Allow loading and running cfg file from argument

TrimSPelec.js

@@ -120,6 +120,19 @@ function fallbackBrowseForFolder() {
     picker.click();
 }
 
+function loadConfigFile(filename, autoRun = false) {
+    console.log('Open file ' + filename);
+    fs.readFile(filename.toString(), function read(err, data) {
+	if (err) {
+	    throw err;
+	}
+	setValues(data);
+	if (autoRun) {
+	    setTimeout(() => startSim(), 0);
+	}
+    });
+}
+
 function firstLoad() {
     document.getElementById("trimPath").value = process.cwd();
     if (typeof syncStatusBar === 'function') {
@@ -140,13 +153,12 @@ function firstLoad() {
     
     // Catch calls for open file
     ipcRenderer.on('openFile', function(event, filename) {
-	console.log('Open file '+filename);
-	fs.readFile(filename.toString(), function read(err, data) {
-	    if (err) {
-		throw err;
-	    }
-	    setValues(data);
-	});
+	loadConfigFile(filename, false);
+    });
+
+    ipcRenderer.on('openFileAndMaybeRun', function(event, payload) {
+	if (!payload || !payload.filename) { return; }
+	loadConfigFile(payload.filename, !!payload.autoRun);
     });
     
     // Catch calls for selectfolder

main.js

@@ -2,9 +2,27 @@ const path = require('path');
 const { app, BrowserWindow, Menu, dialog, ipcMain, fs } = require('electron');
 
 let currentWorkPath = process.cwd();
+const startupOptions = parseStartupOptions(process.argv);
 
 app.setName('TrimSP');
 
+function parseStartupOptions(argv) {
+    const options = {
+	configPath: null,
+	autoRun: false,
+    };
+
+    for (const arg of argv.slice(1)) {
+	if (arg === '--run') {
+	    options.autoRun = true;
+	} else if (!arg.startsWith('--') && options.configPath == null) {
+	    options.configPath = path.resolve(arg);
+	}
+    }
+
+    return options;
+}
+
 function showAboutDialog(parentWindow) {
     const detail = [
 	'TRIM.SP simulation GUI for low-energy ion implantation studies.',
@@ -67,6 +85,15 @@ function createWindow () {
 	}
     })
 
+    win.webContents.on('did-finish-load', () => {
+	if (startupOptions.configPath) {
+	    win.webContents.send('openFileAndMaybeRun', {
+		filename: startupOptions.configPath,
+		autoRun: startupOptions.autoRun,
+	    });
+	}
+    });
+
     
     let template = [
 	{