如何用 grunt 缩小文件？

Question

我正在使用 grunt/yeoman 创建一个 Angular 应用程序，并尝试创建一个带有缩小文件的公共版本。问题是没有创建js文件和css：

// Generated on 2015-06-01 using generator-angular 0.10.0
'use strict';

// # Globbing
// for performance reasons we're only matching one level down:
// 'test/spec/{,*/}*.js'
// use this if you want to recursively match all subfolders:
// 'test/spec/**/*.js'

module.exports = function (grunt) {

  // Load grunt tasks automatically
  require('load-grunt-tasks')(grunt);

  // Time how long tasks take. Can help when optimizing build times
  require('time-grunt')(grunt);

  // Configurable paths for the application
  var appConfig = {
    app: require('./bower.json').appPath || 'app',
    dist: 'dist'
  };

  // Define the configuration for all the tasks
  grunt.initConfig({

    // Watches files for changes and runs tasks based on the changed files
    watch: {
      bower: {
        files: ['bower.json'],
        tasks: ['wiredep']
      },
      js: {
        files: ['app/{,*/}*.js','app/**/*.json'],
        tasks: ['newer:jshint:all'],
        options: {
          livereload: '<%= connect.options.livereload %>'
        }
      },
      jsTest: {
        files: ['test/spec/{,*/}*.js'],
        tasks: ['newer:jshint:test', 'karma']
      },
      compass: {
        files: ['app/styles/{,*/}*.{scss,sass}'],
        tasks: ['compass:server', 'autoprefixer']
      },
      gruntfile: {
        files: ['Gruntfile.js']
      },
      livereload: {
        options: {
          livereload: '<%= connect.options.livereload %>'
        },
        files: [
          'app/**/*.html',
          'app/**/*.js',
          'app/**/*.json',
          '.tmp/styles/{,*/}*.css',
          'app/styles/{,*/}*.css',
          'app/images/{,*/}*.{png,jpg,jpeg,gif,webp,svg}'
        ]
      }
    },

    // The actual grunt server settings
    connect: {
      options: {
        port: 9000,
        // Change this to '0.0.0.0' to access the server from outside.
        hostname: 'localhost',
        livereload: 35729
      },
      livereload: {
        options: {
          open: true,
          middleware: function (connect) {
            return [
              connect.static('.tmp'),
              connect().use(
                '/bower_components',
                connect.static('./bower_components')
              ),
              connect.static(appConfig.app)
            ];
          }
        }
      },
      test: {
        options: {
          port: 9001,
          middleware: function (connect) {
            return [
              connect.static('.tmp'),
              connect.static('test'),
              connect().use(
                '/bower_components',
                connect.static('./bower_components')
              ),
              connect.static(appConfig.app)
            ];
          }
        }
      },
      dist: {
        options: {
          open: true,
          base: 'dist'
        }
      }
    },

    // Make sure code styles are up to par and there are no obvious mistakes
    jshint: {
      options: {
        jshintrc: '.jshintrc',
        reporter: require('jshint-stylish')
      },
      all: {
        src: [
          'Gruntfile.js',
          'app/scripts_old/{,*/}*.js'
        ]
      },
      test: {
        options: {
          jshintrc: 'test/.jshintrc'
        },
        src: ['test/spec/{,*/}*.js']
      }
    },

    // Empties folders to start fresh
    clean: {
      dist: {
        files: [{
          dot: true,
          src: [
            '.tmp',
            'dist/{,*/}*',
            '!dist/.git{,*/}*'
          ]
        }]
      },
      server: '.tmp'
    },

    // Add vendor prefixed styles
    autoprefixer: {
      options: {
        browsers: ['last 1 version']
      },
      dist: {
        files: [{
          expand: true,
          cwd: '.tmp/styles/',
          src: '{,*/}*.css',
          dest: '.tmp/styles/'
        }]
      }
    },

    // Automatically inject Bower components into the app
    wiredep: {
      app: {
        src: ['app/index.html'],
        ignorePath:  /\.\.\//
      },
      sass: {
        src: ['app/styles/{,*/}*.{scss,sass}'],
        ignorePath: /(\.\.\/){1,2}bower_components\//
      }
    },

