How to allow silent merging of empty yaml files

[benosman]

Hello,

I'm looking to use yq to create a merged yaml file in my ci build process.

The combined yaml file will be made up of up to three different files, but there is a chance some of them may be empty, or even missing.

Currently when you pass in an empty yaml file yq returns the following error Asked to process document index 0 but there are only 0 document(s)

How is an elegant way to handle this situation in a bash script?

Ideally I'd like a yq flag that permits empty files to be silently ignored.