gruntjs - 无法使用 grunt imagemin 优化文件夹内的图像

Question

我正在尝试使用 grunt 的 imagemin module 优化图像.

我的目录结构如下所示:

公共(public)图片

主要

上传

文件夹1

...

文件夹N

在每个文件夹 1..N 中都有文件。它们都是.jpg

我想要实现的是尝试优化所有这些并用更新的版本(同名)更改它们。我从一个更简单的任务开始优化它们并复制到另一个文件夹( publicImages )保留相同的结构。

查看文档，我想出了以下 JSON:

imagemin: {
    dynamic: {
        files: [{
            expand: true,
            cwd: 'publicImg/',
            src: ['*.jpg'],
            dest: 'publicImages/'
        }]
    }
}

告诉我 Minified 0 images (saved 0 B) , 我尝试使用 **/*jpg , **/*.{jpg}但仍然具有相同的效果。如何正确完成？

Answer 1

下一个配置完全适合我。在您描述的环境中测试。

包.json :

{
  "devDependencies": {
    "grunt": "^0.4.5",
    "grunt-contrib-imagemin": "^0.7.1"
  }
}

Gruntfile.js :

module.exports = function (grunt) {
  grunt.initConfig({
    imagemin: {
      dynamic: {
        files: [{
          expand: true,
          cwd: 'publicImg/',
          src: ['**/*.jpg'],
          dest: 'publicImages/'
        }]
      }
    }
  });

  grunt.loadNpmTasks('grunt-contrib-imagemin');
  grunt.registerTask('default', ['imagemin']);
};

输出 :

raiden@toluca:~/projects/test$ tree publicImg/
publicImg/
├── main
└── upload
    ├── folder1
    │   ├── 2499085-metal-gear-solid-5-exteded-e3.jpg
    │   └── url.htm
    ├── folder2
    │   └── metal-gear-solid-5-ground-zeroes-collectibles.jpg
    └── folder3
        ├── 2574364-8751006069-14019.jpg
        ├── Metal-Gear-Solid-5-The-Phantom-Pain-Trailer.jpg
        └── Metal_Gear_Solid_V_Screenshot.jpg

5 directories, 6 files
raiden@toluca:~/projects/test$ grunt
Running "imagemin:dynamic" (imagemin) task
✔ publicImg/upload/folder1/2499085-metal-gear-solid-5-exteded-e3.jpg (saved 8.99 kB - 7%)
✔ publicImg/upload/folder2/metal-gear-solid-5-ground-zeroes-collectibles.jpg (saved 8.5 kB - 25%)
✔ publicImg/upload/folder3/2574364-8751006069-14019.jpg (already optimized)
✔ publicImg/upload/folder3/Metal-Gear-Solid-5-The-Phantom-Pain-Trailer.jpg (saved 2.22 kB - 3%)
✔ publicImg/upload/folder3/Metal_Gear_Solid_V_Screenshot.jpg (already optimized)
Minified 5 images (saved 19.71 kB)

Done, without errors.
raiden@toluca:~/projects/test$ tree publicImages/
publicImages/
└── upload
    ├── folder1
    │   └── 2499085-metal-gear-solid-5-exteded-e3.jpg
    ├── folder2
    │   └── metal-gear-solid-5-ground-zeroes-collectibles.jpg
    └── folder3
        ├── 2574364-8751006069-14019.jpg
        ├── Metal-Gear-Solid-5-The-Phantom-Pain-Trailer.jpg
        └── Metal_Gear_Solid_V_Screenshot.jpg

4 directories, 5 files

也许你的 grunt-contrib-imagemin 安装有问题。尝试做 npm rebuild grunt-contrib-imagemin看看有没有错误。或通过 npm update grunt-contrib-imagemin 更新模块.