    // Compiles Sass to CSS and generates necessary files if requested
    compass: {
      options: {
        sassDir: 'app/styles',
        cssDir: '.tmp/styles',
        generatedImagesDir: '.tmp/images/generated',
        imagesDir: 'app/images',
        javascriptsDir: 'app/scripts_old',
        fontsDir: 'app/styles/fonts',
        importPath: './bower_components',
        httpImagesPath: '/images',
        httpGeneratedImagesPath: '/images/generated',
        httpFontsPath: '/styles/fonts',
        relativeAssets: false,
        assetCacheBuster: false,
        raw: 'Sass::Script::Number.precision = 10\n'
      },
      dist: {
        options: {
          generatedImagesDir: 'dist/images/generated'
        }
      },
      server: {
        options: {
          debugInfo: true
        }
      }
    },

    // Renames files for browser caching purposes
    filerev: {
      dist: {
        src: [
          'dist/scripts_old/{,*/}*.js',
          'dist/styles/{,*/}*.css',
          'dist/images/{,*/}*.{png,jpg,jpeg,gif,webp,svg}',
          'dist/styles/fonts/*'
        ]
      }
    },

    // Reads HTML for usemin blocks to enable smart builds that automatically
    // concat, minify and revision files. Creates configurations in memory so
    // additional tasks can operate on them
    useminPrepare: {
      html: 'app/index.html',
      options: {
        dest: 'dist',
        flow: {
          html: {
            steps: {
              js: ['concat', 'uglifyjs'],
              css: ['cssmin']
            },
            post: {}
          }
        }
      }
    },

    // Performs rewrites based on filerev and the useminPrepare configuration
    usemin: {
      html: ['dist/{,*/}*.html'],
      css: ['dist/styles/{,*/}*.css'],
      js: ['dist/scripts/{,*/}*.js'],
      options: {
        assetsDirs: [
          'dist',
          'dist/images',
          'dist/styles'
        ],
        patterns: {
          js: [[/(images\/[^''""]*\.(png|jpg|jpeg|gif|webp|svg))/g, 'Replacing references to images']]
        }
      }
    },

    // The following *-min tasks will produce minified files in the dist folder
    // By default, your `index.html`'s <!-- Usemin block --> will take care of
    // minification. These next options are pre-configured if you do not wish
    // to use the Usemin blocks.
    cssmin: {
      dist: {
        files: {
          'dist/styles/main.css': [
            '.tmp/styles/{,*/}*.css'
          ]
        }
      }
    },
    uglify: {
      dist: {
        files: {
          'dist/scripts/scripts.js': [
            'dist/scripts/scripts.js'
          ]
        }
      }
    },
    concat: {
      dist: {}
    },

    imagemin: {
      dist: {
        files: [{
          expand: true,
          cwd: 'app/images',
          src: '{,*/}*.{png,jpg,jpeg,gif}',
          dest: 'dist/images'
        }]
      }
    },

    svgmin: {
      dist: {
        files: [{
          expand: true,
          cwd: 'app/images',
          src: '{,*/}*.svg',
          dest: 'dist/images'
        }]
      }
    },

    htmlmin: {
      dist: {
        options: {
          collapseWhitespace: true,
          conservativeCollapse: true,
          collapseBooleanAttributes: true,
          removeCommentsFromCDATA: true,
          removeOptionalTags: true
        },
        files: [{
          expand: true,
          cwd: 'dist',
          src: ['*.html', 'views/{,*/}*.html'],
          dest: 'dist'
        }]
      }
    },

    // ng-annotate tries to make the code safe for minification automatically
    // by using the Angular long form for dependency injection.
    ngAnnotate: {
      dist: {
        files: [{
          expand: true,
          cwd: '.tmp/concat/scripts',
          src: ['*.js', '!oldieshim.js'],
          dest: '.tmp/concat/scripts'
        }]
      }
    },

    // Replace Google CDN references
    cdnify: {
      dist: {
        html: ['dist/*.html']
      }
    },

    // Copies remaining files to places other tasks can use
    copy: {
      dist: {
        files: [{
          expand: true,
          dot: true,
          cwd: 'app',
          dest: 'dist',
          src: [
            '*.{ico,png,txt}',
            '.htaccess',
            'modules/**.*.js',
            '*.html',
            'views/{,*/}*.html',
            'images/{,*/}*.{webp}',
            'fonts/{,*/}*.*'
          ]
        }, {
          expand: true,
          cwd: '.tmp/images',
          dest: 'dist/images',
          src: ['generated/*']
        }, {
          expand: true,
          cwd: '.',
          src: 'bower_components/bootstrap-sass-official/assets/fonts/bootstrap/*',
          dest: 'dist'
        }]
      },
      styles: {
        expand: true,
        cwd: 'app/styles',
        dest: '.tmp/styles/',
        src: '{,*/}*.css'
      }
    },

