vue.config.js

const path = require('path');
const RobotstxtPlugin = require("robotstxt-webpack-plugin");

const paths = {
  src: path.resolve(path.join(__dirname, 'src')),
  dist: path.resolve(path.join(__dirname, 'dist')),
}

// see https://github.com/itgalaxy/generate-robotstxt
const robotstxtPluginOptions = {
  policy: [
    process.env.VUE_APP_MODE === 'production' ? {
      userAgent: "*",
      disallow: "/embed.html",
    } : {
        userAgent: "*",
        disallow: "/",
      }
  ],
}

if (process.env.NODE_ENV != 'production') {
  process.env.VUE_APP_TITLE = process.env.VUE_APP_TITLE + ' (preview)'
  process.env.VUE_APP_DESC = process.env.VUE_APP_DESC + ' (preview)'
}

indexTemplate = process.env.CADDY_BUILD == '1' ? 'index_caddy.html' : 'index.html'

console.log("Using template", indexTemplate)

module.exports = {
  productionSourceMap: process.env.NODE_ENV != 'production',
  publicPath: process.env.C19_PUBLIC_PATH || '/',
  outputDir: process.env.C19_OUTPUT_DIR || 'dist',
  filenameHashing: true,
  devServer: {
    disableHostCheck: true,
  },
  pages: {
    index: {
      entry: ['src/index.js'],
      template: indexTemplate,
      filename: 'index.html',
    },
    embed: {
      entry: ['src/embed.js'],
      template: indexTemplate,
      filename: 'embed.html',
    },
  },
  css: {
    loaderOptions: {
      scss: {
        prependData: '@import "@/../src/style/bootstrap.scss";'
      },
      sass: {
        prependData: '@import "@/../src/style/bootstrap.scss"'
      },
    }
  },
  pluginOptions: {
    webpackBundleAnalyzer: {
      analyzerMode: process.env.DISPLAY ? 'server' : 'disabled',
      openAnalyzer: process.env.DISPLAY ? true : false,
    },
  },
  // configureWebpack: {
  //   plugins: [
  //     new RobotstxtPlugin(robotstxtPluginOptions)
  //   ]
  // },
  chainWebpack: config => {

    config.output.filename('[name].[hash:8].js')
    config.output.chunkFilename('[name].[hash:8].js')

    if (config.plugins.has('prefetch-index')) {
      config.plugin('prefetch-index').tap(options => {
        options[0].fileBlacklist = options.fileBlacklist || [];
        options[0].fileBlacklist.push(/.*\.route\./);
        return options;
      });
    }
    config.plugin('robotstxt').use(RobotstxtPlugin, [robotstxtPluginOptions])

    // Markdown Loader
    config.module
      .rule('md')
      .test(/\.md$/)
      .use('html-loader')
      .loader('html-loader')
      .end()
      .use('markdown-loader')
      .loader('markdown-loader')
      .end()
    // Fable loader
    config.module
      .rule('fable')
      .test(/\.fs(x|proj)?$/)
      .use('fable-loader')
      .loader('fable-loader')
      .end()

    config.resolve.modules.prepend(paths.src)
  }
}