This article will tell you how to easily share your GitLab project (as a mirror) with other code management platforms.

Throughout this tutorial we are using public repository at following location: https://github.com/mkopsnc/beaver. However, you can use any other repository.

Set up a push mirror from GitLab to GitHub

Create personal access token

Before you can proceed with the setup of mirror, you have to create personal access token:

Github - how to create personal access token at Github
Gitlab - how to create personal access token at Gitlab
Bitbucket - how to create personal access token at Bitbucket

Set up a push mirror on gitlab.eufus.psnc.pl

Log in to gitlab.eufus.psnc.pl
On the top bar, select Menu > Projects and find your project
On the left sidebar, select Settings > Repository
Expand Mirroring repositories

Enter a Git repository URL

Enter a Git repository URL with this format:

If you have Github repo - https://<your_github_username>@github.com/<github_group>/<github_project>.git
If you have Gitlab repo - https://<your_gitlab_username>@gitlab.com/<gitlab_group>/<gitlab_project>.git
If you have Bitbucket repo - https://<your_bitbucket_username>@bitbucket.com/<bitbucket_group>/<bitbucket_project>.git

For Password, enter your GitHub personal access token
Select Mirror repository

The mirrored repository is listed. For example:

How to synchronise with GitHub?

Make some code changes on GitLab and commit it
Log in to gitlab.eufus.psnc.pl
On the top bar, select Menu > Projects and find your project
On the left sidebar, select Settings > Repository
Expand Mirroring repositories
And click refresh button Udpdate now

Such information should appear on the website:
"The remote repository is being updated..."
Check your repository on github. Changes should be already pushed from ACH GitLab

How to synchronise ITER repository with Gitlab?

Special thanks goes to Karel van de Plassche for providing these steps

Push plugin at ITER is based on: https://github.com/ef-labs/stash-hook-mirror/wiki

Check the push permissions in Settings > Repository > Protected Branches (by default "Maintainer")
Create a Project Access Token in Settings > Access Tokens. I've given it full permissions (everything ticked). Also put the expiry time on something sane (by default 4 weeks - I just put infinite) and put the role to the permissions of step 1.

Fill in the screen below:

Mirror Repo Url needs to be HTTPS, e.g. https://gitlab.eufus.psnc.pl/imas/imaspy.git
Username can be anything, as we're using tokens
Password the token generated in step 2
Refspec can be the default; this brings expected behaviour, e.g. a full mirror
Keep all boxes ticked