Unhelpful error messages for invalid gatsby-config properties

[geeofree]

Description

Running gatsby develop or gatsby build with an invalid property on gatsby-config.js that's not in any of these throws an unhelpful error message. See below:

gatsby-config.js

Gatsby's CLI Output

Steps to reproduce

1. Go to gatsby-config.js and add any property that's not any of these

2. Run gatsby develop or gatsby build commands

See repo demo file

Expected result

What should happen?

Need to have a useful CLI error messages on gatsby

What happened.

Didn't have a useful CLI error message

Environment

P.S.

I'd like to help resolve this issue and file a PR if someone is willing to guide me through the codebase that needs to be looked at. Currently I've only searched for terms such as dispatch as I guess there's a reducer that's firing an effect somewhere but I'm finding it hard which to look for.

[LekoArts]

Hi, thanks for the issue!
This could potentially be solved with: #16027
I'll try to make the error message better in: #20597

Related issue: #19941

So I'll work on this but we'd be happy to receive a PR from your for our open issues (e.g. tagged with "help wanted"). Thanks!

[geeofree]

Oh. Cool! I'll close this now then. Didn't know this was being worked on already so my b and thanks!