    // Run some tasks in parallel to speed up the build process
    concurrent: {
      server: [
        'compass:server'
      ],
      test: [
        'compass'
      ],
      dist: [
        'compass:dist',
        'imagemin',
        'svgmin'
      ]
    },

    // Test settings
    karma: {
      unit: {
        configFile: 'test/karma.conf.js',
        singleRun: true
      }
    },
    protractor: {
      options: {
        keepAlive: true,
        configFile: "test/protractor.conf.js"
      },
      run: {}
    }
  });


  grunt.registerTask('serve', 'Compile then start a connect web server', function (target) {
    grunt.log.warn('running grunt serve , value of target',target);
    if (target === 'dist') {
      grunt.log.warn('target = dist');
      return grunt.task.run(['build', 'connect:dist:keepalive']);
    }

    grunt.task.run([
      'clean:server',
      'wiredep',
      'test',
      //'concurrent:server',
      'autoprefixer',
      'connect:livereload',
      'watch'
    ]);
  });

  grunt.registerTask('server', 'DEPRECATED TASK. Use the "serve" task instead', function (target) {
    grunt.log.warn('The `server` task has been deprecated. Use `grunt serve` to start a server.');
    grunt.task.run(['serve:' + target]);
  });

  grunt.loadNpmTasks("grunt-protractor-runner");

  grunt.registerTask('test', [
    'clean:server',
    //'concurrent:test',
    'autoprefixer',
    'connect:test',
    'karma'
    //'protractor:run'
  ]);

  grunt.registerTask('build', [
    'clean:dist',
    'wiredep',
    //'useminPrepare',
    //'concurrent:dist',
    'autoprefixer',
    'concat',
    'ngAnnotate',
    'copy:dist',
    //'cdnify',
    'cssmin',
    'uglify',
    'filerev',
    'usemin',
    'htmlmin'
  ]);

  grunt.registerTask('default', [
    'newer:jshint',
    'test',
    'build'
  ]);
};

目录结构如下：

应用程序/模块/ 风格 commone///partials

当我运行 grunt build 时，我得到：

Loading "imagemin.js" tasks...ERROR
>> Error: Cannot find module 'imagemin-gifsicle'
>> Local Npm module "grunt-google-cdn" not found. Is it installed?

Running "clean:dist" (clean) task
Cleaning dist/.htaccess...OK
Cleaning dist/404.html...OK
Cleaning dist/bower_components...OK
Cleaning dist/index.html...OK
Cleaning dist/robots.txt...OK

Running "wiredep:app" (wiredep) task

Running "wiredep:sass" (wiredep) task

Running "autoprefixer:dist" (autoprefixer) task

Running "concat:dist" (concat) task

Running "ngAnnotate:dist" (ngAnnotate) task
>> No files provided to the ngAnnotate task.

Running "copy:dist" (copy) task
Copied 9 files

Running "cssmin:dist" (cssmin) task
>> Destination not written because minified CSS was empty.

Running "uglify:dist" (uglify) task
>> Destination dist/scripts/scripts.js not written because src files were empty.

Running "filerev:dist" (filerev) task

Running "usemin:html" (usemin) task
Replaced 2 references to assets

Running "usemin:css" (usemin) task
Replaced 0 references to assets

Running "usemin:js" (usemin) task
Replaced 0 references to assets

Running "htmlmin:dist" (htmlmin) task
Minified dist/404.html 3.53 kB → 3.39 kB
Minified dist/index.html 1.16 kB → 1.07 kB

Done, without errors.

如何生成css和js文件？

Answer 1

您能否确保在 uglify 配置中映射了正确的源文件。根据您当前上面粘贴的脚本，源文件和目标文件都具有相同的名称。

uglify: {
  dist: {
    files: {
      'dist/scripts/scripts.js': [
        'dist/scripts/scripts.js'
      ]
    }
  }
}

您可以通过this 了解更多信息。最初尝试使用这样的简单配置使其工作：

uglify: {
  dist: {
     files: {'dest/b.js': ['src/bb.js', 'src/bbb.js']}
  }
}

htmlmin 任务的工作原理参见here。以及这些文件位于 dist 文件夹中的位置，请参见下文

htmlmin: {
  dist: {
    options: {
      collapseWhitespace: true,
      conservativeCollapse: true,
      collapseBooleanAttributes: true,
      removeCommentsFromCDATA: true,
      removeOptionalTags: true
    },
    files: [{
      expand: true,
      cwd: 'dist',
      src: ['*.html', 'views/{,*/}*.html'],
      dest: 'dist'
    }]
  }
}