index.js

const fs = require("fs");
const http = require("http");
const execSync = require("child_process").execSync;
const path = require("path");

const watchFileName = "TiddlyWiki.html";
const watchDir = path.resolve(process.env.HOME, "Downloads");
const watchFilepath = path.resolve(watchDir, watchFileName);
const root = path.dirname(__filename);
const serverPort = 8848;
const rootWikiPath = path.resolve(root, watchFileName);
const commitScriptPath = path.resolve(root, "script", "commit.sh");
const config = {
  watchFileName,
  watchDir,
  watchFilepath,
  root,
  serverPort,
  rootWikiPath,
  commitScriptPath,
};

console.log(`current config \n ${JSON.stringify(config, null, "\t")}\n`);

http
  .createServer(function (req, res) {
    if (!execSync("git status", {
      cwd: root
    }).toString().includes("Your branch is up to date with")) {
      execSync(`git pull`, {
        cwd: root
      })
      execSync(`git push`, {
        cwd: root
      })
    }
    if (req.url !== `/${watchFileName}`) {
      res.writeHead(302, {
        Location: `http://127.0.0.1:${serverPort}/${watchFileName}`,
      });
      res.end();
      return;
    }
    fs.readFile(rootWikiPath, function (_, data) {
      res.writeHead(200, {
        "Content-Type": "text/html",
        "Content-Length": data.length,
      });
      res.write(data);
      res.end();
    });
  })
  .listen(serverPort);

console.log(`wiki start at http://127.0.0.1:${serverPort}/${watchFileName}`);

fs.watch(watchDir, function (_, filename) {
  if (filename !== watchFileName) {
    return;
  }
  const exist = fs.existsSync(watchFilepath);
  if (!exist) {
    return;
  }
  console.log("copy file");
  fs.renameSync(watchFilepath, rootWikiPath);
  execSync(`/bin/sh ${commitScriptPath}`, () => { });
});

console.log(`wiki watch ${watchDir} now`);