Content is printed twice

[maliroteh]

I have the following sample code:

const setupTasks = new Listr({
    title: 'Root Task',
    task: (ctx, task): Listr =>
        task.newListr(
            [
                {
                    options: { persistentOutput: true },
                    title: 'Sub task 1',
                    task: async (subCtx, subTask): Promise<void> => {
                        await delay(3000);
                        subTask.output = 'Output for sub task 1';
                        return Promise.resolve();
                    }
                },
                {
                    options: { persistentOutput: true },
                    title: 'Sub task 2',
                    task: async (subCtx, subTask): Promise<void> => {
                        await delay(2000);
                        subTask.output = 'Error message for sub task 2';
                        return Promise.reject();
                    }
                },
                {
                    options: { persistentOutput: true },
                    title: 'Sub task 3',
                    task: async (subCtx, subTask): Promise<void> => {
                        await delay(1000);
                        subTask.output = 'Error message for sub task 3';
                        return Promise.reject();
                    }
                }
            ],
            { concurrent: true, exitOnError: false, rendererOptions: { collapse: false, collapseErrors: false } }
        )
});

try {
    await setupTasks.run();
} catch (error) {
    console.log(error);
}

When I run this sample, I see that Listr prints the output twice as tasks progress:

Is there a way to work around this issue to have the result printed only once?

[cenk1cenk2]

It seems it tries to log the error before it finishes rendering. Which it should not do because error is the last thing gets thrown out and you set exit on error to false even. That can break log-update. I will check that out.

[cenk1cenk2]

Okay it expects a Promise.reject with new Error() which is expected from me.

You can have a look at this example or use Promise.reject(new Error('something-something')).
https://repl.it/@CenkKl/listr2289#index.ts