无法读取未定义的属性'main' [英] Cannot read property 'main' of undefined

问题描述

所以我的项目结构是我的根目录 src 和 www 目录 ./ ，它还包含我的 bower.json ， gulpfile.js 和 .bowerrc 与目录设为 ./ www / bower / 。

<我的code> index.html 在我的 ./ src ，我已经设置了一个通过 wiredep 并输出到 ./ www 的gulp任务。不幸的是，它增加了所有的依赖，就好像它存在于 ./ src 目录中一样。所有这些都以前缀 ../ www / bower / 为前缀，最终 index.html 结束在 www 目录中，我使用一些 wiredep 配置选项如下所示：

  gulp.task（'bower'，function（）{
 gulp.src（'./ src / index.html'）
.pipe（wiredep（{
 cwd：'./www ，
 bowerJson：require（'./ bower.json'），
 directory：'../.bowerrc'
}））
 .pipe（gulp.dest（' 。/万维网'））; 
}）; 
  

然而，我得到以下错误：

  stream.js：94 
 throw er; //管道中未处理的流错误。 
 ^ 
 TypeError：无法在findMainFiles中读取未定义
的属性'main'（D：\Dropbox\University\MindFlipDOM\\\
ode_modules\wiredep\lib\detect- 
 at D：\Dropbox\University\MindFlipDOM\\\
ode_modules\wiredep\lib\detect-dependencies.js：111：17 
 at forOwn （D：\Dropbox\University\MindFlipDOM\\\
ode_modules\wiredep\\\
ode_modules\lodash\dist\lodash.js：1301：15）
 at Function.forEach（D：\ Dropbox \University\MindFlipDOM\\\
ode_modules\wiredep\\\
ode_modules\lodash\dist\lodash.js：2595：9）
 at detect（D：\Dropbox\University\MindFlipDOM \\\
ode_modules\wiredep\lib\detect-dependencies.js：312：5）
在wiredep（D：\Dropbox\University\MindFlipDOM\\\
ode_modules\wiredep\wiredep.js ：178：39）
在Transform._tran sform（D：\Dropbox\University\MindFlipDOM\\\
ode_modules\wiredep\wiredep.js: 217:34）
在Transform._read（D：\Dropbox\University\MindFlipDOM\\ $ Transform._write（$ D $ \\\\\\\\\\\\\\\\\\\\\\\'） \\ MindFlipDOM\\\
ode_modules\wiredep\\\
ode_modules\through2\\\
ode_modules\readable-stream\lib\_stream_transform.js：172：12）
在doWrite（D：\Dropbox\University \MindFlipDOM\\\
ode_modules\wiredep\\\
ode_modules\through2\\\
ode_modules\readable-stream\lib\_stream_writable.js：238：10）
  

所以我做错了什么？

这将确保下载缺少的必要模块。

 
 bower安装
 

So my project structures is I have a src and www directory in my root ./, which also contains my bower.json, gulpfile.js, and .bowerrc with the directory set to ./www/bower/.

I have an index.html in my ./src and I've setup a gulp task that pipes it through wiredep and out to the ./www where the bower packages are.

Unfortunately it adds all the dependecies as if it's in the ./src directory so all of them are prefixed like ../www/bower/ which does work as the final index.html ends up in the www directory so I fiddled with some of the wiredep configuration options like so:

gulp.task('bower', function () {
    gulp.src('./src/index.html')
    .pipe(wiredep({
        cwd: './www',
        bowerJson: require('./bower.json'),
        directory: '../.bowerrc'
    }))
    .pipe(gulp.dest('./www'));
});

However I get the following error:

stream.js:94
    throw er; // Unhandled stream error in pipe.
            ^
TypeError: Cannot read property 'main' of undefined
    at findMainFiles (D:\Dropbox\University\MindFlipDOM\node_modules\wiredep\lib\detect-dependencies.js:53:37)
    at D:\Dropbox\University\MindFlipDOM\node_modules\wiredep\lib\detect-dependencies.js:111:17
    at forOwn (D:\Dropbox\University\MindFlipDOM\node_modules\wiredep\node_modules\lodash\dist\lodash.js:1301:15)
    at Function.forEach (D:\Dropbox\University\MindFlipDOM\node_modules\wiredep\node_modules\lodash\dist\lodash.js:2595:9)
    at detect (D:\Dropbox\University\MindFlipDOM\node_modules\wiredep\lib\detect-dependencies.js:312:5)
    at wiredep (D:\Dropbox\University\MindFlipDOM\node_modules\wiredep\wiredep.js:178:39)
    at Transform._transform (D:\Dropbox\University\MindFlipDOM\node_modules\wiredep\wiredep.js:217:34)
    at Transform._read (D:\Dropbox\University\MindFlipDOM\node_modules\wiredep\node_modules\through2\node_modules\readable-stream\lib\_stream_transform.js:184:10)
    at Transform._write (D:\Dropbox\University\MindFlipDOM\node_modules\wiredep\node_modules\through2\node_modules\readable-stream\lib\_stream_transform.js:172:12)
    at doWrite (D:\Dropbox\University\MindFlipDOM\node_modules\wiredep\node_modules\through2\node_modules\readable-stream\lib\_stream_writable.js:238:10)

So what am I doing wrong?

解决方案

Also try, this will make sure to download the necessary modules that were missing.

bower install

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