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Created May 21, 2018
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How to keep in sync your Git repos on GitHub, GitLab & Bitbucket easily
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How to keep in sync your Git repos on GitHub, GitLab & Bitbucket easily
git
github
gitlab
bitbucket
MoOx

GitHub is nice, but maybe, just in case of long outage or because you don’t want to be tied to GitHub that much, you may want to have mirrors or your repos somewhere else. Here is a nice way to keep not just read only mirrors, but real git repos on GitLab and BitBuckets as well.

Reminder: to be safe setup SSH and Two factor Auth for all places (except Two factor Auth for BitBuckets, cause it’s not compatible with the CLI tool).

tl;dr?

Git Tooling

In order to facilitate the setup, we will install some CLI tools for each services.

Github

We will use hub.

For macOS, it’s easy.

brew install hub

See Hub installation instruction page for others OSes.

You will need a GitHub token.

Place it in your home folder in a .github_token file, and load it in your .bash/zshrc like this:

if [[ -f $HOME/.github_token ]]
then
  export GITHUB_TOKEN=$(cat $HOME/.github_token)
fi

GitLab

GitLab CLI is available via rubygem:

(sudo) gem install gitlab

Please set an endpoint to API

GitLab requires a token and an endpoint.

For the token, grab you GitLab private token here and use the same solution as GitHub. Here is an example using GitLab “official” online instance that you should add in your .bash/zshrc:

if [[ -f $HOME/.gitlab_token ]]
then
  export GITLAB_API_PRIVATE_TOKEN=$(cat $HOME/.gitlab_token)
fi
export GITLAB_API_ENDPOINT="https://gitlab.com/api/v3"

BitBucket

BitBucket CLI is available via pip:

(sudo) pip install bitbucket-cli

BitBucket does not work well with a token… 2fa is not convenient (and impossible to use with ssh) So you will have to enter login/pwd all the time or put that in clear in a .bitbucket file


Now that we have all the tools, let's start by creating a repo on each services.

Create a repo on GitHub, GitLab & Bitbucket using CLI

The commands below assume that your username is the same on each services. If that's not the case, just adjust the command by replacing all variables.

We will create/reuse a folder, init a local git repo, and push it to all those services.

Your git repo exists

Just go into your repo and do

GIT_REPO_NAME=$(basename $(pwd))

You don't have a git repo yet

GIT_REPO_NAME="your-repo"
mkdir $GIT_REPO_NAME && cd $GIT_REPO_NAME
git init

Create repo on GitHub via CLI

hub create

This command create the repo and add the remote automatically.

Create repo on GitLab via CLI

gitlab create_project $GIT_REPO_NAME "{visibility_level: 20}"

(Public visibility). Source

We will add the remote later, it's part of the trick ;)

Create repo on BitBucket via CLI

bb create --protocol=ssh --scm=git --public $GIT_REPO_NAME

Source

Configuring remotes

Depending on what you want or need, you will have multiple choice to configure your repo.

For a single main repo and simple “mirrors”, you can use this

git remote set-url origin --add https://gitlab.com/${USER}/${GIT_REPO_NAME}.git
git remote set-url origin --add https://bitbucket.org/${USER}/${GIT_REPO_NAME}.git

You can check with

git remote -v
origin	https://github.com/MoOx/your-repo.git (fetch)
origin	https://github.com/MoOx/your-repo.git (push)
origin	https://gitlab.com/MoOx/your-repo.git (push)
origin	https://bitbucket.org/MoOx/your-repo.git (push)

Now you can just use git push 🙂.


⚠️ Note: to enforce ssh instead of https here is a simple trick

git config --global url.ssh://git@github.com/.insteadOf https://github.com/
git config --global url.ssh://git@gitlab.com/.insteadOf https://gitlab.com/
git config --global url.ssh://git@bitbucket.org/.insteadOf https://bitbucket.org/

Problem is: git pull will only pull from the first url.

There is inconsitencies with git push --all (push all branches to default remote) and git pull --all (pull from the first url of the default remote).

