Feature Request: Gitlab Support

[entropitor]

It would be nice if git-spice also supported creating Merge Requests in GitLab

If it's not supported, it would also already be helpful to allow pushing all branches in the stack after restacking

[abhinav]

Hello, thanks for the feature request.
While I don't have plans to implement this myself in the near future, I would welcome a PR implementing it, and would be willing to work with the contributor to get the PR merged.

For those looking to add GitLab or other code forges, there's space specifically carved out in the architecture to permit this without intrusive code changes:

• For a new forge, one must implement the Forge interface and register it.
• Forges can record arbitrary metadata about the review unit as long as they tell the system how to serialize and deserialize it. For example, the GitHub forge actually records the PR number, the PR GraphQL ID, and information about the stack navigation comment.
• For authentication, again, forges implement the authentication flow and how to serialize and deserialize the authentication token for secure storage.

All GitHub specific details are implemented in the forge/github package for reference.

[abhinav]

RE: this:

If it's not supported, it would also already be helpful to allow pushing all branches in the stack after restacking

That's possible today! You can use the --no-publish flag of the submit commands to push branches without creating PRs. If you have trouble using that with GitLab or non-GitHub forges, please let me know (preferably in a different issue), and we can get that fixed up.