83_TianyiXing_HW5/6 submission

Lesson4/assignment/package.json

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+{
+  "name": "react-box",
+  "version": "0.1.0",
+  "private": true,
+  "devDependencies": {
+    "autoprefixer": "6.5.1",
+    "babel-core": "6.17.0",
+    "babel-eslint": "7.1.1",
+    "babel-jest": "17.0.2",
+    "babel-loader": "6.2.7",
+    "babel-preset-react-app": "^2.0.1",
+    "case-sensitive-paths-webpack-plugin": "1.1.4",
+    "chalk": "1.1.3",
+    "connect-history-api-fallback": "1.3.0",
+    "cross-spawn": "4.0.2",
+    "css-loader": "0.26.0",
+    "detect-port": "1.0.1",
+    "dotenv": "2.0.0",
+    "eslint": "3.8.1",
+    "eslint-config-react-app": "^0.5.0",
+    "eslint-loader": "1.6.0",
+    "eslint-plugin-flowtype": "2.21.0",
+    "eslint-plugin-import": "2.0.1",
+    "eslint-plugin-jsx-a11y": "2.2.3",
+    "eslint-plugin-react": "6.4.1",
+    "extract-text-webpack-plugin": "1.0.1",
+    "file-loader": "0.9.0",
+    "filesize": "3.3.0",
+    "fs-extra": "0.30.0",
+    "gzip-size": "3.0.0",
+    "html-webpack-plugin": "2.24.0",
+    "http-proxy-middleware": "0.17.2",
+    "jest": "18.1.0",
+    "json-loader": "0.5.4",
+    "object-assign": "4.1.0",
+    "path-exists": "2.1.0",
+    "postcss-loader": "1.0.0",
+    "promise": "7.1.1",
+    "react-dev-utils": "^0.4.2",
+    "recursive-readdir": "2.1.0",
+    "strip-ansi": "3.0.1",
+    "style-loader": "0.13.1",
+    "truffle-contract": "^1.1.8",
+    "truffle-solidity-loader": "0.0.8",
+    "url-loader": "0.5.7",
+    "webpack": "1.14.0",
+    "webpack-dev-server": "1.16.2",
+    "webpack-manifest-plugin": "1.1.0",
+    "whatwg-fetch": "1.0.0"
+  },
+  "dependencies": {
+    "dotenv": "^2.0.0",
+    "react": "^15.4.2",
+    "react-dom": "^15.4.2"
+  },
+  "scripts": {
+    "start": "node scripts/start.js",
+    "build": "node scripts/build.js",
+    "test": "node scripts/test.js --env=jsdom"
+  },
+  "jest": {
+    "collectCoverageFrom": [
+      "src/**/*.{js,jsx}"
+    ],
+    "setupFiles": [
+      "<rootDir>/config/polyfills.js"
+    ],
+    "testMatch": [
+      "<rootDir>/src/**/__tests__/**/*.js?(x)",
+      "<rootDir>/src/**/?(*.)(spec|test).js?(x)"
+    ],
+    "testEnvironment": "node",
+    "testURL": "http://localhost",
+    "transform": {
+      "^.+\\.(js|jsx)$": "<rootDir>/node_modules/babel-jest",
+      "^.+\\.css$": "<rootDir>/config/jest/cssTransform.js",
+      "^(?!.*\\.(js|jsx|css|json)$)": "<rootDir>/config/jest/fileTransform.js"
+    },
+    "transformIgnorePatterns": [
+      "[/\\\\]node_modules[/\\\\].+\\.(js|jsx)$"
+    ],
+    "moduleNameMapper": {
+      "^react-native$": "react-native-web"
+    },
+    "moduleFileExtensions": [
+      "web.js",
+      "js",
+      "json",
+      "web.jsx",
+      "jsx"
+    ]
+  },
+  "babel": {
+    "presets": [
+      "react-app"
+    ]
+  },
+  "eslintConfig": {
+    "extends": "react-app"
+  }
+}

Lesson4/assignment/scripts/build.js

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+// Do this as the first thing so that any code reading it knows the right env.
+process.env.NODE_ENV = 'production';
+
+// Load environment variables from .env file. Suppress warnings using silent
+// if this file is missing. dotenv will never modify any environment variables
+// that have already been set.
