feat: GitLab

[apricote]

We currently only support repositories on GitHub, I would like to see support for GitLabs APIs and GitLab CI.

Implementation

API (Forge)

This was implemented in these pull requests:

• 49

• 51

• 53

• 54

GitLab CI/CD

This is a bit more complicated. GitLab CI/CD has multiple drawbacks against GitHub Actions:

• CI/CD pipelines can only be started on repository events, like pushes. We can not start a new job whenever the description is changed
• The default API Token that as available in the pipeline is severly restricted. The only way around this is with a (project/group/personal) access token with the permissions api and write_repository.

This is currently in progress:

• 55

I have also thought about adding a Webhook server that one can deploy to manually create CI jobs when the description is updated.

[jooola]

To run this tool in GitLab CI pipelines, we must be able to shell into the container image. The default base image from ko seem to not provide a shell. We might need to add a shell binary or swap the base image with something more flexible.

[apricote]

I think with Steps we could keep publishing a ko-built image and use it on GitLab. Downside is that Steps are marked as experimental right now.

Alternatively we can switch the ko base image from cgr.dev/chainguard/static to cgr.dev/chainguard/busybox (ash) or cgr.dev/chainguard/bash.

[apricote]

First usable version of this was published in v0.4.0-beta.1. Still working on documentation before creating a proper release

[apricote]

Docs are now available and this will be released in 0.4.0.