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Ingwie Phoenix
Ingwie Phoenix

Reputation: 2983

Mirroring from GitLab to GitHub

I have been using a private GitLab instance to hold all my code. But since most of the staff that work with me now have a GitHub account, i would really like to get moving and mirror my Gitlab repo to Github.

My situation:

I know that there is the --mirror switch in git, but I am not really sure how this is ment to work. Documentation I found online was very wonky... So it would be nice if someone could help me out. :)

Upvotes: 82

Views: 52516

Answers (6)

vainman
vainman

Reputation: 457

If there are too many repos on your gitlab, it's too difficult to migrate or mirror those repos.

I was in the same situation before, to solve this, I wrote an easy tool to mirror all you visible repos between gitlab and github. For example, it will mirror-clone all you visible repos on gitlab, create repos on your github account, and mirror-push them.

Gitee is not supported now, you could see tests.go to reliaze how to use it.

https://github.com/kom0055/git-mirror

I'm writing a more specific readme.

Upvotes: 2

AmeeraJ
AmeeraJ

Reputation: 91

Post Aug 13, 2021 Use of just username/password for mirroring repo from GitLab to GitHub will fail because we need to use a personal access token (PAT) to do this.

Step 1: Create a PAT from GitHub:

  • Click on your GitHub profile icon on the top right corner
  • Click Settings
  • From the menu shown on the left, click Developer Settings
  • Click Personal access tokens
  • Click Generate new token
  • Add a note that will help you identify the scope of the access token to be generated
  • Choose the Expiration period from the drop down menu (Ideally you should avoid choosing the No Expiration option)
  • Finally, select the scopes you want to grant the corresponding access to the generated access token. Make sure to select the minimum required scopes otherwise you will still have troubles performing certain Git Operations.
  • Finally click Generate Token.

You should also be able to see your personal access token. Make sure to copy it as we will need it in the following step(s).

Step 2: From GitLab, Go to repo you wish to mirror:

  • Click on Settings.
  • Click on Repository.
  • Click on Mirror Repo option --> Expand it.
  • Use below url for Git repository URL: https://<<githubtoken>>@github.com/<<username>>/<<repositoryname>>.git
  • Use the token created in Step 1 to use in the part in URL above.
  • Click on Mirror Repository button without filling the password field.

Upvotes: 6

alierdogan7
alierdogan7

Reputation: 840

If you prefer SSH connection over HTTPS connection for GitLab to GitHub mirroring:

  • Copy SSH clone URL from your GitHub repository. (e.g. [email protected]:yourusername/yourrepositoryname.git)
  • In GitLab, go to Settings > Repository > Mirroring repositories. in your repository page.
  • Input repository URL. Don't directly paste copied link! Modify it like ssh://[email protected]/yourusername/yourrepositoryname.git
  • Select Authentication method as SSH public key.
  • Click Mirror repository.
  • After adding, click "Copy SSH public key" button next to your repository link. enter image description here
  • In GitHub, go to your target repository page and navigate Settings > Deploy keys, click to Add deploy key button and paste your public SSH key which was generated by GitLab.
  • Don't forget to check Allow write access checkbox as GitLab will require write access to mirror.

Reference

Upvotes: 19

knocte
knocte

Reputation: 17919

GitLab has now an option to do this from the UI, go to the Settings->Repository of your repo:

https://gitlab.com/yourUserNameInGitLab/yourRepoName/settings/repository

Then find the option "Mirror a repository" and click on expand. What you want to do is choose the "Push" mirror direction and fill this URL:

https://[email protected]/yourUserNameInGitHub/yourRepoName.git

In the password field, you have to use a Personal Access Token (as GitHub has deprecated password access now), which you can generate here: https://github.com/settings/tokens (don't forget to enable the "repo" and "workflow" permissions when generating it)

Upvotes: 87

Kris
Kris

Reputation: 19938

Another options is to add an additional URL to the origin:

git remote set-url --add origin [email protected]:<USERNAME>/<PROJECTNAME>.git

When you push to origin it will push to both the original origin (gitlab) and the one added above (github).

Upvotes: 25

matrixanomaly
matrixanomaly

Reputation: 6947

This previous StackOverflow question addresses how to move your repository from another service over to GitHub, the first answer there addresses how to do it via command line, and the second and third are more user friendly ways, which unfortunately will not work for you if your GitLab instance is on your local server (which seems to be your case).

You can however 'import' your repository from the command line to GitHub as explained by GitHub docs, this is the suggested way as GitHub offers this as an alternative to using their GitHub Importer tool (which is highlighted in that previous SO question)

A run down of steps as taken from the documentation:

  1. Create a new repository you want to push to in GitHub.

  2. Make a local bare clone from your GitLab server:

    git clone --bare https://githost.org/extuser/repo.git

A bare clone is an exact duplicate, without a working directory for editing files, so it's a clean export.

  1. Change into that directory and then push it with the --mirror flag. The mirror flag ensures that references (branches/tags) are copied to GitHub.

    cd *repo.git*

    git push --mirror https://github.com/ghuser/repo.git

  2. Finally remove the local repository you made.

    cd ..

    rm -rf repo.git

Upvotes: 15

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