All: Use Lerna to manage monorepo

packages/app-desktop/gui/ErrorBoundary.tsx

@@ -0,0 +1,81 @@
+import * as React from 'react';
+import versionInfo from '@joplinapp/lib/versionInfo';
+const packageInfo = require('../packageInfo.js');
+const ipcRenderer = require('electron').ipcRenderer;
+
+export default class ErrorBoundary extends React.Component {
+
+	state:any = { error: null, errorInfo: null };
+
+	componentDidCatch(error:any, errorInfo:any) {
+		this.setState({ error: error, errorInfo: errorInfo });
+	}
+
+	componentDidMount() {
+		const onAppClose = () => {
+			ipcRenderer.send('asynchronous-message', 'appCloseReply', {
+				canClose: true,
+			});
+		};
+
+		ipcRenderer.on('appClose', onAppClose);
+	}
+
+	render() {
+		if (this.state.error) {
+			try {
+				const output = [];
+
+				output.push(
+					<section key="message">
+						<h2>Message</h2>
+						<p>{this.state.error.message}</p>
+					</section>
+				);
+
+				output.push(
+					<section key="versionInfo">
+						<h2>Version info</h2>
+						<pre>{versionInfo(packageInfo).message}</pre>
+					</section>
+				);
+
+				if (this.state.error.stack) {
+					output.push(
+						<section key="stacktrace">
+							<h2>Stack trace</h2>
+							<pre>{this.state.error.stack}</pre>
+						</section>
+					);
+				}
+
+				if (this.state.errorInfo) {
+					if (this.state.errorInfo.componentStack) {
+						output.push(
+							<section key="componentStack">
+								<h2>Component stack</h2>
+								<pre>{this.state.errorInfo.componentStack}</pre>
+							</section>
+						);
+					}
+				}
+
+				return (
+					<div style={{ overflow: 'auto', fontFamily: 'sans-serif', padding: '5px 20px' }}>
+						<h1>Error</h1>
+						<p>Joplin encountered a fatal error and could not continue. To report the error, please copy the *entire content* of this page and post it on Joplin forum or GitHub.</p>
+						{output}
+					</div>
+				);
+			} catch (error) {
+				return (
+					<div>
+						{JSON.stringify(this.state)}
+					</div>
+				);
+			}
+		}
+
+		return this.props.children;
+	}
+}