[dev] Add yq v4.23.1 as yq4 binary in dev image

[corneliusludmann]

Description

This PR adds yq in version 4.x to the dev image as yq4 binary. That allows to use the more powerful yq version but is still backward compatible where yq in version 3.x is used.

How to test

Open a workspace: https://gitpod.io/#https://github.com/gitpod-io/gitpod/tree/clu/yq4

Check that yq in version 3.x and yq4 in version 4.x is available:

$ yq --version
yq version 3.4.1
$ yq4 --version
yq (https://github.com/mikefarah/yq/) version 4.23.1

Release Notes

NONE

[github-actions]

⚠️ Hey reviewer! BE CAREFUL ⚠️
Review the code before opening in your Gitpod. .gitpod.yml was changed and it might be harmful.

[andreafalzetti]

The change LGTM 🛹

However, when I tested how you suggested, I cannot find yq4 🤔

Also, I am curious to know what features from v4 you (or other folks?) are interested in?

Edit: I've initially approved as the change looked straight forward and correct, but I cannot find the yq4 bin, so I've temporary removed my approval. Happy to re-approve as soon as I can test :)

[corneliusludmann]

However, when I tested how you suggested, I cannot find yq4 thinking

That's odd.

• Yesterday it worked for me.
• Today, when I open https://gitpod.io/#https://github.com/gitpod-io/gitpod/tree/clu/yq4 I don't have the yq4 binary anymore.
• The image defined in the .gitpod.yml has the yq4 binary, though:

  docker run -it --rm eu.gcr.io/gitpod-core-dev/dev/dev-environment:clu-yq4.1 ls /usr/bin
  

My hypothesis: Yesterday I opened the workspace without prebuild. Today, a prebuild is available. Maybe the prebuild did not use the new workspace image (that is defined in the .gitpod.yml and that's why testing it with prebuilds enabled does not work..

Also, I am curious to know what features from v4 you (or other folks?) are interested in?

1. In some images etc. we have yq 4.x installed (e.g. in the installer image). Testing yq 4.x commands in a Gitpod workspace does not work because the CLI interface has been changed entirely.
2. Processing multi-docs files as in post-process.sh is so much easier with yq 4.x.

[corneliusludmann]

Indeed, it's the prebuild that is an incremental prebuild. I updated the prebuild with

https://gitpod.io/#prebuild/https://github.com/gitpod-io/gitpod/tree/clu/yq4

and now it worked.

@andreafalzetti

[meysholdt]

Code changes LGTM. Thx for the PR, @corneliusludmann.