+// https://github.com/motdotla/dotenv
+require('dotenv').config({silent: true});
+
+var chalk = require('chalk');
+var fs = require('fs-extra');
+var path = require('path');
+var pathExists = require('path-exists');
+var filesize = require('filesize');
+var gzipSize = require('gzip-size').sync;
+var webpack = require('webpack');
+var config = require('../config/webpack.config.prod');
+var paths = require('../config/paths');
+var checkRequiredFiles = require('react-dev-utils/checkRequiredFiles');
+var recursive = require('recursive-readdir');
+var stripAnsi = require('strip-ansi');
+
+var useYarn = pathExists.sync(paths.yarnLockFile);
+
+// Warn and crash if required files are missing
+if (!checkRequiredFiles([paths.appHtml, paths.appIndexJs])) {
+  process.exit(1);
+}
+
+// Input: /User/dan/app/build/static/js/main.82be8.js
+// Output: /static/js/main.js
+function removeFileNameHash(fileName) {
+  return fileName
+    .replace(paths.appBuild, '')
+    .replace(/\/?(.*)(\.\w+)(\.js|\.css)/, (match, p1, p2, p3) => p1 + p3);
+}
+
+// Input: 1024, 2048
+// Output: "(+1 KB)"
+function getDifferenceLabel(currentSize, previousSize) {
+  var FIFTY_KILOBYTES = 1024 * 50;
+  var difference = currentSize - previousSize;
+  var fileSize = !Number.isNaN(difference) ? filesize(difference) : 0;
+  if (difference >= FIFTY_KILOBYTES) {
+    return chalk.red('+' + fileSize);
+  } else if (difference < FIFTY_KILOBYTES && difference > 0) {
+    return chalk.yellow('+' + fileSize);
+  } else if (difference < 0) {
+    return chalk.green(fileSize);
+  } else {
+    return '';
+  }
+}
+
+// First, read the current file sizes in build directory.
+// This lets us display how much they changed later.
+recursive(paths.appBuild, (err, fileNames) => {
+  var previousSizeMap = (fileNames || [])
+    .filter(fileName => /\.(js|css)$/.test(fileName))
+    .reduce((memo, fileName) => {
+      var contents = fs.readFileSync(fileName);
+      var key = removeFileNameHash(fileName);
+      memo[key] = gzipSize(contents);
+      return memo;
+    }, {});
+
+  // Remove all content but keep the directory so that
+  // if you're in it, you don't end up in Trash
+  fs.emptyDirSync(paths.appBuild);
+
+  // Start the webpack build
+  build(previousSizeMap);
+
+  // Merge with the public folder
+  copyPublicFolder();
+});
+
+// Print a detailed summary of build files.
+function printFileSizes(stats, previousSizeMap) {
+  var assets = stats.toJson().assets
+    .filter(asset => /\.(js|css)$/.test(asset.name))
+    .map(asset => {
+      var fileContents = fs.readFileSync(paths.appBuild + '/' + asset.name);
+      var size = gzipSize(fileContents);
+      var previousSize = previousSizeMap[removeFileNameHash(asset.name)];
+      var difference = getDifferenceLabel(size, previousSize);
+      return {
+        folder: path.join('build_webpack', path.dirname(asset.name)),
+        name: path.basename(asset.name),
+        size: size,
+        sizeLabel: filesize(size) + (difference ? ' (' + difference + ')' : '')
+      };
+    });
+  assets.sort((a, b) => b.size - a.size);
+  var longestSizeLabelLength = Math.max.apply(null,
+    assets.map(a => stripAnsi(a.sizeLabel).length)
+  );
+  assets.forEach(asset => {
+    var sizeLabel = asset.sizeLabel;
+    var sizeLength = stripAnsi(sizeLabel).length;
+    if (sizeLength < longestSizeLabelLength) {
+      var rightPadding = ' '.repeat(longestSizeLabelLength - sizeLength);
+      sizeLabel += rightPadding;
+    }
+    console.log(
+      '  ' + sizeLabel +
+      '  ' + chalk.dim(asset.folder + path.sep) + chalk.cyan(asset.name)
+    );
+  });
+}
+
+// Print out errors
+function printErrors(summary, errors) {
+  console.log(chalk.red(summary));
+  console.log();
+  errors.forEach(err => {
+    console.log(err.message || err);
+    console.log();
+  });
+}
+
+// Create the production build and print the deployment instructions.
