support continue when error occurs - fixes #34

index.js

@@ -26,6 +26,8 @@ class Listr {
 		this._tasks = [];
 		this._RendererClass = renderer.getRenderer(this._options.renderer, this._options.nonTTYRenderer);
 
+		this.exitOnError = this._options.exitOnError;
+
 		this.add(tasks || []);
 	}
 

lib/task.js

@@ -84,6 +84,10 @@ class Task extends Subject {
 		const handleResult = result => {
 			// Detect the subtask
 			if (utils.isListr(result)) {
+				result._options = Object.assign(this._options, result._options);
+
+				result.exitOnError = result._options.exitOnError;
+
 				result.setRenderer(renderer.getRenderer('silent'));
 				this._subtasks = result.tasks;
 
@@ -148,7 +152,18 @@ class Task extends Subject {
 			})
 			.catch(err => {
 				this.state = state.FAILED;
-				throw err;
+
+				this._output = err.message;
+
+				this.next({
+					type: 'DATA',
+					data: err.message
+				});
+
+				if (this._listr.exitOnError !== false) {
+					// Do not exit when explicitely set to `false`
+					throw err;
+				}
 			})
 			.then(() => {
 				// Mark the Observable as completed