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							/*jshint esversion: 6 */
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							module.exports = function(grunt) {
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							  const path = require('path');
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							  grunt.initConfig({
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							    pkg: grunt.file.readJSON('package.json'),
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							    watch: {
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							      scripts: {
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							        files: ['src/**'],
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							        tasks: ['eslint', 'copy', 'concat', 'uglify', 'less:development', 'less:production']
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							      }
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							    },
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							    eslint: {
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							      options: {
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							        configFile: '.eslintrc.json',
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							        failOnError: false
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							      },
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							      target: [
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							        'src/js/main/*.js',
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							        'src/js/head/*.js',
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							        '../__common__/js/*.js'
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							      ],
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							    },
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							    stylelint: {
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							      options: {
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							        formatter: 'unix',
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							      },
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							      src: [
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							        'src/less/**/*.less',
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							      ]
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							    },
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							    copy: {
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							      js: {
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							        expand: true,
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							        cwd: './node_modules',
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							        dest: './js/',
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							        flatten: true,
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							        filter: 'isFile',
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							        timestamp: true,
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							        src: [
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							          './leaflet/dist/leaflet.js',
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							        ]
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							      },
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							      css: {
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							        expand: true,
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							        cwd: './node_modules',
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							        dest: './css/',
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							        flatten: true,
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							        filter: 'isFile',
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							        timestamp: true,
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							        src: [
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							          './leaflet/dist/leaflet.css',
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							        ]
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							      },
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							      leaflet_images: {
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							        expand: true,
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							        cwd: './node_modules',
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							        dest: './css/images/',
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							        flatten: true,
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							        filter: 'isFile',
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							        timestamp: true,
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							        src: [
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							          './leaflet/dist/images/*.png',
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							        ]
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							      },
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							    },
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							    concat: {
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							      head_and_body: {
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							        options: {
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							          separator: ';'
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							        },
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							        files: {
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							          'js/searxng.head.js': ['src/js/head/*.js'],
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							          'js/searxng.js': ['src/js/main/*.js', '../__common__/js/*.js', './node_modules/autocomplete-js/dist/autocomplete.js']
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							        }
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							      }
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							    },
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							    uglify: {
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							      options: {
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							        output: {
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								        comments: 'some'
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							        },
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							        ie8: false,
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							        warnings: true,
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							        compress: false,
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							        mangle: true,
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							        sourceMap: true
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							      },
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							      dist: {
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							        files: {
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							          'js/searxng.head.min.js': ['js/searxng.head.js'],
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							          'js/searxng.min.js': ['js/searxng.js']
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							        }
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							      }
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							    },
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							    webfont: {
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							      icons: {
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							        // src: 'node_modules/ionicons-npm/src/*.svg',
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							        src: [
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							          'node_modules/ionicons-npm/src/navicon-round.svg',
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							          'node_modules/ionicons-npm/src/search.svg',
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							          'node_modules/ionicons-npm/src/play.svg',
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							          'node_modules/ionicons-npm/src/link.svg',
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							          'node_modules/ionicons-npm/src/chevron-up.svg',
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							          'node_modules/ionicons-npm/src/chevron-left.svg',
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							          'node_modules/ionicons-npm/src/chevron-right.svg',
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							          'node_modules/ionicons-npm/src/arrow-down-a.svg',
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							          'node_modules/ionicons-npm/src/arrow-up-a.svg',
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							          'node_modules/ionicons-npm/src/arrow-swap.svg',
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							          'node_modules/ionicons-npm/src/telephone.svg',
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							          'node_modules/ionicons-npm/src/android-arrow-dropdown.svg',
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							          'node_modules/ionicons-npm/src/android-globe.svg',
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							          'node_modules/ionicons-npm/src/android-time.svg',
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							          'node_modules/ionicons-npm/src/location.svg',
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							          'node_modules/ionicons-npm/src/alert-circled.svg',
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							          'node_modules/ionicons-npm/src/android-alert.svg',
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							          'node_modules/ionicons-npm/src/ios-film-outline.svg',
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							          'node_modules/ionicons-npm/src/music-note.svg',
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							          'node_modules/ionicons-npm/src/ion-close-round.svg',
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							          'node_modules/ionicons-npm/src/android-more-vertical.svg',
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							          'src/fonts/magnet.svg',
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							          'node_modules/ionicons-npm/src/android-close.svg',
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							        ],
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							        dest: 'fonts',
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							        destLess: 'src/generated',
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							        options: {
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							          font: 'ion',
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							          hashes : true,
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							          syntax: 'bem',
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							          styles : 'font,icon',
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							          types : 'eot,woff2,woff,ttf,svg',
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							          order : 'eot,woff2,woff,ttf,svg',
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							          stylesheets : ['css', 'less'],
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							          relativeFontPath : '../fonts/',
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							          autoHint : false,
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							          normalize : false,
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							          // ligatures : true,
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							          optimize : true,
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							          // fontHeight : 400,
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							          rename : function(name) {
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							            basename = path.basename(name);
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							            if (basename === 'android-alert.svg') {
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							              return 'error.svg';
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							            }
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							            if (basename === 'alert-circled.svg') {
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							              return 'warning.svg';
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							            }
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							            if (basename === 'ion-close-round.svg') {
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							              return 'close.svg';
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							            }
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							            return basename.replace(/(ios|md|android)-/i, '');
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							          },
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							          templateOptions: {
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							            baseClass: 'ion-icon',
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							            classPrefix: 'ion-'
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							          }
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							        }
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							      }
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							    },
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							    less: {
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							      development: {
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							        options: {
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							          paths: ["less"],
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							        },
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							        files: {
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							          "css/searxng.css": "src/less/style.less",
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							          "css/searxng-rtl.css": "src/less/style-rtl.less"
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							        }
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							      },
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							      production: {
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							        options: {
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							          paths: ["less"],
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							          plugins: [
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							            new (require('less-plugin-clean-css'))()
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							          ],
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							          sourceMap: true,
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							          sourceMapURL: (name) => { const s = name.split('/'); return s[s.length - 1] + '.map';},
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							          outputSourceFiles: false,
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							          sourceMapRootpath: '../',
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							        },
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							        files: {
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							          "css/searxng.min.css": "src/less/style.less",
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							          "css/searxng-rtl.min.css": "src/less/style-rtl.less"
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							        }
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							      },
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							    },
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							  });
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							  grunt.loadNpmTasks('grunt-contrib-watch');
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							  grunt.loadNpmTasks('grunt-contrib-copy');
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							  grunt.loadNpmTasks('grunt-contrib-uglify');
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							  grunt.loadNpmTasks('grunt-contrib-jshint');
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							  grunt.loadNpmTasks('grunt-contrib-concat');
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							  grunt.loadNpmTasks('grunt-contrib-less');
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							  grunt.loadNpmTasks('grunt-contrib-cssmin');
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							  grunt.loadNpmTasks('grunt-webfont');
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							  grunt.loadNpmTasks('grunt-stylelint');
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							  grunt.loadNpmTasks('grunt-eslint');
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							  grunt.registerTask('test', ['jshint']);
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							  grunt.registerTask('default', [
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							    'eslint',
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							    'stylelint',
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							    'copy',
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							    'concat',
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							    'uglify',
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							    'less:development',
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							    'less:production'
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							  ]);
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							};
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