全局安装webpack时出现的情况，webpack -v输出undefined

Question

如图全局安装了webpack但是出现了undefined的情况，而且webpack命令运行，也是输出undefined，但是在webpack.config.js中写的console会照常打印，求帮助

初步估计问题出在webpack.config的入口entry中

最后输出为动态生成

var path = require('path');
var HtmlWebpackPlugin = require('html-webpack-plugin');
var FriendlyErrorsPlugin = require('friendly-errors-webpack-plugin');
var merge = require('webpack-merge');
var webpack=require('webpack');

function resolve (dir) {
  return path.join(__dirname, dir)
}
var template_dir=path.join(__dirname,'..', 'templates')
var app=['danyuanceshi'];
var templates=['paper/template_danyuanceshi'];
var entry={};


if (Array.isArray(app)) {
    app.forEach(function(item) {
        entry[item] = "./app/" +item + ".js";
    });
}
else {
    entry[app] = __dirname + "/app/" + app + ".js";
}

/*console.log(entry);*/

var plugins=[
    new webpack.optimize.DedupePlugin(),
    function()
    {
        this.plugin("done", function(stats)
        {
            if (stats.compilation.errors && stats.compilation.errors.length)
            {
                // console.log(stats.compilation.errors);
                //console.log(stats.compilation.errors[stats.compilation.errors.length-1].issuer);
                console.log(stats.compilation.errors[stats.compilation.errors.length-1].message);
                if (stats.compilation.errors[stats.compilation.errors.length-1].details) {
                    console.log(stats.compilation.errors[stats.compilation.errors.length-1].details);
                }

                process.exit(1);
            }
        });
    },
    // new webpack.NoEmitOnErrorsPlugin(),
    new FriendlyErrorsPlugin()
]
if(Array.isArray(templates)){
    templates.forEach(function (item) {
        plugins.push(new HtmlWebpackPlugin({
            filename: template_dir+item+'.html',
            template: item+'.html',
            inject: true
        }))
    })
}else{
   plugins.push(new HtmlWebpackPlugin({
            filename: templates+'.html',
            template: template_dir+templates+'.html',
            inject: true
        }))
}
var extraWebpackConfig={
    entry:entry,
    plugins:plugins
};

var baseWebpackConfig={
    output:{
        path:path.resolve(__dirname,'./dist'),
        filename:'[name].js'
    },
    // cheap-module-eval-source-map is faster for development
    devtool: '#cheap-module-eval-source-map',
    module: {
        rules: [
          {
            test: /\.js$/,
            loader: 'babel-loader',
            include: [resolve('app'),resolve('js'),resolve('qishi')]
          },
            {
              test: /\.less$/,
                loaders: ["style-loader", "css-loader", "postcss-loader",  "less-loader"],
            },
            {
               test: /\.css$/,
                 loaders: ["style-loader", "css-loader", "postcss-loader"]
            },
         /* {
            test: /\.(png|jpe?g|gif|svg)(\?.*)?$/,
            loader: 'url-loader',
            options: {
              limit: 10000,
              name: utils.assetsPath('img/[name].[hash:7].[ext]')
            }
          },
          {
            test: /\.(woff2?|eot|ttf|otf)(\?.*)?$/,
            loader: 'url-loader',
            options: {
              limit: 10000,
              name: utils.assetsPath('fonts/[name].[hash:7].[ext]')
            }
          }*/
        ]
  },
    postcss: () => {
        return [
          require('precss'),
          require('autoprefixer')
        ];
      },
    resolve: {
        extensions: ['.js', '.json'],
        alias: {
          '@': resolve('js')
        }
  },
};
console.log(extraWebpackConfig,baseWebpackConfig);

module.exports=merge(extraWebpackConfig,baseWebpackConfig);

Answer 1

看一下你的以下路径是否在环境变量的path里？？？

C:\Users\17ZY-\AppData\Roaming\npm