: {
        src: ['js/libs/*.js', 'js/custom/*.js'],
        dest: 'js/build/production.js'
      }
    }, // concat

    uglify: {
      dist: {
        src: 'js/build/production.js',
        dest: 'js/production.min.js'
      },
      scriptsIndex: {
        src: 'js/index-js/index.js',
        dest: 'js/index.min.js'
      }
    }, // uglify

    htmlmin: {
      dist: {
        options: {
          removeComments: true,
          removeRedundantAttributes: true,
          useShortDoctype: true,
          collapseWhitespace: true
        },
        expand: true,
        cwd: '_site/',
        src: ['**/*.html'],
        dest: '_site/'
      }
    }, // htmlmin

    browserSync: {
      dev: {
        bsFiles: {
          src: ['_site/**/*.*']
        },
        options: {
          proxy: "localhost:4000",
          watchTask: true
        }
      }
    }, //browserSync

    ftpush: {
      build: {
        auth: {
          host: 'ftp.valeriopierbattista.com',
          port: 21,
          authKey: 'key1'
        },
        src: './',
        dest: '/www',
        //exclusions : ['.sass-cache', '.git', 'images/src', 'node_modules', '.ftppass', '.gitignore', 'gruntfile.js', 'README.md', 'php', 'package.json', 'sass', '_PSD'],
        keep: ['cv', 'projects'],
        simple: false,
        useList: false
      }
    }
  });

  grunt.loadNpmTasks('grunt-contrib-watch');
  grunt.loadNpmTasks('grunt-browser-sync');
  grunt.loadNpmTasks('grunt-contrib-sass');
  grunt.loadNpmTasks('grunt-postcss');
  grunt.loadNpmTasks('grunt-contrib-imagemin');
  grunt.loadNpmTasks('grunt-newer');
  grunt.loadNpmTasks('grunt-contrib-concat');
  grunt.loadNpmTasks('grunt-contrib-uglify');
  grunt.loadNpmTasks('grunt-contrib-htmlmin');
  grunt.loadNpmTasks('grunt-ftpush');

  grunt.registerTask('default', ['browserSync', 'watch']);
};