Easier to get command output

[simenandre]

Describe the enhancement

There are a few Github Actions that require the command output, like docker/build-push-action, bjerkio/kopier and pulumi/action.

I've personally added this functionality twice so far, so I thought it might be something we should consider adding to @actions/exec directly?

Code Snippet

import { getCommandOutput } from '@actions/exec';

const output = await getCommandOutput('echo', ['hello', 'world']);

// output = "hello world"

[rcowsill]

Here's another implementation of that functionality: https://github.com/satackey/actions-exec-listener

[simenandre]

Here's another implementation of that functionality: satackey/actions-exec-listener

Thank you so much for sharing that, @rcowsill!