Here is a detailed post on configuring multiples remote for push, pull or both.

tl;dr: we will have to add other remotes to be able to push.

git remote add origin-gitlab https://gitlab.com/${USER}/${GIT_REPO_NAME}.git
git remote add origin-bitbucket https://bitbucket.org/${USER}/${GIT_REPO_NAME}.git

You can double check with:

git remote -v
origin	ssh://git@github.com/MoOx/your-repo.git (fetch)
origin	ssh://git@github.com/MoOx/your-repo.git (push)
origin	ssh://git@gitlab.com/MoOx/your-repo.git (push)
origin	ssh://git@bitbucket.org/MoOx/your-repo.git (push)
origin-gitlab	ssh://git@gitlab.com/MoOx/your-repo.git (fetch)
origin-gitlab	ssh://git@gitlab.com/MoOx/your-repo.git (push)
origin-bitbucket	ssh://git@bitbucket.org/MoOx/your-repo.git (fetch)
origin-bitbucket	ssh://git@bitbucket.org/MoOx/your-repo.git (push)

Now you can use git push to push to all remotes and use git pull —all to pull from all remotes. My 2 cents: use an alias to pull all by default. If you have a single remote this won’t change anything and will work if you have more than one.

⚠️ You might need a warning that will ask you to do

git branch --set-upstream-to=origin/master master

I use gg to pull and gp to push :)

Pulling from multiple remotes with different updates

Un cas de figure peut être problématique: un commit dans la master sur un repo, un autre commit dans une autre master d’un autre repo, on fetch le tout en local, on veut pousser… Et bam. On va être obligé de force pusher. A part ce cas de figure (qui je l’accorde n’est pas terrible à gérer, mais devrait rester rarissime), je ne vois pas d’autre soucis potentiel. Avec un peu de discipline et de rigueur, on devrait s’en tirer :)

Note about force push

open https://gitlab.com/${USER}/${GIT_REPO_NAME}/protected_branches

GitLab protect the master branch by default. So force push will not work. I always make one force push or two for the first commit of a project, when CI fail etc (I know I should not). Now you have been warned.

For existing GitHub repo

Je n’ai encore rien tester mais voici 2 outils qui devrait pouvoir aider.

https://pypi.python.org/pypi/github2gitlab https://github.com/xuhdev/backup-on-the-go

A la limite ajouter les repos au fur et à mesure est aussi une solution, celle que j’adopterais.

FAQ

Handling issues and Pull/Merge request

Good question. For that, I don’t have the silver bullet. I think I will use GitHub as the main repo. But if there is outage, I will have fallbacks! That’s the idea of this approach: not being tied to a single service.

Commit from web UI

Not a problem. I tried. You commit on the web (eg: comment, notes in README etc). You pull, you push. Done. The origin you edited on the web will be up to date already, but other will be updated.

tl;dr (with all CLI tools installed and configured)

  1. If you GitHub/GitLab/BitBucket is not exactly your $USER
USER=MoOx
  1. For New repo (if your repo already exist on GitHub, go to 2.)
GIT_REPO_NAME=your-repo
mkdir $GIT_REPO_NAME && cd $GIT_REPO_NAME
git init
hub create
  1. For existing GitHub repo
GIT_REPO_NAME=$(basename $(pwd))
gitlab create_project $GIT_REPO_NAME "{visibility_level: 20}"
bb create --protocol=ssh --scm=git --public $GIT_REPO_NAME
git remote set-url origin --add https://gitlab.com/${USER}/${GIT_REPO_NAME}.git
git remote set-url origin --add https://bitbucket.org/${USER}/${GIT_REPO_NAME}.git
git remote add origin-gitlab https://gitlab.com/${USER}/${GIT_REPO_NAME}.git
git remote add origin-bitbucket https://bitbucket.org/${USER}/${GIT_REPO_NAME}.git
  1. Check that everything is ok
git remote -v
origin  ssh://git@github.com/MoOx/your-repo.git (fetch)
origin  ssh://git@github.com/MoOx/your-repo.git (push)
origin  ssh://git@gitlab.com/MoOx/your-repo.git (push)
origin  ssh://git@bitbucket.org/MoOx/your-repo.git (push)
origin-bitbucket        ssh://git@bitbucket.org/MoOx/your-repo.git (push)
origin-bitbucket        ssh://git@bitbucket.org/MoOx/your-repo.git (fetch)
origin-gitlab   ssh://git@gitlab.com/MoOx/your-repo.git (fetch)
origin-gitlab   ssh://git@gitlab.com/MoOx/your-repo.git (push)

😇 Now you can just git push and git pull!

Bonus: badges

You can add some nices badges to show the redundancy on your project README

[![Repo on GitHub](https://img.shields.io/badge/repo-GitHub-3D76C2.svg)](https://github.com/MoOx/your-repo)
[![Repo on GitLab](https://img.shields.io/badge/repo-GitLab-6C488A.svg)](https://gitlab.com/MoOx/your-repo)
[![Repo on BitBucket](https://img.shields.io/badge/repo-BitBucket-1F5081.svg)](https://bitbucket.org/MoOx/your-repo)
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