Support LFS in templates

Some repos use LFS in the build stage. The templates should support the use of LFS in an easy way.

I did a test to add support for repositories that require to fetch files from LFS for the build stage using the reorganized template scheme.

This change introduces the reusable code for using LFS:

https://git.code.tecnalia.com/tecnalia_robotics-public/gitlab_templates/-/blob/test-lfs-concept/ci-templates/core.yml#L18-L29

And a user could introduce the use of LFS using:

https://git.code.tecnalia.com/tecnalia_robotics/avanwinglet/dpm_analyzer/-/blob/73f7ccba41fb2b0e8e5a304f7d4488b49c8774cc/.gitlab-ci.yml

Two pending things:

• current approach overwrites existing AFTER_SETUP_UPSTREAM_WORKSPACE
• it only considers LFS in upstream, a better hook might be after_setup_target_workspace (again pending how not to overwrite)

There are many hooks available, there are BEFORE_ and AFTER_ hooks for each step in the industrial-ci's workflow you could try with BEFORE_BUILD_TARGET_WORKSPACE instead.

Apart from chosing an appropriate hook, what I had in mind is to try if I could append whatever value the hook already had with the new injected LFS-related code. That would make it easier to maintain in the future.

I don't think that is possible with GitLab-CI.

created merge request !67 (merged) to address this issue

mentioned in merge request !67 (merged)

mentioned in commit 9deafef0

closed with merge request !67 (merged)