Publish ECS 9.0.0 documentation

[mjwolf]

Update assembler config to publish ECS v9.0.0 documentation as the current version.

[mjwolf]

I would like this to publish the "9.0" branch of the ecs repo, I'm not completely sure if this is the correct way to do it. If it's possible to publish tags, I can also change this to publish v9.0.0 tag, which will be more exact in publishing the correct version of ecs docs.

I also don't have permission to add a label to this PR, to make the "required-labels / check-labels" check happy here, so could someone add a label for me?

[reakaleek]

Hi @mjwolf,

Thank you for your contribution! To be honest, we don't have a proper current/next strategy yet.
There could be major changes. The changes look fine to me, but I'm not entirely sure about the consequences.

Let's wait for @Mpdreamz or @bmorelli25's opinion.

[Mpdreamz]

The change looks good to me and config wise I don't expect this to change.

Our current/next strategy is defined in the sense we provide the following options:

• current & next are equal
• current & next follow a branching model.
  • here we 'specialize' by being on the DRA and have a variable for all repositories that branch when releases are cut.
  • Other products that have their own versioning scheme or might sometimes lag behind company releases (like ECS).

What's not defined is what repositories will use what strategy.

We have a techical blocker in that we are not currently setup to publish from current branches.

We currently require links.json to be build on the main integration branches: https://github.com/elastic/docs-builder/blob/main/.github/workflows/preview-build.yml#L165-L172

Our workflow is currently only triggering on main and master. We need a Github App to be able to run more dynamically on folks different current branches.

[Mpdreamz]

This is now correctly failing because ecs has not yet build their docs on their 9.0 branch.

elastic/ecs#2476 should now be ready to be merged upstream (and backported to 9.0).

[Mpdreamz]

This LGTM!

Did a full assemble production build locally and hit no errors.