webpack.config.js

/* eslint-env node */
const path = require("path");
const webpack = require("webpack");
const ExtractTextPlugin = require("extract-text-webpack-plugin");
const StringReplacePlugin = require("string-replace-webpack-plugin");
const extractStyles = new ExtractTextPlugin("main.css");
const HtmlWebpackPlugin = require("html-webpack-plugin");
const externalAssets = require("./lib/javascripts/external_assets");

module.exports = function (env) {
  return {
    entry: {
      app: [
        "babel-polyfill",
        "./src/javascripts/index.js",
        "./src/stylesheets/app.scss"
      ]
    },
    output: {
      path: path.resolve(__dirname, "./dist/assets"),
      filename: "main.js",
      sourceMapFilename: "[file].map"
    },
    module: {
      rules: [
        {
          test: /\.js$/,
          exclude: /node_modules/,
          enforce: "pre",
          loader: "eslint-loader"
        },
        {
          test: /\.(gif|jpe?g|png|svg|woff2?|ttf|eot)$/,
          loader: "url-loader?limit=10000&name=[name].[ext]"
        },
        {
          test: /\.scss$/,
          use: extractStyles.extract({
            fallback: "style-loader",
            use: [
              "css-loader?sourceMap&root=" +
              path.resolve(__dirname, "./dist/assets"),
              "sass-loader?sourceMap"
            ]
          })
        },
        {
          test: /\.json$/,
          include: path.resolve(__dirname, "./src/translations"),
          loader: "translations-loader",
          options: {
            runtime: "handlebars"
          }
        },
        {
          test: /index\.js$/,
          exclude: /node_modules/,
          loader: StringReplacePlugin.replace({
            replacements: [
              {
                pattern: '// SENTRY_INTEGRATION',
                replacement: function (match, p, offset, string) {
                  try {
                    return 'Sentry.init({dsn: "' + env.SENTRY_DSN + '"});';
                  } catch (err) {
                    return '';
                  }
                }
              }
            ]
          })
        },
        {
          test: /\.js$/,
          exclude: /node_modules/,
          loader: "babel-loader",
          options: {
            "sourceMaps": true,
          }
        },
        {
          test: /\.(handlebars|hd?bs)$/,
          loader: "handlebars-loader",
          options: {
            extensions: [".handlebars", ".hdbs", ".hbs"],
            runtime: "handlebars",
            inlineRequires: "/images/"
          }
        }
      ]
    },
    resolveLoader: {
      modules: ["node_modules", path.resolve(__dirname, "./lib/loaders")]
    },
    resolve: {
      modules: ["node_modules", path.resolve(__dirname, "./lib/javascripts")],
      alias: {
        app_manifest: path.resolve(__dirname, "./dist/manifest.json")
      }
    },
    externals: {
      handlebars: "Handlebars",
      jquery: "jQuery",
      lodash: "_",
      moment: "moment",
      zendesk_app_framework_sdk: "ZAFClient"
    },
    devtool: "#eval",
    plugins: [
      extractStyles,
      new HtmlWebpackPlugin({
        warning:
        "AUTOMATICALLY GENERATED FROM ./lib/templates/layout.hdbs - DO NOT MODIFY THIS FILE DIRECTLY",
        vendorCss: externalAssets.css,
        vendorJs: externalAssets.js,
        template: "!!handlebars-loader!./lib/templates/layout.hdbs"
      }),
      new webpack.optimize.UglifyJsPlugin({
        compress: {
          drop_debugger: false,
          warnings: false
        }
      })
    ]
  };
}