How can a custom Angular builder retrieve output from scheduleTarget?

“How can a custom Angular builder retrieve output from the scheduleTarget method, and what are the steps involved in accessing and handling this output within the builder’s implementation?”

To retrieve the output from scheduleTarget in a custom Angular builder, you'll need to follow a series of steps to properly schedule the target, run the builder, and handle its output. Here’s how you can do it:

Step 1: Create a Custom Builder First, set up a basic custom builder. This involves creating a new builders directory and adding a builder configuration file.

Step 2: Define the Builder Configuration In your angular.json, define your custom builder under the architect section

Step 3: Implement the Custom Builder Create a file for your builder, for example, custom-builder.ts. Implement the createBuilder function and use the scheduleTarget method to schedule a target

Step 4: Register the Custom Builder In your angular.json file, register the custom builder by specifying its path.

Step 5: Run the Custom Builder Run your custom builder using the Angular CLI

Explanation: Define the Target: The target object specifies the project, target (e.g., 'build'), and configuration (optional) that you want to schedule.

Schedule the Target: The context.scheduleTarget method schedules the target for execution and returns an observable.

Handle the Output: Subscribe to the observable and handle the build event. Access the output path from buildEvent.outputPath and perform any necessary actions.

By following these steps, you can retrieve and handle the output from scheduleTarget within your custom Angular builder.