Initial change

.gitignore

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+node_modules
+dist/
+yarn.lock
+package-lock.json

LICENSE

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+This is free and unencumbered software released into the public domain.
+
+Anyone is free to copy, modify, publish, use, compile, sell, or
+distribute this software, either in source code form or as a compiled
+binary, for any purpose, commercial or non-commercial, and by any
+means.
+
+In jurisdictions that recognize copyright laws, the author or authors
+of this software dedicate any and all copyright interest in the
+software to the public domain. We make this dedication for the benefit
+of the public at large and to the detriment of our heirs and
+successors. We intend this dedication to be an overt act of
+relinquishment in perpetuity of all present and future rights to this
+software under copyright law.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
+OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+OTHER DEALINGS IN THE SOFTWARE.
+
+For more information, please refer to <http://unlicense.org/>

main.js

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+// This is free and unencumbered software released into the public domain.
+// See LICENSE for details
+
+const {app, BrowserWindow, Menu, protocol, ipcMain} = require('electron');
+const log = require('electron-log');
+const {autoUpdater} = require("electron-updater");
+
+//-------------------------------------------------------------------
+// Logging
+//
+// THIS SECTION IS NOT REQUIRED
+//
+// This logging setup is not required for auto-updates to work,
+// but it sure makes debugging easier :)
+//-------------------------------------------------------------------
+autoUpdater.logger = log;
+autoUpdater.logger.transports.file.level = 'info';
+log.info('App starting...');
+
+//-------------------------------------------------------------------
+// Define the menu
+//
+// THIS SECTION IS NOT REQUIRED
+//-------------------------------------------------------------------
+let template = []
+if (process.platform === 'darwin') {
+  // OS X
+  const name = app.getName();
+  template.unshift({
+    label: name,
+    submenu: [
+      {
+        label: 'About ' + name,
+        role: 'about'
+      },
+      {
+        label: 'Quit',
+        accelerator: 'Command+Q',
+        click() { app.quit(); }
+      },
+    ]
+  })
+}
+
+
+//-------------------------------------------------------------------
+// Open a window that displays the version
+//
+// THIS SECTION IS NOT REQUIRED
+//
+// This isn't required for auto-updates to work, but it's easier
+// for the app to show a window than to have to click "About" to see
+// that updates are working.
+//-------------------------------------------------------------------
+let win;
+
+function sendStatusToWindow(text) {
+  log.info(text);
+  win.webContents.send('message', text);
+}
+function createDefaultWindow() {
+  win = new BrowserWindow();
+  win.webContents.openDevTools();
+  win.on('closed', () => {
+    win = null;
+  });
+  win.loadURL(`file://${__dirname}/version.html#v${app.getVersion()}`);
+  return win;
+}
+autoUpdater.on('checking-for-update', () => {
+  sendStatusToWindow('Checking for update...');
+})
+autoUpdater.on('update-available', (info) => {
+  sendStatusToWindow('Update available.');
+})
+autoUpdater.on('update-not-available', (info) => {
+  sendStatusToWindow('Update not available.');
+})
+autoUpdater.on('error', (err) => {
+  sendStatusToWindow('Error in auto-updater. ' + err);
+})
+autoUpdater.on('download-progress', (progressObj) => {
+  let log_message = "Download speed: " + progressObj.bytesPerSecond;
+  log_message = log_message + ' - Downloaded ' + progressObj.percent + '%';
+  log_message = log_message + ' (' + progressObj.transferred + "/" + progressObj.total + ')';
+  sendStatusToWindow(log_message);
+})
+autoUpdater.on('update-downloaded', (info) => {
+  sendStatusToWindow('Update downloaded');
+});
+app.on('ready', function() {
+  // Create the Menu
+  const menu = Menu.buildFromTemplate(template);
+  Menu.setApplicationMenu(menu);
+
+  createDefaultWindow();
+});
+app.on('window-all-closed', () => {
+  app.quit();
+});
+
+//
+// CHOOSE one of the following options for Auto updates
+//
+
+//-------------------------------------------------------------------
+// Auto updates - Option 1 - Simplest version
+//
+// This will immediately download an update, then install when the
+// app quits.
+//-------------------------------------------------------------------
+app.on('ready', function()  {
+  autoUpdater.checkForUpdatesAndNotify();
+});
+
+//-------------------------------------------------------------------
+// Auto updates - Option 2 - More control
+//
+// For details about these events, see the Wiki:
+// https://github.com/electron-userland/electron-builder/wiki/Auto-Update#events
+//
+// The app doesn't need to listen to any events except `update-downloaded`
+//
+// Uncomment any of the below events to listen for them.  Also,
+// look in the previous section to see them being used.
+//-------------------------------------------------------------------
+// app.on('ready', function()  {
+//   autoUpdater.checkForUpdates();
+// });
+// autoUpdater.on('checking-for-update', () => {
+// })
+// autoUpdater.on('update-available', (info) => {
+// })
+// autoUpdater.on('update-not-available', (info) => {
+// })
+// autoUpdater.on('error', (err) => {
+// })
+// autoUpdater.on('download-progress', (progressObj) => {
+// })
+// autoUpdater.on('update-downloaded', (info) => {
+//   autoUpdater.quitAndInstall();  
+// })

package.json

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+{
+  "name": "sequencediagrams-electron",
+  "displayName": "Sequence Diagrams",
+  "version": "0.0.1",
+  "main": "main.js",
+  "description": "Sequcnce diagrams applicaton created on electron",
+  "author": "Nagaraju Kotcharlakota",
+  "scripts": {
+    "publish": "build -p always",
+    "pack": "electron-builder --dir",
+    "dist": "electron-builder"
+  },
+  "devDependencies": {
+    "electron": "^2.0.4",
+    "electron-builder": "^20.19.2"
+  },
+  "dependencies": {
+    "electron-log": "^2.2.16",
+    "electron-updater": "^2.23.3"
+  },
+  "build": {
+    "appId": "com.github.klvnraju.sequencediagramselectronapp",
+    "win": {
+      "target": "nsis",
+      "icon": "build/main-icon.ico"
+    }
+  }
+}

version.html

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+<!DOCTYPE html>
+<html>
+
+<head>
+    <title>Electron Updater Example</title>
+</head>
+
+<body>
+    Current version:
+    <span id="version">vX.Y.Z</span>
+    <div id="messages"></div>
+    <script>
+        // Display the current version
+        let version = window.location.hash.substring(1);
+        document.getElementById('version').innerText = version;
+        // Listen for messages
+        const { ipcRenderer } = require('electron');
+        ipcRenderer.on('message', function (event, text) {
+            var container = document.getElementById('messages');
+            var message = document.createElement('div');
+            message.innerHTML = text;
+            container.appendChild(message);
+        })
+    </script>
+</body>
+
+</html>