init

.gitignore

+# Created by .ignore support plugin (hsz.mobi)
+### Node template
+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+lerna-debug.log*
+
+# Diagnostic reports (https://nodejs.org/api/report.html)
+report.[0-9]*.[0-9]*.[0-9]*.[0-9]*.json
+
+# Runtime data
+pids
+*.pid
+*.seed
+*.pid.lock
+
+# Directory for instrumented libs generated by jscoverage/JSCover
+lib-cov
+
+# Coverage directory used by tools like istanbul
+coverage
+*.lcov
+
+# nyc test coverage
+.nyc_output
+
+# Grunt intermediate storage (https://gruntjs.com/creating-plugins#storing-task-files)
+.grunt
+
+# Bower dependency directory (https://bower.io/)
+bower_components
+
+# node-waf configuration
+.lock-wscript
+
+# Compiled binary addons (https://nodejs.org/api/addons.html)
+build/Release
+
+# Dependency directories
+node_modules/
+jspm_packages/
+
+# TypeScript v1 declaration files
+typings/
+
+# TypeScript cache
+*.tsbuildinfo
+
+# Optional npm cache directory
+.npm
+
+# Optional eslint cache
+.eslintcache
+
+# Optional REPL history
+.node_repl_history
+
+# Output of 'npm pack'
+*.tgz
+
+# Yarn Integrity file
+.yarn-integrity
+
+# dotenv environment variables file
+.env
+.env.test
+
+# parcel-bundler cache (https://parceljs.org/)
+.cache
+
+# next.js build output
+.next
+
+# nuxt.js build output
+.nuxt
+
+# vuepress build output
+.vuepress/dist
+
+# Serverless directories
+.serverless/
+
+# FuseBox cache
+.fusebox/
+
+# DynamoDB Local files
+.dynamodb/
+

bin/zeroing-code-serve.js

+/**
+ * Created by rockyl on 2019-12-25.
+ */
+
+const program = require('commander');
+const {start} = require('../src/index');
+
+program
+	.option('-p, --port [string]', 'Server port', '7788')
+	.option('-f, --file [string]', 'Target file')
+	.parse(process.argv);
+
+if(!program.file){
+	console.error('Target file must be specified');
+}else{
+	start(program);
+}

package.json

+{
+  "name": "code-serve",
+  "version": "1.0.0",
+  "main": "index.js",
+  "license": "MIT",
+  "dependencies": {
+    "commander": "^4.0.1",
+    "fs-extra": "^8.1.0",
+    "socket.io": "^2.3.0"
+  }
+}

src/index.js

+/**
+ * Created by rockyl on 2019-12-25.
+ */
+
+const Server = require('socket.io');
+const path = require('path');
+const fs = require('fs-extra');
+
+exports.start = function (options) {
+	const sockets = [];
+	let watching = false;
+	fs.watch(options.file, {}, (eventType) => {
+		if (watching) {
+			if (eventType === 'change') {
+				const code = fs.readFileSync(options.file, 'utf-8');
+				for(let socket of sockets){
+					socket.emit('edit-save', code);
+				}
+			}
+		}
+	});
+
+	let server = Server(options.port);
+	server.on('connection', function (socket) {
+		sockets.push(socket);
+		socket.on('disconnect', function () {
+			sockets.splice(sockets.indexOf(socket), 1);
+		});
+		socket.on('edit-open', function (data) {
+			fs.ensureDir(path.dirname(options.file));
+
+			watching = false;
+			fs.writeFileSync(options.file, data);
+			setTimeout(function () {
+				watching = true;
+			}, 500);
+		})
+	});
+};

zeroing-code-serve.iml

+<?xml version="1.0" encoding="UTF-8"?>
+<module type="WEB_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>
\ No newline at end of file