+function build(previousSizeMap) {
+  console.log('Creating an optimized production build...');
+  webpack(config).run((err, stats) => {
+    if (err) {
+      printErrors('Failed to compile.', [err]);
+      process.exit(1);
+    }
+
+    if (stats.compilation.errors.length) {
+      printErrors('Failed to compile.', stats.compilation.errors);
+      process.exit(1);
+    }
+
+    if (process.env.CI && stats.compilation.warnings.length) {
+     printErrors('Failed to compile.', stats.compilation.warnings);
+     process.exit(1);
+   }
+
+    console.log(chalk.green('Compiled successfully.'));
+    console.log();
+
+    console.log('File sizes after gzip:');
+    console.log();
+    printFileSizes(stats, previousSizeMap);
+    console.log();
+
+    var openCommand = process.platform === 'win32' ? 'start' : 'open';
+    var appPackage  = require(paths.appPackageJson);
+    var homepagePath = appPackage.homepage;
+    var publicPath = config.output.publicPath;
+    if (homepagePath && homepagePath.indexOf('.github.io/') !== -1) {
+      // "homepage": "http://user.github.io/project"
+      console.log('The project was built assuming it is hosted at ' + chalk.green(publicPath) + '.');
+      console.log('You can control this with the ' + chalk.green('homepage') + ' field in your '  + chalk.cyan('package.json') + '.');
+      console.log();
+      console.log('The ' + chalk.cyan('build_webpack') + ' folder is ready to be deployed.');
+      console.log('To publish it at ' + chalk.green(homepagePath) + ', run:');
+      // If script deploy has been added to package.json, skip the instructions
+      if (typeof appPackage.scripts.deploy === 'undefined') {
+        console.log();
+        if (useYarn) {
+          console.log('  ' + chalk.cyan('yarn') +  ' add --dev gh-pages');
+        } else {
+          console.log('  ' + chalk.cyan('npm') +  ' install --save-dev gh-pages');
+        }
+        console.log();
+        console.log('Add the following script in your ' + chalk.cyan('package.json') + '.');
+        console.log();
+        console.log('    ' + chalk.dim('// ...'));
+        console.log('    ' + chalk.yellow('"scripts"') + ': {');
+        console.log('      ' + chalk.dim('// ...'));
+        console.log('      ' + chalk.yellow('"deploy"') + ': ' + chalk.yellow('"npm run build&&gh-pages -d build"'));
+        console.log('    }');
+        console.log();
+        console.log('Then run:');
+      }
+      console.log();
+      console.log('  ' + chalk.cyan(useYarn ? 'yarn' : 'npm') +  ' run deploy');
+      console.log();
+    } else if (publicPath !== '/') {
+      // "homepage": "http://mywebsite.com/project"
+      console.log('The project was built assuming it is hosted at ' + chalk.green(publicPath) + '.');
+      console.log('You can control this with the ' + chalk.green('homepage') + ' field in your '  + chalk.cyan('package.json') + '.');
+      console.log();
+      console.log('The ' + chalk.cyan('build_webpack') + ' folder is ready to be deployed.');
+      console.log();
+    } else {
+      // no homepage or "homepage": "http://mywebsite.com"
+      console.log('The project was built assuming it is hosted at the server root.');
+      if (homepagePath) {
+        // "homepage": "http://mywebsite.com"
+        console.log('You can control this with the ' + chalk.green('homepage') + ' field in your '  + chalk.cyan('package.json') + '.');
+        console.log();
+      } else {
+        // no homepage
+        console.log('To override this, specify the ' + chalk.green('homepage') + ' in your '  + chalk.cyan('package.json') + '.');
+        console.log('For example, add this to build it for GitHub Pages:')
+        console.log();
+        console.log('  ' + chalk.green('"homepage"') + chalk.cyan(': ') + chalk.green('"http://myname.github.io/myapp"') + chalk.cyan(','));
+        console.log();
+      }
+      console.log('The ' + chalk.cyan('build_webpack') + ' folder is ready to be deployed.');
+      console.log('You may also serve it locally with a static server:')
+      console.log();
+      if (useYarn) {
+        console.log('  ' + chalk.cyan('yarn') +  ' global add pushstate-server');
+      } else {
+        console.log('  ' + chalk.cyan('npm') +  ' install -g pushstate-server');
+      }
+      console.log('  ' + chalk.cyan('pushstate-server') + ' build');
+      console.log('  ' + chalk.cyan(openCommand) + ' http://localhost:9000');
+      console.log();
+    }
+  });
+}
+
+function copyPublicFolder() {
+  fs.copySync(paths.appPublic, paths.appBuild, {
+    dereference: true,
+    filter: file => file !== paths.appHtml
+  });
+}