2.8.0 - Webpack 4, Babel 7

scripts/build.js

@@ -14,37 +14,55 @@ process.on('unhandledRejection', err => {
 // Ensure environment variables are read.
 require('../config/env');
 
+
+const path = require('path');
 const chalk = require('chalk');
 const fs = require('fs-extra');
 const webpack = require('webpack');
+const bfj = require('bfj');
 const config = require('../config/webpack.config.prod');
 const paths = require('../config/paths');
 const checkRequiredFiles = require('react-dev-utils/checkRequiredFiles');
 const formatWebpackMessages = require('react-dev-utils/formatWebpackMessages');
+const printHostingInstructions = require('react-dev-utils/printHostingInstructions');
 const FileSizeReporter = require('react-dev-utils/FileSizeReporter');
 const printBuildError = require('react-dev-utils/printBuildError');
 
 const measureFileSizesBeforeBuild =
   FileSizeReporter.measureFileSizesBeforeBuild;
 const printFileSizesAfterBuild = FileSizeReporter.printFileSizesAfterBuild;
+const useYarn = fs.existsSync(paths.yarnLockFile);
 
 // These sizes are pretty large. We'll warn for bundles exceeding them.
 const WARN_AFTER_BUNDLE_GZIP_SIZE = 512 * 1024;
 const WARN_AFTER_CHUNK_GZIP_SIZE = 1024 * 1024;
 
+const isInteractive = process.stdout.isTTY;
+
 // Warn and crash if required files are missing
-if (!checkRequiredFiles([paths.appLibIndexJs])) { // CRL: Updated with library index file
+if (!checkRequiredFiles([paths.appHtml, paths.appIndexJs])) {
   process.exit(1);
 }
 
-// First, read the current file sizes in build directory.
-// This lets us display how much they changed later.
-measureFileSizesBeforeBuild(paths.appBuild)
+// Process CLI arguments
+const argv = process.argv.slice(2);
+const writeStatsJson = argv.indexOf('--stats') !== -1;
+
+// We require that you explicitly set browsers and do not fall back to
+// browserslist defaults.
+const { checkBrowsers } = require('react-dev-utils/browsersHelper');
+checkBrowsers(paths.appPath, isInteractive)
+  .then(() => {
+    // First, read the current file sizes in build directory.
+    // This lets us display how much they changed later.
+    return measureFileSizesBeforeBuild(paths.appBuild);
+  })
   .then(previousFileSizes => {
     // Remove all content but keep the directory so that
     // if you're in it, you don't end up in Trash
     fs.emptyDirSync(paths.appBuild);
-
+    // Merge with the public folder
+    //copyPublicFolder();
     // Start the webpack build
     return build(previousFileSizes);
   })
@@ -76,13 +94,31 @@ measureFileSizesBeforeBuild(paths.appBuild)
         WARN_AFTER_CHUNK_GZIP_SIZE
       );
       console.log();
+
+      const appPackage = require(paths.appPackageJson);
+      const publicUrl = paths.publicUrl;
+      const publicPath = config.output.publicPath;
+      const buildFolder = path.relative(process.cwd(), paths.appBuild);
+      printHostingInstructions(
+        appPackage,
+        publicUrl,
+        publicPath,
+        buildFolder,
+        useYarn
+      );
     },
     err => {
       console.log(chalk.red('Failed to compile.\n'));
       printBuildError(err);
       process.exit(1);
     }
-  );
+  )
+  .catch(err => {
+    if (err && err.message) {
+      console.log(err.message);
+    }
+    process.exit(1);
+  });
 
 // Create the production build and print the deployment instructions.
 function build(previousFileSizes) {
@@ -91,10 +127,20 @@ function build(previousFileSizes) {
   let compiler = webpack(config);
   return new Promise((resolve, reject) => {
     compiler.run((err, stats) => {
+      let messages;
       if (err) {
-        return reject(err);
+        if (!err.message) {
+          return reject(err);
+        }
+        messages = formatWebpackMessages({
+          errors: [err.message],
+          warnings: [],
+        });
+      } else {
+        messages = formatWebpackMessages(
+          stats.toJson({ all: false, warnings: true, errors: true })
+        );
       }
-      const messages = formatWebpackMessages(stats.toJson({}, true));
       if (messages.errors.length) {
         // Only keep the first error. Others are often indicative
         // of the same problem, but confuse the reader with noise.
@@ -117,11 +163,27 @@ function build(previousFileSizes) {
         );
         return reject(new Error(messages.warnings.join('\n\n')));
       }
-      return resolve({
+
+      const resolveArgs = {
         stats,
         previousFileSizes,
         warnings: messages.warnings,
-      });
+      };
+      if (writeStatsJson) {
+        return bfj
+          .write(paths.appBuild + '/bundle-stats.json', stats.toJson())
+          .then(() => resolve(resolveArgs))
+          .catch(error => reject(new Error(error)));
+      }
+
+      return resolve(resolveArgs);
     });
   });
 }
+
+function copyPublicFolder() {
+  fs.copySync(paths.appPublic, paths.appBuild, {
+    dereference: true,
+    filter: file => file !== paths.appHtml,
+  });
+}