First commit

.gitignore

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+node_modules
+build

.node-version

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+8.6.0

Readme.md

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+https://github.com/prettier/prettier#pre-commit-hook

index.js

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+#!/usr/bin/env node
+const puppeteer = require("puppeteer");
+const http = require("http");
+const https = require("https");
+const express = require("express");
+const serveStatic = require("serve-static");
+const fallback = require("express-history-api-fallback");
+const path = require("path");
+const Url = require("url");
+const _ = require("highland");
+const program = require("commander");
+const fs = require("fs");
+const mkdirp = require("mkdirp");
+const minify = require("html-minifier").minify;
+
+const crawl = options => {
+  let shuttingDown = false;
+  process.on("SIGINT", () => {
+    if (shuttingDown) {
+      process.exit();
+    } else {
+      shuttingDown = true;
+      console.log(
+        "Gracefully shutting down. To exit immediately, press ^C again"
+      );
+    }
+  });
+
+  const buildDir = path.normalize(`${__dirname}/${options.build || "build"}`);
+  const startServer = options => {
+    const app = express()
+      .use(serveStatic(buildDir))
+      .use(fallback("index.html", { root: buildDir }));
+    const server = http.createServer(app);
+    server.listen(options.port);
+    return server;
+  };
+
+  const basePath = `http://localhost:${options.port}/`;
+  const basedomain = "localhost";
+  const queue = _();
+  let enqued = 0;
+  let processed = 0;
+  const uniqRegister = {};
+  const addToQueue = (url, referer) => {
+    if (Url.parse(url).hostname === basedomain && !uniqRegister[url]) {
+      uniqRegister[url] = true;
+      enqued++;
+      queue.write(url);
+    }
+  };
+
+  const fetchPage = async url => {
+    if (shuttingDown) return;
+    console.log(url);
+    const browser = await puppeteer.launch();
+    const page = await browser.newPage();
+    await page.goto(url, { waitUntil: "networkidle" });
+    const links = await page.evaluate(() =>
+      Array.from(document.querySelectorAll("a")).map(link => link.href)
+    );
+    links.map(addToQueue);
+    const content = await page.evaluate(
+      () => document.documentElement.outerHTML
+    );
+    const route = url.replace(basePath, "");
+    let filePath = path.join(buildDir, route);
+    mkdirp.sync(filePath);
+    const minifiedContent = minify(content, {
+      minifyCSS: true,
+      removeComments: true,
+      collapseBooleanAttributes: true,
+      collapseWhitespace: true,
+      collapseInlineTagWhitespace: true,
+      decodeEntities: true,
+      keepClosingSlash: true,
+      sortAttributes: true,
+      sortClassName: true
+    });
+    fs.writeFileSync(path.join(filePath, "index.html"), minifiedContent);
+
+    return browser.close().then(() => {
+      processed++;
+      if (enqued === processed) queue.end();
+    });
+  };
+
+  const server = startServer(options);
+  const url = options.url || `http://localhost:${options.port}/`;
+  addToQueue(url);
+
+  queue
+    .map(x => _(fetchPage(x)))
+    .parallel(options.concurrency)
+    .collect()
+    .done(function() {
+      server.close();
+    });
+};
+
+const { version } = require("./package.json");
+
+program
+  .version(version)
+  .description("Prerender Create React App.")
+  .option(
+    "-p, --port [port]",
+    "Temporary webserver port (Default: 45678)",
+    45678
+  )
+  .option("-b, --build [build]", "Webserver root (Default: build)", "build")
+  .option("-c, --concurrency [concurrency]", "Concurrency of crawler", 3)
+  .option("--progress [progress]", "Show progress", true)
+  .parse(process.argv);
+
+crawl(program);

package.json

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+{
+  "name": "react-snap",
+  "version": "1.0.0",
+  "description": "react-snapshot, prep e.t.c",
+  "main": "index.js",
+  "author": "stereobooster",
+  "license": "MIT",
+  "dependencies": {
+    "commander": "^2.11.0",
+    "express": "^4.16.1",
+    "express-history-api-fallback": "^2.2.1",
+    "highland": "^2.11.1",
+    "html-minifier": "^3.5.5",
+    "mkdirp": "^0.5.1",
+    "puppeteer": "^0.11.0",
+    "serve-static": "^1.13.1"
+  },
+  "devDependencies": {
+    "prettier": "1.7.3"
+  },
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1",
+    "precommit": "prettier --write *.{js,json,css}"
+  },
+  "bin": {
+    "react-snap": "./index.js"
+  }
+}